# RISC-V: KVM: Fix PMU event info array size overflow

CVE record · `CVE-2026-89513`

- **Identifiers:** `CVE-2026-89513`
- **State:** Confirmed
- **Severity:** CVSS 8.8 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, 19:43 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: `e309fd113b9f6c34672a487be08fecb7e12e7e29 to before ddbd71a3780942918a7d116d666313e5b3304d73` (git)
  - affected: `e309fd113b9f6c34672a487be08fecb7e12e7e29 to before 82088f88c96b99c27a974d09b02c2b133262fadf` (git)
  - affected: `e309fd113b9f6c34672a487be08fecb7e12e7e29 to before 735bc20c24187ca419c9d5e63860a54b91be34bd` (git)
  - Other versions: unaffected
- Vendor: Linux. Product: Linux.
  - affected: `6.18`
  - unaffected: `before 6.18` (semver)
  - unaffected: `6.18.57 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

- 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 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-2026-89513](https://www.cve.org/CVERecord?id=CVE-2026-89513)
- [NVD: CVE-2026-89513](https://nvd.nist.gov/vuln/detail/CVE-2026-89513)

### References from the CNA

- <https://git.kernel.org/stable/c/ddbd71a3780942918a7d116d666313e5b3304d73>
- <https://git.kernel.org/stable/c/82088f88c96b99c27a974d09b02c2b133262fadf>
- <https://git.kernel.org/stable/c/735bc20c24187ca419c9d5e63860a54b91be34bd>

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-2026-89513>
- Everything that needs attention now: <https://agentprime.io/advisories/critical.md>

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The web page: <https://agentprime.io/advisories/CVE-2026-89513/>. Everything for agents: <https://agentprime.io/llms.txt>.