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Fencer Vulns
high 7.8

CVE-2023-4623 json

Use-after-free in Linux kernel's net/sched: sch_hfsc (HFSC qdisc traffic control) component

published 2023-09-06 3 y ago modified 2026-10-14 25 d ago also EUVD-2023-54476

cvss
7.8
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.3%
EPSS 0.3% chance of exploitation in 30 days, percentile 20%
public exploits
0
none known

Summary

A use-after-free vulnerability in the Linux kernel's net/sched: sch_hfsc (HFSC qdisc traffic control) component can be exploited to achieve local privilege escalation.

If a class with a link-sharing curve (i.e. with the HFSC_FSC flag set) has a parent without a link-sharing curve, then init_vf() will call vttree_insert() on the parent, but vttree_remove() will be skipped in update_vf(). This leaves a dangling pointer that can cause a use-after-free.

We recommend upgrading past commit b3d26c5702c7d6c45456326e56d2ccf3f103e60f.

Patch / fix

  • Linux Kernel 6.6
  • Siemens SIMATIC S7-1500 CPU 1518-4 PN/DP MFP V3.1.5
  • Siemens SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP V3.1.5
  • Siemens SIMATIC S7-1500 TM MFP - GNU/Linux subsystem V1.1
  • Siemens SIPLUS S7-1500 CPU 1518-4 PN/DP MFP V3.1.5
  • linux Debian 12 6.1.55-1
  • linux Debian 14, Debian 13 6.5.3-1

debian advisories DEBIAN-CVE-2023-4623

  • linux Ubuntu 20.04 LTS 5.4.0-165.182
  • linux Ubuntu 22.04 LTS 5.15.0-87.97
  • linux-aws Ubuntu 20.04 LTS 5.4.0-1112.121
  • linux-aws Ubuntu 22.04 LTS 5.15.0-1048.53
  • linux-gcp Ubuntu 20.04 LTS 5.4.0-1116.125
  • linux-gcp Ubuntu 22.04 LTS 5.15.0-1045.53
  • linux-gke Ubuntu 22.04 LTS 5.15.0-1045.50
  • linux-ibm Ubuntu 20.04 LTS 5.4.0-1059.64

ubuntu advisories UBUNTU-CVE-2023-4623

Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • kernel RHEL 9 5.14.0-362.18.1.el9_3
  • rv RHEL 9 5.14.0-362.18.1.el9_3
  • perf RHEL 9 5.14.0-362.18.1.el9_3
  • rtla RHEL 9 5.14.0-362.18.1.el9_3
  • bpftool RHEL 9 7.2.0-362.18.1.el9_3
  • libperf RHEL 9 5.14.0-362.18.1.el9_3
  • kernel-rt RHEL 9 5.14.0-362.18.1.el9_3
  • kernel-64k RHEL 9 5.14.0-362.18.1.el9_3

red hat advisories RHSA-2024:0461RHSA-2024:0439RHSA-2024:0431RHSA-2024:0432RHSA-2024:0448RHSA-2024:0412

  • dtb-aarch64 openSUSE Leap 15.5 5.14.21-150500.55.31.1
  • kernel-64kb SLE Module for Basesystem 15 SP5, openSUSE Leap 15.5 5.14.21-150500.55.31.1
  • kernel-syms SLE Module for Development Tools 15 SP5, openSUSE Leap 15.5 5.14.21-150500.55.31.1
  • kernel-obs-qa openSUSE Leap 15.5 5.14.21-150500.55.31.1
  • kernel-source SLE Module for Development Tools 15 SP5, SLE Module for Basesystem 15 SP5, openSUSE Leap 15.5 5.14.21-150500.55.31.1
  • kernel-default SLE Workstation Extension 15 SP5, SLE Module for Legacy 15 SP5, SLE Module for Basesystem 15 SP5 +4 more 5.14.21-150500.55.31.1
  • kernel-kvmsmall openSUSE Leap 15.5 5.14.21-150500.55.31.1
  • kernel-zfcpdump SLE Module for Basesystem 15 SP5, openSUSE Leap 15.5 5.14.21-150500.55.31.1

suse advisories SUSE-SU-2023:4071-1SUSE-SU-2023:4072-2SUSE-SU-2023:4347-1SUSE-SU-2023:4328-1SUSE-SU-2023:4326-1SUSE-SU-2023:4325-1

  • kernel-source openSUSE Tumbleweed 6.5.6-1.1
  • kernel-source openSUSE Tumbleweed 6.6.17-1.1

opensuse advisories openSUSE-SU-2024:13305-1openSUSE-SU-2024:13704-1

  • kernel AlmaLinux 8 4.18.0-513.18.1.el8_9
  • perf AlmaLinux 8 4.18.0-513.18.1.el8_9
  • bpftool AlmaLinux 8 4.18.0-513.18.1.el8_9
  • kernel-core AlmaLinux 8 4.18.0-513.18.1.el8_9
  • kernel-tools AlmaLinux 8 4.18.0-513.18.1.el8_9
  • python3-perf AlmaLinux 8 4.18.0-513.18.1.el8_9
  • kernel-modules AlmaLinux 8 4.18.0-513.18.1.el8_9
  • kernel-zfcpdump AlmaLinux 8 4.18.0-513.18.1.el8_9

almalinux advisories ALSA-2024:0897

  • kernel CBL-Mariner 2.0 5.15.135.1-2

azure linux advisories AZL-31697

Azure Linux vulnerability data, Copyright (c) Microsoft Corporation, from https://github.com/microsoft/AzureLinuxVulnerabilityData via OSV, under the MIT licence; changed: normalised to fixed package versions per release. MIT

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2023-4623 updated cvss 7.8

kernel: net/sched: sch_hfsc UAF

  • Red Hat Enterprise Linux 6 perf, kernel, python-perf, kernel-kdump, kernel-firmware, kernel-bootwrapper, +1 more
    affected: workaround, no fix planned “To mitigate this issue, prevent the module sch_hfsc from being loaded by blacklisting the module to prevent it from loading automatically. ~~~ https://access.redhat.com/solutions/41278 ~~~”
  • Red Hat Enterprise Linux 9 kernel-rt, kernel-rt-kvm, kernel-rt-core, kernel-rt-modules, kernel-rt-debug-kvm, kernel-rt-debug-core, +12 more
    affected: workaround, no fix available “To mitigate this issue, prevent the module sch_hfsc from being loaded by blacklisting the module to prevent it from loading automatically. ~~~ https://access.redhat.com/solutions/41278 ~~~”
  • Red Hat CodeReady Linux Builder (v. 8) kernel-debuginfo-common-x86_64 4.18.0-513.18.1.el8_9, kernel-debuginfo-common-aarch64 4.18.0-513.18.1.el8_9, kernel-debuginfo-common-ppc64le 4.18.0-513.18.1.el8_9
    fixed: vendor fix “To mitigate this issue, prevent the module sch_hfsc from being loaded by blacklisting the module to prevent it from loading automatically. ~~~ https://access.redhat.com/solutions/41278 ~~~” RHSA-2024:0897
  • Red Hat CodeReady Linux Builder (v. 9) libperf 5.14.0-362.18.1.el9_3, kernel-debuginfo-common-s390x 5.14.0-362.18.1.el9_3, kernel-debuginfo-common-x86_64 5.14.0-362.18.1.el9_3, kernel-debuginfo-common-aarch64 5.14.0-362.18.1.el9_3, kernel-debuginfo-common-ppc64le 5.14.0-362.18.1.el9_3
    fixed: vendor fix “To mitigate this issue, prevent the module sch_hfsc from being loaded by blacklisting the module to prevent it from loading automatically. ~~~ https://access.redhat.com/solutions/41278 ~~~” RHSA-2024:0461
  • Red Hat CodeReady Linux Builder EUS (v.8.6) kernel-debuginfo-common-x86_64 4.18.0-372.87.1.el8_6, kernel-debuginfo-common-aarch64 4.18.0-372.87.1.el8_6, kernel-debuginfo-common-ppc64le 4.18.0-372.87.1.el8_6
    fixed: vendor fix “To mitigate this issue, prevent the module sch_hfsc from being loaded by blacklisting the module to prevent it from loading automatically. ~~~ https://access.redhat.com/solutions/41278 ~~~” RHSA-2024:0412
  • Red Hat CodeReady Linux Builder EUS (v.8.8) kernel-debuginfo-common-x86_64 4.18.0-477.43.1.el8_8, kernel-debuginfo-common-aarch64 4.18.0-477.43.1.el8_8, kernel-debuginfo-common-ppc64le 4.18.0-477.43.1.el8_8
    fixed: vendor fix “To mitigate this issue, prevent the module sch_hfsc from being loaded by blacklisting the module to prevent it from loading automatically. ~~~ https://access.redhat.com/solutions/41278 ~~~” RHSA-2024:0575
  • Red Hat CodeReady Linux Builder EUS (v.9.0) kernel-debuginfo-common-s390x 5.14.0-70.85.1.el9_0, kernel-debuginfo-common-x86_64 5.14.0-70.85.1.el9_0, kernel-debuginfo-common-aarch64 5.14.0-70.85.1.el9_0, kernel-debuginfo-common-ppc64le 5.14.0-70.85.1.el9_0
    fixed: vendor fix “To mitigate this issue, prevent the module sch_hfsc from being loaded by blacklisting the module to prevent it from loading automatically. ~~~ https://access.redhat.com/solutions/41278 ~~~” RHSA-2024:0432
  • Red Hat CodeReady Linux Builder EUS (v.9.2) kernel-debuginfo-common-s390x 5.14.0-284.48.1.el9_2, kernel-debuginfo-common-x86_64 5.14.0-284.48.1.el9_2, kernel-debuginfo-common-aarch64 5.14.0-284.48.1.el9_2, kernel-debuginfo-common-ppc64le 5.14.0-284.48.1.el9_2
    fixed: vendor fix “To mitigate this issue, prevent the module sch_hfsc from being loaded by blacklisting the module to prevent it from loading automatically. ~~~ https://access.redhat.com/solutions/41278 ~~~” RHSA-2024:0448
show 29 more
  • Red Hat Enterprise Linux AppStream (v. 9) rv 5.14.0-362.18.1.el9_3, perf 5.14.0-362.18.1.el9_3, rtla 5.14.0-362.18.1.el9_3, kernel-devel-matched 5.14.0-362.18.1.el9_3, kernel-64k-devel-matched 5.14.0-362.18.1.el9_3, kernel-debug-devel-matched 5.14.0-362.18.1.el9_3, +6 more
    fixed: vendor fix “To mitigate this issue, prevent the module sch_hfsc from being loaded by blacklisting the module to prevent it from loading automatically. ~~~ https://access.redhat.com/solutions/41278 ~~~” RHSA-2024:0461
  • Red Hat Enterprise Linux AppStream EUS (v.9.0) perf 5.14.0-70.85.1.el9_0, kernel-devel-matched 5.14.0-70.85.1.el9_0, kernel-debug-devel-matched 5.14.0-70.85.1.el9_0, kernel-debuginfo-common-s390x 5.14.0-70.85.1.el9_0, kernel-zfcpdump-devel-matched 5.14.0-70.85.1.el9_0, kernel-debuginfo-common-x86_64 5.14.0-70.85.1.el9_0, +2 more
    fixed: vendor fix “To mitigate this issue, prevent the module sch_hfsc from being loaded by blacklisting the module to prevent it from loading automatically. ~~~ https://access.redhat.com/solutions/41278 ~~~” RHSA-2024:0432
  • Red Hat Enterprise Linux AppStream EUS (v.9.2) perf 5.14.0-284.48.1.el9_2, rtla 5.14.0-284.48.1.el9_2, kernel-devel-matched 5.14.0-284.48.1.el9_2, kernel-64k-devel-matched 5.14.0-284.48.1.el9_2, kernel-debug-devel-matched 5.14.0-284.48.1.el9_2, kernel-debuginfo-common-s390x 5.14.0-284.48.1.el9_2, +5 more
    fixed: vendor fix “To mitigate this issue, prevent the module sch_hfsc from being loaded by blacklisting the module to prevent it from loading automatically. ~~~ https://access.redhat.com/solutions/41278 ~~~” RHSA-2024:0448
  • Red Hat Enterprise Linux BaseOS (v. 8) perf 4.18.0-513.18.1.el8_9, kernel 4.18.0-513.18.1.el8_9, bpftool 4.18.0-513.18.1.el8_9, kernel-core 4.18.0-513.18.1.el8_9, kernel-tools 4.18.0-513.18.1.el8_9, python3-perf 4.18.0-513.18.1.el8_9, +18 more
    fixed: vendor fix “To mitigate this issue, prevent the module sch_hfsc from being loaded by blacklisting the module to prevent it from loading automatically. ~~~ https://access.redhat.com/solutions/41278 ~~~” RHSA-2024:0897
  • Red Hat Enterprise Linux BaseOS (v. 9) bpftool 7.2.0-362.18.1.el9_3, kernel 5.14.0-362.18.1.el9_3, kernel-64k 5.14.0-362.18.1.el9_3, kernel-core 5.14.0-362.18.1.el9_3, kernel-tools 5.14.0-362.18.1.el9_3, python3-perf 5.14.0-362.18.1.el9_3, +30 more
    fixed: vendor fix “To mitigate this issue, prevent the module sch_hfsc from being loaded by blacklisting the module to prevent it from loading automatically. ~~~ https://access.redhat.com/solutions/41278 ~~~” RHSA-2024:0461
  • Red Hat Enterprise Linux BaseOS AUS (v. 8.2) perf 4.18.0-193.128.1.el8_2, kernel 4.18.0-193.128.1.el8_2, bpftool 4.18.0-193.128.1.el8_2, kernel-core 4.18.0-193.128.1.el8_2, kernel-tools 4.18.0-193.128.1.el8_2, python3-perf 4.18.0-193.128.1.el8_2, +8 more
    fixed: vendor fix “To mitigate this issue, prevent the module sch_hfsc from being loaded by blacklisting the module to prevent it from loading automatically. ~~~ https://access.redhat.com/solutions/41278 ~~~” RHSA-2024:1268
  • Red Hat Enterprise Linux BaseOS AUS (v.8.4) perf 4.18.0-305.120.1.el8_4, kernel 4.18.0-305.120.1.el8_4, bpftool 4.18.0-305.120.1.el8_4, kernel-core 4.18.0-305.120.1.el8_4, kernel-tools 4.18.0-305.120.1.el8_4, python3-perf 4.18.0-305.120.1.el8_4, +8 more
    fixed: vendor fix “To mitigate this issue, prevent the module sch_hfsc from being loaded by blacklisting the module to prevent it from loading automatically. ~~~ https://access.redhat.com/solutions/41278 ~~~” RHSA-2024:0562
  • Red Hat Enterprise Linux BaseOS E4S (v. 8.2) perf 4.18.0-193.128.1.el8_2, kernel 4.18.0-193.128.1.el8_2, bpftool 4.18.0-193.128.1.el8_2, kernel-core 4.18.0-193.128.1.el8_2, kernel-tools 4.18.0-193.128.1.el8_2, python3-perf 4.18.0-193.128.1.el8_2, +13 more
    fixed: vendor fix “To mitigate this issue, prevent the module sch_hfsc from being loaded by blacklisting the module to prevent it from loading automatically. ~~~ https://access.redhat.com/solutions/41278 ~~~” RHSA-2024:1268
  • Red Hat Enterprise Linux BaseOS E4S (v.8.4) perf 4.18.0-305.120.1.el8_4, kernel 4.18.0-305.120.1.el8_4, bpftool 4.18.0-305.120.1.el8_4, kernel-core 4.18.0-305.120.1.el8_4, kernel-tools 4.18.0-305.120.1.el8_4, python3-perf 4.18.0-305.120.1.el8_4, +13 more
    fixed: vendor fix “To mitigate this issue, prevent the module sch_hfsc from being loaded by blacklisting the module to prevent it from loading automatically. ~~~ https://access.redhat.com/solutions/41278 ~~~” RHSA-2024:0562
  • Red Hat Enterprise Linux BaseOS EUS (v.8.6) perf 4.18.0-372.87.1.el8_6, kernel 4.18.0-372.87.1.el8_6, bpftool 4.18.0-372.87.1.el8_6, kernel-core 4.18.0-372.87.1.el8_6, kernel-tools 4.18.0-372.87.1.el8_6, python3-perf 4.18.0-372.87.1.el8_6, +19 more
    fixed: vendor fix “To mitigate this issue, prevent the module sch_hfsc from being loaded by blacklisting the module to prevent it from loading automatically. ~~~ https://access.redhat.com/solutions/41278 ~~~” RHSA-2024:0412
  • Red Hat Enterprise Linux BaseOS EUS (v.8.8) perf 4.18.0-477.43.1.el8_8, kernel 4.18.0-477.43.1.el8_8, bpftool 4.18.0-477.43.1.el8_8, kernel-core 4.18.0-477.43.1.el8_8, kernel-tools 4.18.0-477.43.1.el8_8, python3-perf 4.18.0-477.43.1.el8_8, +18 more
    fixed: vendor fix “To mitigate this issue, prevent the module sch_hfsc from being loaded by blacklisting the module to prevent it from loading automatically. ~~~ https://access.redhat.com/solutions/41278 ~~~” RHSA-2024:0575
  • Red Hat Enterprise Linux BaseOS EUS (v.9.0) kernel 5.14.0-70.85.1.el9_0, bpftool 5.14.0-70.85.1.el9_0, kernel-core 5.14.0-70.85.1.el9_0, kernel-tools 5.14.0-70.85.1.el9_0, python3-perf 5.14.0-70.85.1.el9_0, kernel-modules 5.14.0-70.85.1.el9_0, +18 more
    fixed: vendor fix “To mitigate this issue, prevent the module sch_hfsc from being loaded by blacklisting the module to prevent it from loading automatically. ~~~ https://access.redhat.com/solutions/41278 ~~~” RHSA-2024:0432
  • Red Hat Enterprise Linux BaseOS EUS (v.9.2) bpftool 7.0.0-284.48.1.el9_2, kernel 5.14.0-284.48.1.el9_2, kernel-64k 5.14.0-284.48.1.el9_2, kernel-core 5.14.0-284.48.1.el9_2, kernel-tools 5.14.0-284.48.1.el9_2, python3-perf 5.14.0-284.48.1.el9_2, +32 more
    fixed: vendor fix “To mitigate this issue, prevent the module sch_hfsc from being loaded by blacklisting the module to prevent it from loading automatically. ~~~ https://access.redhat.com/solutions/41278 ~~~” RHSA-2024:0448
  • Red Hat Enterprise Linux BaseOS TUS (v. 8.2) perf 4.18.0-193.128.1.el8_2, kernel 4.18.0-193.128.1.el8_2, bpftool 4.18.0-193.128.1.el8_2, kernel-core 4.18.0-193.128.1.el8_2, kernel-tools 4.18.0-193.128.1.el8_2, python3-perf 4.18.0-193.128.1.el8_2, +8 more
    fixed: vendor fix “To mitigate this issue, prevent the module sch_hfsc from being loaded by blacklisting the module to prevent it from loading automatically. ~~~ https://access.redhat.com/solutions/41278 ~~~” RHSA-2024:1268
  • Red Hat Enterprise Linux BaseOS TUS (v.8.4) perf 4.18.0-305.120.1.el8_4, kernel 4.18.0-305.120.1.el8_4, bpftool 4.18.0-305.120.1.el8_4, kernel-core 4.18.0-305.120.1.el8_4, kernel-tools 4.18.0-305.120.1.el8_4, python3-perf 4.18.0-305.120.1.el8_4, +8 more
    fixed: vendor fix “To mitigate this issue, prevent the module sch_hfsc from being loaded by blacklisting the module to prevent it from loading automatically. ~~~ https://access.redhat.com/solutions/41278 ~~~” RHSA-2024:0562
  • Red Hat Enterprise Linux Client (v. 7) perf 3.10.0-1160.118.1.el7, kernel 3.10.0-1160.118.1.el7, bpftool 3.10.0-1160.118.1.el7, python-perf 3.10.0-1160.118.1.el7, kernel-tools 3.10.0-1160.118.1.el7, kernel-tools-libs 3.10.0-1160.118.1.el7, +2 more Red Hat Enterprise Linux Client Optional (v. 7) kernel-debuginfo-common-x86_64 3.10.0-1160.118.1.el7 Red Hat Enterprise Linux ComputeNode Optional (v. 7) kernel-debuginfo-common-x86_64 3.10.0-1160.118.1.el7
    fixed: vendor fix “To mitigate this issue, prevent the module sch_hfsc from being loaded by blacklisting the module to prevent it from loading automatically. ~~~ https://access.redhat.com/solutions/41278 ~~~” RHSA-2024:2004
  • Red Hat Enterprise Linux for Real Time (v. 7) kernel-rt 3.10.0-1160.118.1.rt56.1269.el7, kernel-rt-trace 3.10.0-1160.118.1.rt56.1269.el7, kernel-rt-debuginfo-common-x86_64 3.10.0-1160.118.1.rt56.1269.el7
    fixed: vendor fix “To mitigate this issue, prevent the module sch_hfsc from being loaded by blacklisting the module to prevent it from loading automatically. ~~~ https://access.redhat.com/solutions/41278 ~~~” RHSA-2024:2003
  • Red Hat Enterprise Linux for Real Time (v. 8) kernel-rt 4.18.0-513.18.1.rt7.320.el8_9, kernel-rt-core 4.18.0-513.18.1.rt7.320.el8_9, kernel-rt-modules 4.18.0-513.18.1.rt7.320.el8_9, kernel-rt-debug-core 4.18.0-513.18.1.rt7.320.el8_9, kernel-rt-debug-modules 4.18.0-513.18.1.rt7.320.el8_9, kernel-rt-modules-extra 4.18.0-513.18.1.rt7.320.el8_9, +2 more
    fixed: vendor fix “To mitigate this issue, prevent the module sch_hfsc from being loaded by blacklisting the module to prevent it from loading automatically. ~~~ https://access.redhat.com/solutions/41278 ~~~” RHSA-2024:0881
  • Red Hat Enterprise Linux for Real Time for NFV (v. 7) kernel-rt 3.10.0-1160.118.1.rt56.1269.el7, kernel-rt-kvm 3.10.0-1160.118.1.rt56.1269.el7, kernel-rt-trace 3.10.0-1160.118.1.rt56.1269.el7, kernel-rt-debug-kvm 3.10.0-1160.118.1.rt56.1269.el7, kernel-rt-trace-kvm 3.10.0-1160.118.1.rt56.1269.el7, kernel-rt-debuginfo-common-x86_64 3.10.0-1160.118.1.rt56.1269.el7
    fixed: vendor fix “To mitigate this issue, prevent the module sch_hfsc from being loaded by blacklisting the module to prevent it from loading automatically. ~~~ https://access.redhat.com/solutions/41278 ~~~” RHSA-2024:2003
  • Red Hat Enterprise Linux NFV TUS (v.8.4) kernel-rt 4.18.0-305.120.1.rt7.196.el8_4, kernel-rt-kvm 4.18.0-305.120.1.rt7.196.el8_4, kernel-rt-core 4.18.0-305.120.1.rt7.196.el8_4, kernel-rt-modules 4.18.0-305.120.1.rt7.196.el8_4, kernel-rt-debug-kvm 4.18.0-305.120.1.rt7.196.el8_4, kernel-rt-debug-core 4.18.0-305.120.1.rt7.196.el8_4, +4 more
    fixed: vendor fix “To mitigate this issue, prevent the module sch_hfsc from being loaded by blacklisting the module to prevent it from loading automatically. ~~~ https://access.redhat.com/solutions/41278 ~~~” RHSA-2024:0563
  • Red Hat Enterprise Linux Real Time (v. 9) kernel-rt 5.14.0-362.18.1.el9_3, kernel-rt-core 5.14.0-362.18.1.el9_3, kernel-rt-modules 5.14.0-362.18.1.el9_3, kernel-rt-debug-core 5.14.0-362.18.1.el9_3, kernel-rt-modules-core 5.14.0-362.18.1.el9_3, kernel-rt-debug-modules 5.14.0-362.18.1.el9_3, +4 more
    fixed: vendor fix “To mitigate this issue, prevent the module sch_hfsc from being loaded by blacklisting the module to prevent it from loading automatically. ~~~ https://access.redhat.com/solutions/41278 ~~~” RHSA-2024:0461
  • Red Hat Enterprise Linux Real Time EUS (v.9.0) kernel-rt 5.14.0-70.85.1.rt21.156.el9_0, kernel-rt-core 5.14.0-70.85.1.rt21.156.el9_0, kernel-rt-modules 5.14.0-70.85.1.rt21.156.el9_0, kernel-rt-debug-core 5.14.0-70.85.1.rt21.156.el9_0, kernel-rt-debug-modules 5.14.0-70.85.1.rt21.156.el9_0, kernel-rt-modules-extra 5.14.0-70.85.1.rt21.156.el9_0, +2 more
    fixed: vendor fix “To mitigate this issue, prevent the module sch_hfsc from being loaded by blacklisting the module to prevent it from loading automatically. ~~~ https://access.redhat.com/solutions/41278 ~~~” RHSA-2024:0431
  • Red Hat Enterprise Linux Real Time EUS (v.9.2) kernel-rt 5.14.0-284.48.1.rt14.333.el9_2, kernel-rt-core 5.14.0-284.48.1.rt14.333.el9_2, kernel-rt-modules 5.14.0-284.48.1.rt14.333.el9_2, kernel-rt-debug-core 5.14.0-284.48.1.rt14.333.el9_2, kernel-rt-modules-core 5.14.0-284.48.1.rt14.333.el9_2, kernel-rt-debug-modules 5.14.0-284.48.1.rt14.333.el9_2, +4 more
    fixed: vendor fix “To mitigate this issue, prevent the module sch_hfsc from being loaded by blacklisting the module to prevent it from loading automatically. ~~~ https://access.redhat.com/solutions/41278 ~~~” RHSA-2024:0439
  • Red Hat Enterprise Linux Real Time for NFV (v. 8) kernel-rt 4.18.0-513.18.1.rt7.320.el8_9, kernel-rt-kvm 4.18.0-513.18.1.rt7.320.el8_9, kernel-rt-core 4.18.0-513.18.1.rt7.320.el8_9, kernel-rt-modules 4.18.0-513.18.1.rt7.320.el8_9, kernel-rt-debug-kvm 4.18.0-513.18.1.rt7.320.el8_9, kernel-rt-debug-core 4.18.0-513.18.1.rt7.320.el8_9, +4 more
    fixed: vendor fix “To mitigate this issue, prevent the module sch_hfsc from being loaded by blacklisting the module to prevent it from loading automatically. ~~~ https://access.redhat.com/solutions/41278 ~~~” RHSA-2024:0881
  • Red Hat Enterprise Linux Real Time for NFV (v. 9) kernel-rt 5.14.0-362.18.1.el9_3, kernel-rt-kvm 5.14.0-362.18.1.el9_3, kernel-rt-core 5.14.0-362.18.1.el9_3, kernel-rt-modules 5.14.0-362.18.1.el9_3, kernel-rt-debug-kvm 5.14.0-362.18.1.el9_3, kernel-rt-debug-core 5.14.0-362.18.1.el9_3, +6 more
    fixed: vendor fix “To mitigate this issue, prevent the module sch_hfsc from being loaded by blacklisting the module to prevent it from loading automatically. ~~~ https://access.redhat.com/solutions/41278 ~~~” RHSA-2024:0461
  • Red Hat Enterprise Linux Real Time for NFV EUS (v.9.0) kernel-rt 5.14.0-70.85.1.rt21.156.el9_0, kernel-rt-kvm 5.14.0-70.85.1.rt21.156.el9_0, kernel-rt-core 5.14.0-70.85.1.rt21.156.el9_0, kernel-rt-modules 5.14.0-70.85.1.rt21.156.el9_0, kernel-rt-debug-kvm 5.14.0-70.85.1.rt21.156.el9_0, kernel-rt-debug-core 5.14.0-70.85.1.rt21.156.el9_0, +4 more
    fixed: vendor fix “To mitigate this issue, prevent the module sch_hfsc from being loaded by blacklisting the module to prevent it from loading automatically. ~~~ https://access.redhat.com/solutions/41278 ~~~” RHSA-2024:0431
  • Red Hat Enterprise Linux Real Time for NFV EUS (v.9.2) kernel-rt 5.14.0-284.48.1.rt14.333.el9_2, kernel-rt-kvm 5.14.0-284.48.1.rt14.333.el9_2, kernel-rt-core 5.14.0-284.48.1.rt14.333.el9_2, kernel-rt-modules 5.14.0-284.48.1.rt14.333.el9_2, kernel-rt-debug-kvm 5.14.0-284.48.1.rt14.333.el9_2, kernel-rt-debug-core 5.14.0-284.48.1.rt14.333.el9_2, +6 more
    fixed: vendor fix “To mitigate this issue, prevent the module sch_hfsc from being loaded by blacklisting the module to prevent it from loading automatically. ~~~ https://access.redhat.com/solutions/41278 ~~~” RHSA-2024:0439
  • Red Hat Enterprise Linux Real Time for NFV TUS (v. 8.2) kernel-rt 4.18.0-193.128.1.rt13.179.el8_2, kernel-rt-kvm 4.18.0-193.128.1.rt13.179.el8_2, kernel-rt-core 4.18.0-193.128.1.rt13.179.el8_2, kernel-rt-modules 4.18.0-193.128.1.rt13.179.el8_2, kernel-rt-debug-kvm 4.18.0-193.128.1.rt13.179.el8_2, kernel-rt-debug-core 4.18.0-193.128.1.rt13.179.el8_2, +4 more Red Hat Enterprise Linux Real Time TUS (v. 8.2) kernel-rt 4.18.0-193.128.1.rt13.179.el8_2, kernel-rt-core 4.18.0-193.128.1.rt13.179.el8_2, kernel-rt-modules 4.18.0-193.128.1.rt13.179.el8_2, kernel-rt-debug-core 4.18.0-193.128.1.rt13.179.el8_2, kernel-rt-debug-modules 4.18.0-193.128.1.rt13.179.el8_2, kernel-rt-modules-extra 4.18.0-193.128.1.rt13.179.el8_2, +2 more
    fixed: vendor fix “To mitigate this issue, prevent the module sch_hfsc from being loaded by blacklisting the module to prevent it from loading automatically. ~~~ https://access.redhat.com/solutions/41278 ~~~” RHSA-2024:1269
  • Red Hat Enterprise Linux RT TUS (v.8.4) kernel-rt 4.18.0-305.120.1.rt7.196.el8_4, kernel-rt-core 4.18.0-305.120.1.rt7.196.el8_4, kernel-rt-modules 4.18.0-305.120.1.rt7.196.el8_4, kernel-rt-debug-core 4.18.0-305.120.1.rt7.196.el8_4, kernel-rt-debug-modules 4.18.0-305.120.1.rt7.196.el8_4, kernel-rt-modules-extra 4.18.0-305.120.1.rt7.196.el8_4, +2 more
    fixed: vendor fix “To mitigate this issue, prevent the module sch_hfsc from being loaded by blacklisting the module to prevent it from loading automatically. ~~~ https://access.redhat.com/solutions/41278 ~~~” RHSA-2024:0563

9 more fixed, 1 more not affected in the full advisory

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

cisa ICSA-23-348-10 updated cvss 7.8

Siemens SIMATIC S7-1500

  • Siemens SIMATIC S7-1500 CPU 1518-4 PN/DP MFP (6ES7518-4AX00-1AB0) >= 3.1.0, < 3.1.5 Siemens SIMATIC S7-1500 CPU 1518-4 PN/DP MFP (6ES7518-4AX00-1AC0) >= 3.1.0, < 3.1.5 Siemens SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP (6ES7518-4FX00-1AB0) >= 3.1.0, < 3.1.5 Siemens SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP (6ES7518-4FX00-1AC0) >= 3.1.0, < 3.1.5 Siemens SIPLUS S7-1500 CPU 1518-4 PN/DP MFP (6AG1518-4AX00-4AC0) >= 3.1.0, < 3.1.5
    affected: fixed in V3.1.5, mitigation support.industry.siemens.com

Facts from CISA's republication of the vendor's own advisory (CSAF); the linked advisory is the authoritative source. CISA notification · csaf

cisa ICSA-25-044-09 updated cvss 7.8

Siemens SCALANCE W700 IEEE 802.11ax

  • Siemens SCALANCE WAB762-1 (6GK5762-1AJ00-6AA0) <V3.0.0 Siemens SCALANCE WAM763-1 (6GK5763-1AL00-7DA0) <V3.0.0 Siemens SCALANCE WAM763-1 (ME) (6GK5763-1AL00-7DC0) <V3.0.0 Siemens SCALANCE WAM763-1 (US) (6GK5763-1AL00-7DB0) <V3.0.0 Siemens SCALANCE WAM766-1 (6GK5766-1GE00-7DA0) <V3.0.0 Siemens SCALANCE WAM766-1 (ME) (6GK5766-1GE00-7DC0) <V3.0.0
    +13 more products
    Siemens SCALANCE WAM766-1 (US) (6GK5766-1GE00-7DB0) <V3.0.0 Siemens SCALANCE WAM766-1 EEC (6GK5766-1GE00-7TA0) <V3.0.0 Siemens SCALANCE WAM766-1 EEC (ME) (6GK5766-1GE00-7TC0) <V3.0.0 Siemens SCALANCE WAM766-1 EEC (US) (6GK5766-1GE00-7TB0) <V3.0.0 Siemens SCALANCE WUB762-1 (6GK5762-1AJ00-1AA0) <V3.0.0 Siemens SCALANCE WUB762-1 iFeatures (6GK5762-1AJ00-2AA0) <V3.0.0 Siemens SCALANCE WUM763-1 (6GK5763-1AL00-3AA0) <V3.0.0 Siemens SCALANCE WUM763-1 (6GK5763-1AL00-3DA0) <V3.0.0 Siemens SCALANCE WUM763-1 (US) (6GK5763-1AL00-3AB0) <V3.0.0 Siemens SCALANCE WUM763-1 (US) (6GK5763-1AL00-3DB0) <V3.0.0 Siemens SCALANCE WUM766-1 (6GK5766-1GE00-3DA0) <V3.0.0 Siemens SCALANCE WUM766-1 (ME) (6GK5766-1GE00-3DC0) <V3.0.0 Siemens SCALANCE WUM766-1 (USA) (6GK5766-1GE00-3DB0) <V3.0.0
    affected: fixed in V3.0.0 support.industry.siemens.com

Facts from CISA's republication of the vendor's own advisory (CSAF); the linked advisory is the authoritative source. CISA notification · csaf

cisa ICSA-23-166-11 updated cvss 7.8

Siemens SIMATIC S7-1500 TM MFP Linux Kernel

Facts from CISA's republication of the vendor's own advisory (CSAF); the linked advisory is the authoritative source. CISA notification · csaf

CISA SSVC

Exploitation
none
Automatable
no
Technical impact
total
Assessed
20 mo ago

Exploit prediction

0.28% chance of exploitation in the next 30 days, higher than 20% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CNA 3.1 7.8 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
NVD 3.1 7.8 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Affected products

  • Linux Kernel
  • Siemens SIMATIC S7-1500 CPU 1518-4 PN/DP MFP
  • Siemens SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP
  • Siemens SIMATIC S7-1500 TM MFP - GNU/Linux subsystem
  • Siemens SIPLUS S7-1500 CPU 1518-4 PN/DP MFP

Classification

Weakness
Technology feeds

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.