---
id: CVE-2026-93146
title: |-
  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 th…
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 th…
severity: none
vendor: Linux
product: Linux
affected:
  - >-
    Linux >= 04a8682a71becdb639ec9c0d82b315a2baef7a5d <
    db667d2970c756cc7b483f45f272440f845a665b
  - >-
    Linux >= 04a8682a71becdb639ec9c0d82b315a2baef7a5d <
    1f0c3c0c36c7aedf55a60d9c71c4bd258b8937ce
  - >-
    Linux >= 04a8682a71becdb639ec9c0d82b315a2baef7a5d <
    06aba58e58492d2b8eae059274caed29025ea96e
  - Linux 5.6
published: '2026-09-17'
updated: '2026-09-17'
sourceUpdated: '2026-09-17T17:18:09.757'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-93146'
references:
  - url: 'https://git.kernel.org/stable/c/06aba58e58492d2b8eae059274caed29025ea96e'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/1f0c3c0c36c7aedf55a60d9c71c4bd258b8937ce'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/db667d2970c756cc7b483f45f272440f845a665b'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
tags:
  - nvd
  - cve.org
ingestedAt: '2026-09-17T16:21:47.742Z'
epss: 0.00206
epssPercentile: 0.0943
---

## Overview

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

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.