# f2fs: fix valid block count leak on data block allocation failure

CVE record · `CVE-2026-89830`

- **Identifiers:** `CVE-2026-89830`
- **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: `7d009e048d7cfcc21d400f2aba4c8bacbdebbd47 to before 2d50b6d47e5671ff6a25834c5906d443356191f0` (git)
  - affected: `7d009e048d7cfcc21d400f2aba4c8bacbdebbd47 to before dde99df5a9d3b0ca6ac0a86f98799685f7399432` (git)
  - affected: `7d009e048d7cfcc21d400f2aba4c8bacbdebbd47 to before 931e1aa4d44c52ff8e0feb38420a8827c62e886b` (git)
  - affected: `7d009e048d7cfcc21d400f2aba4c8bacbdebbd47 to before 0f9af07ecc1ab486038373db6ae0436c5d674b19` (git)
  - Other versions: unaffected
- Vendor: Linux. Product: Linux.
  - affected: `6.9`
  - unaffected: `before 6.9` (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:** 0.0021, the 11th 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-2026-89830](https://www.cve.org/CVERecord?id=CVE-2026-89830)
- [NVD: CVE-2026-89830](https://nvd.nist.gov/vuln/detail/CVE-2026-89830)

### References from the CNA

- <https://git.kernel.org/stable/c/2d50b6d47e5671ff6a25834c5906d443356191f0>
- <https://git.kernel.org/stable/c/dde99df5a9d3b0ca6ac0a86f98799685f7399432>
- <https://git.kernel.org/stable/c/931e1aa4d44c52ff8e0feb38420a8827c62e886b>
- <https://git.kernel.org/stable/c/0f9af07ecc1ab486038373db6ae0436c5d674b19>

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-2026-89830>
- Everything that needs attention now: <https://agentprime.io/advisories/critical.md>

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The web page: <https://agentprime.io/advisories/CVE-2026-89830/>. Everything for agents: <https://agentprime.io/llms.txt>.