# xfs: fix freemap adjustments when adding xattrs to leaf blocks

CVE record · `CVE-2026-43158`

- **Identifiers:** `CVE-2026-43158`
- **State:** Confirmed
- **Severity:** CVSS 8.8 High
- **Critical:** No
- **CNA:** Linux
- **Weakness (CWE):** [CWE-664](https://cwe.mitre.org/data/definitions/664.html)
- **Tags:** [CWE-664](https://agentprime.io/advisories/tag/cwe-664.md)
- **Technologies:** [Linux kernel](https://agentprime.io/advisories/technology/linux-kernel.md)
- **Published:** 6 May 2026
- **Updated:** 19 Oct 2026
- **Reviewed by a person:** No

Published by the CVE Program (CNA: Linux) at 6 May 2026, 11:27 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 d08976725355b9d54d8332fce223fa281cc304a5` (git)
  - affected: `1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to before 6a8737afbccc340e718e0b22577312826390be8b` (git)
  - affected: `1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to before a396b3d73d51355e50acdb403ba9c4cae4c1174e` (git)
  - affected: `1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to before 38613c01f69e1e77e6b8acab1e8ac665d01c2f15` (git)
  - affected: `1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to before ef42a8766ff3fdf51cf72fb36d0859c09d134478` (git)
  - affected: `1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to before 43f3b18679615a93bd848afde3602ba160637a46` (git)
  - affected: `1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to before 24ce71852f2cee6581e2cbebc15489ed52bf63b7` (git)
  - affected: `1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to before 3eefc0c2b78444b64feeb3783c017d6adc3cd3ce` (git)
  - Other versions: unaffected
- Vendor: Linux. Product: Linux.
  - affected: `2.6.12`
  - unaffected: `before 2.6.12` (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: `6.18.16 to 6.18.*, inclusive` (semver)
  - unaffected: `6.19.6 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

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

- **CISA KEV:** Not listed.
- **EPSS:** 0.0047, the 40th percentile, on 5 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 6 May 2026. New records show when each source confirmed them.

## Sources

- [CVE List: CVE-2026-43158](https://www.cve.org/CVERecord?id=CVE-2026-43158)
- [NVD: CVE-2026-43158](https://nvd.nist.gov/vuln/detail/CVE-2026-43158)

### References from the CNA

- <https://git.kernel.org/stable/c/d08976725355b9d54d8332fce223fa281cc304a5>
- <https://git.kernel.org/stable/c/6a8737afbccc340e718e0b22577312826390be8b>
- <https://git.kernel.org/stable/c/a396b3d73d51355e50acdb403ba9c4cae4c1174e>
- <https://git.kernel.org/stable/c/38613c01f69e1e77e6b8acab1e8ac665d01c2f15>
- <https://git.kernel.org/stable/c/ef42a8766ff3fdf51cf72fb36d0859c09d134478>
- <https://git.kernel.org/stable/c/43f3b18679615a93bd848afde3602ba160637a46>
- <https://git.kernel.org/stable/c/24ce71852f2cee6581e2cbebc15489ed52bf63b7>
- <https://git.kernel.org/stable/c/3eefc0c2b78444b64feeb3783c017d6adc3cd3ce>

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-2026-43158>
- Everything that needs attention now: <https://agentprime.io/advisories/critical.md>

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The web page: <https://agentprime.io/advisories/CVE-2026-43158/>. Everything for agents: <https://agentprime.io/llms.txt>.