# openvswitch: avoid reallocating confirmed conntrack labels

CVE record · `CVE-2026-98251`

- **Identifiers:** `CVE-2026-98251`
- **State:** Confirmed
- **Severity:** CVSS 7.8 High
- **Critical:** No
- **CNA:** Linux
- **Technologies:** [Linux kernel](https://agentprime.io/advisories/technology/linux-kernel.md)
- **Published:** 6 Oct 2026
- **Updated:** 19 Oct 2026
- **Reviewed by a person:** No

Published by the CVE Program (CNA: Linux) at 6 Oct 2026, 08:45 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: `c2ac667358708d7cce64c78f58af6adf4c1e848b to before 4371d79ea74407fb992c985b1f94391e35bb8289` (git)
  - affected: `c2ac667358708d7cce64c78f58af6adf4c1e848b to before 7ff688aceada1160331a789385ea146f62fbddf7` (git)
  - affected: `c2ac667358708d7cce64c78f58af6adf4c1e848b to before 05eab8dced6bf4d3009a6eeee16ddac99047dc83` (git)
  - affected: `c2ac667358708d7cce64c78f58af6adf4c1e848b to before 579d87ec1e1e85729a6cb2c25961e58beb78640c` (git)
  - affected: `c2ac667358708d7cce64c78f58af6adf4c1e848b to before 2e6dd889c325abf23821e1459c3ffef59b7f0009` (git)
  - affected: `c2ac667358708d7cce64c78f58af6adf4c1e848b to before d16f089bd700f45d720ce989d5495e1dc3be0cf8` (git)
  - affected: `c2ac667358708d7cce64c78f58af6adf4c1e848b to before 8c9fcc6c33950d3db551af664d1fd3d998bfee56` (git)
  - affected: `c2ac667358708d7cce64c78f58af6adf4c1e848b to before 3f118c8217c109fd13ca61caa301d72c483897ef` (git)
  - Other versions: unaffected
- Vendor: Linux. Product: Linux.
  - affected: `4.3`
  - unaffected: `before 4.3` (semver)
  - unaffected: `5.10.271 to 5.10.*, inclusive` (semver)
  - unaffected: `5.15.222 to 5.15.*, inclusive` (semver)
  - unaffected: `6.1.189 to 6.1.*, inclusive` (semver)
  - unaffected: `6.6.158 to 6.6.*, inclusive` (semver)
  - unaffected: `6.12.112 to 6.12.*, inclusive` (semver)
  - unaffected: `6.18.54 to 6.18.*, inclusive` (semver)
  - unaffected: `7.2.8 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 10 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 6 Oct 2026. New records show when each source confirmed them.

## Sources

- [CVE List: CVE-2026-98251](https://www.cve.org/CVERecord?id=CVE-2026-98251)
- [NVD: CVE-2026-98251](https://nvd.nist.gov/vuln/detail/CVE-2026-98251)

### References from the CNA

- <https://git.kernel.org/stable/c/4371d79ea74407fb992c985b1f94391e35bb8289>
- <https://git.kernel.org/stable/c/7ff688aceada1160331a789385ea146f62fbddf7>
- <https://git.kernel.org/stable/c/05eab8dced6bf4d3009a6eeee16ddac99047dc83>
- <https://git.kernel.org/stable/c/579d87ec1e1e85729a6cb2c25961e58beb78640c>
- <https://git.kernel.org/stable/c/2e6dd889c325abf23821e1459c3ffef59b7f0009>
- <https://git.kernel.org/stable/c/d16f089bd700f45d720ce989d5495e1dc3be0cf8>
- <https://git.kernel.org/stable/c/8c9fcc6c33950d3db551af664d1fd3d998bfee56>
- <https://git.kernel.org/stable/c/3f118c8217c109fd13ca61caa301d72c483897ef>

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-2026-98251>
- Everything that needs attention now: <https://agentprime.io/advisories/critical.md>

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The web page: <https://agentprime.io/advisories/CVE-2026-98251/>. Everything for agents: <https://agentprime.io/llms.txt>.