Riskcovery

CVE-2026-80927

timekeeping: Check the return value of tk_get_aux_ts64 in __do_adjtimex()

State
Published
Severity
Not scored
Published
Sep 11, 2026
Updated
Oct 19, 2026
Reserved
Aug 26, 2026

Read the record on cve.org

Description

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.

Scores

The record has no CVSS score.

Weaknesses

The record names no weakness.

Affected Products

ProductVersions
LinuxLinux
  • 4eca49d0b621b314ac7c80f363932ec6f6c8abc8 to before fecf1e37775269ad38c172b468ad4ecc3968aa63Affected
  • 4eca49d0b621b314ac7c80f363932ec6f6c8abc8 to before bc59dac50cb45a725f7a50760c7cc72a0964f722Affected
  • 4eca49d0b621b314ac7c80f363932ec6f6c8abc8 to before 4b61084b11bcecce86d03804ff30f8d7b465593cAffected
LinuxLinux
  • 6.17Affected
  • before 6.17Not affected
  • 6.18.50 through 6.18.*Not affected
  • 7.2.4 through 7.2.*Not affected
  • 7.3 and laterNot affected

References

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