CVE-2026-93146

/// Technical description

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.

/// Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

/// References