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Fencer Vulns
high 7.8

CVE-2026-31419 json

net: bonding: fix use-after-free in bond_xmit_broadcast()

published 2026-04-13 6 mo ago modified 2026-10-30 10 d ago also EUVD-2026-21943

cvss
7.8
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.1%
EPSS 0.1% chance of exploitation in 30 days, percentile 2%
public exploits
0
none known

Summary

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

net: bonding: fix use-after-free in bond_xmit_broadcast()

bond_xmit_broadcast() reuses the original skb for the last slave (determined by bond_is_last_slave()) and clones it for others. Concurrent slave enslave/release can mutate the slave list during RCU-protected iteration, changing which slave is "last" mid-loop. This causes the original skb to be double-consumed (double-freed).

Replace the racy bond_is_last_slave() check with a simple index comparison (i + 1 == slaves_count) against the pre-snapshot slave count taken via READ_ONCE() before the loop. This preserves the zero-copy optimization for the last slave while making the "last" determination stable against concurrent list mutations.

The UAF can trigger the following crash:

================================================================== BUG: KASAN: slab-use-after-free in skb_clone Read of size 8 at addr ffff888100ef8d40 by task exploit/147

CPU: 1 UID: 0 PID: 147 Comm: exploit Not tainted 7.0.0-rc3+ #4 PREEMPTLAZY Call Trace: <TASK> dump_stack_lvl (lib/dump_stack.c:123) print_report (mm/kasan/report.c:379 mm/kasan/report.c:482) kasan_report (mm/kasan/report.c:597) skb_clone (include/linux/skbuff.h:1724 include/linux/skbuff.h:1792 include/linux/skbuff.h:3396 net/core/skbuff.c:2108) bond_xmit_broadcast (drivers/net/bonding/bond_main.c:5334) bond_start_xmit (drivers/net/bonding/bond_main.c:5567 drivers/net/bonding/bond_main.c:5593) dev_hard_start_xmit (include/linux/netdevice.h:5325 include/linux/netdevice.h:5334 net/core/dev.c:3871 net/core/dev.c:3887) __dev_queue_xmit (include/linux/netdevice.h:3601 net/core/dev.c:4838) ip6_finish_output2 (include/net/neighbour.h:540 include/net/neighbour.h:554 net/ipv6/ip6_output.c:136) ip6_finish_output (net/ipv6/ip6_output.c:208 net/ipv6/ip6_output.c:219) ip6_output (net/ipv6/ip6_output.c:250) ip6_send_skb (net/ipv6/ip6_output.c:1985) udp_v6_send_skb (net/ipv6/udp.c:1442) udpv6_sendmsg (net/ipv6/udp.c:1733) __sys_sendto (net/socket.c:730 net/socket.c:742 net/socket.c:2206) __x64_sys_sendto (net/socket.c:2209) do_syscall_64 (arch/x86/entry/syscall_64.c:63 arch/x86/entry/syscall_64.c:94) entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) </TASK>

Allocated by task 147:

Freed by task 147:

The buggy address belongs to the object at ffff888100ef8c80 which belongs to the cache skbuff_head_cache of size 224 The buggy address is located 192 bytes inside of freed 224-byte region [ffff888100ef8c80, ffff888100ef8d60)

Memory state around the buggy address: ffff888100ef8c00: fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc fc ffff888100ef8c80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb >ffff888100ef8d00: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc ^ ffff888100ef8d80: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb ffff888100ef8e00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ==================================================================

Patch / fix

  • Linux Linux 5.10.273, 5.15.224, 5.17, 6.1.184, 6.6.143, 6.12.95, 6.18.22, 6.19.12, 7.0
  • Red Hat Red Hat Enterprise Linux 10 0:6.12.0-124.55.1.el10_1, 0:6.12.0-211.22.1.el10_2
  • Red Hat Red Hat Enterprise Linux 10.0 Extended Update Support 0:6.12.0-55.76.1.el10_0
  • Red Hat Red Hat Enterprise Linux 8 0:4.18.0-553.136.1.el8_10, 0:4.18.0-553.136.1.rt7.477.el8_10
  • Red Hat Red Hat Enterprise Linux 8.8 Telecommunications Update Service 0:4.18.0-477.143.1.el8_8
  • Red Hat Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions 0:4.18.0-477.143.1.el8_8
  • Red Hat Red Hat Enterprise Linux 9 0:5.14.0-687.15.1.el9_8
  • Red Hat Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions 0:5.14.0-284.174.1.el9_2, 0:5.14.0-284.174.1.rt14.459.el9_2
  • Red Hat Red Hat Enterprise Linux 9.4 Extended Update Support 0:5.14.0-427.127.1.el9_4
  • Red Hat Red Hat Enterprise Linux 9.6 Extended Update Support 0:5.14.0-570.119.1.el9_6
  • linux Debian 12 6.1.187-1
  • linux Debian 13 6.12.95-1
  • linux Debian 14 6.19.12-1

debian advisories DEBIAN-CVE-2026-31419

  • linux Ubuntu 22.04 LTS 5.15.0-179.189
  • linux Ubuntu 24.04 LTS 6.8.0-117.117
  • linux Ubuntu 25.10 6.17.0-29.29
  • linux-aws Ubuntu 22.04 LTS 5.15.0-1108.115
  • linux-aws Ubuntu 24.04 LTS 6.8.0-1055.58
  • linux-aws Ubuntu 25.10 6.17.0-1015.15
  • linux-gcp Ubuntu 22.04 LTS 5.15.0-1108.117
  • linux-gcp Ubuntu 24.04 LTS 6.8.0-1058.61

ubuntu advisories UBUNTU-CVE-2026-31419

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

  • kpatch-patch-4_18_0-553_85_1 RHEL 8 1-8.el8_10
  • kpatch-patch-4_18_0-553_53_1 RHEL 8 1-13.el8_10
  • kpatch-patch-4_18_0-553_72_1 RHEL 8 1-10.el8_10
  • kpatch-patch-4_18_0-553_109_1 RHEL 8 1-6.el8_10
  • kpatch-patch-4_18_0-553_125_1 RHEL 8 1-3.el8_10
  • kpatch-patch-5_14_0-687_10_1 RHEL 9 1-3.el9_8
  • kpatch-patch-6_12_0-211_16_1 RHEL 10.2 1-3.el10_2
  • kernel RHEL 8 4.18.0-553.136.1.el8_10

red hat advisories RHSA-2026:36533RHSA-2026:36534RHSA-2026:36531RHSA-2026:36532RHSA-2026:36530RHSA-2026:36172

  • kernel AlmaLinux 8 4.18.0-553.136.1.el8_10
  • perf AlmaLinux 8 4.18.0-553.136.1.el8_10
  • bpftool AlmaLinux 8 4.18.0-553.136.1.el8_10
  • kernel-core AlmaLinux 8 4.18.0-553.136.1.el8_10
  • kernel-tools AlmaLinux 8 4.18.0-553.136.1.el8_10
  • python3-perf AlmaLinux 8 4.18.0-553.136.1.el8_10
  • kernel-modules AlmaLinux 8 4.18.0-553.136.1.el8_10
  • kernel-zfcpdump AlmaLinux 8 4.18.0-553.136.1.el8_10

almalinux advisories ALSA-2026:27353ALSA-2026:27354ALSA-2026:25191ALSA-2026:25217ALSA-2026:13566

  • kernel Rocky Linux 8 4.18.0-553.136.1.el8_10
  • kernel-rt Rocky Linux 8 4.18.0-553.136.1.rt7.477.el8_10
  • kernel Rocky Linux 9 5.14.0-687.15.1.el9_7.cloud.1.0
  • kernel Rocky Linux 10 6.12.0-211.22.1.el10_2
  • kernel Rocky Linux 9 5.14.0-687.15.1.el9_8
  • kernel Rocky Linux 10 6.12.0-124.55.1.el10_1

rocky linux advisories RLSA-2026:27353RLSA-2026:27354RXSA-2026:25217RLSA-2026:25191RLSA-2026:25217RLSA-2026:13566

  • kernel Azure Linux 3.0 6.6.143.1-1

azure linux advisories AZL-82715

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-2026-31419 updated cvss 7.0

kernel: Linux kernel: Use-after-free in bonding driver leads to denial of service

  • 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
  • Red Hat CodeReady Linux Builder EUS (v.9.4) libperf 5.14.0-427.127.1.el9_4, kernel-debuginfo-common-s390x 5.14.0-427.127.1.el9_4, kernel-debuginfo-common-x86_64 5.14.0-427.127.1.el9_4, kernel-debuginfo-common-aarch64 5.14.0-427.127.1.el9_4, kernel-debuginfo-common-ppc64le 5.14.0-427.127.1.el9_4
    fixed: vendor fix RHSA-2026:21209
  • Red Hat CodeReady Linux Builder EUS (v.9.6) libperf 5.14.0-570.119.1.el9_6, kernel-debuginfo-common-s390x 5.14.0-570.119.1.el9_6, kernel-debuginfo-common-x86_64 5.14.0-570.119.1.el9_6, kernel-debuginfo-common-aarch64 5.14.0-570.119.1.el9_6, kernel-debuginfo-common-ppc64le 5.14.0-570.119.1.el9_6
    fixed: vendor fix RHSA-2026:23224
  • Red Hat Enterprise Linux AppStream (v. 9) rv 5.14.0-687.15.1.el9_8, perf 5.14.0-687.15.1.el9_8, rtla 5.14.0-687.15.1.el9_8, python3-perf 5.14.0-687.15.1.el9_8, kernel-devel-matched 5.14.0-687.15.1.el9_8, kernel-64k-devel-matched 5.14.0-687.15.1.el9_8, +7 more
    fixed: vendor fix RHSA-2026:25217
  • Red Hat Enterprise Linux AppStream (v. 10) rv 6.12.0-124.55.1.el10_1, rv 6.12.0-211.22.1.el10_2, perf 6.12.0-124.55.1.el10_1, perf 6.12.0-211.22.1.el10_2, rtla 6.12.0-124.55.1.el10_1, rtla 6.12.0-211.22.1.el10_2, +20 more
    fixed: vendor fix RHSA-2026:13566
  • Red Hat Enterprise Linux AppStream E4S (v.9.2) perf 5.14.0-284.174.1.el9_2, rtla 5.14.0-284.174.1.el9_2, kernel-devel-matched 5.14.0-284.174.1.el9_2, kernel-64k-devel-matched 5.14.0-284.174.1.el9_2, kernel-debug-devel-matched 5.14.0-284.174.1.el9_2, kernel-debuginfo-common-s390x 5.14.0-284.174.1.el9_2, +5 more
    fixed: vendor fix RHSA-2026:22940
  • Red Hat Enterprise Linux AppStream EUS (v. 10.0) rv 6.12.0-55.76.1.el10_0, perf 6.12.0-55.76.1.el10_0, rtla 6.12.0-55.76.1.el10_0, python3-perf 6.12.0-55.76.1.el10_0, kernel-devel-matched 6.12.0-55.76.1.el10_0, kernel-64k-devel-matched 6.12.0-55.76.1.el10_0, +7 more
    fixed: vendor fix RHSA-2026:22334
  • Red Hat Enterprise Linux AppStream EUS (v.9.4) rv 5.14.0-427.127.1.el9_4, perf 5.14.0-427.127.1.el9_4, rtla 5.14.0-427.127.1.el9_4, kernel-devel-matched 5.14.0-427.127.1.el9_4, kernel-64k-devel-matched 5.14.0-427.127.1.el9_4, kernel-debug-devel-matched 5.14.0-427.127.1.el9_4, +6 more
    fixed: vendor fix RHSA-2026:21209
show 30 more
  • Red Hat Enterprise Linux AppStream EUS (v.9.6) rv 5.14.0-570.119.1.el9_6, perf 5.14.0-570.119.1.el9_6, rtla 5.14.0-570.119.1.el9_6, python3-perf 5.14.0-570.119.1.el9_6, kernel-devel-matched 5.14.0-570.119.1.el9_6, kernel-64k-devel-matched 5.14.0-570.119.1.el9_6, +7 more
    fixed: vendor fix RHSA-2026:23224
  • Red Hat Enterprise Linux BaseOS (v. 8) perf 4.18.0-553.136.1.el8_10, kernel 4.18.0-553.136.1.el8_10, bpftool 4.18.0-553.136.1.el8_10, kernel-core 4.18.0-553.136.1.el8_10, kernel-tools 4.18.0-553.136.1.el8_10, python3-perf 4.18.0-553.136.1.el8_10, +20 more
    fixed: vendor fix RHSA-2026:27353
  • Red Hat Enterprise Linux BaseOS (v. 9) kernel 5.14.0-687.15.1.el9_8, kernel-64k 5.14.0-687.15.1.el9_8, kernel-core 5.14.0-687.15.1.el9_8, kernel-tools 5.14.0-687.15.1.el9_8, kernel-modules 5.14.0-687.15.1.el9_8, kernel-64k-core 5.14.0-687.15.1.el9_8, +28 more
    fixed: vendor fix RHSA-2026:25217
  • Red Hat Enterprise Linux BaseOS (v. 10) kernel 6.12.0-124.55.1.el10_1, kernel 6.12.0-211.22.1.el10_2, kernel-64k 6.12.0-124.55.1.el10_1, kernel-64k 6.12.0-211.22.1.el10_2, kernel-core 6.12.0-124.55.1.el10_1, kernel-core 6.12.0-211.22.1.el10_2, +63 more
    fixed: vendor fix RHSA-2026:13566
  • Red Hat Enterprise Linux BaseOS E4S (v.8.8) perf 4.18.0-477.143.1.el8_8, kernel 4.18.0-477.143.1.el8_8, bpftool 4.18.0-477.143.1.el8_8, kernel-core 4.18.0-477.143.1.el8_8, kernel-tools 4.18.0-477.143.1.el8_8, python3-perf 4.18.0-477.143.1.el8_8, +13 more
    fixed: vendor fix RHSA-2026:19521
  • Red Hat Enterprise Linux BaseOS E4S (v.9.2) bpftool 7.0.0-284.174.1.el9_2, kernel 5.14.0-284.174.1.el9_2, kernel-64k 5.14.0-284.174.1.el9_2, kernel-core 5.14.0-284.174.1.el9_2, kernel-tools 5.14.0-284.174.1.el9_2, python3-perf 5.14.0-284.174.1.el9_2, +33 more
    fixed: vendor fix RHSA-2026:22940
  • Red Hat Enterprise Linux BaseOS E4S (v.9.4) kpatch-patch-5_14_0-427_100_1 1-8.el9_4, kpatch-patch-5_14_0-427_113_1 1-6.el9_4, kpatch-patch-5_14_0-427_126_1 1-3.el9_4, kpatch-patch-5_14_0-427_68_2 1-15.el9_4, kpatch-patch-5_14_0-427_84_1 1-10.el9_4
    fixed: vendor fix RHSA-2026:36533
  • Red Hat Enterprise Linux BaseOS EUS (v. 10.0) kernel 6.12.0-55.76.1.el10_0, kernel-64k 6.12.0-55.76.1.el10_0, kernel-core 6.12.0-55.76.1.el10_0, kernel-tools 6.12.0-55.76.1.el10_0, kernel-modules 6.12.0-55.76.1.el10_0, kernel-64k-core 6.12.0-55.76.1.el10_0, +27 more
    fixed: vendor fix RHSA-2026:22334
  • Red Hat Enterprise Linux BaseOS EUS (v.9.4) bpftool 7.3.0-427.127.1.el9_4, kernel 5.14.0-427.127.1.el9_4, kernel-64k 5.14.0-427.127.1.el9_4, kernel-core 5.14.0-427.127.1.el9_4, kernel-tools 5.14.0-427.127.1.el9_4, python3-perf 5.14.0-427.127.1.el9_4, +28 more
    fixed: vendor fix RHSA-2026:21209
  • Red Hat Enterprise Linux BaseOS EUS (v.9.6) kernel 5.14.0-570.119.1.el9_6, kernel-64k 5.14.0-570.119.1.el9_6, kernel-core 5.14.0-570.119.1.el9_6, kernel-tools 5.14.0-570.119.1.el9_6, kernel-modules 5.14.0-570.119.1.el9_6, kernel-64k-core 5.14.0-570.119.1.el9_6, +32 more
    fixed: vendor fix RHSA-2026:23224
  • Red Hat Enterprise Linux BaseOS TUS (v.8.8) perf 4.18.0-477.143.1.el8_8, kernel 4.18.0-477.143.1.el8_8, bpftool 4.18.0-477.143.1.el8_8, kernel-core 4.18.0-477.143.1.el8_8, kernel-tools 4.18.0-477.143.1.el8_8, python3-perf 4.18.0-477.143.1.el8_8, +8 more
    fixed: vendor fix RHSA-2026:19521
  • Red Hat Enterprise Linux CodeReady Linux Builder (v. 9) libperf 5.14.0-687.15.1.el9_8, kernel-debuginfo-common-s390x 5.14.0-687.15.1.el9_8, kernel-debuginfo-common-x86_64 5.14.0-687.15.1.el9_8, kernel-debuginfo-common-aarch64 5.14.0-687.15.1.el9_8, kernel-debuginfo-common-ppc64le 5.14.0-687.15.1.el9_8
    fixed: vendor fix RHSA-2026:25217
  • Red Hat Enterprise Linux CodeReady Linux Builder (v. 10) libperf 6.12.0-124.55.1.el10_1, libperf 6.12.0-211.22.1.el10_2, kernel-debuginfo-common-s390x 6.12.0-124.55.1.el10_1, kernel-debuginfo-common-s390x 6.12.0-211.22.1.el10_2, kernel-debuginfo-common-x86_64 6.12.0-124.55.1.el10_1, kernel-debuginfo-common-x86_64 6.12.0-211.22.1.el10_2, +4 more
    fixed: vendor fix RHSA-2026:13566
  • Red Hat Enterprise Linux CodeReady Linux Builder EUS (v. 10.0) libperf 6.12.0-55.76.1.el10_0, kernel-debuginfo-common-s390x 6.12.0-55.76.1.el10_0, kernel-debuginfo-common-x86_64 6.12.0-55.76.1.el10_0, kernel-debuginfo-common-aarch64 6.12.0-55.76.1.el10_0, kernel-debuginfo-common-ppc64le 6.12.0-55.76.1.el10_0
    fixed: vendor fix RHSA-2026:22334
  • Red Hat Enterprise Linux CRB (v. 8) kernel-debuginfo-common-x86_64 4.18.0-553.136.1.el8_10, kernel-debuginfo-common-aarch64 4.18.0-553.136.1.el8_10, kernel-debuginfo-common-ppc64le 4.18.0-553.136.1.el8_10
    fixed: vendor fix RHSA-2026:27353
  • Red Hat Enterprise Linux NFV (v. 8) kernel-rt 4.18.0-553.136.1.rt7.477.el8_10, kernel-rt-kvm 4.18.0-553.136.1.rt7.477.el8_10, kernel-rt-core 4.18.0-553.136.1.rt7.477.el8_10, kernel-rt-modules 4.18.0-553.136.1.rt7.477.el8_10, kernel-rt-debug-kvm 4.18.0-553.136.1.rt7.477.el8_10, kernel-rt-debug-core 4.18.0-553.136.1.rt7.477.el8_10, +4 more
    fixed: vendor fix RHSA-2026:27354
  • Red Hat Enterprise Linux Real Time (v. 9) kernel-rt 5.14.0-687.15.1.el9_8, kernel-rt-64k 5.14.0-687.15.1.el9_8, kernel-rt-core 5.14.0-687.15.1.el9_8, kernel-rt-modules 5.14.0-687.15.1.el9_8, kernel-rt-64k-core 5.14.0-687.15.1.el9_8, kernel-rt-debug-core 5.14.0-687.15.1.el9_8, +14 more
    fixed: vendor fix RHSA-2026:25217
  • Red Hat Enterprise Linux Real Time (v. 10) kernel-rt 6.12.0-124.55.1.el10_1, kernel-rt 6.12.0-211.22.1.el10_2, kernel-rt-64k 6.12.0-124.55.1.el10_1, kernel-rt-64k 6.12.0-211.22.1.el10_2, kernel-rt-core 6.12.0-124.55.1.el10_1, kernel-rt-core 6.12.0-211.22.1.el10_2, +34 more
    fixed: vendor fix RHSA-2026:13566
  • Red Hat Enterprise Linux Real Time E4S (v.9.2) kernel-rt 5.14.0-284.174.1.rt14.459.el9_2, kernel-rt-core 5.14.0-284.174.1.rt14.459.el9_2, kernel-rt-modules 5.14.0-284.174.1.rt14.459.el9_2, kernel-rt-debug-core 5.14.0-284.174.1.rt14.459.el9_2, kernel-rt-modules-core 5.14.0-284.174.1.rt14.459.el9_2, kernel-rt-debug-modules 5.14.0-284.174.1.rt14.459.el9_2, +4 more
    fixed: vendor fix RHSA-2026:22900
  • Red Hat Enterprise Linux Real Time EUS (v. 10.0) kernel-rt 6.12.0-55.76.1.el10_0, kernel-rt-64k 6.12.0-55.76.1.el10_0, kernel-rt-core 6.12.0-55.76.1.el10_0, kernel-rt-modules 6.12.0-55.76.1.el10_0, kernel-rt-64k-core 6.12.0-55.76.1.el10_0, kernel-rt-debug-core 6.12.0-55.76.1.el10_0, +14 more
    fixed: vendor fix RHSA-2026:22334
  • Red Hat Enterprise Linux Real Time EUS (v.9.4) kernel-rt 5.14.0-427.127.1.el9_4, kernel-rt-core 5.14.0-427.127.1.el9_4, kernel-rt-modules 5.14.0-427.127.1.el9_4, kernel-rt-debug-core 5.14.0-427.127.1.el9_4, kernel-rt-modules-core 5.14.0-427.127.1.el9_4, kernel-rt-debug-modules 5.14.0-427.127.1.el9_4, +4 more
    fixed: vendor fix RHSA-2026:21209
  • Red Hat Enterprise Linux Real Time EUS (v.9.6) kernel-rt 5.14.0-570.119.1.el9_6, kernel-rt-64k 5.14.0-570.119.1.el9_6, kernel-rt-core 5.14.0-570.119.1.el9_6, kernel-rt-modules 5.14.0-570.119.1.el9_6, kernel-rt-64k-core 5.14.0-570.119.1.el9_6, kernel-rt-debug-core 5.14.0-570.119.1.el9_6, +14 more
    fixed: vendor fix RHSA-2026:23224
  • Red Hat Enterprise Linux Real Time for NFV (v. 9) kernel-rt 5.14.0-687.15.1.el9_8, kernel-rt-core 5.14.0-687.15.1.el9_8, kernel-rt-modules 5.14.0-687.15.1.el9_8, kernel-rt-debug-core 5.14.0-687.15.1.el9_8, kernel-rt-modules-core 5.14.0-687.15.1.el9_8, kernel-rt-debug-modules 5.14.0-687.15.1.el9_8, +4 more
    fixed: vendor fix RHSA-2026:25217
  • Red Hat Enterprise Linux Real Time for NFV (v. 10) kernel-rt 6.12.0-124.55.1.el10_1, kernel-rt 6.12.0-211.22.1.el10_2, kernel-rt-core 6.12.0-124.55.1.el10_1, kernel-rt-core 6.12.0-211.22.1.el10_2, kernel-rt-modules 6.12.0-124.55.1.el10_1, kernel-rt-modules 6.12.0-211.22.1.el10_2, +14 more
    fixed: vendor fix RHSA-2026:13566
  • Red Hat Enterprise Linux Real Time for NFV E4S (v.9.2) kernel-rt 5.14.0-284.174.1.rt14.459.el9_2, kernel-rt-kvm 5.14.0-284.174.1.rt14.459.el9_2, kernel-rt-core 5.14.0-284.174.1.rt14.459.el9_2, kernel-rt-modules 5.14.0-284.174.1.rt14.459.el9_2, kernel-rt-debug-kvm 5.14.0-284.174.1.rt14.459.el9_2, kernel-rt-debug-core 5.14.0-284.174.1.rt14.459.el9_2, +6 more
    fixed: vendor fix RHSA-2026:22900
  • Red Hat Enterprise Linux Real Time for NFV EUS (v. 10.0) kernel-rt 6.12.0-55.76.1.el10_0, kernel-rt-kvm 6.12.0-55.76.1.el10_0, kernel-rt-core 6.12.0-55.76.1.el10_0, kernel-rt-modules 6.12.0-55.76.1.el10_0, kernel-rt-debug-kvm 6.12.0-55.76.1.el10_0, kernel-rt-debug-core 6.12.0-55.76.1.el10_0, +6 more
    fixed: vendor fix RHSA-2026:22334
  • Red Hat Enterprise Linux Real Time for NFV EUS (v.9.4) kernel-rt 5.14.0-427.127.1.el9_4, kernel-rt-kvm 5.14.0-427.127.1.el9_4, kernel-rt-core 5.14.0-427.127.1.el9_4, kernel-rt-modules 5.14.0-427.127.1.el9_4, kernel-rt-debug-kvm 5.14.0-427.127.1.el9_4, kernel-rt-debug-core 5.14.0-427.127.1.el9_4, +6 more
    fixed: vendor fix RHSA-2026:21209
  • Red Hat Enterprise Linux Real Time for NFV EUS (v.9.6) kernel-rt 5.14.0-570.119.1.el9_6, kernel-rt-kvm 5.14.0-570.119.1.el9_6, kernel-rt-core 5.14.0-570.119.1.el9_6, kernel-rt-modules 5.14.0-570.119.1.el9_6, kernel-rt-debug-kvm 5.14.0-570.119.1.el9_6, kernel-rt-debug-core 5.14.0-570.119.1.el9_6, +6 more
    fixed: vendor fix RHSA-2026:23224
  • Red Hat Enterprise Linux RT (v. 8) kernel-rt 4.18.0-553.136.1.rt7.477.el8_10, kernel-rt-core 4.18.0-553.136.1.rt7.477.el8_10, kernel-rt-modules 4.18.0-553.136.1.rt7.477.el8_10, kernel-rt-debug-core 4.18.0-553.136.1.rt7.477.el8_10, kernel-rt-debug-modules 4.18.0-553.136.1.rt7.477.el8_10, kernel-rt-modules-extra 4.18.0-553.136.1.rt7.477.el8_10, +2 more
    fixed: vendor fix RHSA-2026:27354
  • 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
24 d ago

Exploit prediction

0.13% chance of exploitation in the next 30 days, higher than 2% 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
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 10
  • Red Hat Red Hat Enterprise Linux 10.0 Extended Update Support
  • Red Hat Red Hat Enterprise Linux 8
  • Red Hat Red Hat Enterprise Linux 8.8 Telecommunications Update Service
  • Red Hat Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions
  • Red Hat Red Hat Enterprise Linux 9
  • Red Hat Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions
  • Red Hat Red Hat Enterprise Linux 9.4 Extended Update Support
  • Red Hat Red Hat Enterprise Linux 9.4 Update Services for SAP Solutions
  • Red Hat Red Hat Enterprise Linux 9.6 Extended Update Support
  • Red Hat Red Hat Enterprise Linux 6
  • Red Hat Red Hat Enterprise Linux 7

Classification

Weakness
  • CWE-416 Use After Free
  • CWE-362 Concurrent Execution using Shared Resource with Improper Synchronization
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.