# ext4: fix ABBA deadlock in ext4_xattr_inode_cache_find()

CVE record · `CVE-2026-92503`

- **Identifiers:** `CVE-2026-92503`
- **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, 16:10 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: `0752e7fb549d90c33b4d4186f11cfd25a556d1dd to before e5e883ffe5230320060ea613a1acf750f3161c95` (git)
  - affected: `737fb7853acd5bc8984f6f42e4bfba3334be8ae1 to before 29a2a166450a3e89f61a486033b10cf170fde8b0` (git)
  - affected: `0a46ef234756dca04623b7591e8ebb3440622f0b to before d3b19b318e0e0483180d15f1d9f5e807a1fb59d5` (git)
  - affected: `0a46ef234756dca04623b7591e8ebb3440622f0b to before 074d0620401974cbfa9b63684cdfae99c7b2059c` (git)
  - affected: `0a46ef234756dca04623b7591e8ebb3440622f0b to before 7720fddd1fe344d14be258a2028f74ebf1569511` (git)
  - affected: `0a46ef234756dca04623b7591e8ebb3440622f0b to before 03438084a7b8621fb5c762dd3d04cff5f2630fb2` (git)
  - affected: `111103907234bffd0a34fba070ad9367de058752` (git)
  - affected: `6.1.107 to before 6.1.191` (semver)
  - affected: `6.6.47 to before 6.6.160` (semver)
  - affected: `6.9.7 to before 6.10` (semver)
  - Other versions: unaffected
- Vendor: Linux. Product: Linux.
  - affected: `6.10`
  - unaffected: `before 6.10` (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

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

- **CISA KEV:** Not listed.
- **EPSS:** 0.0022, the 12th 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-2026-92503](https://www.cve.org/CVERecord?id=CVE-2026-92503)
- [NVD: CVE-2026-92503](https://nvd.nist.gov/vuln/detail/CVE-2026-92503)

### References from the CNA

- <https://git.kernel.org/stable/c/e5e883ffe5230320060ea613a1acf750f3161c95>
- <https://git.kernel.org/stable/c/29a2a166450a3e89f61a486033b10cf170fde8b0>
- <https://git.kernel.org/stable/c/d3b19b318e0e0483180d15f1d9f5e807a1fb59d5>
- <https://git.kernel.org/stable/c/074d0620401974cbfa9b63684cdfae99c7b2059c>
- <https://git.kernel.org/stable/c/7720fddd1fe344d14be258a2028f74ebf1569511>
- <https://git.kernel.org/stable/c/03438084a7b8621fb5c762dd3d04cff5f2630fb2>

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-2026-92503>
- Everything that needs attention now: <https://agentprime.io/advisories/critical.md>

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The web page: <https://agentprime.io/advisories/CVE-2026-92503/>. Everything for agents: <https://agentprime.io/llms.txt>.