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Fencer Vulns
high 7.8

CVE-2026-52923 json

ipc: limit next_id allocation to the valid ID range

published 2026-06-24 4 mo ago modified 2026-10-19 20 d ago also EUVD-2026-38726

cvss
7.8
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.2%
EPSS 0.2% chance of exploitation in 30 days, percentile 12%
public exploits
0
none known

Summary

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

ipc: limit next_id allocation to the valid ID range

The checkpoint/restore sysctl path can request the next SysV IPC id through ids->next_id. ipc_idr_alloc() currently forwards that request to idr_alloc() with an open-ended upper bound.

If the valid tail of the SysV IPC id space is full, the allocation can spill beyond ipc_mni. The returned SysV IPC id still uses the normal index encoding, so later lookup and removal can target the wrong slot. This leaves the real IDR entry behind and breaks the IDR state for the object.

The bug is in ipc_idr_alloc() in the checkpoint/restore path.

1. ids->next_id is passed to:

idr_alloc(&ids->ipcs_idr, new, ipcid_to_idx(next_id), 0, ...)

2. The zero upper bound makes the allocation effectively open-ended. Once the valid SysV IPC tail is occupied, idr_alloc() can spill past ipc_mni and allocate an entry beyond the valid IPC id range.

3. The new object id is still encoded with the narrower SysV IPC index width:

new->id = (new->seq << ipcmni_seq_shift()) + idx

4. Later removal goes through ipc_rmid(), which uses:

ipcid_to_idx(ipcp->id)

That truncates the real IDR index. An object actually stored at a high index can then be removed as if it lived at a low in-range index.

5. For shared memory, shm_destroy() frees the current object anyway, but the real high IDR slot is left behind as a dangling pointer.

6. A subsequent walk of /proc/sysvipc/shm reaches the stale IDR entry and dereferences freed memory.

Prevent this by bounding the requested allocation to ipc_mni so the checkpoint/restore path fails once the valid range is exhausted.

Patch / fix

  • Linux Linux 5.10.259, 5.15.210, 6.1.176, 6.6.143, 6.12.93, 6.18.35, 7.0.12, 7.1
  • Red Hat Red Hat Enterprise Linux 10 0:6.12.0-211.46.1.el10_2
  • Red Hat Red Hat Enterprise Linux 10.0 Extended Update Support 0:6.12.0-55.95.1.el10_0
  • Red Hat Red Hat Enterprise Linux 7 Extended Lifecycle Support 0:3.10.0-1160.159.1.el7, 0:3.10.0-1160.159.1.rt56.1311.el7
  • Red Hat Red Hat Enterprise Linux 8 0:4.18.0-553.151.1.el8_10, 0:4.18.0-553.151.1.rt7.492.el8_10
  • Red Hat Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support 0:4.18.0-305.200.1.el8_4
  • Red Hat Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On 0:4.18.0-305.200.1.el8_4
  • Red Hat Red Hat Enterprise Linux 8.8 Telecommunications Update Service 0:4.18.0-477.158.1.el8_8
  • Red Hat Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions 0:4.18.0-477.158.1.el8_8
  • Red Hat Red Hat Enterprise Linux 9 0:5.14.0-687.33.1.el9_8
  • Red Hat Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions 0:5.14.0-284.186.1.el9_2, 0:5.14.0-284.186.1.rt14.471.el9_2
  • Red Hat Red Hat Enterprise Linux 9.4 Update Services for SAP Solutions 0:5.14.0-427.141.1.el9_4
  • Red Hat Red Hat Enterprise Linux 9.6 Extended Update Support 0:5.14.0-570.131.1.el9_6
  • linux Debian 12 6.1.176-1
  • linux Debian 13 6.12.94-1
  • linux Debian 14 7.0.12-1

debian advisories DEBIAN-CVE-2026-52923

  • linux Ubuntu 22.04 LTS 5.15.0-198.208
  • linux Ubuntu 24.04 LTS 6.8.0-146.146
  • linux Ubuntu 26.04 LTS 7.0.0-28.28
  • linux-aws Ubuntu 22.04 LTS 5.15.0-1117.124
  • linux-aws Ubuntu 24.04 LTS 6.8.0-1066.69
  • linux-aws Ubuntu 26.04 LTS 7.0.0-1009.9
  • linux-gcp Ubuntu 22.04 LTS 5.15.0-1118.128
  • linux-gcp Ubuntu 24.04 LTS 6.8.0-1070.78

ubuntu advisories UBUNTU-CVE-2026-52923

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 10.2 6.12.0-211.46.1.el10_2
  • rv RHEL 10.2 6.12.0-211.46.1.el10_2
  • perf RHEL 10.2 6.12.0-211.46.1.el10_2
  • rtla RHEL 10.2 6.12.0-211.46.1.el10_2
  • libperf RHEL 10.2 6.12.0-211.46.1.el10_2
  • kernel-rt RHEL 10.2 6.12.0-211.46.1.el10_2
  • kernel-64k RHEL 10.2 6.12.0-211.46.1.el10_2
  • kernel-core RHEL 10.2 6.12.0-211.46.1.el10_2

red hat advisories RHSA-2026:77216RHSA-2026:63189RHSA-2026:61692RHSA-2026:53330RHSA-2026:52764RHSA-2026:52649

  • kernel-livepatch-MICRO-6-0_Update_21 Linux Micro 6.1, Linux Micro 6.0 5-1.1
  • kernel-livepatch-MICRO-6-0_Update_22 Linux Micro 6.1, Linux Micro 6.0 5-1.1
  • kernel-livepatch-MICRO-6-0_Update_23 Linux Micro 6.1, Linux Micro 6.0 5-1.1
  • kernel-livepatch-MICRO-6-0_Update_24 Linux Micro 6.1, Linux Micro 6.0 4-1.1
  • kernel-livepatch-MICRO-6-0_Update_25 Linux Micro 6.1, Linux Micro 6.0 3-1.1
  • kernel-livepatch-MICRO-6-0-RT_Update_14 Linux Micro 6.1, Linux Micro 6.0 11-1.1
  • kernel-livepatch-MICRO-6-0-RT_Update_10 Linux Micro 6.1, Linux Micro 6.0 20-1.1
  • kernel-livepatch-MICRO-6-0-RT_Update_11 Linux Micro 6.1, Linux Micro 6.0 16-1.1

suse advisories SUSE-SU-2026:23483-1SUSE-SU-2026:23484-1SUSE-SU-2026:23485-1SUSE-SU-2026:23486-1SUSE-SU-2026:23487-1SUSE-SU-2026:23531-1

  • kernel-rt openSUSE Leap 16.0 6.12.0-160000.36.1
  • dtb-aarch64 openSUSE Leap 16.0 6.12.0-160000.36.1
  • kernel-64kb openSUSE Leap 16.0 6.12.0-160000.36.1
  • kernel-syms openSUSE Leap 16.0 6.12.0-160000.36.1
  • kernel-azure openSUSE Leap 16.0 6.12.0-160000.36.1
  • kernel-obs-qa openSUSE Leap 16.0 6.12.0-160000.36.1
  • kernel-source openSUSE Leap 16.0 6.12.0-160000.36.1
  • kernel-default openSUSE Leap 16.0 6.12.0-160000.36.1

opensuse advisories openSUSE-SU-2026:21388-1

  • kernel AlmaLinux 10 6.12.0-211.46.1.el10_2
  • rv AlmaLinux 10 6.12.0-211.46.1.el10_2
  • perf AlmaLinux 10 6.12.0-211.46.1.el10_2
  • rtla AlmaLinux 10 6.12.0-211.46.1.el10_2
  • libperf AlmaLinux 10 6.12.0-211.46.1.el10_2
  • kernel-rt AlmaLinux 10 6.12.0-211.46.1.el10_2
  • kernel-64k AlmaLinux 10 6.12.0-211.46.1.el10_2
  • kernel-core AlmaLinux 10 6.12.0-211.46.1.el10_2

almalinux advisories ALSA-2026:53330ALSA-2026:49851ALSA-2026:49857ALSA-2026:49212

  • kernel Rocky Linux 10 6.12.0-211.46.1.el10_2
  • kernel-rt Rocky Linux 8 4.18.0-553.151.1.rt7.492.el8_10
  • kernel Rocky Linux 8 4.18.0-553.151.1.el8_10
  • kernel Rocky Linux 8 4.18.0-553.151.1.el8_10.cloud.0.1
  • kernel Rocky Linux 9 5.14.0-687.33.1.el9_8

rocky linux advisories RLSA-2026:53330RLSA-2026:49851RLSA-2026:49857RXSA-2026:49857RLSA-2026:49212

  • kernel Azure Linux 3.0 6.6.143.1-1

azure linux advisories AZL-90638

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-2026-52923 updated cvss 7.8

kernel: ipc: limit next_id allocation to the valid ID range

  • Red Hat Enterprise Linux 6 perf, kernel, python-perf, kernel-kdump, kernel-firmware, kernel-bootwrapper, +1 more
    affected: workaround, no fix planned “Out of support scope”
  • 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.9.6) libperf 5.14.0-570.131.1.el9_6, kernel-debuginfo-common-s390x 5.14.0-570.131.1.el9_6, kernel-debuginfo-common-x86_64 5.14.0-570.131.1.el9_6, kernel-debuginfo-common-aarch64 5.14.0-570.131.1.el9_6, kernel-debuginfo-common-ppc64le 5.14.0-570.131.1.el9_6
    fixed: vendor fix RHSA-2026:49031
  • Red Hat Enterprise Linux AppStream (v. 9) rv 5.14.0-687.33.1.el9_8, perf 5.14.0-687.33.1.el9_8, rtla 5.14.0-687.33.1.el9_8, python3-perf 5.14.0-687.33.1.el9_8, kernel-devel-matched 5.14.0-687.33.1.el9_8, kernel-64k-devel-matched 5.14.0-687.33.1.el9_8, +7 more
    fixed: vendor fix RHSA-2026:49212
  • Red Hat Enterprise Linux AppStream (v. 10) rv 6.12.0-211.46.1.el10_2, perf 6.12.0-211.46.1.el10_2, rtla 6.12.0-211.46.1.el10_2, python3-perf 6.12.0-211.46.1.el10_2, kernel-devel-matched 6.12.0-211.46.1.el10_2, kernel-64k-devel-matched 6.12.0-211.46.1.el10_2, +7 more
    fixed: vendor fix RHSA-2026:53330
  • Red Hat Enterprise Linux AppStream E4S (v.9.2) perf 5.14.0-284.186.1.el9_2, rtla 5.14.0-284.186.1.el9_2, kernel-devel-matched 5.14.0-284.186.1.el9_2, kernel-64k-devel-matched 5.14.0-284.186.1.el9_2, kernel-debug-devel-matched 5.14.0-284.186.1.el9_2, kernel-debuginfo-common-s390x 5.14.0-284.186.1.el9_2, +5 more
    fixed: vendor fix RHSA-2026:51603
  • Red Hat Enterprise Linux AppStream E4S (v.9.4) rv 5.14.0-427.141.1.el9_4, perf 5.14.0-427.141.1.el9_4, rtla 5.14.0-427.141.1.el9_4, kernel-devel-matched 5.14.0-427.141.1.el9_4, kernel-64k-devel-matched 5.14.0-427.141.1.el9_4, kernel-debug-devel-matched 5.14.0-427.141.1.el9_4, +6 more
    fixed: vendor fix RHSA-2026:48386
  • Red Hat Enterprise Linux AppStream EUS (v. 10.0) rv 6.12.0-55.95.1.el10_0, perf 6.12.0-55.95.1.el10_0, rtla 6.12.0-55.95.1.el10_0, python3-perf 6.12.0-55.95.1.el10_0, kernel-devel-matched 6.12.0-55.95.1.el10_0, kernel-64k-devel-matched 6.12.0-55.95.1.el10_0, +7 more
    fixed: vendor fix RHSA-2026:52764
show 32 more
  • Red Hat Enterprise Linux AppStream EUS (v.9.6) rv 5.14.0-570.131.1.el9_6, perf 5.14.0-570.131.1.el9_6, rtla 5.14.0-570.131.1.el9_6, python3-perf 5.14.0-570.131.1.el9_6, kernel-devel-matched 5.14.0-570.131.1.el9_6, kernel-64k-devel-matched 5.14.0-570.131.1.el9_6, +7 more
    fixed: vendor fix RHSA-2026:49031
  • Red Hat Enterprise Linux BaseOS (v. 8) perf 4.18.0-553.151.1.el8_10, kernel 4.18.0-553.151.1.el8_10, bpftool 4.18.0-553.151.1.el8_10, kernel-core 4.18.0-553.151.1.el8_10, kernel-tools 4.18.0-553.151.1.el8_10, python3-perf 4.18.0-553.151.1.el8_10, +20 more
    fixed: vendor fix RHSA-2026:49857
  • Red Hat Enterprise Linux BaseOS (v. 9) kernel 5.14.0-687.33.1.el9_8, kernel-64k 5.14.0-687.33.1.el9_8, kernel-core 5.14.0-687.33.1.el9_8, kernel-tools 5.14.0-687.33.1.el9_8, kernel-modules 5.14.0-687.33.1.el9_8, kernel-64k-core 5.14.0-687.33.1.el9_8, +29 more
    fixed: vendor fix RHSA-2026:49212
  • Red Hat Enterprise Linux BaseOS (v. 10) kernel 6.12.0-211.46.1.el10_2, kernel-64k 6.12.0-211.46.1.el10_2, kernel-core 6.12.0-211.46.1.el10_2, kernel-tools 6.12.0-211.46.1.el10_2, kernel-modules 6.12.0-211.46.1.el10_2, kernel-64k-core 6.12.0-211.46.1.el10_2, +28 more
    fixed: vendor fix RHSA-2026:53330
  • Red Hat Enterprise Linux BaseOS AUS (v.8.4) perf 4.18.0-305.200.1.el8_4, kernel 4.18.0-305.200.1.el8_4, bpftool 4.18.0-305.200.1.el8_4, kernel-core 4.18.0-305.200.1.el8_4, kernel-tools 4.18.0-305.200.1.el8_4, python3-perf 4.18.0-305.200.1.el8_4, +8 more
    fixed: vendor fix RHSA-2026:47248
  • Red Hat Enterprise Linux BaseOS AUS (v.8.6) perf 4.18.0-372.220.1.el8_6, kernel 4.18.0-372.220.1.el8_6, bpftool 4.18.0-372.220.1.el8_6, kernel-core 4.18.0-372.220.1.el8_6, kernel-tools 4.18.0-372.220.1.el8_6, python3-perf 4.18.0-372.220.1.el8_6, +8 more
    fixed: vendor fix RHSA-2026:77216
  • Red Hat Enterprise Linux BaseOS E4S (v.8.8) perf 4.18.0-477.158.1.el8_8, kernel 4.18.0-477.158.1.el8_8, bpftool 4.18.0-477.158.1.el8_8, kernel-core 4.18.0-477.158.1.el8_8, kernel-tools 4.18.0-477.158.1.el8_8, python3-perf 4.18.0-477.158.1.el8_8, +14 more
    fixed: vendor fix RHSA-2026:52649
  • Red Hat Enterprise Linux BaseOS E4S (v.9.2) bpftool 7.0.0-284.186.1.el9_2, kernel 5.14.0-284.186.1.el9_2, kernel-64k 5.14.0-284.186.1.el9_2, kernel-core 5.14.0-284.186.1.el9_2, kernel-tools 5.14.0-284.186.1.el9_2, python3-perf 5.14.0-284.186.1.el9_2, +33 more
    fixed: vendor fix RHSA-2026:51603
  • Red Hat Enterprise Linux BaseOS E4S (v.9.4) bpftool 7.3.0-427.141.1.el9_4, kernel 5.14.0-427.141.1.el9_4, kernel-64k 5.14.0-427.141.1.el9_4, kernel-core 5.14.0-427.141.1.el9_4, kernel-tools 5.14.0-427.141.1.el9_4, python3-perf 5.14.0-427.141.1.el9_4, +33 more
    fixed: vendor fix RHSA-2026:48386
  • Red Hat Enterprise Linux BaseOS EUS (v. 10.0) kernel 6.12.0-55.95.1.el10_0, kernel-64k 6.12.0-55.95.1.el10_0, kernel-core 6.12.0-55.95.1.el10_0, kernel-tools 6.12.0-55.95.1.el10_0, kernel-modules 6.12.0-55.95.1.el10_0, kernel-64k-core 6.12.0-55.95.1.el10_0, +27 more
    fixed: vendor fix RHSA-2026:52764
  • Red Hat Enterprise Linux BaseOS EUS (v.9.6) kernel 5.14.0-570.131.1.el9_6, kernel-64k 5.14.0-570.131.1.el9_6, kernel-core 5.14.0-570.131.1.el9_6, kernel-tools 5.14.0-570.131.1.el9_6, kernel-modules 5.14.0-570.131.1.el9_6, kernel-64k-core 5.14.0-570.131.1.el9_6, +32 more
    fixed: vendor fix RHSA-2026:49031
  • Red Hat Enterprise Linux BaseOS EUS EXTENSION (v.8.4) perf 4.18.0-305.200.1.el8_4, kernel 4.18.0-305.200.1.el8_4, bpftool 4.18.0-305.200.1.el8_4, kernel-core 4.18.0-305.200.1.el8_4, kernel-tools 4.18.0-305.200.1.el8_4, python3-perf 4.18.0-305.200.1.el8_4, +8 more
    fixed: vendor fix RHSA-2026:47248
  • Red Hat Enterprise Linux BaseOS EUS EXTENSION (v.8.6) perf 4.18.0-372.220.1.el8_6, kernel 4.18.0-372.220.1.el8_6, bpftool 4.18.0-372.220.1.el8_6, kernel-core 4.18.0-372.220.1.el8_6, kernel-tools 4.18.0-372.220.1.el8_6, python3-perf 4.18.0-372.220.1.el8_6, +15 more
    fixed: vendor fix RHSA-2026:77216
  • Red Hat Enterprise Linux BaseOS TUS (v.8.8) perf 4.18.0-477.158.1.el8_8, kernel 4.18.0-477.158.1.el8_8, bpftool 4.18.0-477.158.1.el8_8, kernel-core 4.18.0-477.158.1.el8_8, kernel-tools 4.18.0-477.158.1.el8_8, python3-perf 4.18.0-477.158.1.el8_8, +8 more
    fixed: vendor fix RHSA-2026:52649
  • Red Hat Enterprise Linux CodeReady Linux Builder (v. 9) libperf 5.14.0-687.33.1.el9_8, kernel-debuginfo-common-s390x 5.14.0-687.33.1.el9_8, kernel-debuginfo-common-x86_64 5.14.0-687.33.1.el9_8, kernel-debuginfo-common-aarch64 5.14.0-687.33.1.el9_8, kernel-debuginfo-common-ppc64le 5.14.0-687.33.1.el9_8
    fixed: vendor fix RHSA-2026:49212
  • Red Hat Enterprise Linux CodeReady Linux Builder (v. 10) libperf 6.12.0-211.46.1.el10_2, kernel-debuginfo-common-s390x 6.12.0-211.46.1.el10_2, kernel-debuginfo-common-x86_64 6.12.0-211.46.1.el10_2, kernel-debuginfo-common-aarch64 6.12.0-211.46.1.el10_2, kernel-debuginfo-common-ppc64le 6.12.0-211.46.1.el10_2
    fixed: vendor fix RHSA-2026:53330
  • Red Hat Enterprise Linux CodeReady Linux Builder EUS (v. 10.0) libperf 6.12.0-55.95.1.el10_0, kernel-debuginfo-common-s390x 6.12.0-55.95.1.el10_0, kernel-debuginfo-common-x86_64 6.12.0-55.95.1.el10_0, kernel-debuginfo-common-aarch64 6.12.0-55.95.1.el10_0, kernel-debuginfo-common-ppc64le 6.12.0-55.95.1.el10_0
    fixed: vendor fix RHSA-2026:52764
  • Red Hat Enterprise Linux CRB (v. 8) kernel-debuginfo-common-x86_64 4.18.0-553.151.1.el8_10, kernel-debuginfo-common-aarch64 4.18.0-553.151.1.el8_10, kernel-debuginfo-common-ppc64le 4.18.0-553.151.1.el8_10
    fixed: vendor fix RHSA-2026:49857
  • Red Hat Enterprise Linux for Real Time (v. 7 ELS) kernel-rt 3.10.0-1160.159.1.rt56.1311.el7, kernel-rt-trace 3.10.0-1160.159.1.rt56.1311.el7, kernel-rt-debuginfo-common-x86_64 3.10.0-1160.159.1.rt56.1311.el7
    fixed: vendor fix RHSA-2026:63189
  • Red Hat Enterprise Linux NFV (v. 8) kernel-rt 4.18.0-553.151.1.rt7.492.el8_10, kernel-rt-kvm 4.18.0-553.151.1.rt7.492.el8_10, kernel-rt-core 4.18.0-553.151.1.rt7.492.el8_10, kernel-rt-modules 4.18.0-553.151.1.rt7.492.el8_10, kernel-rt-debug-kvm 4.18.0-553.151.1.rt7.492.el8_10, kernel-rt-debug-core 4.18.0-553.151.1.rt7.492.el8_10, +4 more
    fixed: vendor fix RHSA-2026:49851
  • Red Hat Enterprise Linux Real Time (v. 9) kernel-rt 5.14.0-687.33.1.el9_8, kernel-rt-64k 5.14.0-687.33.1.el9_8, kernel-rt-core 5.14.0-687.33.1.el9_8, kernel-rt-modules 5.14.0-687.33.1.el9_8, kernel-rt-64k-core 5.14.0-687.33.1.el9_8, kernel-rt-debug-core 5.14.0-687.33.1.el9_8, +14 more
    fixed: vendor fix RHSA-2026:49212
  • Red Hat Enterprise Linux Real Time (v. 10) kernel-rt 6.12.0-211.46.1.el10_2, kernel-rt-64k 6.12.0-211.46.1.el10_2, kernel-rt-core 6.12.0-211.46.1.el10_2, kernel-rt-modules 6.12.0-211.46.1.el10_2, kernel-rt-64k-core 6.12.0-211.46.1.el10_2, kernel-rt-debug-core 6.12.0-211.46.1.el10_2, +14 more
    fixed: vendor fix RHSA-2026:53330
  • Red Hat Enterprise Linux Real Time E4S (v.9.2) kernel-rt 5.14.0-284.186.1.rt14.471.el9_2, kernel-rt-core 5.14.0-284.186.1.rt14.471.el9_2, kernel-rt-modules 5.14.0-284.186.1.rt14.471.el9_2, kernel-rt-debug-core 5.14.0-284.186.1.rt14.471.el9_2, kernel-rt-modules-core 5.14.0-284.186.1.rt14.471.el9_2, kernel-rt-debug-modules 5.14.0-284.186.1.rt14.471.el9_2, +4 more
    fixed: vendor fix RHSA-2026:51604
  • Red Hat Enterprise Linux Real Time E4S (v.9.4) kernel-rt 5.14.0-427.141.1.el9_4, kernel-rt-core 5.14.0-427.141.1.el9_4, kernel-rt-modules 5.14.0-427.141.1.el9_4, kernel-rt-debug-core 5.14.0-427.141.1.el9_4, kernel-rt-modules-core 5.14.0-427.141.1.el9_4, kernel-rt-debug-modules 5.14.0-427.141.1.el9_4, +4 more
    fixed: vendor fix RHSA-2026:48386
  • Red Hat Enterprise Linux Real Time EUS (v. 10.0) kernel-rt 6.12.0-55.95.1.el10_0, kernel-rt-64k 6.12.0-55.95.1.el10_0, kernel-rt-core 6.12.0-55.95.1.el10_0, kernel-rt-modules 6.12.0-55.95.1.el10_0, kernel-rt-64k-core 6.12.0-55.95.1.el10_0, kernel-rt-debug-core 6.12.0-55.95.1.el10_0, +14 more
    fixed: vendor fix RHSA-2026:52764
  • Red Hat Enterprise Linux Real Time EUS (v.9.6) kernel-rt 5.14.0-570.131.1.el9_6, kernel-rt-64k 5.14.0-570.131.1.el9_6, kernel-rt-core 5.14.0-570.131.1.el9_6, kernel-rt-modules 5.14.0-570.131.1.el9_6, kernel-rt-64k-core 5.14.0-570.131.1.el9_6, kernel-rt-debug-core 5.14.0-570.131.1.el9_6, +14 more
    fixed: vendor fix RHSA-2026:49031
  • Red Hat Enterprise Linux Real Time for NFV (v. 9) kernel-rt 5.14.0-687.33.1.el9_8, kernel-rt-core 5.14.0-687.33.1.el9_8, kernel-rt-modules 5.14.0-687.33.1.el9_8, kernel-rt-debug-core 5.14.0-687.33.1.el9_8, kernel-rt-modules-core 5.14.0-687.33.1.el9_8, kernel-rt-debug-modules 5.14.0-687.33.1.el9_8, +4 more
    fixed: vendor fix RHSA-2026:49212
  • Red Hat Enterprise Linux Real Time for NFV (v. 10) kernel-rt 6.12.0-211.46.1.el10_2, kernel-rt-core 6.12.0-211.46.1.el10_2, kernel-rt-modules 6.12.0-211.46.1.el10_2, kernel-rt-debug-core 6.12.0-211.46.1.el10_2, kernel-rt-modules-core 6.12.0-211.46.1.el10_2, kernel-rt-debug-modules 6.12.0-211.46.1.el10_2, +4 more
    fixed: vendor fix RHSA-2026:53330
  • Red Hat Enterprise Linux Real Time for NFV E4S (v.9.2) kernel-rt 5.14.0-284.186.1.rt14.471.el9_2, kernel-rt-kvm 5.14.0-284.186.1.rt14.471.el9_2, kernel-rt-core 5.14.0-284.186.1.rt14.471.el9_2, kernel-rt-modules 5.14.0-284.186.1.rt14.471.el9_2, kernel-rt-debug-kvm 5.14.0-284.186.1.rt14.471.el9_2, kernel-rt-debug-core 5.14.0-284.186.1.rt14.471.el9_2, +6 more
    fixed: vendor fix RHSA-2026:51604
  • Red Hat Enterprise Linux Real Time for NFV E4S (v.9.4) kernel-rt 5.14.0-427.141.1.el9_4, kernel-rt-kvm 5.14.0-427.141.1.el9_4, kernel-rt-core 5.14.0-427.141.1.el9_4, kernel-rt-modules 5.14.0-427.141.1.el9_4, kernel-rt-debug-kvm 5.14.0-427.141.1.el9_4, kernel-rt-debug-core 5.14.0-427.141.1.el9_4, +6 more
    fixed: vendor fix RHSA-2026:48386
  • Red Hat Enterprise Linux Real Time for NFV EUS (v. 10.0) kernel-rt 6.12.0-55.95.1.el10_0, kernel-rt-kvm 6.12.0-55.95.1.el10_0, kernel-rt-core 6.12.0-55.95.1.el10_0, kernel-rt-modules 6.12.0-55.95.1.el10_0, kernel-rt-debug-kvm 6.12.0-55.95.1.el10_0, kernel-rt-debug-core 6.12.0-55.95.1.el10_0, +6 more
    fixed: vendor fix RHSA-2026:52764
  • Red Hat Enterprise Linux Real Time for NFV EUS (v.9.6) kernel-rt 5.14.0-570.131.1.el9_6, kernel-rt-kvm 5.14.0-570.131.1.el9_6, kernel-rt-core 5.14.0-570.131.1.el9_6, kernel-rt-modules 5.14.0-570.131.1.el9_6, kernel-rt-debug-kvm 5.14.0-570.131.1.el9_6, kernel-rt-debug-core 5.14.0-570.131.1.el9_6, +6 more
    fixed: vendor fix RHSA-2026:49031

3 more fixed 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-26-295-16 updated cvss 7.8

Siemens SIMATIC S7-1500 TM MFP

  • Siemens SIMATIC S7-1500 TM MFP - GNU/Linux subsystem
    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
no
Technical impact
total
Assessed
24 d ago

Exploit prediction

0.21% chance of exploitation in the next 30 days, higher than 12% 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 7.8 CVSS:3.1/AV:L/AC:L/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 7 Extended Lifecycle Support
  • Red Hat Red Hat Enterprise Linux 8
  • Red Hat Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support
  • Red Hat Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On
  • 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 Update Services for SAP Solutions
  • Red Hat Red Hat Enterprise Linux 9.6 Extended Update Support
  • Red Hat Red Hat Enterprise Linux 6
  • Siemens SIMATIC S7-1500 TM MFP - GNU/Linux subsystem

Classification

Weakness
  • CWE-825 Expired Pointer Dereference
  • CWE-20 Improper Input Validation
  • CWE-401 Missing Release of Memory after Effective Lifetime
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.