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Fencer Vulns
critical 9.3

CVE-2026-46316 in the critical feed json

KVM: arm64: vgic-its: Drop the translation cache reference only for the erased entry

published 2026-06-09 5 mo ago modified 2026-10-19 20 d ago also EUVD-2026-35405

cvss
9.3
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 27%
public exploits
0
none known

Summary

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

KVM: arm64: vgic-its: Drop the translation cache reference only for the erased entry

vgic_its_invalidate_cache() walks the per-ITS translation cache with xa_for_each() and drops the cache's reference on each entry with vgic_put_irq(). It puts the iterated pointer, though, rather than the value returned by xa_erase().

The function is called from contexts that do not exclude one another: the ITS command handlers hold its_lock, the GITS_CTLR write path holds cmd_lock, and the path that clears EnableLPIs in a redistributor's GICR_CTLR holds neither. Two or more of them can drain the same cache concurrently, and if each one observes the same entry, erases it and then puts it, the single reference the cache holds on that entry is dropped more than once. The entry can then be freed while an ITE still maps it.

xa_erase() is atomic and returns the previous entry, so put only the entry that this context actually removed. The cache reference is then dropped exactly once per entry even when the invalidations run concurrently, and the behavior is unchanged when only one context runs.

Patch / fix

  • Linux Linux 6.12.93, 6.18.35, 7.0.12, 7.1
  • Red Hat Red Hat Enterprise Linux 10 0:6.12.0-211.30.1.el10_2
  • Red Hat Red Hat Enterprise Linux 10.0 Extended Update Support 0:6.12.0-55.88.1.el10_0
  • Red Hat Red Hat Enterprise Linux 9 0:5.14.0-687.22.1.el9_8
  • Red Hat Red Hat Enterprise Linux 9.6 Extended Update Support 0:5.14.0-570.127.1.el9_6
  • Red Hat Red Hat OpenShift Container Platform 4.19 4.19.9.6.202607220857-0
  • Red Hat Red Hat OpenShift Container Platform 4.20 4.20.9.6.202607151937-0
  • Red Hat Red Hat OpenShift Container Platform 4.21 4.21.9.6.202607151836-0
  • Red Hat Red Hat OpenShift Container Platform 4.22 4.22.9.8.202607152026-0
  • linux Debian 13 6.12.94-1
  • linux Debian 14 7.0.12-1

debian advisories DEBIAN-CVE-2026-46316

  • linux Ubuntu 25.10 6.17.0-40.40
  • linux Ubuntu 26.04 LTS 7.0.0-27.27
  • linux-aws Ubuntu 25.10 6.17.0-1019.19
  • linux-aws Ubuntu 26.04 LTS 7.0.0-1008.8
  • linux-gcp Ubuntu 25.10 6.17.0-1020.22
  • linux-gcp Ubuntu 26.04 LTS 7.0.0-1007.7
  • linux-ibm Ubuntu 26.04 LTS 7.0.0-1009.9
  • linux-azure Ubuntu 26.04 LTS 7.0.0-1010.10

ubuntu advisories UBUNTU-CVE-2026-46316

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 5.14.0-687.22.1.el9_8
  • rv RHEL 9 5.14.0-687.22.1.el9_8
  • perf RHEL 9 5.14.0-687.22.1.el9_8
  • rtla RHEL 9 5.14.0-687.22.1.el9_8
  • libperf RHEL 9 5.14.0-687.22.1.el9_8
  • kernel-rt RHEL 9 5.14.0-687.22.1.el9_8
  • kernel-64k RHEL 9 5.14.0-687.22.1.el9_8
  • kernel-core RHEL 9 5.14.0-687.22.1.el9_8

red hat advisories RHSA-2026:39371RHSA-2026:38902RHSA-2026:36018RHSA-2026:34911

  • kernel-rt Linux Micro 6.2 6.12.0-160000.35.1
  • kernel-64kb SLES 16.0, Linux Micro 6.2, SLES for SAP applications 16.0 6.12.0-160000.35.1
  • kernel-source SLES 16.0, Linux Micro 6.2, SLES for SAP applications 16.0 6.12.0-160000.35.1
  • kernel-default SLES 16.0, SLE High Availability Extension 16.0, Linux Micro 6.2 +1 more 6.12.0-160000.35.1
  • kernel-default-base SLES 16.0, Linux Micro 6.2, SLES for SAP applications 16.0 6.12.0-160000.35.1.160000.2.16
  • kernel-syms SLES 16.0, Linux Micro Extras 6.2, SLES for SAP applications 16.0 6.12.0-160000.35.1
  • kernel-azure SLES for SAP applications 16.0, SLES 16.0 6.12.0-160000.35.1
  • kernel-obs-qa SLES for SAP applications 16.0, SLES 16.0 6.12.0-160000.35.1

suse advisories SUSE-SU-2026:22112-1SUSE-SU-2026:22127-1SUSE-SU-2026:22117-1SUSE-SU-2026:22099-1

  • kernel-rt openSUSE Leap 16.0 6.12.0-160000.35.1
  • dtb-aarch64 openSUSE Leap 16.0 6.12.0-160000.35.1
  • kernel-64kb openSUSE Leap 16.0 6.12.0-160000.35.1
  • kernel-syms openSUSE Leap 16.0 6.12.0-160000.35.1
  • kernel-azure openSUSE Leap 16.0 6.12.0-160000.35.1
  • kernel-obs-qa openSUSE Leap 16.0 6.12.0-160000.35.1
  • kernel-source openSUSE Leap 16.0 6.12.0-160000.35.1
  • kernel-default openSUSE Leap 16.0 6.12.0-160000.35.1

opensuse advisories openSUSE-SU-2026:20965-1openSUSE-SU-2026:11014-1

  • kernel AlmaLinux 9 5.14.0-687.22.1.el9_8
  • rv AlmaLinux 9 5.14.0-687.22.1.el9_8
  • perf AlmaLinux 9 5.14.0-687.22.1.el9_8
  • rtla AlmaLinux 9 5.14.0-687.22.1.el9_8
  • libperf AlmaLinux 9 5.14.0-687.22.1.el9_8
  • kernel-rt AlmaLinux 9 5.14.0-687.22.1.el9_8
  • kernel-64k AlmaLinux 9 5.14.0-687.22.1.el9_8
  • kernel-core AlmaLinux 9 5.14.0-687.22.1.el9_8

almalinux advisories ALSA-2026:36018ALSA-2026:34911ALSA-2026:30848ALSA-2026:30129

  • kernel Rocky Linux 9 5.14.0-687.22.1.el9_8

rocky linux advisories RLSA-2026:36018

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-2026-46316 updated cvss 7.0

kernel: KVM: arm64: vgic-its: Drop the translation cache reference only for the erased entry

  • Red Hat Enterprise Linux for NVIDIA 26 kernel Red Hat OpenShift Container Platform 5 openshift/ose-rhel-coreos-9
    affected: no fix available
  • 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 5.14.0-687.22.1.el9_8, perf 5.14.0-687.22.1.el9_8, rtla 5.14.0-687.22.1.el9_8, python3-perf 5.14.0-687.22.1.el9_8, kernel-devel-matched 5.14.0-687.22.1.el9_8, kernel-64k-devel-matched 5.14.0-687.22.1.el9_8, +7 more
    fixed: vendor fix RHSA-2026:36018
  • Red Hat Enterprise Linux AppStream (v. 10) rv 6.12.0-211.30.1.el10_2, perf 6.12.0-211.30.1.el10_2, rtla 6.12.0-211.30.1.el10_2, python3-perf 6.12.0-211.30.1.el10_2, kernel-devel-matched 6.12.0-211.30.1.el10_2, kernel-64k-devel-matched 6.12.0-211.30.1.el10_2, +7 more
    fixed: vendor fix RHSA-2026:34911
  • 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
  • Red Hat Enterprise Linux BaseOS (v. 9) kernel 5.14.0-687.22.1.el9_8, kernel-64k 5.14.0-687.22.1.el9_8, kernel-core 5.14.0-687.22.1.el9_8, kernel-tools 5.14.0-687.22.1.el9_8, kernel-modules 5.14.0-687.22.1.el9_8, kernel-64k-core 5.14.0-687.22.1.el9_8, +27 more
    fixed: vendor fix RHSA-2026:36018
  • Red Hat Enterprise Linux BaseOS (v. 10) kernel 6.12.0-211.30.1.el10_2, kernel-64k 6.12.0-211.30.1.el10_2, kernel-core 6.12.0-211.30.1.el10_2, kernel-tools 6.12.0-211.30.1.el10_2, kernel-modules 6.12.0-211.30.1.el10_2, kernel-64k-core 6.12.0-211.30.1.el10_2, +28 more
    fixed: vendor fix RHSA-2026:34911
show 18 more
  • 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 CodeReady Linux Builder (v. 9) libperf 5.14.0-687.22.1.el9_8, kernel-debuginfo-common-s390x 5.14.0-687.22.1.el9_8, kernel-debuginfo-common-x86_64 5.14.0-687.22.1.el9_8, kernel-debuginfo-common-aarch64 5.14.0-687.22.1.el9_8, kernel-debuginfo-common-ppc64le 5.14.0-687.22.1.el9_8
    fixed: vendor fix RHSA-2026:36018
  • Red Hat Enterprise Linux CodeReady Linux Builder (v. 10) libperf 6.12.0-211.30.1.el10_2, kernel-debuginfo-common-s390x 6.12.0-211.30.1.el10_2, kernel-debuginfo-common-x86_64 6.12.0-211.30.1.el10_2, kernel-debuginfo-common-aarch64 6.12.0-211.30.1.el10_2, kernel-debuginfo-common-ppc64le 6.12.0-211.30.1.el10_2
    fixed: vendor fix RHSA-2026:34911
  • 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 Real Time (v. 9) kernel-rt 5.14.0-687.22.1.el9_8, kernel-rt-64k 5.14.0-687.22.1.el9_8, kernel-rt-core 5.14.0-687.22.1.el9_8, kernel-rt-modules 5.14.0-687.22.1.el9_8, kernel-rt-64k-core 5.14.0-687.22.1.el9_8, kernel-rt-debug-core 5.14.0-687.22.1.el9_8, +14 more
    fixed: vendor fix RHSA-2026:36018
  • Red Hat Enterprise Linux Real Time (v. 10) kernel-rt 6.12.0-211.30.1.el10_2, kernel-rt-64k 6.12.0-211.30.1.el10_2, kernel-rt-core 6.12.0-211.30.1.el10_2, kernel-rt-modules 6.12.0-211.30.1.el10_2, kernel-rt-64k-core 6.12.0-211.30.1.el10_2, kernel-rt-debug-core 6.12.0-211.30.1.el10_2, +14 more
    fixed: vendor fix RHSA-2026:34911
  • 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 5.14.0-687.22.1.el9_8, kernel-rt-core 5.14.0-687.22.1.el9_8, kernel-rt-modules 5.14.0-687.22.1.el9_8, kernel-rt-debug-core 5.14.0-687.22.1.el9_8, kernel-rt-modules-core 5.14.0-687.22.1.el9_8, kernel-rt-debug-modules 5.14.0-687.22.1.el9_8, +4 more
    fixed: vendor fix RHSA-2026:36018
  • Red Hat Enterprise Linux Real Time for NFV (v. 10) kernel-rt 6.12.0-211.30.1.el10_2, kernel-rt-core 6.12.0-211.30.1.el10_2, kernel-rt-modules 6.12.0-211.30.1.el10_2, kernel-rt-debug-core 6.12.0-211.30.1.el10_2, kernel-rt-modules-core 6.12.0-211.30.1.el10_2, kernel-rt-debug-modules 6.12.0-211.30.1.el10_2, +4 more
    fixed: vendor fix RHSA-2026:34911
  • 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 OpenShift Container Platform 4.19 rhcos 4.19.9.6.202607220857
    fixed: vendor fix RHSA-2026:44231
  • Red Hat OpenShift Container Platform 4.20 rhcos 4.20.9.6.202607151937
    fixed: vendor fix RHSA-2026:40787
  • Red Hat OpenShift Container Platform 4.21 rhcos 4.21.9.6.202607151836
    fixed: vendor fix RHSA-2026:40779
  • Red Hat OpenShift Container Platform 4.22 rhcos 4.22.9.8.202607152026
    fixed: vendor fix RHSA-2026:40764
  • 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 Red Hat Enterprise Linux 8 perf, kernel, bpftool, kernel-rt, kernel-core, kernel-tools, +29 more 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 OpenShift Container Platform 4 openshift/ose-rhel-coreos-8
    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
23 d ago

Exploit prediction

0.34% chance of exploitation in the next 30 days, higher than 27% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CNA 3.1 9.3 CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/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 9
  • Red Hat Red Hat Enterprise Linux 9.6 Extended Update Support
  • Red Hat Red Hat OpenShift Container Platform 4.19
  • Red Hat Red Hat OpenShift Container Platform 4.20
  • Red Hat Red Hat OpenShift Container Platform 4.21
  • Red Hat Red Hat OpenShift Container Platform 4.22
  • Red Hat Red Hat Enterprise Linux 6
  • Red Hat Red Hat Enterprise Linux 7
  • Red Hat Red Hat Enterprise Linux 8
  • Red Hat Red Hat Enterprise Linux for NVIDIA 26
  • Red Hat Red Hat OpenShift Container Platform 4

Classification

Weakness
  • CWE-911 Improper Update of Reference Count
  • 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.