# locking/lockdep: Fix NULL pointer dereference in \_\_lock_set_class()

CVE record · `CVE-2026-93261`

- **Identifiers:** `CVE-2026-93261`
- **State:** Confirmed
- **Severity:** No CVSS score
- **Critical:** No
- **CNA:** Linux
- **Technologies:** [Linux kernel](https://agentprime.io/advisories/technology/linux-kernel.md)
- **Published:** 24 Sept 2026
- **Updated:** 19 Oct 2026
- **Reviewed by a person:** No

Published by the CVE Program (CNA: Linux) at 24 Sept 2026, 15:51 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: `64aa348edc617dea17bbd01ddee4e47886d5ec8c to before f6093ff67ea6e347574819ed23e96e0f82a25ffc` (git)
  - affected: `64aa348edc617dea17bbd01ddee4e47886d5ec8c to before 59a5c7dd331a3dab48100e1ef8e9bb4f9132a2b2` (git)
  - affected: `64aa348edc617dea17bbd01ddee4e47886d5ec8c to before f56e54fd24f05e9de528fcb77f6084f80c8066ce` (git)
  - affected: `64aa348edc617dea17bbd01ddee4e47886d5ec8c to before 5c3bff6cf26e6a54fbf8b893a879c32824d2d50d` (git)
  - affected: `64aa348edc617dea17bbd01ddee4e47886d5ec8c to before b2113dcd8238bf00ce37a34e67b29cf31d32a545` (git)
  - affected: `64aa348edc617dea17bbd01ddee4e47886d5ec8c to before e7c69c6695d84220847cca62a45e879e71e79e9d` (git)
  - affected: `64aa348edc617dea17bbd01ddee4e47886d5ec8c to before 9be10f49dfc2e4b472b3a5f346483b67374774b8` (git)
  - affected: `64aa348edc617dea17bbd01ddee4e47886d5ec8c to before 7577e00b9ab506202b9f1a33de3cc8cc6413a4db` (git)
  - Other versions: unaffected
- Vendor: Linux. Product: Linux.
  - affected: `2.6.27`
  - unaffected: `before 2.6.27` (semver)
  - unaffected: `5.10.270 to 5.10.*, inclusive` (semver)
  - unaffected: `5.15.221 to 5.15.*, inclusive` (semver)
  - unaffected: `6.1.188 to 6.1.*, inclusive` (semver)
  - unaffected: `6.6.157 to 6.6.*, inclusive` (semver)
  - unaffected: `6.12.110 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

## 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:** 0.0020, the 9th percentile, on 13 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 24 Sept 2026. New records show when each source confirmed them.

## Sources

- [CVE List: CVE-2026-93261](https://www.cve.org/CVERecord?id=CVE-2026-93261)
- [NVD: CVE-2026-93261](https://nvd.nist.gov/vuln/detail/CVE-2026-93261)

### References from the CNA

- <https://git.kernel.org/stable/c/f6093ff67ea6e347574819ed23e96e0f82a25ffc>
- <https://git.kernel.org/stable/c/59a5c7dd331a3dab48100e1ef8e9bb4f9132a2b2>
- <https://git.kernel.org/stable/c/f56e54fd24f05e9de528fcb77f6084f80c8066ce>
- <https://git.kernel.org/stable/c/5c3bff6cf26e6a54fbf8b893a879c32824d2d50d>
- <https://git.kernel.org/stable/c/b2113dcd8238bf00ce37a34e67b29cf31d32a545>
- <https://git.kernel.org/stable/c/e7c69c6695d84220847cca62a45e879e71e79e9d>
- <https://git.kernel.org/stable/c/9be10f49dfc2e4b472b3a5f346483b67374774b8>
- <https://git.kernel.org/stable/c/7577e00b9ab506202b9f1a33de3cc8cc6413a4db>

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-2026-93261>
- Everything that needs attention now: <https://agentprime.io/advisories/critical.md>

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The web page: <https://agentprime.io/advisories/CVE-2026-93261/>. Everything for agents: <https://agentprime.io/llms.txt>.