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Fencer Vulns
critical 9.8

CVE-2026-53002 in the critical feed json

netfilter: conntrack: remove sprintf usage

published 2026-06-24 4 mo ago modified 2026-10-19 20 d ago also EUVD-2026-38870

cvss
9.8
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.4%
EPSS 0.4% chance of exploitation in 30 days, percentile 30%
public exploits
0
none known

Summary

In the Linux kernel, the following vulnerability has been resolved:

netfilter: conntrack: remove sprintf usage

Replace it with scnprintf, the buffer sizes are expected to be large enough to hold the result, no need for snprintf+overflow check.

Increase buffer size in mangle_content_len() while at it.

BUG: KASAN: stack-out-of-bounds in vsnprintf+0xea5/0x1270 Write of size 1 at addr [..] vsnprintf+0xea5/0x1270 sprintf+0xb1/0xe0 mangle_content_len+0x1ac/0x280 nf_nat_sdp_session+0x1cc/0x240 process_sdp+0x8f8/0xb80 process_invite_request+0x108/0x2b0 process_sip_msg+0x5da/0xf50 sip_help_tcp+0x45e/0x780 nf_confirm+0x34d/0x990 [..]

Patch / fix

  • Linux Linux 5.10.258, 5.15.209, 6.1.175, 6.6.141, 6.12.91, 6.18.33, 7.0.10, 7.1
  • Red Hat Red Hat Enterprise Linux 8 0:4.18.0-553.160.1.el8_10, 0:4.18.0-553.160.1.rt7.501.el8_10
  • Red Hat Red Hat Enterprise Linux 9 0:5.14.0-687.46.1.el9_8
  • linux Debian 12 6.1.176-1
  • linux Debian 13 6.12.94-1
  • linux Debian 14 7.0.10-1

debian advisories DEBIAN-CVE-2026-53002

  • linux Ubuntu 22.04 LTS 5.15.0-186.196
  • linux Ubuntu 24.04 LTS 6.8.0-136.136
  • linux Ubuntu 26.04 LTS 7.0.0-28.28
  • linux-aws Ubuntu 22.04 LTS 5.15.0-1112.119
  • linux-aws Ubuntu 24.04 LTS 6.8.0-1061.64
  • linux-aws Ubuntu 26.04 LTS 7.0.0-1009.9
  • linux-gcp Ubuntu 22.04 LTS 5.15.0-1112.122
  • linux-gcp Ubuntu 24.04 LTS 6.8.0-1064.72

ubuntu advisories UBUNTU-CVE-2026-53002

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 5.14.0-687.46.1.el9_8
  • rv RHEL 9 5.14.0-687.46.1.el9_8
  • perf RHEL 9 5.14.0-687.46.1.el9_8
  • rtla RHEL 9 5.14.0-687.46.1.el9_8
  • libperf RHEL 9 5.14.0-687.46.1.el9_8
  • kernel-rt RHEL 9 5.14.0-687.46.1.el9_8
  • kernel-64k RHEL 9 5.14.0-687.46.1.el9_8
  • kernel-core RHEL 9 5.14.0-687.46.1.el9_8

red hat advisories RHSA-2026:81371RHSA-2026:81349RHSA-2026:77214RHSA-2026:77215RHSA-2026:74174RHSA-2026:73645

  • kernel-rt Real Time Module 15 SP7 6.4.0-150700.7.72.1
  • kernel-syms-rt Real Time Module 15 SP7 6.4.0-150700.7.72.1
  • kernel-source-rt Real Time Module 15 SP7 6.4.0-150700.7.72.1
  • kernel-64kb SLE Module for Basesystem 15 SP7 6.4.0-150700.53.78.1
  • kernel-syms SLE Module for Development Tools 15 SP7 6.4.0-150700.53.78.1
  • kernel-azure SLE Module for Public Cloud 15 SP7 6.4.0-150700.53.78.1
  • kernel-source SLE Module for Development Tools 15 SP7, SLE Module for Basesystem 15 SP7 6.4.0-150700.53.78.1
  • kernel-default SLE Workstation Extension 15 SP7, SLE Module for Legacy 15 SP7, SLE Module for Basesystem 15 SP7 +2 more 6.4.0-150700.53.78.1

suse advisories SUSE-SU-2026:3810-1SUSE-SU-2026:3790-1SUSE-SU-2026:23244-1SUSE-SU-2026:23241-1SUSE-SU-2026:23194-1SUSE-SU-2026:23193-1

  • kernel-rt openSUSE Leap 16.0 6.12.0-160000.37.1
  • dtb-aarch64 openSUSE Leap 16.0 6.12.0-160000.37.1
  • kernel-64kb openSUSE Leap 16.0 6.12.0-160000.37.1
  • kernel-syms openSUSE Leap 16.0 6.12.0-160000.37.1
  • kernel-azure openSUSE Leap 16.0 6.12.0-160000.37.1
  • kernel-obs-qa openSUSE Leap 16.0 6.12.0-160000.37.1
  • kernel-source openSUSE Leap 16.0 6.12.0-160000.37.1
  • kernel-default openSUSE Leap 16.0 6.12.0-160000.37.1

opensuse advisories openSUSE-SU-2026:21555-1

  • kernel AlmaLinux 8 4.18.0-553.160.1.el8_10
  • perf AlmaLinux 8 4.18.0-553.160.1.el8_10
  • bpftool AlmaLinux 8 4.18.0-553.160.1.el8_10
  • kernel-core AlmaLinux 8 4.18.0-553.160.1.el8_10
  • kernel-tools AlmaLinux 8 4.18.0-553.160.1.el8_10
  • python3-perf AlmaLinux 8 4.18.0-553.160.1.el8_10
  • kernel-modules AlmaLinux 8 4.18.0-553.160.1.el8_10
  • kernel-zfcpdump AlmaLinux 8 4.18.0-553.160.1.el8_10

almalinux advisories ALSA-2026:66000ALSA-2026:66180ALSA-2026:64770

  • kernel Rocky Linux 9 5.14.0-687.46.1.el9_8
  • kernel-rt Rocky Linux 8 4.18.0-553.160.1.rt7.501.el8_10

rocky linux advisories RLSA-2026:66180RLSA-2026:64770

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-2026-53002 updated cvss 7.0

kernel: netfilter: conntrack: remove sprintf usage

  • 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 Red Hat Enterprise Linux 10 kernel
    affected: workaround, no fix available “To mitigate this issue, prevent the nf_conntrack_sip and nf_nat_sip modules from being loaded. See https://access.redhat.com/solutions/41278 for instructions.”
  • Red Hat CodeReady Linux Builder EUS (v.9.6) libperf 5.14.0-570.146.1.el9_6, kernel-debuginfo-common-s390x 5.14.0-570.146.1.el9_6, kernel-debuginfo-common-x86_64 5.14.0-570.146.1.el9_6, kernel-debuginfo-common-aarch64 5.14.0-570.146.1.el9_6, kernel-debuginfo-common-ppc64le 5.14.0-570.146.1.el9_6
    fixed: vendor fix “To mitigate this issue, prevent the nf_conntrack_sip and nf_nat_sip modules from being loaded. See https://access.redhat.com/solutions/41278 for instructions.” RHSA-2026:74174
  • Red Hat Enterprise Linux AppStream (v. 9) rv 5.14.0-687.46.1.el9_8, perf 5.14.0-687.46.1.el9_8, rtla 5.14.0-687.46.1.el9_8, python3-perf 5.14.0-687.46.1.el9_8, kernel-devel-matched 5.14.0-687.46.1.el9_8, kernel-64k-devel-matched 5.14.0-687.46.1.el9_8, +7 more
    fixed: vendor fix “To mitigate this issue, prevent the nf_conntrack_sip and nf_nat_sip modules from being loaded. See https://access.redhat.com/solutions/41278 for instructions.” RHSA-2026:66180
  • Red Hat Enterprise Linux AppStream E4S (v.9.2) perf 5.14.0-284.195.1.el9_2, rtla 5.14.0-284.195.1.el9_2, kernel-devel-matched 5.14.0-284.195.1.el9_2, kernel-64k-devel-matched 5.14.0-284.195.1.el9_2, kernel-debug-devel-matched 5.14.0-284.195.1.el9_2, kernel-debuginfo-common-s390x 5.14.0-284.195.1.el9_2, +5 more
    fixed: vendor fix “To mitigate this issue, prevent the nf_conntrack_sip and nf_nat_sip modules from being loaded. See https://access.redhat.com/solutions/41278 for instructions.” RHSA-2026:77215
  • Red Hat Enterprise Linux AppStream E4S (v.9.4) rv 5.14.0-427.153.1.el9_4, perf 5.14.0-427.153.1.el9_4, rtla 5.14.0-427.153.1.el9_4, kernel-devel-matched 5.14.0-427.153.1.el9_4, kernel-64k-devel-matched 5.14.0-427.153.1.el9_4, kernel-debug-devel-matched 5.14.0-427.153.1.el9_4, +6 more
    fixed: vendor fix “To mitigate this issue, prevent the nf_conntrack_sip and nf_nat_sip modules from being loaded. See https://access.redhat.com/solutions/41278 for instructions.” RHSA-2026:73645
  • Red Hat Enterprise Linux AppStream EUS (v. 10.0) rv 6.12.0-55.105.1.el10_0, perf 6.12.0-55.105.1.el10_0, rtla 6.12.0-55.105.1.el10_0, python3-perf 6.12.0-55.105.1.el10_0, kernel-devel-matched 6.12.0-55.105.1.el10_0, kernel-64k-devel-matched 6.12.0-55.105.1.el10_0, +7 more
    fixed: vendor fix “To mitigate this issue, prevent the nf_conntrack_sip and nf_nat_sip modules from being loaded. See https://access.redhat.com/solutions/41278 for instructions.” RHSA-2026:69089
  • Red Hat Enterprise Linux AppStream EUS (v.9.6) rv 5.14.0-570.146.1.el9_6, perf 5.14.0-570.146.1.el9_6, rtla 5.14.0-570.146.1.el9_6, python3-perf 5.14.0-570.146.1.el9_6, kernel-devel-matched 5.14.0-570.146.1.el9_6, kernel-64k-devel-matched 5.14.0-570.146.1.el9_6, +7 more
    fixed: vendor fix “To mitigate this issue, prevent the nf_conntrack_sip and nf_nat_sip modules from being loaded. See https://access.redhat.com/solutions/41278 for instructions.” RHSA-2026:74174
  • Red Hat Enterprise Linux BaseOS (v. 8) perf 4.18.0-553.160.1.el8_10, kernel 4.18.0-553.160.1.el8_10, bpftool 4.18.0-553.160.1.el8_10, kernel-core 4.18.0-553.160.1.el8_10, kernel-tools 4.18.0-553.160.1.el8_10, python3-perf 4.18.0-553.160.1.el8_10, +15 more
    fixed: vendor fix “To mitigate this issue, prevent the nf_conntrack_sip and nf_nat_sip modules from being loaded. See https://access.redhat.com/solutions/41278 for instructions.” RHSA-2026:66000
show 29 more
  • Red Hat Enterprise Linux BaseOS (v. 9) kernel 5.14.0-687.46.1.el9_8, kernel-64k 5.14.0-687.46.1.el9_8, kernel-core 5.14.0-687.46.1.el9_8, kernel-tools 5.14.0-687.46.1.el9_8, kernel-modules 5.14.0-687.46.1.el9_8, kernel-64k-core 5.14.0-687.46.1.el9_8, +27 more
    fixed: vendor fix “To mitigate this issue, prevent the nf_conntrack_sip and nf_nat_sip modules from being loaded. See https://access.redhat.com/solutions/41278 for instructions.” RHSA-2026:66180
  • Red Hat Enterprise Linux BaseOS AUS (v.8.4) perf 4.18.0-305.208.1.el8_4, kernel 4.18.0-305.208.1.el8_4, bpftool 4.18.0-305.208.1.el8_4, kernel-core 4.18.0-305.208.1.el8_4, kernel-tools 4.18.0-305.208.1.el8_4, python3-perf 4.18.0-305.208.1.el8_4, +8 more
    fixed: vendor fix “To mitigate this issue, prevent the nf_conntrack_sip and nf_nat_sip modules from being loaded. See https://access.redhat.com/solutions/41278 for instructions.” RHSA-2026:69874
  • Red Hat Enterprise Linux BaseOS AUS (v.8.6) perf 4.18.0-372.216.1.el8_6, kernel 4.18.0-372.216.1.el8_6, bpftool 4.18.0-372.216.1.el8_6, kernel-core 4.18.0-372.216.1.el8_6, kernel-tools 4.18.0-372.216.1.el8_6, python3-perf 4.18.0-372.216.1.el8_6, +8 more
    fixed: vendor fix “To mitigate this issue, prevent the nf_conntrack_sip and nf_nat_sip modules from being loaded. See https://access.redhat.com/solutions/41278 for instructions.” RHSA-2026:69906
  • Red Hat Enterprise Linux BaseOS E4S (v.8.8) perf 4.18.0-477.168.1.el8_8, kernel 4.18.0-477.168.1.el8_8, bpftool 4.18.0-477.168.1.el8_8, kernel-core 4.18.0-477.168.1.el8_8, kernel-tools 4.18.0-477.168.1.el8_8, python3-perf 4.18.0-477.168.1.el8_8, +9 more
    fixed: vendor fix “To mitigate this issue, prevent the nf_conntrack_sip and nf_nat_sip modules from being loaded. See https://access.redhat.com/solutions/41278 for instructions.” RHSA-2026:69837
  • Red Hat Enterprise Linux BaseOS E4S (v.9.2) bpftool 7.0.0-284.195.1.el9_2, kernel 5.14.0-284.195.1.el9_2, kernel-64k 5.14.0-284.195.1.el9_2, kernel-core 5.14.0-284.195.1.el9_2, kernel-tools 5.14.0-284.195.1.el9_2, python3-perf 5.14.0-284.195.1.el9_2, +28 more
    fixed: vendor fix “To mitigate this issue, prevent the nf_conntrack_sip and nf_nat_sip modules from being loaded. See https://access.redhat.com/solutions/41278 for instructions.” RHSA-2026:77215
  • Red Hat Enterprise Linux BaseOS E4S (v.9.4) bpftool 7.3.0-427.153.1.el9_4, kernel 5.14.0-427.153.1.el9_4, kernel-64k 5.14.0-427.153.1.el9_4, kernel-core 5.14.0-427.153.1.el9_4, kernel-tools 5.14.0-427.153.1.el9_4, python3-perf 5.14.0-427.153.1.el9_4, +28 more
    fixed: vendor fix “To mitigate this issue, prevent the nf_conntrack_sip and nf_nat_sip modules from being loaded. See https://access.redhat.com/solutions/41278 for instructions.” RHSA-2026:73645
  • Red Hat Enterprise Linux BaseOS EUS (v. 10.0) kernel 6.12.0-55.105.1.el10_0, kernel-64k 6.12.0-55.105.1.el10_0, kernel-core 6.12.0-55.105.1.el10_0, kernel-tools 6.12.0-55.105.1.el10_0, kernel-modules 6.12.0-55.105.1.el10_0, kernel-64k-core 6.12.0-55.105.1.el10_0, +27 more
    fixed: vendor fix “To mitigate this issue, prevent the nf_conntrack_sip and nf_nat_sip modules from being loaded. See https://access.redhat.com/solutions/41278 for instructions.” RHSA-2026:69089
  • Red Hat Enterprise Linux BaseOS EUS (v.9.6) kernel 5.14.0-570.146.1.el9_6, kernel-64k 5.14.0-570.146.1.el9_6, kernel-core 5.14.0-570.146.1.el9_6, kernel-tools 5.14.0-570.146.1.el9_6, kernel-modules 5.14.0-570.146.1.el9_6, kernel-64k-core 5.14.0-570.146.1.el9_6, +27 more
    fixed: vendor fix “To mitigate this issue, prevent the nf_conntrack_sip and nf_nat_sip modules from being loaded. See https://access.redhat.com/solutions/41278 for instructions.” RHSA-2026:74174
  • Red Hat Enterprise Linux BaseOS EUS EXTENSION (v.8.4) perf 4.18.0-305.208.1.el8_4, kernel 4.18.0-305.208.1.el8_4, bpftool 4.18.0-305.208.1.el8_4, kernel-core 4.18.0-305.208.1.el8_4, kernel-tools 4.18.0-305.208.1.el8_4, python3-perf 4.18.0-305.208.1.el8_4, +15 more
    fixed: vendor fix “To mitigate this issue, prevent the nf_conntrack_sip and nf_nat_sip modules from being loaded. See https://access.redhat.com/solutions/41278 for instructions.” RHSA-2026:69874
  • Red Hat Enterprise Linux BaseOS EUS EXTENSION (v.8.6) perf 4.18.0-372.216.1.el8_6, kernel 4.18.0-372.216.1.el8_6, bpftool 4.18.0-372.216.1.el8_6, kernel-core 4.18.0-372.216.1.el8_6, kernel-tools 4.18.0-372.216.1.el8_6, python3-perf 4.18.0-372.216.1.el8_6, +15 more
    fixed: vendor fix “To mitigate this issue, prevent the nf_conntrack_sip and nf_nat_sip modules from being loaded. See https://access.redhat.com/solutions/41278 for instructions.” RHSA-2026:69906
  • Red Hat Enterprise Linux BaseOS TUS (v.8.8) perf 4.18.0-477.168.1.el8_8, kernel 4.18.0-477.168.1.el8_8, bpftool 4.18.0-477.168.1.el8_8, kernel-core 4.18.0-477.168.1.el8_8, kernel-tools 4.18.0-477.168.1.el8_8, python3-perf 4.18.0-477.168.1.el8_8, +8 more
    fixed: vendor fix “To mitigate this issue, prevent the nf_conntrack_sip and nf_nat_sip modules from being loaded. See https://access.redhat.com/solutions/41278 for instructions.” RHSA-2026:69837
  • Red Hat Enterprise Linux CodeReady Linux Builder (v. 9) libperf 5.14.0-687.46.1.el9_8, kernel-debuginfo-common-s390x 5.14.0-687.46.1.el9_8, kernel-debuginfo-common-x86_64 5.14.0-687.46.1.el9_8, kernel-debuginfo-common-aarch64 5.14.0-687.46.1.el9_8, kernel-debuginfo-common-ppc64le 5.14.0-687.46.1.el9_8
    fixed: vendor fix “To mitigate this issue, prevent the nf_conntrack_sip and nf_nat_sip modules from being loaded. See https://access.redhat.com/solutions/41278 for instructions.” RHSA-2026:66180
  • Red Hat Enterprise Linux CodeReady Linux Builder EUS (v. 10.0) libperf 6.12.0-55.105.1.el10_0, kernel-debuginfo-common-s390x 6.12.0-55.105.1.el10_0, kernel-debuginfo-common-x86_64 6.12.0-55.105.1.el10_0, kernel-debuginfo-common-aarch64 6.12.0-55.105.1.el10_0, kernel-debuginfo-common-ppc64le 6.12.0-55.105.1.el10_0
    fixed: vendor fix “To mitigate this issue, prevent the nf_conntrack_sip and nf_nat_sip modules from being loaded. See https://access.redhat.com/solutions/41278 for instructions.” RHSA-2026:69089
  • Red Hat Enterprise Linux CRB (v. 8) kernel-debuginfo-common-x86_64 4.18.0-553.160.1.el8_10, kernel-debuginfo-common-aarch64 4.18.0-553.160.1.el8_10, kernel-debuginfo-common-ppc64le 4.18.0-553.160.1.el8_10
    fixed: vendor fix “To mitigate this issue, prevent the nf_conntrack_sip and nf_nat_sip modules from being loaded. See https://access.redhat.com/solutions/41278 for instructions.” RHSA-2026:66000
  • Red Hat Enterprise Linux for Real Time (v. 7 ELS) kernel-rt 3.10.0-1160.167.1.rt56.1319.el7, kernel-rt-trace 3.10.0-1160.167.1.rt56.1319.el7, kernel-rt-debuginfo-common-x86_64 3.10.0-1160.167.1.rt56.1319.el7
    fixed: vendor fix “To mitigate this issue, prevent the nf_conntrack_sip and nf_nat_sip modules from being loaded. See https://access.redhat.com/solutions/41278 for instructions.” RHSA-2026:81371
  • Red Hat Enterprise Linux NFV (v. 8) kernel-rt 4.18.0-553.160.1.rt7.501.el8_10, kernel-rt-kvm 4.18.0-553.160.1.rt7.501.el8_10, kernel-rt-core 4.18.0-553.160.1.rt7.501.el8_10, kernel-rt-modules 4.18.0-553.160.1.rt7.501.el8_10, kernel-rt-debug-kvm 4.18.0-553.160.1.rt7.501.el8_10, kernel-rt-debug-core 4.18.0-553.160.1.rt7.501.el8_10, +4 more
    fixed: vendor fix “To mitigate this issue, prevent the nf_conntrack_sip and nf_nat_sip modules from being loaded. See https://access.redhat.com/solutions/41278 for instructions.” RHSA-2026:64770
  • Red Hat Enterprise Linux Real Time (v. 9) kernel-rt 5.14.0-687.46.1.el9_8, kernel-rt-64k 5.14.0-687.46.1.el9_8, kernel-rt-core 5.14.0-687.46.1.el9_8, kernel-rt-modules 5.14.0-687.46.1.el9_8, kernel-rt-64k-core 5.14.0-687.46.1.el9_8, kernel-rt-debug-core 5.14.0-687.46.1.el9_8, +14 more
    fixed: vendor fix “To mitigate this issue, prevent the nf_conntrack_sip and nf_nat_sip modules from being loaded. See https://access.redhat.com/solutions/41278 for instructions.” RHSA-2026:66180
  • Red Hat Enterprise Linux Real Time E4S (v.9.2) kernel-rt 5.14.0-284.195.1.rt14.480.el9_2, kernel-rt-core 5.14.0-284.195.1.rt14.480.el9_2, kernel-rt-modules 5.14.0-284.195.1.rt14.480.el9_2, kernel-rt-debug-core 5.14.0-284.195.1.rt14.480.el9_2, kernel-rt-modules-core 5.14.0-284.195.1.rt14.480.el9_2, kernel-rt-debug-modules 5.14.0-284.195.1.rt14.480.el9_2, +4 more
    fixed: vendor fix “To mitigate this issue, prevent the nf_conntrack_sip and nf_nat_sip modules from being loaded. See https://access.redhat.com/solutions/41278 for instructions.” RHSA-2026:77214
  • Red Hat Enterprise Linux Real Time E4S (v.9.4) kernel-rt 5.14.0-427.153.1.el9_4, kernel-rt-core 5.14.0-427.153.1.el9_4, kernel-rt-modules 5.14.0-427.153.1.el9_4, kernel-rt-debug-core 5.14.0-427.153.1.el9_4, kernel-rt-modules-core 5.14.0-427.153.1.el9_4, kernel-rt-debug-modules 5.14.0-427.153.1.el9_4, +4 more
    fixed: vendor fix “To mitigate this issue, prevent the nf_conntrack_sip and nf_nat_sip modules from being loaded. See https://access.redhat.com/solutions/41278 for instructions.” RHSA-2026:73645
  • Red Hat Enterprise Linux Real Time EUS (v. 10.0) kernel-rt 6.12.0-55.105.1.el10_0, kernel-rt-64k 6.12.0-55.105.1.el10_0, kernel-rt-core 6.12.0-55.105.1.el10_0, kernel-rt-modules 6.12.0-55.105.1.el10_0, kernel-rt-64k-core 6.12.0-55.105.1.el10_0, kernel-rt-debug-core 6.12.0-55.105.1.el10_0, +14 more
    fixed: vendor fix “To mitigate this issue, prevent the nf_conntrack_sip and nf_nat_sip modules from being loaded. See https://access.redhat.com/solutions/41278 for instructions.” RHSA-2026:69089
  • Red Hat Enterprise Linux Real Time EUS (v.9.6) kernel-rt 5.14.0-570.146.1.el9_6, kernel-rt-64k 5.14.0-570.146.1.el9_6, kernel-rt-core 5.14.0-570.146.1.el9_6, kernel-rt-modules 5.14.0-570.146.1.el9_6, kernel-rt-64k-core 5.14.0-570.146.1.el9_6, kernel-rt-debug-core 5.14.0-570.146.1.el9_6, +14 more
    fixed: vendor fix “To mitigate this issue, prevent the nf_conntrack_sip and nf_nat_sip modules from being loaded. See https://access.redhat.com/solutions/41278 for instructions.” RHSA-2026:74174
  • Red Hat Enterprise Linux Real Time for NFV (v. 9) kernel-rt 5.14.0-687.46.1.el9_8, kernel-rt-core 5.14.0-687.46.1.el9_8, kernel-rt-modules 5.14.0-687.46.1.el9_8, kernel-rt-debug-core 5.14.0-687.46.1.el9_8, kernel-rt-modules-core 5.14.0-687.46.1.el9_8, kernel-rt-debug-modules 5.14.0-687.46.1.el9_8, +4 more
    fixed: vendor fix “To mitigate this issue, prevent the nf_conntrack_sip and nf_nat_sip modules from being loaded. See https://access.redhat.com/solutions/41278 for instructions.” RHSA-2026:66180
  • Red Hat Enterprise Linux Real Time for NFV E4S (v.9.2) kernel-rt 5.14.0-284.195.1.rt14.480.el9_2, kernel-rt-kvm 5.14.0-284.195.1.rt14.480.el9_2, kernel-rt-core 5.14.0-284.195.1.rt14.480.el9_2, kernel-rt-modules 5.14.0-284.195.1.rt14.480.el9_2, kernel-rt-debug-kvm 5.14.0-284.195.1.rt14.480.el9_2, kernel-rt-debug-core 5.14.0-284.195.1.rt14.480.el9_2, +6 more
    fixed: vendor fix “To mitigate this issue, prevent the nf_conntrack_sip and nf_nat_sip modules from being loaded. See https://access.redhat.com/solutions/41278 for instructions.” RHSA-2026:77214
  • Red Hat Enterprise Linux Real Time for NFV E4S (v.9.4) kernel-rt 5.14.0-427.153.1.el9_4, kernel-rt-kvm 5.14.0-427.153.1.el9_4, kernel-rt-core 5.14.0-427.153.1.el9_4, kernel-rt-modules 5.14.0-427.153.1.el9_4, kernel-rt-debug-kvm 5.14.0-427.153.1.el9_4, kernel-rt-debug-core 5.14.0-427.153.1.el9_4, +6 more
    fixed: vendor fix “To mitigate this issue, prevent the nf_conntrack_sip and nf_nat_sip modules from being loaded. See https://access.redhat.com/solutions/41278 for instructions.” RHSA-2026:73645
  • Red Hat Enterprise Linux Real Time for NFV EUS (v. 10.0) kernel-rt 6.12.0-55.105.1.el10_0, kernel-rt-kvm 6.12.0-55.105.1.el10_0, kernel-rt-core 6.12.0-55.105.1.el10_0, kernel-rt-modules 6.12.0-55.105.1.el10_0, kernel-rt-debug-kvm 6.12.0-55.105.1.el10_0, kernel-rt-debug-core 6.12.0-55.105.1.el10_0, +6 more
    fixed: vendor fix “To mitigate this issue, prevent the nf_conntrack_sip and nf_nat_sip modules from being loaded. See https://access.redhat.com/solutions/41278 for instructions.” RHSA-2026:69089
  • Red Hat Enterprise Linux Real Time for NFV EUS (v.9.6) kernel-rt 5.14.0-570.146.1.el9_6, kernel-rt-kvm 5.14.0-570.146.1.el9_6, kernel-rt-core 5.14.0-570.146.1.el9_6, kernel-rt-modules 5.14.0-570.146.1.el9_6, kernel-rt-debug-kvm 5.14.0-570.146.1.el9_6, kernel-rt-debug-core 5.14.0-570.146.1.el9_6, +6 more
    fixed: vendor fix “To mitigate this issue, prevent the nf_conntrack_sip and nf_nat_sip modules from being loaded. See https://access.redhat.com/solutions/41278 for instructions.” RHSA-2026:74174
  • Red Hat Enterprise Linux RT (v. 8) kernel-rt 4.18.0-553.160.1.rt7.501.el8_10, kernel-rt-core 4.18.0-553.160.1.rt7.501.el8_10, kernel-rt-modules 4.18.0-553.160.1.rt7.501.el8_10, kernel-rt-debug-core 4.18.0-553.160.1.rt7.501.el8_10, kernel-rt-debug-modules 4.18.0-553.160.1.rt7.501.el8_10, kernel-rt-modules-extra 4.18.0-553.160.1.rt7.501.el8_10, +2 more
    fixed: vendor fix “To mitigate this issue, prevent the nf_conntrack_sip and nf_nat_sip modules from being loaded. See https://access.redhat.com/solutions/41278 for instructions.” RHSA-2026:64770
  • Red Hat Enterprise Linux Server (v. 7 ELS) perf 3.10.0-1160.167.1.el7, kernel 3.10.0-1160.167.1.el7, bpftool 3.10.0-1160.167.1.el7, python-perf 3.10.0-1160.167.1.el7, kernel-kdump 3.10.0-1160.167.1.el7, kernel-tools 3.10.0-1160.167.1.el7, +7 more Red Hat Enterprise Linux Server Optional (v. 7 ELS) kernel-debuginfo-common-ppc64 3.10.0-1160.167.1.el7, kernel-debuginfo-common-x86_64 3.10.0-1160.167.1.el7, kernel-debuginfo-common-ppc64le 3.10.0-1160.167.1.el7
    fixed: vendor fix “To mitigate this issue, prevent the nf_conntrack_sip and nf_nat_sip modules from being loaded. See https://access.redhat.com/solutions/41278 for instructions.” RHSA-2026:81349
  • Red Hat Enterprise Linux 6 perf, kernel, python-perf, kernel-kdump, kernel-firmware, kernel-bootwrapper, +1 more
    not affected: vulnerable code not present

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-26-295-11 updated cvss 9.8

Siemens SIMATIC S7-1500 CPU 1518(F)-4 PN/DP MFP

  • Siemens SIMATIC S7-1500 CPU 1518-4 PN/DP MFP (6ES7518-4AX00-1AB0) >= 3.1.7 Siemens SIMATIC S7-1500 CPU 1518-4 PN/DP MFP (6ES7518-4AX00-1AC0) >= 3.1.7 Siemens SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP (6ES7518-4FX00-1AB0) >= 3.1.7 Siemens SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP (6ES7518-4FX00-1AC0) >= 3.1.7 Siemens SIPLUS S7-1500 CPU 1518-4 PN/DP MFP (6AG1518-4AX00-4AC0) >= 3.1.7
    affected: mitigation, no fix available

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
yes
Technical impact
total
Assessed
23 d ago

Exploit prediction

0.37% chance of exploitation in the next 30 days, higher than 30% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CNA 3.1 9.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CISA ADP 3.1 7.0 CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
CNA 3.1 7.0 CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H

Affected products

  • Linux Linux
  • Red Hat Red Hat Enterprise Linux 8
  • Red Hat Red Hat Enterprise Linux 9
  • Red Hat Red Hat Enterprise Linux 10
  • Red Hat Red Hat Enterprise Linux 6
  • Red Hat Red Hat Enterprise Linux 7
  • Siemens SIMATIC S7-1500 CPU 1518-4 PN/DP MFP
  • Siemens SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP
  • 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.