# vxlan: re-fetch eth header after route_shortcircuit()

CVE record · `CVE-2026-80681`

- **Identifiers:** `CVE-2026-80681`
- **State:** Confirmed
- **Severity:** CVSS 9.8 Critical
- **Critical:** Yes: CVSS 9+
- **CNA:** Linux
- **Technologies:** [Linux kernel](https://agentprime.io/advisories/technology/linux-kernel.md)
- **Published:** 28 Aug 2026
- **Updated:** 16 Oct 2026
- **Reviewed by a person:** No

Published by the CVE Program (CNA: Linux) at 28 Aug 2026, 06:52 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.

## Critical

Critical, because:

- CVSS score 9.8: 9.0 or more.

How we decide what’s critical: <https://agentprime.io/advisories/critical.md>

## Affected products, as the CNA wrote them

- Vendor: Linux. Product: Linux.
  - affected: `ae8840825605f36f98f247323edc150e761cb64e to before 6375093eb45cd7d89f1945f939eeae3b29d79f56` (git)
  - affected: `ae8840825605f36f98f247323edc150e761cb64e to before 1b7f7b653e3557690047c62f03b80a24ea5a58a5` (git)
  - affected: `ae8840825605f36f98f247323edc150e761cb64e to before bf045341dfb3e767f0ff94cf240ce3c371973bd4` (git)
  - affected: `ae8840825605f36f98f247323edc150e761cb64e to before 2355c8c26d2aa1b4385b369e67202e47d460d555` (git)
  - affected: `ae8840825605f36f98f247323edc150e761cb64e to before 1511631b7cfc4152b10a0a9d04c7a0bf2ddf4585` (git)
  - affected: `ae8840825605f36f98f247323edc150e761cb64e to before 1235e017aa11cf01e91b613c4c5ed6aa28934fff` (git)
  - affected: `ae8840825605f36f98f247323edc150e761cb64e to before c9dceac9e1c7c772c43c732fc0d325e72835801a` (git)
  - affected: `ae8840825605f36f98f247323edc150e761cb64e to before 1395a676ec15a0a02a2a6d86602324f2d5fd41d5` (git)
  - Other versions: unaffected
- Vendor: Linux. Product: Linux.
  - affected: `3.10`
  - unaffected: `before 3.10` (semver)
  - unaffected: `5.10.265 to 5.10.*, inclusive` (semver)
  - unaffected: `5.15.216 to 5.15.*, inclusive` (semver)
  - unaffected: `6.1.183 to 6.1.*, inclusive` (semver)
  - unaffected: `6.6.151 to 6.6.*, inclusive` (semver)
  - unaffected: `6.12.103 to 6.12.*, inclusive` (semver)
  - unaffected: `6.18.44 to 6.18.*, inclusive` (semver)
  - unaffected: `7.1.8 to 7.1.*, inclusive` (semver)
  - unaffected: `7.2 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

- 9.8 Critical, CVSS 3.1: `CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H`, from CNA (Linux)

- **CISA KEV:** Not listed.
- **EPSS:** 0.0050, the 43rd percentile, on 15 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 28 Aug 2026. New records show when each source confirmed them.

## Sources

- [CVE List: CVE-2026-80681](https://www.cve.org/CVERecord?id=CVE-2026-80681)
- [NVD: CVE-2026-80681](https://nvd.nist.gov/vuln/detail/CVE-2026-80681)

### References from the CNA

- <https://git.kernel.org/stable/c/6375093eb45cd7d89f1945f939eeae3b29d79f56>
- <https://git.kernel.org/stable/c/1b7f7b653e3557690047c62f03b80a24ea5a58a5>
- <https://git.kernel.org/stable/c/bf045341dfb3e767f0ff94cf240ce3c371973bd4>
- <https://git.kernel.org/stable/c/2355c8c26d2aa1b4385b369e67202e47d460d555>
- <https://git.kernel.org/stable/c/1511631b7cfc4152b10a0a9d04c7a0bf2ddf4585>
- <https://git.kernel.org/stable/c/1235e017aa11cf01e91b613c4c5ed6aa28934fff>
- <https://git.kernel.org/stable/c/c9dceac9e1c7c772c43c732fc0d325e72835801a>
- <https://git.kernel.org/stable/c/1395a676ec15a0a02a2a6d86602324f2d5fd41d5>

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-2026-80681>
- Everything that needs attention now: <https://agentprime.io/advisories/critical.md>

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The web page: <https://agentprime.io/advisories/CVE-2026-80681/>. Everything for agents: <https://agentprime.io/llms.txt>.