CVE-2026-93146

Summary

In the Linux kernel, the following vulnerability has been resolved:

time/namespace: Validate nanosecond field in proc_timens_set_offset()

The function validates tv_sec to be within [-KTIME_SEC_MAX, KTIME_SEC_MAX] but never validates that tv_nsec is within the valid range of [0, NSEC_PER_SEC-1] before using it in timespec64_add().

timespec64_add() expects both timespec64 structures to have normalized values with tv_nsec in the range [0, 999999999]. If off->val.tv_nsec contains invalid values (negative or >= NSEC_PER_SEC), it could lead to incorrect calculations or unexpected behavior.

Add validation to ensure tv_nsec is within the valid range before performing the addition.

Affected Software

VendorProductVersion RangeStatus
LinuxLinux04a8682a71becdb639ec9c0d82b315a2baef7a5d < db667d2970c756cc7b483f45f272440f845a665baffected
LinuxLinux04a8682a71becdb639ec9c0d82b315a2baef7a5d < 1f0c3c0c36c7aedf55a60d9c71c4bd258b8937ceaffected
LinuxLinux04a8682a71becdb639ec9c0d82b315a2baef7a5d < 06aba58e58492d2b8eae059274caed29025ea96eaffected
LinuxLinux5.6affected
LinuxLinux0 < 5.6unaffected
LinuxLinux6.18.52 <= 6.18.*unaffected
LinuxLinux7.2.6 <= 7.2.*unaffected
LinuxLinux7.3-rc1 <= *unaffected

Weaknesses

References