# f2fs: use the mount idmap for the owner check in f2fs_xattr_advise_set()

CVE record · `CVE-2026-89839`

- **Identifiers:** `CVE-2026-89839`
- **State:** Confirmed
- **Severity:** No CVSS score
- **Critical:** No
- **CNA:** Linux
- **Technologies:** [Linux kernel](https://agentprime.io/advisories/technology/linux-kernel.md)
- **Published:** 16 Sept 2026
- **Updated:** 19 Oct 2026
- **Reviewed by a person:** No

Published by the CVE Program (CNA: Linux) at 16 Sept 2026, 10:31 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: `01beba7957a26f9b7179127e8ad56bb5a0f56138 to before 4c0c610b480cfbc57528aa1acbd6be12ed2a6fb1` (git)
  - affected: `01beba7957a26f9b7179127e8ad56bb5a0f56138 to before c3e2692c7a58e0bdb84bd658d827e89dcecea3ad` (git)
  - affected: `01beba7957a26f9b7179127e8ad56bb5a0f56138 to before 3b681229e9f8fb1dd29bc65983bf3c87779e4ca3` (git)
  - affected: `01beba7957a26f9b7179127e8ad56bb5a0f56138 to before ab31e3b774f5d06b4489cef6c297b48c47c9dcbd` (git)
  - affected: `01beba7957a26f9b7179127e8ad56bb5a0f56138 to before a54ffce4637acb0db8e695188a6c7f99f14c3576` (git)
  - Other versions: unaffected
- Vendor: Linux. Product: Linux.
  - affected: `6.3`
  - unaffected: `before 6.3` (semver)
  - unaffected: `6.6.157 to 6.6.*, inclusive` (semver)
  - unaffected: `6.12.110 to 6.12.*, inclusive` (semver)
  - unaffected: `6.18.51 to 6.18.*, inclusive` (semver)
  - unaffected: `7.2.5 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 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 16 Sept 2026. New records show when each source confirmed them.

## Sources

- [CVE List: CVE-2026-89839](https://www.cve.org/CVERecord?id=CVE-2026-89839)
- [NVD: CVE-2026-89839](https://nvd.nist.gov/vuln/detail/CVE-2026-89839)

### References from the CNA

- <https://git.kernel.org/stable/c/4c0c610b480cfbc57528aa1acbd6be12ed2a6fb1>
- <https://git.kernel.org/stable/c/c3e2692c7a58e0bdb84bd658d827e89dcecea3ad>
- <https://git.kernel.org/stable/c/3b681229e9f8fb1dd29bc65983bf3c87779e4ca3>
- <https://git.kernel.org/stable/c/ab31e3b774f5d06b4489cef6c297b48c47c9dcbd>
- <https://git.kernel.org/stable/c/a54ffce4637acb0db8e695188a6c7f99f14c3576>

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-2026-89839>
- Everything that needs attention now: <https://agentprime.io/advisories/critical.md>

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The web page: <https://agentprime.io/advisories/CVE-2026-89839/>. Everything for agents: <https://agentprime.io/llms.txt>.