# gfs2: Fix use-after-free in iomap inline data write path

CVE record · `CVE-2026-45984`

- **Identifiers:** `CVE-2026-45984`
- **State:** Confirmed
- **Severity:** CVSS 7.8 High
- **Critical:** No
- **CNA:** Linux
- **Weakness (CWE):** [CWE-826](https://cwe.mitre.org/data/definitions/826.html)
- **Tags:** [CWE-826](https://agentprime.io/advisories/tag/cwe-826.md)
- **Technologies:** [Linux kernel](https://agentprime.io/advisories/technology/linux-kernel.md)
- **Published:** 27 May 2026
- **Updated:** 19 Oct 2026
- **Reviewed by a person:** No

Published by the CVE Program (CNA: Linux) at 27 May 2026, 12:18 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: `d0a22a4b03b8475b7aa3fa41243c26c291407844 to before 1403989d1b502f4a2c0d0b42ccf1c25748442eff` (git)
  - affected: `d0a22a4b03b8475b7aa3fa41243c26c291407844 to before 1cae1bafdf9caa9b462b19af06b1a06902e4e142` (git)
  - affected: `d0a22a4b03b8475b7aa3fa41243c26c291407844 to before 764c3c84b5683e608f43735c803a5f415046686c` (git)
  - affected: `d0a22a4b03b8475b7aa3fa41243c26c291407844 to before d87268326b277af3665237ac76a73dd9fa8e21b4` (git)
  - affected: `d0a22a4b03b8475b7aa3fa41243c26c291407844 to before 87d4954b5c59735a99ea98cb208d47130f6dce7d` (git)
  - affected: `d0a22a4b03b8475b7aa3fa41243c26c291407844 to before 6d76febba07c40bcf358f63216d36ea68cf1c215` (git)
  - affected: `d0a22a4b03b8475b7aa3fa41243c26c291407844 to before 815ddd27c0c7171a99fe802fdb19098ddef8b19d` (git)
  - affected: `d0a22a4b03b8475b7aa3fa41243c26c291407844 to before faddeb848305e79db89ee0479bb0e33380656321` (git)
  - Other versions: unaffected
- Vendor: Linux. Product: Linux.
  - affected: `5.2`
  - unaffected: `before 5.2` (semver)
  - unaffected: `5.10.252 to 5.10.*, inclusive` (semver)
  - unaffected: `5.15.202 to 5.15.*, inclusive` (semver)
  - unaffected: `6.1.165 to 6.1.*, inclusive` (semver)
  - unaffected: `6.6.128 to 6.6.*, inclusive` (semver)
  - unaffected: `6.12.75 to 6.12.*, inclusive` (semver)
  - unaffected: `6.18.14 to 6.18.*, inclusive` (semver)
  - unaffected: `6.19.4 to 6.19.*, inclusive` (semver)
  - unaffected: `7.0 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

- 7.8 High, CVSS 3.1: `CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H`, from CNA (Linux) (used for this record)
- 7.8 High, CVSS 3.1: `CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H`, from ADP (redhat-SADP)

- **CISA KEV:** Not listed.
- **EPSS:** 0.0018, the 8th percentile, on 6 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 27 May 2026. New records show when each source confirmed them.

## Sources

- [CVE List: CVE-2026-45984](https://www.cve.org/CVERecord?id=CVE-2026-45984)
- [NVD: CVE-2026-45984](https://nvd.nist.gov/vuln/detail/CVE-2026-45984)

### References from the CNA

- <https://git.kernel.org/stable/c/1403989d1b502f4a2c0d0b42ccf1c25748442eff>
- <https://git.kernel.org/stable/c/1cae1bafdf9caa9b462b19af06b1a06902e4e142>
- <https://git.kernel.org/stable/c/764c3c84b5683e608f43735c803a5f415046686c>
- <https://git.kernel.org/stable/c/d87268326b277af3665237ac76a73dd9fa8e21b4>
- <https://git.kernel.org/stable/c/87d4954b5c59735a99ea98cb208d47130f6dce7d>
- <https://git.kernel.org/stable/c/6d76febba07c40bcf358f63216d36ea68cf1c215>
- <https://git.kernel.org/stable/c/815ddd27c0c7171a99fe802fdb19098ddef8b19d>
- <https://git.kernel.org/stable/c/faddeb848305e79db89ee0479bb0e33380656321>

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-2026-45984>
- Everything that needs attention now: <https://agentprime.io/advisories/critical.md>

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The web page: <https://agentprime.io/advisories/CVE-2026-45984/>. Everything for agents: <https://agentprime.io/llms.txt>.