# KVM: x86/mmu: Consume the locked rmap value in the lockless rmap walk

CVE record · `CVE-2026-89928`

- **Identifiers:** `CVE-2026-89928`
- **State:** Confirmed
- **Severity:** CVSS 8.8 High
- **Critical:** No
- **CNA:** Linux
- **Technologies:** [Linux kernel](https://agentprime.io/advisories/technology/linux-kernel.md)
- **Published:** 16 Sept 2026
- **Updated:** 19 Oct 2026
- **Reviewed by a person:** No

Published by the CVE Program (CNA: Linux) at 16 Sept 2026, 10:32 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: `af3b6a9eba48419732b07a0472db7160282f0f39 to before 41debfc98526c0a95c41a62435aca0a70340a26d` (git)
  - affected: `af3b6a9eba48419732b07a0472db7160282f0f39 to before 8edb3c09e43f7cd8a5dfd291c6e0fc9c74d4621d` (git)
  - affected: `af3b6a9eba48419732b07a0472db7160282f0f39 to before e428f9779a43737d830111238816f1928b07aefb` (git)
  - Other versions: unaffected
- Vendor: Linux. Product: Linux.
  - affected: `6.15`
  - unaffected: `before 6.15` (semver)
  - unaffected: `6.18.51 to 6.18.*, inclusive` (semver)
  - unaffected: `7.2.5 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

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

- **CISA KEV:** Not listed.
- **EPSS:** 0.0017, the 6th percentile, on 15 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 16 Sept 2026. New records show when each source confirmed them.

## Sources

- [CVE List: CVE-2026-89928](https://www.cve.org/CVERecord?id=CVE-2026-89928)
- [NVD: CVE-2026-89928](https://nvd.nist.gov/vuln/detail/CVE-2026-89928)

### References from the CNA

- <https://git.kernel.org/stable/c/41debfc98526c0a95c41a62435aca0a70340a26d>
- <https://git.kernel.org/stable/c/8edb3c09e43f7cd8a5dfd291c6e0fc9c74d4621d>
- <https://git.kernel.org/stable/c/e428f9779a43737d830111238816f1928b07aefb>

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-2026-89928>
- Everything that needs attention now: <https://agentprime.io/advisories/critical.md>

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The web page: <https://agentprime.io/advisories/CVE-2026-89928/>. Everything for agents: <https://agentprime.io/llms.txt>.