🛡️ CVE-2026-46093 — kernel

🟠 CVSS 7.8 — High ✅ No Known Exploit NVD
7.8
CVSS Score
0 Low4 Medium7 High9 Critical10

Description

mm/vmalloc: take vmap_purge_lock in shrinker

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

mm/vmalloc: take vmap_purge_lock in shrinker

decay_va_pool_node() can be invoked concurrently from two paths:

__purge_vmap_area_lazy() when pools are being purged, and the shrinker via

vmap_node_shrink_scan().

However, decay_va_pool_node() is not safe to run concurrently, and the

shrinker path currently lacks serialization, leading to races and possible

leaks.

Protect decay_va_pool_node() by taking vmap_purge_lock in the shrinker

path to ensure serialization with purge users.

How this vulnerability can be exploited

This issue can be reached with local access to the system, attack complexity is low, an attacker needs low-level privileges on the target. No user interaction is required. The scope is unchanged, so the impact stays within the vulnerable component. Rated impact: confidentiality high, integrity high, availability high.

Affected software

CVE-2026-46093 is recorded against 3 packages.

  • kernel (from 6.19.0 up to 7.0.4)
  • linux-kernel (from 6.19 up to 7.0.4)
  • unknown

Timeline and source

Published on 27 May 2026 and last revised on 6 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)
github.com (Advisory)
nvd.nist.gov (Advisory)
git.kernel.org (Package)

CVE-2026-46093 on other distributions

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

Details

Severity High
CVSS Score 7.8
CVSS Vector CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CWE N/A
Public Exploit ✅ No
Source NVD
Published 2026-05-27
Updated 2026-08-12
Modified 2026-08-06

Affected Packages

Software From version Fixed in
kernel 6.19.0 7.0.4
linux-kernel 6.19 7.0.4
unknown — —

Similar Threats

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