# vxlan: keep the last remote linked during FDB flush

CVE record · `CVE-2026-80838`

- **Identifiers:** `CVE-2026-80838`
- **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: `c499fccb71cb85902b5c5b9ce9c9ae6683e54a8f to before 2a7c2f00843225d5f037676bca649321f3d024c7` (git)
  - affected: `c499fccb71cb85902b5c5b9ce9c9ae6683e54a8f to before a8820c8a7718327e96849782033e7c85a0f6bcfe` (git)
  - affected: `c499fccb71cb85902b5c5b9ce9c9ae6683e54a8f to before 8ba68fd6cdd1e3c92b92f25c7e48bf7bd51a183c` (git)
  - affected: `c499fccb71cb85902b5c5b9ce9c9ae6683e54a8f to before 4bbc76ee1b21d3bd045d6d819b2bacd30a6372ab` (git)
  - affected: `c499fccb71cb85902b5c5b9ce9c9ae6683e54a8f to before d5d4a7b538b52db63927773a8905fcd9f78a42e2` (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-2026-80838](https://www.cve.org/CVERecord?id=CVE-2026-80838)
- [NVD: CVE-2026-80838](https://nvd.nist.gov/vuln/detail/CVE-2026-80838)

### References from the CNA

- <https://git.kernel.org/stable/c/2a7c2f00843225d5f037676bca649321f3d024c7>
- <https://git.kernel.org/stable/c/a8820c8a7718327e96849782033e7c85a0f6bcfe>
- <https://git.kernel.org/stable/c/8ba68fd6cdd1e3c92b92f25c7e48bf7bd51a183c>
- <https://git.kernel.org/stable/c/4bbc76ee1b21d3bd045d6d819b2bacd30a6372ab>
- <https://git.kernel.org/stable/c/d5d4a7b538b52db63927773a8905fcd9f78a42e2>

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-2026-80838>
- Everything that needs attention now: <https://agentprime.io/advisories/critical.md>

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The web page: <https://agentprime.io/advisories/CVE-2026-80838/>. Everything for agents: <https://agentprime.io/llms.txt>.