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Fencer Vulns
high 8.8

CVE-2026-46113 json

KVM: x86: Fix shadow paging use-after-free due to unexpected GFN

published 2026-05-28 5 mo ago modified 2026-10-19 20 d ago also EUVD-2026-32872

cvss
8.8
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 9%
public exploits
0
none known

Summary

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

KVM: x86: Fix shadow paging use-after-free due to unexpected GFN

The shadow MMU computes GFNs for direct shadow pages using sp->gfn plus the SPTE index. This assumption breaks for shadow paging if the guest page tables are modified between VM entries (similar to commit aad885e77496, "KVM: x86/mmu: Drop/zap existing present SPTE even when creating an MMIO SPTE", 2026-03-27). The flow is as follows:

- a PDE is installed for a 2MB mapping, and a page in that area is accessed. KVM creates a kvm_mmu_page consisting of 512 4KB pages; the kvm_mmu_page is marked by FNAME(fetch) as direct-mapped because the guest's mapping is a huge page (and thus contiguous).

- the PDE mapping is changed from outside the guest.

- the guest accesses another page in the same 2MB area. KVM installs a new leaf SPTE and rmap entry; the SPTE uses the "correct" GFN (i.e. based on the new mapping, as changed in the previous step) but that GFN is outside of the [sp->gfn, sp->gfn + 511] range; therefore the rmap entry cannot be found and removed when the kvm_mmu_page is zapped.

- the memslot that covers the first 2MB mapping is deleted, and the kvm_mmu_page for the now-invalid GPA is zapped. However, rmap_remove() only looks at the [sp->gfn, sp->gfn + 511] range established in step 1, and fails to find the rmap entry that was recorded by step 3.

- any operation that causes an rmap walk for the same page accessed by step 3 then walks a stale rmap and dereferences a freed kvm_mmu_page. This includes dirty logging or MMU notifier invalidations (e.g., from MADV_DONTNEED).

The underlying issue is that KVM's walking of shadow PTEs assumes that if a SPTE is present when KVM wants to install a non-leaf SPTE, then the existing kvm_mmu_page must be for the correct gfn. Because the only way for the gfn to be wrong is if KVM messed up and failed to zap a SPTE... which shouldn't happen, but *actually* only happens in response to a guest write.

That bug dates back literally forever, as even the first version of KVM assumes that the GFN matches and walks into the "wrong" shadow page. However, that was only an imprecision until 2032a93d66fa ("KVM: MMU: Don't allocate gfns page for direct mmu pages") came along.

Fix it by checking for a target gfn mismatch and zapping the existing SPTE. That way the old SP and rmap entries are gone, KVM installs the rmap in the right location, and everyone is happy.

Patch / fix

  • Linux Linux 5.15.222, 6.1.175, 6.6.140, 6.12.88, 6.18.30, 7.0.7, 7.1
  • linux Debian 12 6.1.176-1
  • linux Debian 13 6.12.88-1
  • linux Debian 14 7.0.7-1

debian advisories DEBIAN-CVE-2026-46113

  • linux Ubuntu 22.04 LTS 5.15.0-202.212
  • 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 5.15.0-1119.126
  • 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 5.15.0-1120.130
  • linux-gcp Ubuntu 24.04 LTS 6.8.0-1064.72

ubuntu advisories UBUNTU-CVE-2026-46113

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 8 4.18.0-553.143.1.el8_10
  • perf RHEL 8 4.18.0-553.143.1.el8_10
  • bpftool RHEL 8 4.18.0-553.143.1.el8_10
  • kernel-core RHEL 8 4.18.0-553.143.1.el8_10
  • kernel-tools RHEL 8 4.18.0-553.143.1.el8_10
  • python3-perf RHEL 8 4.18.0-553.143.1.el8_10
  • kernel-modules RHEL 8 4.18.0-553.143.1.el8_10
  • kernel-zfcpdump RHEL 8 4.18.0-553.143.1.el8_10

red hat advisories RHSA-2026:49033RHSA-2026:41229RHSA-2026:40082RHSA-2026:39983RHSA-2026:39371RHSA-2026:39083

  • kernel-default SLES 16.0, SLE High Availability Extension 16.0, Linux Micro 6.2 +1 more 6.12.0-160000.37.1
  • kernel-rt Linux Micro 6.2 6.12.0-160000.37.1
  • kernel-64kb SLES 16.0, Linux Micro 6.2, SLES for SAP applications 16.0 6.12.0-160000.37.1
  • kernel-source SLES 16.0, Linux Micro 6.2, SLES for SAP applications 16.0 6.12.0-160000.37.1
  • kernel-default-base SLES 16.0, Linux Micro 6.2, SLES for SAP applications 16.0 6.12.0-160000.37.1.160000.2.19
  • kernel-syms SLES 16.0, Linux Micro Extras 6.2, SLES for SAP applications 16.0 6.12.0-160000.37.1
  • kernel-azure SLES 16.0, SLES for SAP applications 16.0 6.12.0-160000.37.1
  • kernel-obs-qa SLES 16.0, SLES for SAP applications 16.0 6.12.0-160000.37.1

suse advisories SUSE-SU-2026:23237-1SUSE-SU-2026:23068-1SUSE-SU-2026:23221-1SUSE-SU-2026:23231-1SUSE-SU-2026:23066-1SUSE-SU-2026:23045-1

  • 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-2026:21555-1openSUSE-SU-2026:10954-1

  • kernel-rt AlmaLinux 8 4.18.0-553.143.1.rt7.484.el8_10
  • kernel-rt-core AlmaLinux 8 4.18.0-553.143.1.rt7.484.el8_10
  • kernel-rt-modules AlmaLinux 8 4.18.0-553.143.1.rt7.484.el8_10
  • kernel-rt-debug-core AlmaLinux 8 4.18.0-553.143.1.rt7.484.el8_10
  • kernel-rt-debug-modules AlmaLinux 8 4.18.0-553.143.1.rt7.484.el8_10
  • kernel-rt-modules-extra AlmaLinux 8 4.18.0-553.143.1.rt7.484.el8_10
  • kernel-rt-debug-modules-extra AlmaLinux 8 4.18.0-553.143.1.rt7.484.el8_10
  • kernel AlmaLinux 8 4.18.0-553.143.1.el8_10

almalinux advisories ALSA-2026:39082ALSA-2026:39083ALSA-2026:36956ALSA-2026:36957

  • kernel Rocky Linux 9 5.14.0-687.24.1.el9_8
  • kernel Rocky Linux 10 6.12.0-211.32.1.el10_2

rocky linux advisories RLSA-2026:36957RLSA-2026:36956

  • kernel Azure Linux 3.0 6.6.141.1-1

azure linux advisories AZL-88917

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-2026-46113 updated cvss 5.8

kernel: KVM: x86: Fix shadow paging use-after-free due to unexpected GFN

  • 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 “Fix deferred”
  • Red Hat CodeReady Linux Builder EUS (v.9.6) libperf 5.14.0-570.127.1.el9_6, kernel-debuginfo-common-s390x 5.14.0-570.127.1.el9_6, kernel-debuginfo-common-x86_64 5.14.0-570.127.1.el9_6, kernel-debuginfo-common-aarch64 5.14.0-570.127.1.el9_6, kernel-debuginfo-common-ppc64le 5.14.0-570.127.1.el9_6
    fixed: vendor fix RHSA-2026:38902
  • Red Hat Enterprise Linux AppStream (v. 9) rv 5.14.0-687.24.1.el9_8, perf 5.14.0-687.24.1.el9_8, rtla 5.14.0-687.24.1.el9_8, python3-perf 5.14.0-687.24.1.el9_8, kernel-devel-matched 5.14.0-687.24.1.el9_8, kernel-64k-devel-matched 5.14.0-687.24.1.el9_8, +7 more
    fixed: vendor fix RHSA-2026:36957
  • Red Hat Enterprise Linux AppStream (v. 10) rv 6.12.0-211.32.1.el10_2, perf 6.12.0-211.32.1.el10_2, rtla 6.12.0-211.32.1.el10_2, python3-perf 6.12.0-211.32.1.el10_2, kernel-devel-matched 6.12.0-211.32.1.el10_2, kernel-64k-devel-matched 6.12.0-211.32.1.el10_2, +7 more
    fixed: vendor fix RHSA-2026:36956
  • Red Hat Enterprise Linux AppStream E4S (v.9.2) perf 5.14.0-284.181.1.el9_2, rtla 5.14.0-284.181.1.el9_2, kernel-devel-matched 5.14.0-284.181.1.el9_2, kernel-64k-devel-matched 5.14.0-284.181.1.el9_2, kernel-debug-devel-matched 5.14.0-284.181.1.el9_2, kernel-debuginfo-common-s390x 5.14.0-284.181.1.el9_2, +5 more
    fixed: vendor fix RHSA-2026:40082
  • Red Hat Enterprise Linux AppStream E4S (v.9.4) rv 5.14.0-427.137.1.el9_4, perf 5.14.0-427.137.1.el9_4, rtla 5.14.0-427.137.1.el9_4, kernel-devel-matched 5.14.0-427.137.1.el9_4, kernel-64k-devel-matched 5.14.0-427.137.1.el9_4, kernel-debug-devel-matched 5.14.0-427.137.1.el9_4, +6 more
    fixed: vendor fix RHSA-2026:37729
  • Red Hat Enterprise Linux AppStream EUS (v. 10.0) rv 6.12.0-55.88.1.el10_0, perf 6.12.0-55.88.1.el10_0, rtla 6.12.0-55.88.1.el10_0, python3-perf 6.12.0-55.88.1.el10_0, kernel-devel-matched 6.12.0-55.88.1.el10_0, kernel-64k-devel-matched 6.12.0-55.88.1.el10_0, +7 more
    fixed: vendor fix RHSA-2026:39371
  • Red Hat Enterprise Linux AppStream EUS (v.9.6) rv 5.14.0-570.127.1.el9_6, perf 5.14.0-570.127.1.el9_6, rtla 5.14.0-570.127.1.el9_6, python3-perf 5.14.0-570.127.1.el9_6, kernel-devel-matched 5.14.0-570.127.1.el9_6, kernel-64k-devel-matched 5.14.0-570.127.1.el9_6, +7 more
    fixed: vendor fix RHSA-2026:38902
show 30 more
  • Red Hat Enterprise Linux BaseOS (v. 8) perf 4.18.0-553.143.1.el8_10, kernel 4.18.0-553.143.1.el8_10, bpftool 4.18.0-553.143.1.el8_10, kernel-core 4.18.0-553.143.1.el8_10, kernel-tools 4.18.0-553.143.1.el8_10, python3-perf 4.18.0-553.143.1.el8_10, +15 more
    fixed: vendor fix RHSA-2026:39083
  • Red Hat Enterprise Linux BaseOS (v. 9) kernel 5.14.0-687.24.1.el9_8, kernel-64k 5.14.0-687.24.1.el9_8, kernel-core 5.14.0-687.24.1.el9_8, kernel-tools 5.14.0-687.24.1.el9_8, kernel-modules 5.14.0-687.24.1.el9_8, kernel-64k-core 5.14.0-687.24.1.el9_8, +27 more
    fixed: vendor fix RHSA-2026:36957
  • Red Hat Enterprise Linux BaseOS (v. 10) kernel 6.12.0-211.32.1.el10_2, kernel-64k 6.12.0-211.32.1.el10_2, kernel-core 6.12.0-211.32.1.el10_2, kernel-tools 6.12.0-211.32.1.el10_2, kernel-modules 6.12.0-211.32.1.el10_2, kernel-64k-core 6.12.0-211.32.1.el10_2, +28 more
    fixed: vendor fix RHSA-2026:36956
  • Red Hat Enterprise Linux BaseOS AUS (v.8.6) perf 4.18.0-372.204.1.el8_6, kernel 4.18.0-372.204.1.el8_6, bpftool 4.18.0-372.204.1.el8_6, kernel-core 4.18.0-372.204.1.el8_6, kernel-tools 4.18.0-372.204.1.el8_6, python3-perf 4.18.0-372.204.1.el8_6, +8 more
    fixed: vendor fix RHSA-2026:49033
  • Red Hat Enterprise Linux BaseOS E4S (v.8.8) perf 4.18.0-477.154.1.el8_8, kernel 4.18.0-477.154.1.el8_8, bpftool 4.18.0-477.154.1.el8_8, kernel-core 4.18.0-477.154.1.el8_8, kernel-tools 4.18.0-477.154.1.el8_8, python3-perf 4.18.0-477.154.1.el8_8, +9 more
    fixed: vendor fix RHSA-2026:41229
  • Red Hat Enterprise Linux BaseOS E4S (v.9.2) bpftool 7.0.0-284.181.1.el9_2, kernel 5.14.0-284.181.1.el9_2, kernel-64k 5.14.0-284.181.1.el9_2, kernel-core 5.14.0-284.181.1.el9_2, kernel-tools 5.14.0-284.181.1.el9_2, python3-perf 5.14.0-284.181.1.el9_2, +28 more
    fixed: vendor fix RHSA-2026:40082
  • Red Hat Enterprise Linux BaseOS E4S (v.9.4) bpftool 7.3.0-427.137.1.el9_4, kernel 5.14.0-427.137.1.el9_4, kernel-64k 5.14.0-427.137.1.el9_4, kernel-core 5.14.0-427.137.1.el9_4, kernel-tools 5.14.0-427.137.1.el9_4, python3-perf 5.14.0-427.137.1.el9_4, +28 more
    fixed: vendor fix RHSA-2026:37729
  • Red Hat Enterprise Linux BaseOS EUS (v. 10.0) kernel 6.12.0-55.88.1.el10_0, kernel-64k 6.12.0-55.88.1.el10_0, kernel-core 6.12.0-55.88.1.el10_0, kernel-tools 6.12.0-55.88.1.el10_0, kernel-modules 6.12.0-55.88.1.el10_0, kernel-64k-core 6.12.0-55.88.1.el10_0, +27 more
    fixed: vendor fix RHSA-2026:39371
  • Red Hat Enterprise Linux BaseOS EUS (v.9.6) kernel 5.14.0-570.127.1.el9_6, kernel-64k 5.14.0-570.127.1.el9_6, kernel-core 5.14.0-570.127.1.el9_6, kernel-tools 5.14.0-570.127.1.el9_6, kernel-modules 5.14.0-570.127.1.el9_6, kernel-64k-core 5.14.0-570.127.1.el9_6, +27 more
    fixed: vendor fix RHSA-2026:38902
  • Red Hat Enterprise Linux BaseOS EUS EXTENSION (v.8.6) perf 4.18.0-372.204.1.el8_6, kernel 4.18.0-372.204.1.el8_6, bpftool 4.18.0-372.204.1.el8_6, kernel-core 4.18.0-372.204.1.el8_6, kernel-tools 4.18.0-372.204.1.el8_6, python3-perf 4.18.0-372.204.1.el8_6, +8 more
    fixed: vendor fix RHSA-2026:49033
  • Red Hat Enterprise Linux BaseOS TUS (v.8.8) perf 4.18.0-477.154.1.el8_8, kernel 4.18.0-477.154.1.el8_8, bpftool 4.18.0-477.154.1.el8_8, kernel-core 4.18.0-477.154.1.el8_8, kernel-tools 4.18.0-477.154.1.el8_8, python3-perf 4.18.0-477.154.1.el8_8, +8 more
    fixed: vendor fix RHSA-2026:41229
  • Red Hat Enterprise Linux CodeReady Linux Builder (v. 9) libperf 5.14.0-687.24.1.el9_8, kernel-debuginfo-common-s390x 5.14.0-687.24.1.el9_8, kernel-debuginfo-common-x86_64 5.14.0-687.24.1.el9_8, kernel-debuginfo-common-aarch64 5.14.0-687.24.1.el9_8, kernel-debuginfo-common-ppc64le 5.14.0-687.24.1.el9_8
    fixed: vendor fix RHSA-2026:36957
  • Red Hat Enterprise Linux CodeReady Linux Builder (v. 10) libperf 6.12.0-211.32.1.el10_2, kernel-debuginfo-common-s390x 6.12.0-211.32.1.el10_2, kernel-debuginfo-common-x86_64 6.12.0-211.32.1.el10_2, kernel-debuginfo-common-aarch64 6.12.0-211.32.1.el10_2, kernel-debuginfo-common-ppc64le 6.12.0-211.32.1.el10_2
    fixed: vendor fix RHSA-2026:36956
  • Red Hat Enterprise Linux CodeReady Linux Builder EUS (v. 10.0) libperf 6.12.0-55.88.1.el10_0, kernel-debuginfo-common-s390x 6.12.0-55.88.1.el10_0, kernel-debuginfo-common-x86_64 6.12.0-55.88.1.el10_0, kernel-debuginfo-common-aarch64 6.12.0-55.88.1.el10_0, kernel-debuginfo-common-ppc64le 6.12.0-55.88.1.el10_0
    fixed: vendor fix RHSA-2026:39371
  • Red Hat Enterprise Linux CRB (v. 8) kernel-debuginfo-common-x86_64 4.18.0-553.143.1.el8_10, kernel-debuginfo-common-aarch64 4.18.0-553.143.1.el8_10, kernel-debuginfo-common-ppc64le 4.18.0-553.143.1.el8_10
    fixed: vendor fix RHSA-2026:39083
  • Red Hat Enterprise Linux NFV (v. 8) kernel-rt 4.18.0-553.143.1.rt7.484.el8_10, kernel-rt-kvm 4.18.0-553.143.1.rt7.484.el8_10, kernel-rt-core 4.18.0-553.143.1.rt7.484.el8_10, kernel-rt-modules 4.18.0-553.143.1.rt7.484.el8_10, kernel-rt-debug-kvm 4.18.0-553.143.1.rt7.484.el8_10, kernel-rt-debug-core 4.18.0-553.143.1.rt7.484.el8_10, +4 more
    fixed: vendor fix RHSA-2026:39082
  • Red Hat Enterprise Linux Real Time (v. 9) kernel-rt 5.14.0-687.24.1.el9_8, kernel-rt-64k 5.14.0-687.24.1.el9_8, kernel-rt-core 5.14.0-687.24.1.el9_8, kernel-rt-modules 5.14.0-687.24.1.el9_8, kernel-rt-64k-core 5.14.0-687.24.1.el9_8, kernel-rt-debug-core 5.14.0-687.24.1.el9_8, +14 more
    fixed: vendor fix RHSA-2026:36957
  • Red Hat Enterprise Linux Real Time (v. 10) kernel-rt 6.12.0-211.32.1.el10_2, kernel-rt-64k 6.12.0-211.32.1.el10_2, kernel-rt-core 6.12.0-211.32.1.el10_2, kernel-rt-modules 6.12.0-211.32.1.el10_2, kernel-rt-64k-core 6.12.0-211.32.1.el10_2, kernel-rt-debug-core 6.12.0-211.32.1.el10_2, +14 more
    fixed: vendor fix RHSA-2026:36956
  • Red Hat Enterprise Linux Real Time E4S (v.9.2) kernel-rt 5.14.0-284.181.1.rt14.466.el9_2, kernel-rt-core 5.14.0-284.181.1.rt14.466.el9_2, kernel-rt-modules 5.14.0-284.181.1.rt14.466.el9_2, kernel-rt-debug-core 5.14.0-284.181.1.rt14.466.el9_2, kernel-rt-modules-core 5.14.0-284.181.1.rt14.466.el9_2, kernel-rt-debug-modules 5.14.0-284.181.1.rt14.466.el9_2, +4 more
    fixed: vendor fix RHSA-2026:39983
  • Red Hat Enterprise Linux Real Time E4S (v.9.4) kernel-rt 5.14.0-427.137.1.el9_4, kernel-rt-core 5.14.0-427.137.1.el9_4, kernel-rt-modules 5.14.0-427.137.1.el9_4, kernel-rt-debug-core 5.14.0-427.137.1.el9_4, kernel-rt-modules-core 5.14.0-427.137.1.el9_4, kernel-rt-debug-modules 5.14.0-427.137.1.el9_4, +4 more
    fixed: vendor fix RHSA-2026:37729
  • Red Hat Enterprise Linux Real Time EUS (v. 10.0) kernel-rt 6.12.0-55.88.1.el10_0, kernel-rt-64k 6.12.0-55.88.1.el10_0, kernel-rt-core 6.12.0-55.88.1.el10_0, kernel-rt-modules 6.12.0-55.88.1.el10_0, kernel-rt-64k-core 6.12.0-55.88.1.el10_0, kernel-rt-debug-core 6.12.0-55.88.1.el10_0, +14 more
    fixed: vendor fix RHSA-2026:39371
  • Red Hat Enterprise Linux Real Time EUS (v.9.6) kernel-rt 5.14.0-570.127.1.el9_6, kernel-rt-64k 5.14.0-570.127.1.el9_6, kernel-rt-core 5.14.0-570.127.1.el9_6, kernel-rt-modules 5.14.0-570.127.1.el9_6, kernel-rt-64k-core 5.14.0-570.127.1.el9_6, kernel-rt-debug-core 5.14.0-570.127.1.el9_6, +14 more
    fixed: vendor fix RHSA-2026:38902
  • Red Hat Enterprise Linux Real Time for NFV (v. 9) kernel-rt 5.14.0-687.24.1.el9_8, kernel-rt-core 5.14.0-687.24.1.el9_8, kernel-rt-modules 5.14.0-687.24.1.el9_8, kernel-rt-debug-core 5.14.0-687.24.1.el9_8, kernel-rt-modules-core 5.14.0-687.24.1.el9_8, kernel-rt-debug-modules 5.14.0-687.24.1.el9_8, +4 more
    fixed: vendor fix RHSA-2026:36957
  • Red Hat Enterprise Linux Real Time for NFV (v. 10) kernel-rt 6.12.0-211.32.1.el10_2, kernel-rt-core 6.12.0-211.32.1.el10_2, kernel-rt-modules 6.12.0-211.32.1.el10_2, kernel-rt-debug-core 6.12.0-211.32.1.el10_2, kernel-rt-modules-core 6.12.0-211.32.1.el10_2, kernel-rt-debug-modules 6.12.0-211.32.1.el10_2, +4 more
    fixed: vendor fix RHSA-2026:36956
  • Red Hat Enterprise Linux Real Time for NFV E4S (v.9.2) kernel-rt 5.14.0-284.181.1.rt14.466.el9_2, kernel-rt-kvm 5.14.0-284.181.1.rt14.466.el9_2, kernel-rt-core 5.14.0-284.181.1.rt14.466.el9_2, kernel-rt-modules 5.14.0-284.181.1.rt14.466.el9_2, kernel-rt-debug-kvm 5.14.0-284.181.1.rt14.466.el9_2, kernel-rt-debug-core 5.14.0-284.181.1.rt14.466.el9_2, +6 more
    fixed: vendor fix RHSA-2026:39983
  • Red Hat Enterprise Linux Real Time for NFV E4S (v.9.4) kernel-rt 5.14.0-427.137.1.el9_4, kernel-rt-kvm 5.14.0-427.137.1.el9_4, kernel-rt-core 5.14.0-427.137.1.el9_4, kernel-rt-modules 5.14.0-427.137.1.el9_4, kernel-rt-debug-kvm 5.14.0-427.137.1.el9_4, kernel-rt-debug-core 5.14.0-427.137.1.el9_4, +6 more
    fixed: vendor fix RHSA-2026:37729
  • Red Hat Enterprise Linux Real Time for NFV EUS (v. 10.0) kernel-rt 6.12.0-55.88.1.el10_0, kernel-rt-kvm 6.12.0-55.88.1.el10_0, kernel-rt-core 6.12.0-55.88.1.el10_0, kernel-rt-modules 6.12.0-55.88.1.el10_0, kernel-rt-debug-kvm 6.12.0-55.88.1.el10_0, kernel-rt-debug-core 6.12.0-55.88.1.el10_0, +6 more
    fixed: vendor fix RHSA-2026:39371
  • Red Hat Enterprise Linux Real Time for NFV EUS (v.9.6) kernel-rt 5.14.0-570.127.1.el9_6, kernel-rt-kvm 5.14.0-570.127.1.el9_6, kernel-rt-core 5.14.0-570.127.1.el9_6, kernel-rt-modules 5.14.0-570.127.1.el9_6, kernel-rt-debug-kvm 5.14.0-570.127.1.el9_6, kernel-rt-debug-core 5.14.0-570.127.1.el9_6, +6 more
    fixed: vendor fix RHSA-2026:38902
  • Red Hat Enterprise Linux RT (v. 8) kernel-rt 4.18.0-553.143.1.rt7.484.el8_10, kernel-rt-core 4.18.0-553.143.1.rt7.484.el8_10, kernel-rt-modules 4.18.0-553.143.1.rt7.484.el8_10, kernel-rt-debug-core 4.18.0-553.143.1.rt7.484.el8_10, kernel-rt-debug-modules 4.18.0-553.143.1.rt7.484.el8_10, kernel-rt-modules-extra 4.18.0-553.143.1.rt7.484.el8_10, +2 more
    fixed: vendor fix RHSA-2026:39082
  • 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 ICSA-26-295-16 updated cvss 8.8

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
23 d ago

Exploit prediction

0.19% chance of exploitation in the next 30 days, higher than 9% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CNA 3.1 8.8 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H

Affected products

  • Linux Linux
  • Siemens SIMATIC S7-1500 TM MFP - GNU/Linux subsystem

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.