CVE-2026-58084 (GCVE-0-2026-58084)
Vulnerability from cvelistv5 – Published: 2026-08-19 07:31 – Updated: 2026-08-26 19:46
VLAI
EPSS
VEX
Title
Kernel stack disclosure via timer_settime(2)
Summary
To retrieve the previous timer value, the kernel calls realtimer_gettime(), which obtains the current time for the timer's clock. For a timer using CLOCK_TAI this can fail when no TAI offset has been configured, but the error return was not checked, so the uninitialized output buffer was copied to userspace.
An unprivileged local user can obtain uninitialized kernel stack memory by creating a POSIX timer with CLOCK_TAI and calling timer_settime(2), potentially disclosing sensitive kernel data.
Severity
5.5 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-26 19:45 UTC
CWE
- CWE-908 - Use of Uninitialized Resource
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://security.freebsd.org/advisories/FreeBSD-S… | vendor-advisory |
Impacted products
Date Public
2026-07-29 22:40
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