# dm array: reject an array block whose value size is not the caller's

CVE record · `CVE-2026-89573`

- **Identifiers:** `CVE-2026-89573`
- **State:** Confirmed
- **Severity:** CVSS 7.8 High
- **Critical:** No
- **CNA:** Linux
- **Technologies:** [Linux kernel](https://agentprime.io/advisories/technology/linux-kernel.md)
- **Published:** 11 Sept 2026
- **Updated:** 19 Oct 2026
- **Reviewed by a person:** No

Published by the CVE Program (CNA: Linux) at 11 Sept 2026, 19:44 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: `6513c29f44f2cc970c0e9fecfe5a6526c3e73025 to before 35cd3b278448c79614f65ab6bbc9ed348d847df9` (git)
  - affected: `6513c29f44f2cc970c0e9fecfe5a6526c3e73025 to before a8237cb8fa0a628d903e76635bfdeae4202036b9` (git)
  - affected: `6513c29f44f2cc970c0e9fecfe5a6526c3e73025 to before a530a9a419a7c5fdb7dae55ffa2dd7a130631842` (git)
  - affected: `6513c29f44f2cc970c0e9fecfe5a6526c3e73025 to before 522fa26da24ccaa298ebe3c1c97395d2d63dfc21` (git)
  - affected: `6513c29f44f2cc970c0e9fecfe5a6526c3e73025 to before 7bf4b5cb42a4e27f36bcbc6209d82a5da9c0168c` (git)
  - affected: `6513c29f44f2cc970c0e9fecfe5a6526c3e73025 to before ac4a5eb8b002a0742c938fc98b922e243f53573a` (git)
  - affected: `6513c29f44f2cc970c0e9fecfe5a6526c3e73025 to before cb409b38b0232ee4385ef55cddcd6fbdd011a8a2` (git)
  - affected: `6513c29f44f2cc970c0e9fecfe5a6526c3e73025 to before 4538a287bdf5d0f9a379c678e5262b9f5783f547` (git)
  - Other versions: unaffected
- Vendor: Linux. Product: Linux.
  - affected: `3.9`
  - unaffected: `before 3.9` (semver)
  - unaffected: `5.10.270 to 5.10.*, inclusive` (semver)
  - unaffected: `5.15.221 to 5.15.*, inclusive` (semver)
  - unaffected: `6.1.188 to 6.1.*, inclusive` (semver)
  - unaffected: `6.6.157 to 6.6.*, inclusive` (semver)
  - unaffected: `6.12.109 to 6.12.*, inclusive` (semver)
  - unaffected: `6.18.50 to 6.18.*, inclusive` (semver)
  - unaffected: `7.2.4 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

- 7.8 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)

- **CISA KEV:** Not listed.
- **EPSS:** 0.0013, the 2nd 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 11 Sept 2026. New records show when each source confirmed them.

## Sources

- [CVE List: CVE-2026-89573](https://www.cve.org/CVERecord?id=CVE-2026-89573)
- [NVD: CVE-2026-89573](https://nvd.nist.gov/vuln/detail/CVE-2026-89573)

### References from the CNA

- <https://git.kernel.org/stable/c/35cd3b278448c79614f65ab6bbc9ed348d847df9>
- <https://git.kernel.org/stable/c/a8237cb8fa0a628d903e76635bfdeae4202036b9>
- <https://git.kernel.org/stable/c/a530a9a419a7c5fdb7dae55ffa2dd7a130631842>
- <https://git.kernel.org/stable/c/522fa26da24ccaa298ebe3c1c97395d2d63dfc21>
- <https://git.kernel.org/stable/c/7bf4b5cb42a4e27f36bcbc6209d82a5da9c0168c>
- <https://git.kernel.org/stable/c/ac4a5eb8b002a0742c938fc98b922e243f53573a>
- <https://git.kernel.org/stable/c/cb409b38b0232ee4385ef55cddcd6fbdd011a8a2>
- <https://git.kernel.org/stable/c/4538a287bdf5d0f9a379c678e5262b9f5783f547>

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-2026-89573>
- Everything that needs attention now: <https://agentprime.io/advisories/critical.md>

---

The web page: <https://agentprime.io/advisories/CVE-2026-89573/>. Everything for agents: <https://agentprime.io/llms.txt>.