🛡️ CVE-2026-46021 — kernel

🟡 CVSS 5.5 — Medium ✅ No Known Exploit NVD
5.5
CVSS Score
0 Low4 Medium7 High9 Critical10

Description

thermal: core: Fix thermal zone governor cleanup issues

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

thermal: core: Fix thermal zone governor cleanup issues

If thermal_zone_device_register_with_trips() fails after adding

a thermal governor to the thermal zone being registered, the

governor is not removed from it as appropriate which may lead to

a memory leak.

In turn, thermal_zone_device_unregister() calls thermal_set_governor()

without acquiring the thermal zone lock beforehand which may race with

a governor update via sysfs and may lead to a use-after-free in that

case.

Address these issues by adding two thermal_set_governor() calls, one to

thermal_release() to remove the governor from the given thermal zone,

and one to the thermal zone registration error path to cover failures

preceding the thermal zone device registration.

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 none, integrity none, availability high.

Affected software

CVE-2026-46021 is recorded against 2 packages.

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

Timeline and source

Published on 27 May 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)
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-2026-46021 on other distributions

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

Details

Severity Medium
CVSS Score 5.5
CVSS Vector CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
CWE N/A
Public Exploit ✅ No
Source NVD
Published 2026-05-27
Updated 2026-08-20
Modified 2026-08-12

Affected Packages

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

References

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