# dm-crypt: reject the lmk IV mode with AEAD ciphers

CVE record · `CVE-2026-99037`

- **Identifiers:** `CVE-2026-99037`
- **State:** Confirmed
- **Severity:** No CVSS score
- **Critical:** No
- **CNA:** Linux
- **Technologies:** [Linux kernel](https://agentprime.io/advisories/technology/linux-kernel.md)
- **Published:** 23 Oct 2026
- **Updated:** 30 Oct 2026
- **Reviewed by a person:** No

Published by the CVE Program (CNA: Linux) at 23 Oct 2026, 12:21 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: `33d2f09fcb357fd1861c4959d1d3505492bf91f8 to before a04546fa65cbcf4a2774f93f365d747a19abb9b8` (git)
  - affected: `33d2f09fcb357fd1861c4959d1d3505492bf91f8 to before 412d1c1f490ed9ec5bd029883e8a626626613a70` (git)
  - affected: `33d2f09fcb357fd1861c4959d1d3505492bf91f8 to before a50e830ded5a0d0cb9e897d1521716ba654f8c3e` (git)
  - affected: `33d2f09fcb357fd1861c4959d1d3505492bf91f8 to before 9a0dab8a9d9975dec14a118b55cae2517aea5ca9` (git)
  - affected: `33d2f09fcb357fd1861c4959d1d3505492bf91f8 to before 962ce265fbf5d87afeb78cf19c12e083ab0ffeb8` (git)
  - affected: `33d2f09fcb357fd1861c4959d1d3505492bf91f8 to before a1a875614dae43b43d311bb9e7a7a70eed78efe6` (git)
  - affected: `33d2f09fcb357fd1861c4959d1d3505492bf91f8 to before 40ea7dfa8cd5f9aed72a55c9ca3008aee5880e6f` (git)
  - affected: `33d2f09fcb357fd1861c4959d1d3505492bf91f8 to before 3195e0daf590683992edb4eed32269e569e04924` (git)
  - Other versions: unaffected
- Vendor: Linux. Product: Linux.
  - affected: `4.12`
  - unaffected: `before 4.12` (semver)
  - unaffected: `5.10.273 to 5.10.*, inclusive` (semver)
  - unaffected: `5.15.224 to 5.15.*, inclusive` (semver)
  - unaffected: `6.1.191 to 6.1.*, inclusive` (semver)
  - unaffected: `6.6.160 to 6.6.*, inclusive` (semver)
  - unaffected: `6.12.113 to 6.12.*, inclusive` (semver)
  - unaffected: `6.18.57 to 6.18.*, inclusive` (semver)
  - unaffected: `7.2.11 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:** 0.0018, the 7th percentile, on 9 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 23 Oct 2026. New records show when each source confirmed them.

## Sources

- [CVE List: CVE-2026-99037](https://www.cve.org/CVERecord?id=CVE-2026-99037)
- [NVD: CVE-2026-99037](https://nvd.nist.gov/vuln/detail/CVE-2026-99037)

### References from the CNA

- <https://git.kernel.org/stable/c/a04546fa65cbcf4a2774f93f365d747a19abb9b8>
- <https://git.kernel.org/stable/c/412d1c1f490ed9ec5bd029883e8a626626613a70>
- <https://git.kernel.org/stable/c/a50e830ded5a0d0cb9e897d1521716ba654f8c3e>
- <https://git.kernel.org/stable/c/9a0dab8a9d9975dec14a118b55cae2517aea5ca9>
- <https://git.kernel.org/stable/c/962ce265fbf5d87afeb78cf19c12e083ab0ffeb8>
- <https://git.kernel.org/stable/c/a1a875614dae43b43d311bb9e7a7a70eed78efe6>
- <https://git.kernel.org/stable/c/40ea7dfa8cd5f9aed72a55c9ca3008aee5880e6f>
- <https://git.kernel.org/stable/c/3195e0daf590683992edb4eed32269e569e04924>

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-2026-99037>
- Everything that needs attention now: <https://agentprime.io/advisories/critical.md>

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The web page: <https://agentprime.io/advisories/CVE-2026-99037/>. Everything for agents: <https://agentprime.io/llms.txt>.