Use of Uninitialized Variable in Linux kernel - CVE-2026-92520
Published: September 18, 2026
Vulnerability identifier: #VU151005
CSH Severity: Low
CVSS v4: 4.8 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-92520
CWE-ID: CWE-457
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a local user to disclose uninitialized stack contents.
The vulnerability exists due to use of an uninitialized output buffer in BPF queue and stack pop/peek helpers when a lock acquisition fails. A local user can invoke the affected helpers during a failed lock acquisition to disclose uninitialized stack contents.
Affected software
Linux kernel
How to mitigate CVE-2026-92520
Install security update from vendor's repository.