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🛡️ CVE-2026-46316 — kernel

🔴 CVSS 9.3 — Critical ✅ No Known Exploit NVD
9.3
CVSS Score
0 Low4 Medium7 High9 Critical10

Description

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

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.

How this vulnerability can be exploited

This issue can be reached with local access to the system, attack complexity is low, an attacker needs no privileges on the target. No user interaction is required. The scope is changed, meaning a successful attack can affect components beyond the vulnerable one. Rated impact: confidentiality high, integrity high, availability high.

CVSS metrics in full

The score comes from this vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H

  • Attack vector: Local — a local account, shell or session on the host is needed.
  • Attack complexity: Low — the attack works reliably, with no preparation.
  • Privileges required: None — an unauthenticated stranger can try it.
  • User interaction: None — nobody has to be tricked into anything.
  • Scope: Changed — a successful attack reaches components beyond the vulnerable one.
  • Confidentiality impact: High — total loss, or loss the attacker controls.
  • Integrity impact: High — total loss, or loss the attacker controls.
  • Availability impact: High — total loss, or loss the attacker controls.

Affected software

CVE-2026-46316 is recorded against 2 packages.

  • kernel (from 6.19.0 up to 7.0.12)
  • linux-kernel

Timeline and source

Published on 9 June 2026 and last revised on 12 August 2026. No public exploit is currently recorded for this entry. A vendor advisory or fix has been published. Record sourced from NVD.

References

git.kernel.org (Web)
git.kernel.org (Web)
git.kernel.org (Web)
git.kernel.org (Web)
security.access.redhat.com (Web)
access.redhat.com (Advisory)
access.redhat.com (Advisory)
access.redhat.com (Advisory)
access.redhat.com (Advisory)
access.redhat.com (Advisory)
access.redhat.com (Advisory)
access.redhat.com (Advisory)
access.redhat.com (Advisory)
access.redhat.com (Advisory)
github.com (Advisory)
nvd.nist.gov (Advisory)
bugzilla.redhat.com (Report)
git.kernel.org (Package)

Other advisories for this package

kernel has other advisories on record. If you are patching this one, these are worth checking on the same host:

CVE-2026-46316 on other distributions

Each distribution ships its own build and its own fixed version. Pick the one you run:

Details

Severity Critical
CVSS Score 9.3
CVSS Vector CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
CWE N/A
Public Exploit ✅ No
Source NVD
Published 2026-06-09
Updated 2026-08-20
Modified 2026-08-12

Affected Packages

Software From version Fixed in
kernel 6.19.0 7.0.12
linux-kernel — —

References

Similar Threats

Exploit Protection

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ⓘ Data Notice: The information presented above has been compiled from publicly available internet sources. Boteraser aggregates this data solely for informational purposes and does not independently classify, evaluate, or endorse any findings about the vulnerabilities listed. The accuracy and completeness of this information is the sole responsibility of the original publishers. Boteraser and its operators accept no liability for any decisions made based on this data.

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