# udf: reject VAT indexes equal to the entry count

CVE record · `CVE-2026-89525`

- **Identifiers:** `CVE-2026-89525`
- **State:** Confirmed
- **Severity:** No CVSS score
- **Critical:** No
- **CNA:** Linux
- **Technologies:** [Linux kernel](https://agentprime.io/advisories/technology/linux-kernel.md)
- **Published:** 11 Sept 2026
- **Updated:** 19 Oct 2026
- **Reviewed by a person:** No

Published by the CVE Program (CNA: Linux) at 11 Sept 2026, 19:44 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: `1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to before f64e01a90326bb85a3cc8aa0199931dc2f15b589` (git)
  - affected: `1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to before 8a8c1c42a34349a0626d910abbad5a29136446b7` (git)
  - affected: `1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to before 19f36c6453cd88fe6d60ef36ab1f1cad8ddf4ce4` (git)
  - affected: `1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to before b77b83f5529a26d084d64ece98abd6f0cc86e053` (git)
  - affected: `1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to before 9193368408d792cec2057628d87862140fb1ce1c` (git)
  - affected: `1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to before b95c33a4e743874f1b0a45bf2aaa4da553552bd1` (git)
  - affected: `1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to before 1bd7947f1463c21edafa256d0fbec5b99215e2b6` (git)
  - affected: `1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to before cac0cb07f29ccfb373fd4a36c81e908ef3ce608c` (git)
  - Other versions: unaffected
- Vendor: Linux. Product: Linux.
  - affected: `2.6.12`
  - unaffected: `before 2.6.12` (semver)
  - unaffected: `5.10.270 to 5.10.*, inclusive` (semver)
  - unaffected: `5.15.221 to 5.15.*, inclusive` (semver)
  - unaffected: `6.1.188 to 6.1.*, inclusive` (semver)
  - unaffected: `6.6.157 to 6.6.*, inclusive` (semver)
  - unaffected: `6.12.109 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

## 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:** 0.0018, the 8th 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-2026-89525](https://www.cve.org/CVERecord?id=CVE-2026-89525)
- [NVD: CVE-2026-89525](https://nvd.nist.gov/vuln/detail/CVE-2026-89525)

### References from the CNA

- <https://git.kernel.org/stable/c/f64e01a90326bb85a3cc8aa0199931dc2f15b589>
- <https://git.kernel.org/stable/c/8a8c1c42a34349a0626d910abbad5a29136446b7>
- <https://git.kernel.org/stable/c/19f36c6453cd88fe6d60ef36ab1f1cad8ddf4ce4>
- <https://git.kernel.org/stable/c/b77b83f5529a26d084d64ece98abd6f0cc86e053>
- <https://git.kernel.org/stable/c/9193368408d792cec2057628d87862140fb1ce1c>
- <https://git.kernel.org/stable/c/b95c33a4e743874f1b0a45bf2aaa4da553552bd1>
- <https://git.kernel.org/stable/c/1bd7947f1463c21edafa256d0fbec5b99215e2b6>
- <https://git.kernel.org/stable/c/cac0cb07f29ccfb373fd4a36c81e908ef3ce608c>

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-2026-89525>
- Everything that needs attention now: <https://agentprime.io/advisories/critical.md>

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The web page: <https://agentprime.io/advisories/CVE-2026-89525/>. Everything for agents: <https://agentprime.io/llms.txt>.