# ksmbd: defer publishing granted locks to prevent UAF/double-free race

CVE record · `CVE-2026-90162`

- **Identifiers:** `CVE-2026-90162`
- **State:** Confirmed
- **Severity:** CVSS 8.8 High
- **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, 16:06 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: `e2f34481b24db2fd634b5edb0a5bd0e4d38cc6e9 to before f1371a140722c1d6868f9acf69d601de7d4142bf` (git)
  - affected: `e2f34481b24db2fd634b5edb0a5bd0e4d38cc6e9 to before b68d4bb6b03a667c305626bd2c242fd162bac17e` (git)
  - affected: `e2f34481b24db2fd634b5edb0a5bd0e4d38cc6e9 to before 65f54ed0289e9a57e6c60b14347ccea4c318f1fc` (git)
  - affected: `e2f34481b24db2fd634b5edb0a5bd0e4d38cc6e9 to before ff6870cf3b7eccc69d03cbb6f23e3995d96e9a8d` (git)
  - affected: `e2f34481b24db2fd634b5edb0a5bd0e4d38cc6e9 to before a1d26dfb32919088e3638dca01068df3c4507433` (git)
  - affected: `e2f34481b24db2fd634b5edb0a5bd0e4d38cc6e9 to before 29f74f0f2e6df3b393b7b66e810136d0c64e3c59` (git)
  - Other versions: unaffected
- Vendor: Linux. Product: Linux.
  - affected: `5.15`
  - unaffected: `before 5.15` (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: `6.18.57 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

- 8.8 High, CVSS 3.1: `CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H`, from CNA (Linux)

- **CISA KEV:** Not listed.
- **EPSS:** 0.0070, the 53rd 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 17 Sept 2026. New records show when each source confirmed them.

## Sources

- [CVE List: CVE-2026-90162](https://www.cve.org/CVERecord?id=CVE-2026-90162)
- [NVD: CVE-2026-90162](https://nvd.nist.gov/vuln/detail/CVE-2026-90162)

### References from the CNA

- <https://git.kernel.org/stable/c/f1371a140722c1d6868f9acf69d601de7d4142bf>
- <https://git.kernel.org/stable/c/b68d4bb6b03a667c305626bd2c242fd162bac17e>
- <https://git.kernel.org/stable/c/65f54ed0289e9a57e6c60b14347ccea4c318f1fc>
- <https://git.kernel.org/stable/c/ff6870cf3b7eccc69d03cbb6f23e3995d96e9a8d>
- <https://git.kernel.org/stable/c/a1d26dfb32919088e3638dca01068df3c4507433>
- <https://git.kernel.org/stable/c/29f74f0f2e6df3b393b7b66e810136d0c64e3c59>

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-2026-90162>
- Everything that needs attention now: <https://agentprime.io/advisories/critical.md>

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The web page: <https://agentprime.io/advisories/CVE-2026-90162/>. Everything for agents: <https://agentprime.io/llms.txt>.