# crypto: algif_aead - Revert to operating out-of-place

CVE record · `CVE-2026-31431`

- **Identifiers:** `CVE-2026-31431`
- **State:** Confirmed
- **Severity:** CVSS 7.8 High
- **Critical:** Yes: KEV, CVSS 7+ and EPSS
- **CNA:** Linux
- **Weakness (CWE):** [CWE-669](https://cwe.mitre.org/data/definitions/669.html) · [CWE-1288](https://cwe.mitre.org/data/definitions/1288.html)
- **Tags:** [CWE-669](https://agentprime.io/advisories/tag/cwe-669.md) · [CWE-1288](https://agentprime.io/advisories/tag/cwe-1288.md)
- **Technologies:** [Linux kernel](https://agentprime.io/advisories/technology/linux-kernel.md)
- **Published:** 22 Apr 2026
- **Updated:** 15 Oct 2026
- **Reviewed by a person:** No

Published by the CVE Program (CNA: Linux) at 22 Apr 2026, 08:15 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.

## Critical

Critical, because:

- In CISA’s KEV catalogue since 1 May 2026: it is known to be exploited.
- CVSS score 7.8 (7.0 or more) and EPSS 0.98 (0.1 or more): a high score and a real chance of exploitation in the next 30 days.

How we decide what’s critical: <https://agentprime.io/advisories/critical.md>

## Affected products, as the CNA wrote them

- Vendor: Linux. Product: Linux.
  - affected: `72548b093ee38a6d4f2a19e6ef1948ae05c181f7 to before 893d22e0135fa394db81df88697fba6032747667` (git)
  - affected: `72548b093ee38a6d4f2a19e6ef1948ae05c181f7 to before 19d43105a97be0810edbda875f2cd03f30dc130c` (git)
  - affected: `72548b093ee38a6d4f2a19e6ef1948ae05c181f7 to before 961cfa271a918ad4ae452420e7c303149002875b` (git)
  - affected: `72548b093ee38a6d4f2a19e6ef1948ae05c181f7 to before 3115af9644c342b356f3f07a4dd1c8905cd9a6fc` (git)
  - affected: `72548b093ee38a6d4f2a19e6ef1948ae05c181f7 to before 8b88d99341f139e23bdeb1027a2a3ae10d341d82` (git)
  - affected: `72548b093ee38a6d4f2a19e6ef1948ae05c181f7 to before fafe0fa2995a0f7073c1c358d7d3145bcc9aedd8` (git)
  - affected: `72548b093ee38a6d4f2a19e6ef1948ae05c181f7 to before ce42ee423e58dffa5ec03524054c9d8bfd4f6237` (git)
  - affected: `72548b093ee38a6d4f2a19e6ef1948ae05c181f7 to before a664bf3d603dc3bdcf9ae47cc21e0daec706d7a5` (git)
  - Other versions: unaffected
- Vendor: Linux. Product: Linux.
  - affected: `4.14`
  - unaffected: `before 4.14` (semver)
  - unaffected: `5.10.254 to 5.10.*, inclusive` (semver)
  - unaffected: `5.15.204 to 5.15.*, inclusive` (semver)
  - unaffected: `6.1.170 to 6.1.*, inclusive` (semver)
  - unaffected: `6.6.137 to 6.6.*, inclusive` (semver)
  - unaffected: `6.12.85 to 6.12.*, inclusive` (semver)
  - unaffected: `6.18.22 to 6.18.*, inclusive` (semver)
  - unaffected: `6.19.12 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:** Listed since 1 May 2026: known to be exploited.
- **EPSS:** 0.98, the 99th 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 22 Apr 2026. New records show when each source confirmed them.

## Sources

- [CVE List: CVE-2026-31431](https://www.cve.org/CVERecord?id=CVE-2026-31431)
- [NVD: CVE-2026-31431](https://nvd.nist.gov/vuln/detail/CVE-2026-31431)

### References from the CNA

- <https://git.kernel.org/stable/c/893d22e0135fa394db81df88697fba6032747667>
- <https://git.kernel.org/stable/c/19d43105a97be0810edbda875f2cd03f30dc130c>
- <https://git.kernel.org/stable/c/961cfa271a918ad4ae452420e7c303149002875b>
- <https://git.kernel.org/stable/c/3115af9644c342b356f3f07a4dd1c8905cd9a6fc>
- <https://git.kernel.org/stable/c/8b88d99341f139e23bdeb1027a2a3ae10d341d82>
- <https://git.kernel.org/stable/c/fafe0fa2995a0f7073c1c358d7d3145bcc9aedd8>
- <https://git.kernel.org/stable/c/ce42ee423e58dffa5ec03524054c9d8bfd4f6237>
- <https://git.kernel.org/stable/c/a664bf3d603dc3bdcf9ae47cc21e0daec706d7a5>

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-2026-31431>
- Everything that needs attention now: <https://agentprime.io/advisories/critical.md>

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The web page: <https://agentprime.io/advisories/CVE-2026-31431/>. Everything for agents: <https://agentprime.io/llms.txt>.