# xfs: don't livelock in scrub on a circular unlinked list

CVE record · `CVE-2026-80820`

- **Identifiers:** `CVE-2026-80820`
- **State:** Confirmed
- **Severity:** No CVSS score
- **Critical:** No
- **CNA:** Linux
- **Technologies:** [Linux kernel](https://agentprime.io/advisories/technology/linux-kernel.md)
- **Published:** 4 Sept 2026
- **Updated:** 4 Sept 2026
- **Reviewed by a person:** No

Published by the CVE Program (CNA: Linux) at 4 Sept 2026, 15:13 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: `a12890aebb895951720ff884eab1c99a30645b29 to before 599453f83458b57995290a1d31200c263e2c2691` (git)
  - affected: `a12890aebb895951720ff884eab1c99a30645b29 to before 159d162fe80bd56573cafde5801bd5a90a3dd1ac` (git)
  - affected: `a12890aebb895951720ff884eab1c99a30645b29 to before 56407a61a8bb85b884de802d39635abdb0ea7408` (git)
  - affected: `a12890aebb895951720ff884eab1c99a30645b29 to before 527eaaefddb6ec5c83a06c9a1559960dd6361753` (git)
  - Other versions: unaffected
- Vendor: Linux. Product: Linux.
  - affected: `4.15`
  - unaffected: `before 4.15` (semver)
  - unaffected: `6.12.106 to 6.12.*, inclusive` (semver)
  - unaffected: `6.18.47 to 6.18.*, inclusive` (semver)
  - unaffected: `7.1.11 to 7.1.*, inclusive` (semver)
  - unaffected: `7.2 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:** 0.0017, the 6th 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 4 Sept 2026. New records show when each source confirmed them.

## Sources

- [CVE List: CVE-2026-80820](https://www.cve.org/CVERecord?id=CVE-2026-80820)
- [NVD: CVE-2026-80820](https://nvd.nist.gov/vuln/detail/CVE-2026-80820)

### References from the CNA

- <https://git.kernel.org/stable/c/599453f83458b57995290a1d31200c263e2c2691>
- <https://git.kernel.org/stable/c/159d162fe80bd56573cafde5801bd5a90a3dd1ac>
- <https://git.kernel.org/stable/c/56407a61a8bb85b884de802d39635abdb0ea7408>
- <https://git.kernel.org/stable/c/527eaaefddb6ec5c83a06c9a1559960dd6361753>

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-2026-80820>
- Everything that needs attention now: <https://agentprime.io/advisories/critical.md>

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The web page: <https://agentprime.io/advisories/CVE-2026-80820/>. Everything for agents: <https://agentprime.io/llms.txt>.