Improper locking in Linux kernel - CVE-2026-90043
Published: September 16, 2026
Vulnerability identifier: #VU150245
CSH Severity: Low
CVSS v4: 8.5 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-90043
CWE-ID: CWE-667
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a local user to compromise confidentiality, integrity, and availability.
The vulnerability exists due to improper locking in the zram slot-locking mechanism when access-time values are stored for zram slots. A local user can trigger concurrent access to the same zram slot to compromise confidentiality, integrity, and availability.
The issue affects 64-bit big-endian systems when zram access-time tracking is enabled.
Affected software
Linux kernel
How to mitigate CVE-2026-90043
Install security update from vendor's repository.
Linux kernel - update to 7.0 rc3