# f2fs: validate MOVE_RANGE destination size

CVE record · `CVE-2026-89840`

- **Identifiers:** `CVE-2026-89840`
- **State:** Confirmed
- **Severity:** CVSS 7.1 High
- **Critical:** No
- **CNA:** Linux
- **Technologies:** [Linux kernel](https://agentprime.io/advisories/technology/linux-kernel.md)
- **Published:** 16 Sept 2026
- **Updated:** 30 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: `4dd6f977fc778e5a0da604e5f8cb2f36d163d27b to before 454de20a5a36c000b75f49337aae8c92045c5242` (git)
  - affected: `4dd6f977fc778e5a0da604e5f8cb2f36d163d27b to before 54c587f3f95ce2d6932a16566db83f73cc4313e1` (git)
  - affected: `4dd6f977fc778e5a0da604e5f8cb2f36d163d27b to before bca61ee5192ea47003722486ae9588a2a4bb47b6` (git)
  - affected: `4dd6f977fc778e5a0da604e5f8cb2f36d163d27b to before db13064669526494cd78ba3a4394063b740e940c` (git)
  - affected: `4dd6f977fc778e5a0da604e5f8cb2f36d163d27b to before dcae1eeda53149f219dd6af93b3083b7271c1c63` (git)
  - affected: `4dd6f977fc778e5a0da604e5f8cb2f36d163d27b to before e533889fc26aea0cd83c90327063f272061dd820` (git)
  - Other versions: unaffected
- Vendor: Linux. Product: Linux.
  - affected: `4.8`
  - unaffected: `before 4.8` (semver)
  - unaffected: `6.1.191 to 6.1.*, inclusive` (semver)
  - unaffected: `6.6.160 to 6.6.*, inclusive` (semver)
  - unaffected: `6.12.112 to 6.12.*, inclusive` (semver)
  - unaffected: `6.18.53 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

- 7.1 High, CVSS 3.1: `CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H`, from CNA (Linux)

- **CISA KEV:** Not listed.
- **EPSS:** 0.0016, the 5th 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-2026-89840](https://www.cve.org/CVERecord?id=CVE-2026-89840)
- [NVD: CVE-2026-89840](https://nvd.nist.gov/vuln/detail/CVE-2026-89840)

### References from the CNA

- <https://git.kernel.org/stable/c/454de20a5a36c000b75f49337aae8c92045c5242>
- <https://git.kernel.org/stable/c/54c587f3f95ce2d6932a16566db83f73cc4313e1>
- <https://git.kernel.org/stable/c/bca61ee5192ea47003722486ae9588a2a4bb47b6>
- <https://git.kernel.org/stable/c/db13064669526494cd78ba3a4394063b740e940c>
- <https://git.kernel.org/stable/c/dcae1eeda53149f219dd6af93b3083b7271c1c63>
- <https://git.kernel.org/stable/c/e533889fc26aea0cd83c90327063f272061dd820>

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-2026-89840>
- Everything that needs attention now: <https://agentprime.io/advisories/critical.md>

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The web page: <https://agentprime.io/advisories/CVE-2026-89840/>. Everything for agents: <https://agentprime.io/llms.txt>.