CVE-2026-46021
kernel: thermal: core: Fix thermal zone governor cleanup issues
Severity
ModerateRed Hat Product Security
CVSS 3.1
Review impact separately from score.
Published · May 27, 2026
Updated · June 28, 2026
Description
A flaw was found in the Linux kernel's thermal management subsystem. This vulnerability can lead to a memory leak if a thermal governor is not correctly cleaned up during device registration failures. More critically, a race condition during thermal zone unregistration, where a governor update might conflict with the unregistration process, can result in a use-after-free error. A local attacker could potentially exploit this use-after-free to cause system instability, leading to a denial of service, or in some scenarios, achieve unauthorized code execution.
CVSS score applicability
The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.
Mitigation
No mitigation is specified in collected source.
CVSS / CWE
CVSS 3.1 · 7CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
CWE-825 · Expired Pointer Dereference