time/namespace: Validate nanosecond field in proc_timens_set_offset() (CVE-2026-93146) | HOL Guard CVE

Unknown severity · Source severity not reportedCVE-2026-93146

time/namespace: Validate nanosecond field in proc_timens_set_offset()

Answer in brief

CVE-2026-93146 records a Unknown severity vulnerability in time/namespace: Validate nanosecond field in proc_timens_set_offset(). The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Sep 17, 2026Updated Sep 17, 2026Source checked Sep 17, 2026First seen by HOL Sep 17, 2026Material review Sep 17, 2026

Upstream Advisory

Key facts

Risk: Unknown severitySource severity not reported
Exploitation: Not marked as known exploited
Affected software: 2 mapped packages or products
Fix availability: Available

Why this deserves its current priority

A CVSS score is not reported in the current record. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
Package	Affected range	Fixed version
Linux/Linuxgeneric	>=04a8682a71becdb639ec9c0d82b315a2baef7a5d <db667d2970c756cc7b483f45f272440f845a665b \|\| >=04a8682a71becdb639ec9c0d82b315a2baef7a5d <1f0c3c0c36c7aedf55a60d9c71c4bd258b8937ce \|\| >=04a8682a71becdb639ec9c0d82b315a2baef7a5d <06aba58e58492d2b8eae059274caed29025ea96e	db667d2970c756cc7b483f45f272440f845a665b, 1f0c3c0c36c7aedf55a60d9c71c4bd258b8937ce, 06aba58e58492d2b8eae059274caed29025ea96e
Linux/Linuxgeneric	5.6	Not reported

Recommended response

Check inventory. Check lockfiles and deployed manifests for Linux/Linux, Linux/Linux.
Review the reported fix. Update Linux/Linux to db667d2970c756cc7b483f45f272440f845a665b if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

Published upstream
Sep 17, 2026
Evidence: source:cvelist:source_dates:source-dates:record
Source modified
Sep 17, 2026
Evidence: source:cvelist:source_dates:source-dates:record
First seen by HOL
Sep 17, 2026

Sources and claim methodology

Upstream source 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.

Quoted source text, attributed separately from HOL analysis.