# time/namespace: Validate nanosecond field in proc_timens_set_offset()

CVE record · `CVE-2026-93146`

- **Identifiers:** `CVE-2026-93146`
- **State:** Confirmed
- **Severity:** No CVSS score
- **Critical:** No
- **CNA:** Linux
- **Technologies:** [Linux kernel](https://agentprime.io/advisories/technology/linux-kernel.md)
- **Published:** 17 Sept 2026
- **Updated:** 30 Oct 2026
- **Reviewed by a person:** No

Published by the CVE Program (CNA: Linux) at 17 Sept 2026, 16:11 UTC. agentprime has not analysed this yet, so whether it affects any app is not known. This CVE names a vendor and product rather than a package, so the lockfile check doesn’t match it.

## Affected products, as the CNA wrote them

- Vendor: Linux. Product: Linux.
  - affected: `04a8682a71becdb639ec9c0d82b315a2baef7a5d to before ce0dd307dfa3193fbf06371b7c819a6bff7d3d68` (git)
  - affected: `04a8682a71becdb639ec9c0d82b315a2baef7a5d to before 5b8a40de738b7c4896c2edbc6262bd1b3462ded0` (git)
  - affected: `04a8682a71becdb639ec9c0d82b315a2baef7a5d to before b20d7085ab314672447322c10cc5d1ba443e3b8e` (git)
  - affected: `04a8682a71becdb639ec9c0d82b315a2baef7a5d to before db667d2970c756cc7b483f45f272440f845a665b` (git)
  - affected: `04a8682a71becdb639ec9c0d82b315a2baef7a5d to before 1f0c3c0c36c7aedf55a60d9c71c4bd258b8937ce` (git)
  - affected: `04a8682a71becdb639ec9c0d82b315a2baef7a5d to before 06aba58e58492d2b8eae059274caed29025ea96e` (git)
  - Other versions: unaffected
- Vendor: Linux. Product: Linux.
  - affected: `5.6`
  - unaffected: `before 5.6` (semver)
  - unaffected: `6.1.191 to 6.1.*, inclusive` (semver)
  - unaffected: `6.6.160 to 6.6.*, inclusive` (semver)
  - unaffected: `6.12.114 to 6.12.*, inclusive` (semver)
  - unaffected: `6.18.52 to 6.18.*, inclusive` (semver)
  - unaffected: `7.2.6 to 7.2.*, inclusive` (semver)
  - unaffected: `7.3 to *, inclusive` (original_commit_for_fix)
  - Other versions: affected

## Machine-written summary

Summary written by Claude Haiku from the source advisory. Not reviewed by a person.

> Linux kernel time namespace offset handling in proc_timens_set_offset() did not check that the nanosecond field of a user-supplied offset is in the valid range before using it in a time addition, so out-of-range values could produce incorrect calculations. The affected range begins at commit 04a8682a71becdb639ec9c0d82b315a2baef7a5d and extends to kernel 5.6 and its stable branches, with several fixed versions listed for 6.1, 6.6, 6.12 and 6.18. The source gives few details about the attack conditions or impact. Upgrade to a fixed kernel version for your branch.

Written 12 Nov 2026.

## Not analysed yet

We haven’t published our own analysis of this CVE. If a person reviews it, this page will say what’s affected and what has to be true for it to matter.

## Severity and exploitation

No source has published a CVSS score for this record yet.

- **CISA KEV:** Not listed.
- **EPSS:** 0.0022, the 11th percentile, on 14 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

## Timeline

This record came from the full history of the CVE Program, published 17 Sept 2026. New records show when each source confirmed them.

## Sources

- [CVE List: CVE-2026-93146](https://www.cve.org/CVERecord?id=CVE-2026-93146)
- [NVD: CVE-2026-93146](https://nvd.nist.gov/vuln/detail/CVE-2026-93146)

### References from the CNA

- <https://git.kernel.org/stable/c/ce0dd307dfa3193fbf06371b7c819a6bff7d3d68>
- <https://git.kernel.org/stable/c/5b8a40de738b7c4896c2edbc6262bd1b3462ded0>
- <https://git.kernel.org/stable/c/b20d7085ab314672447322c10cc5d1ba443e3b8e>
- <https://git.kernel.org/stable/c/db667d2970c756cc7b483f45f272440f845a665b>
- <https://git.kernel.org/stable/c/1f0c3c0c36c7aedf55a60d9c71c4bd258b8937ce>
- <https://git.kernel.org/stable/c/06aba58e58492d2b8eae059274caed29025ea96e>

Facts on this page come from the CVE List as the CNA published them, with CVSS from the sources named above, CISA KEV and FIRST EPSS. Vendors, products and versions are shown as the CNA wrote them. We don’t reproduce the CVE’s description.

## Check whether this affects you

This CVE names a vendor and product rather than a package, so the lockfile check doesn’t match it. Compare the affected versions above with what you run.

- With the agentprime MCP server (<https://api.agentprime.io/mcp>), `get_advisory` returns this record and `search_advisories` finds related ones. Setup: <https://agentprime.io/mcp.md>
- As JSON: <https://api.agentprime.io/v1/advisories/CVE-2026-93146>
- Everything that needs attention now: <https://agentprime.io/advisories/critical.md>

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The web page: <https://agentprime.io/advisories/CVE-2026-93146/>. Everything for agents: <https://agentprime.io/llms.txt>.