CVE-2026-80927timekeeping: Check the return value of tk_get_aux_ts64 in __do_adjtimex()
Updated under an hour ago ()
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No exploitation reported and no EPSS estimate yet.
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In the Linux kernel, the following vulnerability has been resolved: timekeeping: Check the return value of tk_get_aux_ts64 in __do_adjtimex() If the auxiliary clock is disabled during tk_get_aux_ts64() but is enabled before tks->clock_valid is checked, then uninitialized stackdata will be used in the calculations and indirectly leaked to userspace. The same race window also exists after this change and also for the core timekeeper. But in these cases the only effect would be incorrect adjustments and this is userspace's responsibility to avoid this.
- CVSS
- Not yet scored
- Weakness (CWE)
- Not given
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- Linux
- NVD analysis
- Received
- Record last updated
- Sep 11, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
Linux Linux linux:linux (from the name) | from 4eca49d0b621b314ac7c80f363932ec6f6c8abc8 before fecf1e37775269ad38c172b468ad4ecc3968aa63; from 4eca49d0b621b314ac7c80f363932ec6f6c8abc8 before bc59dac50cb45a725f7a50760c7cc72a0964f722; 4eca49d0b621b314ac7c80f363932ec6f6c8abc8 builds before 4b61084b11bcecce86d03804ff30f8d7b465593c | CNA record |
References
- https://git.kernel.org/stable/c/fecf1e37775269ad38c172b468ad4ecc3968aa63
- https://git.kernel.org/stable/c/bc59dac50cb45a725f7a50760c7cc72a0964f722
- https://git.kernel.org/stable/c/4b61084b11bcecce86d03804ff30f8d7b465593c
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.