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Fencer Vulns
high 7.8

CVE-2025-38248 json

bridge: mcast: Fix use-after-free during router port configuration

published 2025-07-09 16 mo ago modified 2026-10-30 10 d ago also EUVD-2025-20813

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 22%
public exploits
0
none known

Summary

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

bridge: mcast: Fix use-after-free during router port configuration

The bridge maintains a global list of ports behind which a multicast router resides. The list is consulted during forwarding to ensure multicast packets are forwarded to these ports even if the ports are not member in the matching MDB entry.

When per-VLAN multicast snooping is enabled, the per-port multicast context is disabled on each port and the port is removed from the global router port list:

# ip link add name br1 up type bridge vlan_filtering 1 mcast_snooping 1 # ip link add name dummy1 up master br1 type dummy # ip link set dev dummy1 type bridge_slave mcast_router 2 $ bridge -d mdb show | grep router router ports on br1: dummy1 # ip link set dev br1 type bridge mcast_vlan_snooping 1 $ bridge -d mdb show | grep router

However, the port can be re-added to the global list even when per-VLAN multicast snooping is enabled:

# ip link set dev dummy1 type bridge_slave mcast_router 0 # ip link set dev dummy1 type bridge_slave mcast_router 2 $ bridge -d mdb show | grep router router ports on br1: dummy1

Since commit 4b30ae9adb04 ("net: bridge: mcast: re-implement br_multicast_{enable, disable}_port functions"), when per-VLAN multicast snooping is enabled, multicast disablement on a port will disable the per-{port, VLAN} multicast contexts and not the per-port one. As a result, a port will remain in the global router port list even after it is deleted. This will lead to a use-after-free [1] when the list is traversed (when adding a new port to the list, for example):

# ip link del dev dummy1 # ip link add name dummy2 up master br1 type dummy # ip link set dev dummy2 type bridge_slave mcast_router 2

Similarly, stale entries can also be found in the per-VLAN router port list. When per-VLAN multicast snooping is disabled, the per-{port, VLAN} contexts are disabled on each port and the port is removed from the per-VLAN router port list:

# ip link add name br1 up type bridge vlan_filtering 1 mcast_snooping 1 mcast_vlan_snooping 1 # ip link add name dummy1 up master br1 type dummy # bridge vlan add vid 2 dev dummy1 # bridge vlan global set vid 2 dev br1 mcast_snooping 1 # bridge vlan set vid 2 dev dummy1 mcast_router 2 $ bridge vlan global show dev br1 vid 2 | grep router router ports: dummy1 # ip link set dev br1 type bridge mcast_vlan_snooping 0 $ bridge vlan global show dev br1 vid 2 | grep router

However, the port can be re-added to the per-VLAN list even when per-VLAN multicast snooping is disabled:

# bridge vlan set vid 2 dev dummy1 mcast_router 0 # bridge vlan set vid 2 dev dummy1 mcast_router 2 $ bridge vlan global show dev br1 vid 2 | grep router router ports: dummy1

When the VLAN is deleted from the port, the per-{port, VLAN} multicast context will not be disabled since multicast snooping is not enabled on the VLAN. As a result, the port will remain in the per-VLAN router port list even after it is no longer member in the VLAN. This will lead to a use-after-free [2] when the list is traversed (when adding a new port to the list, for example):

# ip link add name dummy2 up master br1 type dummy # bridge vlan add vid 2 dev dummy2 # bridge vlan del vid 2 dev dummy1 # bridge vlan set vid 2 dev dummy2 mcast_router 2

Fix these issues by removing the port from the relevant (global or per-VLAN) router port list in br_multicast_port_ctx_deinit(). The function is invoked during port deletion with the per-port multicast context and during VLAN deletion with the per-{port, VLAN} multicast context.

Note that deleting the multicast router timer is not enough as it only takes care of the temporary multicast router states (1 or 3) and not the permanent one (2).

[1] BUG: KASAN: slab-out-of-bounds in br_multicast_add_router.part.0+0x3f1/0x560 Write of size 8 at addr ffff888004a67328 by task ip/384 [...] Call Trace: <TASK> dump_stack ---truncated---

Patch / fix

  • Linux Linux 5.15.224, 6.1.191, 6.6.122, 6.12.67, 6.15.5, 6.16
  • linux Debian 13 6.12.69-1
  • linux Debian 14 6.16.3-1

debian advisories DEBIAN-CVE-2025-38248

  • linux Ubuntu 22.04 LTS 5.15.0-170.180
  • linux Ubuntu 24.04 LTS 6.8.0-100.100
  • linux-aws Ubuntu 22.04 LTS 5.15.0-1100.107
  • linux-aws Ubuntu 24.04 LTS 6.8.0-1046.49
  • linux-gcp Ubuntu 22.04 LTS 5.15.0-1100.109
  • linux-gcp Ubuntu 24.04 LTS 6.8.0-1047.50
  • linux-gke Ubuntu 22.04 LTS 5.15.0-1096.102
  • linux-gke Ubuntu 24.04 LTS 6.8.0-1043.48

ubuntu advisories UBUNTU-CVE-2025-38248

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-rt RHEL 8 4.18.0-553.107.1.rt7.448.el8_10
  • kernel-rt-kvm RHEL 8 4.18.0-553.107.1.rt7.448.el8_10
  • kernel-rt-core RHEL 8 4.18.0-553.107.1.rt7.448.el8_10
  • kernel-rt-modules RHEL 8 4.18.0-553.107.1.rt7.448.el8_10
  • kernel-rt-debug-kvm RHEL 8 4.18.0-553.107.1.rt7.448.el8_10
  • kernel-rt-debug-core RHEL 8 4.18.0-553.107.1.rt7.448.el8_10
  • kernel-rt-debug-modules RHEL 8 4.18.0-553.107.1.rt7.448.el8_10
  • kernel-rt-modules-extra RHEL 8 4.18.0-553.107.1.rt7.448.el8_10

red hat advisories RHSA-2026:9644RHSA-2026:9512RHSA-2026:7100RHSA-2026:7013RHSA-2026:6961RHSA-2026:6954

  • kernel-rt Real Time Module 15 SP6, openSUSE Leap 15.6 6.4.0-150600.10.49.1
  • kernel-syms-rt Real Time Module 15 SP6, openSUSE Leap 15.6 6.4.0-150600.10.49.1
  • kernel-rt_debug Real Time Module 15 SP6, openSUSE Leap 15.6 6.4.0-150600.10.49.1
  • kernel-source-rt Real Time Module 15 SP6, openSUSE Leap 15.6 6.4.0-150600.10.49.1
  • kernel-azure SLE Module for Public Cloud 15 SP7 6.4.0-150700.20.11.1
  • kernel-syms-azure SLE Module for Public Cloud 15 SP7 6.4.0-150700.20.11.1
  • kernel-source-azure SLE Module for Public Cloud 15 SP7 6.4.0-150700.20.11.1
  • kernel-64kb SLE Module for Basesystem 15 SP7 6.4.0-150700.53.11.1

suse advisories SUSE-SU-2025:03023-1SUSE-SU-2025:03011-1SUSE-SU-2025:02997-1SUSE-SU-2025:02996-1SUSE-SU-2025:20586-1SUSE-SU-2025:20602-1

  • kernel AlmaLinux 8 4.18.0-553.107.1.el8_10
  • perf AlmaLinux 8 4.18.0-553.107.1.el8_10
  • bpftool AlmaLinux 8 4.18.0-553.107.1.el8_10
  • kernel-core AlmaLinux 8 4.18.0-553.107.1.el8_10
  • kernel-tools AlmaLinux 8 4.18.0-553.107.1.el8_10
  • python3-perf AlmaLinux 8 4.18.0-553.107.1.el8_10
  • kernel-modules AlmaLinux 8 4.18.0-553.107.1.el8_10
  • kernel-zfcpdump AlmaLinux 8 4.18.0-553.107.1.el8_10

almalinux advisories ALSA-2026:3083ALSA-2026:3110

  • kernel Azure Linux 3.0 6.6.126.1-1

azure linux advisories AZL-64841

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-2025-38248 updated cvss 7.3

kernel: Linux kernel:A use-after-free in bridge multicast in br_multicast_port_ctx_init

  • Red Hat Enterprise Linux 9 rv, perf, rtla, kernel, bpftool, libperf, +83 more Red Hat Enterprise Linux 10 kernel
    affected: no fix available
  • Red Hat CodeReady Linux Builder EUS (v.9.4) libperf 5.14.0-427.116.1.el9_4, kernel-debuginfo-common-s390x 5.14.0-427.116.1.el9_4, kernel-debuginfo-common-x86_64 5.14.0-427.116.1.el9_4, kernel-debuginfo-common-aarch64 5.14.0-427.116.1.el9_4, kernel-debuginfo-common-ppc64le 5.14.0-427.116.1.el9_4
    fixed: vendor fix RHSA-2026:5692
  • Red Hat CodeReady Linux Builder EUS (v.9.6) libperf 5.14.0-570.100.1.el9_6, kernel-debuginfo-common-s390x 5.14.0-570.100.1.el9_6, kernel-debuginfo-common-x86_64 5.14.0-570.100.1.el9_6, kernel-debuginfo-common-aarch64 5.14.0-570.100.1.el9_6, kernel-debuginfo-common-ppc64le 5.14.0-570.100.1.el9_6
    fixed: vendor fix RHSA-2026:5197
  • Red Hat Enterprise Linux AppStream E4S (v.9.0) perf 5.14.0-70.173.1.el9_0, kernel-devel-matched 5.14.0-70.173.1.el9_0, kernel-debug-devel-matched 5.14.0-70.173.1.el9_0, kernel-debuginfo-common-s390x 5.14.0-70.173.1.el9_0, kernel-zfcpdump-devel-matched 5.14.0-70.173.1.el9_0, kernel-debuginfo-common-x86_64 5.14.0-70.173.1.el9_0, +2 more
    fixed: vendor fix RHSA-2026:7013
  • Red Hat Enterprise Linux AppStream E4S (v.9.2) perf 5.14.0-284.166.1.el9_2, rtla 5.14.0-284.166.1.el9_2, kernel-devel-matched 5.14.0-284.166.1.el9_2, kernel-64k-devel-matched 5.14.0-284.166.1.el9_2, kernel-debug-devel-matched 5.14.0-284.166.1.el9_2, kernel-debuginfo-common-s390x 5.14.0-284.166.1.el9_2, +5 more
    fixed: vendor fix RHSA-2026:9644
  • Red Hat Enterprise Linux AppStream EUS (v. 10.0) rv 6.12.0-55.65.1.el10_0, perf 6.12.0-55.65.1.el10_0, rtla 6.12.0-55.65.1.el10_0, python3-perf 6.12.0-55.65.1.el10_0, kernel-devel-matched 6.12.0-55.65.1.el10_0, kernel-64k-devel-matched 6.12.0-55.65.1.el10_0, +7 more
    fixed: vendor fix RHSA-2026:6193
  • Red Hat Enterprise Linux AppStream EUS (v.9.4) rv 5.14.0-427.116.1.el9_4, perf 5.14.0-427.116.1.el9_4, rtla 5.14.0-427.116.1.el9_4, kernel-devel-matched 5.14.0-427.116.1.el9_4, kernel-64k-devel-matched 5.14.0-427.116.1.el9_4, kernel-debug-devel-matched 5.14.0-427.116.1.el9_4, +6 more
    fixed: vendor fix RHSA-2026:5692
  • Red Hat Enterprise Linux AppStream EUS (v.9.6) rv 5.14.0-570.100.1.el9_6, perf 5.14.0-570.100.1.el9_6, rtla 5.14.0-570.100.1.el9_6, python3-perf 5.14.0-570.100.1.el9_6, kernel-devel-matched 5.14.0-570.100.1.el9_6, kernel-64k-devel-matched 5.14.0-570.100.1.el9_6, +7 more
    fixed: vendor fix RHSA-2026:5197
show 24 more
  • Red Hat Enterprise Linux BaseOS (v. 8) perf 4.18.0-553.107.1.el8_10, kernel 4.18.0-553.107.1.el8_10, bpftool 4.18.0-553.107.1.el8_10, kernel-core 4.18.0-553.107.1.el8_10, kernel-tools 4.18.0-553.107.1.el8_10, python3-perf 4.18.0-553.107.1.el8_10, +15 more
    fixed: vendor fix RHSA-2026:3083
  • Red Hat Enterprise Linux BaseOS AUS (v.8.6) perf 4.18.0-372.187.1.el8_6, kernel 4.18.0-372.187.1.el8_6, bpftool 4.18.0-372.187.1.el8_6, kernel-core 4.18.0-372.187.1.el8_6, kernel-tools 4.18.0-372.187.1.el8_6, python3-perf 4.18.0-372.187.1.el8_6, +8 more Red Hat Enterprise Linux BaseOS E4S (v.8.6) perf 4.18.0-372.187.1.el8_6, kernel 4.18.0-372.187.1.el8_6, bpftool 4.18.0-372.187.1.el8_6, kernel-core 4.18.0-372.187.1.el8_6, kernel-tools 4.18.0-372.187.1.el8_6, python3-perf 4.18.0-372.187.1.el8_6, +15 more
    fixed: vendor fix RHSA-2026:6961
  • Red Hat Enterprise Linux BaseOS E4S (v.8.8) perf 4.18.0-477.135.1.el8_8, kernel 4.18.0-477.135.1.el8_8, bpftool 4.18.0-477.135.1.el8_8, kernel-core 4.18.0-477.135.1.el8_8, kernel-tools 4.18.0-477.135.1.el8_8, python3-perf 4.18.0-477.135.1.el8_8, +9 more
    fixed: vendor fix RHSA-2026:6954
  • Red Hat Enterprise Linux BaseOS E4S (v.9.0) kernel 5.14.0-70.173.1.el9_0, bpftool 5.14.0-70.173.1.el9_0, kernel-core 5.14.0-70.173.1.el9_0, kernel-tools 5.14.0-70.173.1.el9_0, python3-perf 5.14.0-70.173.1.el9_0, kernel-modules 5.14.0-70.173.1.el9_0, +14 more
    fixed: vendor fix RHSA-2026:7013
  • Red Hat Enterprise Linux BaseOS E4S (v.9.2) bpftool 7.0.0-284.166.1.el9_2, kernel 5.14.0-284.166.1.el9_2, kernel-64k 5.14.0-284.166.1.el9_2, kernel-core 5.14.0-284.166.1.el9_2, kernel-tools 5.14.0-284.166.1.el9_2, python3-perf 5.14.0-284.166.1.el9_2, +28 more
    fixed: vendor fix RHSA-2026:9644
  • Red Hat Enterprise Linux BaseOS EUS (v. 10.0) kernel 6.12.0-55.65.1.el10_0, kernel-64k 6.12.0-55.65.1.el10_0, kernel-core 6.12.0-55.65.1.el10_0, kernel-tools 6.12.0-55.65.1.el10_0, kernel-modules 6.12.0-55.65.1.el10_0, kernel-64k-core 6.12.0-55.65.1.el10_0, +27 more
    fixed: vendor fix RHSA-2026:6193
  • Red Hat Enterprise Linux BaseOS EUS (v.9.4) bpftool 7.3.0-427.116.1.el9_4, kernel 5.14.0-427.116.1.el9_4, kernel-64k 5.14.0-427.116.1.el9_4, kernel-core 5.14.0-427.116.1.el9_4, kernel-tools 5.14.0-427.116.1.el9_4, python3-perf 5.14.0-427.116.1.el9_4, +28 more
    fixed: vendor fix RHSA-2026:5692
  • Red Hat Enterprise Linux BaseOS EUS (v.9.6) kernel 5.14.0-570.100.1.el9_6, kernel-64k 5.14.0-570.100.1.el9_6, kernel-core 5.14.0-570.100.1.el9_6, kernel-tools 5.14.0-570.100.1.el9_6, kernel-modules 5.14.0-570.100.1.el9_6, kernel-64k-core 5.14.0-570.100.1.el9_6, +27 more
    fixed: vendor fix RHSA-2026:5197
  • Red Hat Enterprise Linux BaseOS TUS (v.8.6) perf 4.18.0-372.187.1.el8_6, kernel 4.18.0-372.187.1.el8_6, bpftool 4.18.0-372.187.1.el8_6, kernel-core 4.18.0-372.187.1.el8_6, kernel-tools 4.18.0-372.187.1.el8_6, python3-perf 4.18.0-372.187.1.el8_6, +8 more
    fixed: vendor fix RHSA-2026:6961
  • Red Hat Enterprise Linux BaseOS TUS (v.8.8) perf 4.18.0-477.135.1.el8_8, kernel 4.18.0-477.135.1.el8_8, bpftool 4.18.0-477.135.1.el8_8, kernel-core 4.18.0-477.135.1.el8_8, kernel-tools 4.18.0-477.135.1.el8_8, python3-perf 4.18.0-477.135.1.el8_8, +8 more
    fixed: vendor fix RHSA-2026:6954
  • Red Hat Enterprise Linux CodeReady Linux Builder EUS (v. 10.0) libperf 6.12.0-55.65.1.el10_0, kernel-debuginfo-common-s390x 6.12.0-55.65.1.el10_0, kernel-debuginfo-common-x86_64 6.12.0-55.65.1.el10_0, kernel-debuginfo-common-aarch64 6.12.0-55.65.1.el10_0, kernel-debuginfo-common-ppc64le 6.12.0-55.65.1.el10_0
    fixed: vendor fix RHSA-2026:6193
  • Red Hat Enterprise Linux CRB (v. 8) kernel-debuginfo-common-x86_64 4.18.0-553.107.1.el8_10, kernel-debuginfo-common-aarch64 4.18.0-553.107.1.el8_10, kernel-debuginfo-common-ppc64le 4.18.0-553.107.1.el8_10
    fixed: vendor fix RHSA-2026:3083
  • Red Hat Enterprise Linux NFV (v. 8) kernel-rt 4.18.0-553.107.1.rt7.448.el8_10, kernel-rt-kvm 4.18.0-553.107.1.rt7.448.el8_10, kernel-rt-core 4.18.0-553.107.1.rt7.448.el8_10, kernel-rt-modules 4.18.0-553.107.1.rt7.448.el8_10, kernel-rt-debug-kvm 4.18.0-553.107.1.rt7.448.el8_10, kernel-rt-debug-core 4.18.0-553.107.1.rt7.448.el8_10, +4 more
    fixed: vendor fix RHSA-2026:3110
  • Red Hat Enterprise Linux NFV E4S (v.9.0) kernel-rt 5.14.0-70.173.1.rt21.245.el9_0, kernel-rt-kvm 5.14.0-70.173.1.rt21.245.el9_0, kernel-rt-core 5.14.0-70.173.1.rt21.245.el9_0, kernel-rt-modules 5.14.0-70.173.1.rt21.245.el9_0, kernel-rt-debug-kvm 5.14.0-70.173.1.rt21.245.el9_0, kernel-rt-debug-core 5.14.0-70.173.1.rt21.245.el9_0, +4 more Red Hat Enterprise Linux Real Time E4S (v.9.0) kernel-rt 5.14.0-70.173.1.rt21.245.el9_0, kernel-rt-core 5.14.0-70.173.1.rt21.245.el9_0, kernel-rt-modules 5.14.0-70.173.1.rt21.245.el9_0, kernel-rt-debug-core 5.14.0-70.173.1.rt21.245.el9_0, kernel-rt-debug-modules 5.14.0-70.173.1.rt21.245.el9_0, kernel-rt-modules-extra 5.14.0-70.173.1.rt21.245.el9_0, +2 more
    fixed: vendor fix RHSA-2026:7100
  • Red Hat Enterprise Linux Real Time E4S (v.9.2) kernel-rt 5.14.0-284.166.1.rt14.451.el9_2, kernel-rt-core 5.14.0-284.166.1.rt14.451.el9_2, kernel-rt-modules 5.14.0-284.166.1.rt14.451.el9_2, kernel-rt-debug-core 5.14.0-284.166.1.rt14.451.el9_2, kernel-rt-modules-core 5.14.0-284.166.1.rt14.451.el9_2, kernel-rt-debug-modules 5.14.0-284.166.1.rt14.451.el9_2, +4 more
    fixed: vendor fix RHSA-2026:9512
  • Red Hat Enterprise Linux Real Time EUS (v. 10.0) kernel-rt 6.12.0-55.65.1.el10_0, kernel-rt-64k 6.12.0-55.65.1.el10_0, kernel-rt-core 6.12.0-55.65.1.el10_0, kernel-rt-modules 6.12.0-55.65.1.el10_0, kernel-rt-64k-core 6.12.0-55.65.1.el10_0, kernel-rt-debug-core 6.12.0-55.65.1.el10_0, +14 more
    fixed: vendor fix RHSA-2026:6193
  • Red Hat Enterprise Linux Real Time EUS (v.9.4) kernel-rt 5.14.0-427.116.1.el9_4, kernel-rt-core 5.14.0-427.116.1.el9_4, kernel-rt-modules 5.14.0-427.116.1.el9_4, kernel-rt-debug-core 5.14.0-427.116.1.el9_4, kernel-rt-modules-core 5.14.0-427.116.1.el9_4, kernel-rt-debug-modules 5.14.0-427.116.1.el9_4, +4 more
    fixed: vendor fix RHSA-2026:5692
  • Red Hat Enterprise Linux Real Time EUS (v.9.6) kernel-rt 5.14.0-570.100.1.el9_6, kernel-rt-64k 5.14.0-570.100.1.el9_6, kernel-rt-core 5.14.0-570.100.1.el9_6, kernel-rt-modules 5.14.0-570.100.1.el9_6, kernel-rt-64k-core 5.14.0-570.100.1.el9_6, kernel-rt-debug-core 5.14.0-570.100.1.el9_6, +14 more
    fixed: vendor fix RHSA-2026:5197
  • Red Hat Enterprise Linux Real Time for NFV E4S (v.9.2) kernel-rt 5.14.0-284.166.1.rt14.451.el9_2, kernel-rt-kvm 5.14.0-284.166.1.rt14.451.el9_2, kernel-rt-core 5.14.0-284.166.1.rt14.451.el9_2, kernel-rt-modules 5.14.0-284.166.1.rt14.451.el9_2, kernel-rt-debug-kvm 5.14.0-284.166.1.rt14.451.el9_2, kernel-rt-debug-core 5.14.0-284.166.1.rt14.451.el9_2, +6 more
    fixed: vendor fix RHSA-2026:9512
  • Red Hat Enterprise Linux Real Time for NFV EUS (v. 10.0) kernel-rt 6.12.0-55.65.1.el10_0, kernel-rt-kvm 6.12.0-55.65.1.el10_0, kernel-rt-core 6.12.0-55.65.1.el10_0, kernel-rt-modules 6.12.0-55.65.1.el10_0, kernel-rt-debug-kvm 6.12.0-55.65.1.el10_0, kernel-rt-debug-core 6.12.0-55.65.1.el10_0, +6 more
    fixed: vendor fix RHSA-2026:6193
  • Red Hat Enterprise Linux Real Time for NFV EUS (v.9.4) kernel-rt 5.14.0-427.116.1.el9_4, kernel-rt-kvm 5.14.0-427.116.1.el9_4, kernel-rt-core 5.14.0-427.116.1.el9_4, kernel-rt-modules 5.14.0-427.116.1.el9_4, kernel-rt-debug-kvm 5.14.0-427.116.1.el9_4, kernel-rt-debug-core 5.14.0-427.116.1.el9_4, +6 more
    fixed: vendor fix RHSA-2026:5692
  • Red Hat Enterprise Linux Real Time for NFV EUS (v.9.6) kernel-rt 5.14.0-570.100.1.el9_6, kernel-rt-kvm 5.14.0-570.100.1.el9_6, kernel-rt-core 5.14.0-570.100.1.el9_6, kernel-rt-modules 5.14.0-570.100.1.el9_6, kernel-rt-debug-kvm 5.14.0-570.100.1.el9_6, kernel-rt-debug-core 5.14.0-570.100.1.el9_6, +6 more
    fixed: vendor fix RHSA-2026:5197
  • Red Hat Enterprise Linux RT (v. 8) kernel-rt 4.18.0-553.107.1.rt7.448.el8_10, kernel-rt-core 4.18.0-553.107.1.rt7.448.el8_10, kernel-rt-modules 4.18.0-553.107.1.rt7.448.el8_10, kernel-rt-debug-core 4.18.0-553.107.1.rt7.448.el8_10, kernel-rt-debug-modules 4.18.0-553.107.1.rt7.448.el8_10, kernel-rt-modules-extra 4.18.0-553.107.1.rt7.448.el8_10, +2 more
    fixed: vendor fix RHSA-2026:3110
  • Red Hat Enterprise Linux 6 perf, kernel, python-perf, kernel-kdump, kernel-firmware, kernel-bootwrapper, +1 more Red Hat Enterprise Linux 7 perf, kernel, bpftool, kernel-rt, python-perf, kernel-kdump, +8 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 SSVC

Exploitation
none
Automatable
no
Technical impact
total
Assessed
4 mo ago

Exploit prediction

0.30% chance of exploitation in the next 30 days, higher than 22% 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 Linux

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.