SB2026091331 - Use of Uninitialized Variable in Linux kernel time
Published: September 13, 2026
Security Bulletin ID
SB2026091331
CSH Severity
Low
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Local access
Highest impact
Information disclosure
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 vulnerability.
1) Use of Uninitialized Variable (CVE-ID: CVE-2026-80927)
CWE-ID: CWE-457 - Use of Uninitialized Variable
CVSSv4: 2 [CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N]
The vulnerability allows a local user to disclose uninitialized stack data to userspace.
The vulnerability exists due to use of an uninitialized variable in __do_adjtimex() when the auxiliary clock is disabled during tk_get_aux_ts64() and enabled before clock validity is checked. A local user can invoke adjtimex during this race to disclose uninitialized stack data to userspace.
Remediation
Install update from vendor's website.