# net: openvswitch: fix flow mask use-after-free on flow deletion

CVE record · `CVE-2026-80994`

- **Identifiers:** `CVE-2026-80994`
- **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, 19:42 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: `56c19868e115fcf8d62d843e1b9616bb9837d0db to before ea5f7b45b582665541ddfb77dce98611354af4ab` (git)
  - affected: `56c19868e115fcf8d62d843e1b9616bb9837d0db to before 18ce1a8b7499c016d4a893d9b1db80608f73745d` (git)
  - affected: `56c19868e115fcf8d62d843e1b9616bb9837d0db to before c15ef9a5bf594f93a31de2ec2ec394e2a903519a` (git)
  - affected: `56c19868e115fcf8d62d843e1b9616bb9837d0db to before 64051fe200c7c759af71634bd2123552eaabb69a` (git)
  - affected: `56c19868e115fcf8d62d843e1b9616bb9837d0db to before 0ba5cbc2f049af94ec94ff6f64958545efc5eaa2` (git)
  - affected: `56c19868e115fcf8d62d843e1b9616bb9837d0db to before ac73e3af571da06c1d1cfe3f0f00dc978b851700` (git)
  - affected: `56c19868e115fcf8d62d843e1b9616bb9837d0db to before 7f072b84afd05a77963eb1872f7174e280661dce` (git)
  - affected: `56c19868e115fcf8d62d843e1b9616bb9837d0db to before 4e30317ff67a2eb12b4d890d39f72fd7e7117d48` (git)
  - Other versions: unaffected
- Vendor: Linux. Product: Linux.
  - affected: `3.16`
  - unaffected: `before 3.16` (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:** 0.0017, 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-2026-80994](https://www.cve.org/CVERecord?id=CVE-2026-80994)
- [NVD: CVE-2026-80994](https://nvd.nist.gov/vuln/detail/CVE-2026-80994)

### References from the CNA

- <https://git.kernel.org/stable/c/ea5f7b45b582665541ddfb77dce98611354af4ab>
- <https://git.kernel.org/stable/c/18ce1a8b7499c016d4a893d9b1db80608f73745d>
- <https://git.kernel.org/stable/c/c15ef9a5bf594f93a31de2ec2ec394e2a903519a>
- <https://git.kernel.org/stable/c/64051fe200c7c759af71634bd2123552eaabb69a>
- <https://git.kernel.org/stable/c/0ba5cbc2f049af94ec94ff6f64958545efc5eaa2>
- <https://git.kernel.org/stable/c/ac73e3af571da06c1d1cfe3f0f00dc978b851700>
- <https://git.kernel.org/stable/c/7f072b84afd05a77963eb1872f7174e280661dce>
- <https://git.kernel.org/stable/c/4e30317ff67a2eb12b4d890d39f72fd7e7117d48>

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-2026-80994>
- Everything that needs attention now: <https://agentprime.io/advisories/critical.md>

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The web page: <https://agentprime.io/advisories/CVE-2026-80994/>. Everything for agents: <https://agentprime.io/llms.txt>.