Race condition in Linux kernel - CVE-2026-93208
Published: September 25, 2026
Vulnerability identifier: #VU152190
CSH Severity: Low
CVSS v4: 2 [CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-93208
CWE-ID: CWE-362
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a local user to prevent slab caches from being released.
The vulnerability exists due to a race condition in KASAN quarantine cache removal when a CPU goes offline after per-CPU cache processing. A local user can trigger cache shrinking or destruction during CPU hotplug activity to prevent slab caches from being released.
Only kernels built with CONFIG_KASAN_GENERIC are affected.
Affected software
Linux kernel
How to mitigate CVE-2026-93208
Install security update from vendor's repository.
Linux kernel - update to 7.0 rc3
External References
- https://git.kernel.org/stable/c/30e8cb8598aa41b1b9f8803081d2ae5e5369c0f3
- https://git.kernel.org/stable/c/3119d58e4ef8719d669911d38a53fc00086ac48b
- https://git.kernel.org/stable/c/709c3646545e0a1f99a5816384c633f6552c5a98
- https://git.kernel.org/stable/c/7cd164f0e1bab0f8dd125c92ed4f19bbd6b92a4a
- https://git.kernel.org/stable/c/8790303cbaac52a11dfed4aab261f8ea60682525