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.
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.
Metrics
Affected Vendors & Products
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Advisories
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Fixes
Solution
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Workaround
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References
History
Wed, 19 Aug 2026 07:45:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| Description | 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. | |
| Title | Kernel stack disclosure via timer_settime(2) | |
| Weaknesses | CWE-908 | |
| References |
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Projects
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MITRE
Status: PUBLISHED
Assigner: freebsd
Published:
Updated: 2026-08-19T07:31:42.001Z
Reserved: 2026-06-29T01:40:17.498Z
Link: CVE-2026-58084
Vulnrichment
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NVD
Status : Received
Published: 2026-08-19T08:17:12.570
Modified: 2026-08-19T08:17:12.570
Link: CVE-2026-58084
Redhat
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OpenCVE Enrichment
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Weaknesses