# net/tcp-ao: fix use-after-free of current_key on reconnect to another peer

CVE record · `CVE-2026-80849`

- **Identifiers:** `CVE-2026-80849`
- **State:** Confirmed
- **Severity:** No CVSS score
- **Critical:** No
- **CNA:** Linux
- **Technologies:** [Linux kernel](https://agentprime.io/advisories/technology/linux-kernel.md)
- **Published:** 4 Sept 2026
- **Updated:** 19 Oct 2026
- **Reviewed by a person:** No

Published by the CVE Program (CNA: Linux) at 4 Sept 2026, 15:54 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: `0a3a809089eb1d4a0a2fd0c16b520d603988c859 to before 84a93b4e012587d0a4a84ffb23ec6da18e9d85f9` (git)
  - affected: `0a3a809089eb1d4a0a2fd0c16b520d603988c859 to before 73fde8fe4469f4ed8f0afcc0b9d6413002a9e6b3` (git)
  - affected: `0a3a809089eb1d4a0a2fd0c16b520d603988c859 to before e54ad693eddb40c595add013f545354c538e325b` (git)
  - affected: `0a3a809089eb1d4a0a2fd0c16b520d603988c859 to before 2857dcbd03cf3354af0fba1b65c6a260fb43811a` (git)
  - affected: `0a3a809089eb1d4a0a2fd0c16b520d603988c859 to before da4471557f279d0f56605158a625bb6e49ef7d41` (git)
  - Other versions: unaffected
- Vendor: Linux. Product: Linux.
  - affected: `6.7`
  - unaffected: `before 6.7` (semver)
  - unaffected: `6.12.108 to 6.12.*, inclusive` (semver)
  - unaffected: `6.18.49 to 6.18.*, inclusive` (semver)
  - unaffected: `7.1.13 to 7.1.*, inclusive` (semver)
  - unaffected: `7.2.3 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

No source has published a CVSS score for this record yet.

- **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 4 Sept 2026. New records show when each source confirmed them.

## Sources

- [CVE List: CVE-2026-80849](https://www.cve.org/CVERecord?id=CVE-2026-80849)
- [NVD: CVE-2026-80849](https://nvd.nist.gov/vuln/detail/CVE-2026-80849)

### References from the CNA

- <https://git.kernel.org/stable/c/84a93b4e012587d0a4a84ffb23ec6da18e9d85f9>
- <https://git.kernel.org/stable/c/73fde8fe4469f4ed8f0afcc0b9d6413002a9e6b3>
- <https://git.kernel.org/stable/c/e54ad693eddb40c595add013f545354c538e325b>
- <https://git.kernel.org/stable/c/2857dcbd03cf3354af0fba1b65c6a260fb43811a>
- <https://git.kernel.org/stable/c/da4471557f279d0f56605158a625bb6e49ef7d41>

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-2026-80849>
- Everything that needs attention now: <https://agentprime.io/advisories/critical.md>

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The web page: <https://agentprime.io/advisories/CVE-2026-80849/>. Everything for agents: <https://agentprime.io/llms.txt>.