# openvswitch: Fix CT limit teardown use-after-free

CVE record · `CVE-2026-89488`

- **Identifiers:** `CVE-2026-89488`
- **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, 19:43 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: `11efd5cb04a184eea4f57b68ea63dddd463158d1 to before 239f26589a6926db28c436e14f28517581ef1385` (git)
  - affected: `11efd5cb04a184eea4f57b68ea63dddd463158d1 to before 3b9369881b403f4cdbb11fa998554382bdcc3d8c` (git)
  - affected: `11efd5cb04a184eea4f57b68ea63dddd463158d1 to before 3b41d907400cc1dd1da9555b81dca422b1f44433` (git)
  - affected: `11efd5cb04a184eea4f57b68ea63dddd463158d1 to before 680f20d5937fa4d1367c59fe83091b78041015f5` (git)
  - affected: `11efd5cb04a184eea4f57b68ea63dddd463158d1 to before bf4aaa7ea2579e24ed7de2e20578a875bebca011` (git)
  - affected: `11efd5cb04a184eea4f57b68ea63dddd463158d1 to before e15407c3a8a005324f633cd46cd8fb58042c1157` (git)
  - affected: `11efd5cb04a184eea4f57b68ea63dddd463158d1 to before 6a6d36fadb8537d9b79e72c9fa51885ec0c33e10` (git)
  - affected: `11efd5cb04a184eea4f57b68ea63dddd463158d1 to before 403f96c32c9e24600093d7d0c61c17daeedca957` (git)
  - Other versions: unaffected
- Vendor: Linux. Product: Linux.
  - affected: `4.18`
  - unaffected: `before 4.18` (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: `6.12.110 to 6.12.*, inclusive` (semver)
  - unaffected: `6.18.51 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-2026-89488](https://www.cve.org/CVERecord?id=CVE-2026-89488)
- [NVD: CVE-2026-89488](https://nvd.nist.gov/vuln/detail/CVE-2026-89488)

### References from the CNA

- <https://git.kernel.org/stable/c/239f26589a6926db28c436e14f28517581ef1385>
- <https://git.kernel.org/stable/c/3b9369881b403f4cdbb11fa998554382bdcc3d8c>
- <https://git.kernel.org/stable/c/3b41d907400cc1dd1da9555b81dca422b1f44433>
- <https://git.kernel.org/stable/c/680f20d5937fa4d1367c59fe83091b78041015f5>
- <https://git.kernel.org/stable/c/bf4aaa7ea2579e24ed7de2e20578a875bebca011>
- <https://git.kernel.org/stable/c/e15407c3a8a005324f633cd46cd8fb58042c1157>
- <https://git.kernel.org/stable/c/6a6d36fadb8537d9b79e72c9fa51885ec0c33e10>
- <https://git.kernel.org/stable/c/403f96c32c9e24600093d7d0c61c17daeedca957>

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-2026-89488>
- Everything that needs attention now: <https://agentprime.io/advisories/critical.md>

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The web page: <https://agentprime.io/advisories/CVE-2026-89488/>. Everything for agents: <https://agentprime.io/llms.txt>.