# KEYS: trusted: Fix TPM teardown ordering

CVE record · `CVE-2026-89763`

- **Identifiers:** `CVE-2026-89763`
- **State:** Confirmed
- **Severity:** CVSS 7.8 High
- **Critical:** No
- **CNA:** Linux
- **Technologies:** [Linux kernel](https://agentprime.io/advisories/technology/linux-kernel.md)
- **Published:** 11 Sept 2026
- **Updated:** 30 Oct 2026
- **Reviewed by a person:** No

Published by the CVE Program (CNA: Linux) at 11 Sept 2026, 19:47 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: `0b6cf6b97b7ef1fa3c7fefab0cac897a1c4a3400 to before b254cdadbcb6bdd0daf7391d63b3b97b2bec1ad9` (git)
  - affected: `0b6cf6b97b7ef1fa3c7fefab0cac897a1c4a3400 to before c96518231608bbf9568f539aadb20a8e366b54c7` (git)
  - affected: `0b6cf6b97b7ef1fa3c7fefab0cac897a1c4a3400 to before 6564808189c9a1e682ee7b5e70f5f1c73c89c3a4` (git)
  - affected: `0b6cf6b97b7ef1fa3c7fefab0cac897a1c4a3400 to before 81dfc6c665547a4e41721b6716f894f263a5e03f` (git)
  - affected: `0b6cf6b97b7ef1fa3c7fefab0cac897a1c4a3400 to before 3d67b4acbfc7af331d887a8efc04bef6573b8a7a` (git)
  - affected: `0b6cf6b97b7ef1fa3c7fefab0cac897a1c4a3400 to before 753c978f2400f9783eb524842a975d3ac950d511` (git)
  - affected: `0b6cf6b97b7ef1fa3c7fefab0cac897a1c4a3400 to before 2f7541afbc57fe9d26769a22c31d8ce8790c9a19` (git)
  - affected: `0b6cf6b97b7ef1fa3c7fefab0cac897a1c4a3400 to before 5e2d672280d97d83de43031d93761b12dadd7b8a` (git)
  - Other versions: unaffected
- Vendor: Linux. Product: Linux.
  - affected: `5.1`
  - unaffected: `before 5.1` (semver)
  - unaffected: `5.10.273 to 5.10.*, inclusive` (semver)
  - unaffected: `5.15.224 to 5.15.*, inclusive` (semver)
  - unaffected: `6.1.191 to 6.1.*, inclusive` (semver)
  - unaffected: `6.6.160 to 6.6.*, inclusive` (semver)
  - unaffected: `6.12.111 to 6.12.*, inclusive` (semver)
  - unaffected: `6.18.50 to 6.18.*, inclusive` (semver)
  - unaffected: `7.2.4 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.

> The Linux kernel trusted keys code is affected by a use-after-free caused by the wrong teardown order in trusted_tpm_exit(). A race between adding a trusted key and removing the module can let the kernel read freed memory, and the source does not state what privileges an attacker needs. Upgrade to Linux 5.10.273, 5.15.224, 6.1.191, 6.6.160, or a later release in those branches.

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

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

- **CISA KEV:** Not listed.
- **EPSS:** 0.0012, the 1st 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 11 Sept 2026. New records show when each source confirmed them.

## Sources

- [CVE List: CVE-2026-89763](https://www.cve.org/CVERecord?id=CVE-2026-89763)
- [NVD: CVE-2026-89763](https://nvd.nist.gov/vuln/detail/CVE-2026-89763)

### References from the CNA

- <https://git.kernel.org/stable/c/b254cdadbcb6bdd0daf7391d63b3b97b2bec1ad9>
- <https://git.kernel.org/stable/c/c96518231608bbf9568f539aadb20a8e366b54c7>
- <https://git.kernel.org/stable/c/6564808189c9a1e682ee7b5e70f5f1c73c89c3a4>
- <https://git.kernel.org/stable/c/81dfc6c665547a4e41721b6716f894f263a5e03f>
- <https://git.kernel.org/stable/c/3d67b4acbfc7af331d887a8efc04bef6573b8a7a>
- <https://git.kernel.org/stable/c/753c978f2400f9783eb524842a975d3ac950d511>
- <https://git.kernel.org/stable/c/2f7541afbc57fe9d26769a22c31d8ce8790c9a19>
- <https://git.kernel.org/stable/c/5e2d672280d97d83de43031d93761b12dadd7b8a>

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-2026-89763>
- Everything that needs attention now: <https://agentprime.io/advisories/critical.md>

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The web page: <https://agentprime.io/advisories/CVE-2026-89763/>. Everything for agents: <https://agentprime.io/llms.txt>.