# batman-adv: dat: acquire ARP hw source only after skb realloc

CVE record · `CVE-2026-80600`

- **Identifiers:** `CVE-2026-80600`
- **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:** 29 Aug 2026
- **Reviewed by a person:** No

Published by the CVE Program (CNA: Linux) at 28 Aug 2026, 06:48 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: `b61ec31c85756bbc898fb892555509afe709459a to before a82fc217cb7a447313c76ebf9f09b100771b0ddf` (git)
  - affected: `b61ec31c85756bbc898fb892555509afe709459a to before 86aa79b43e5b561fd3648891165bd7313b541315` (git)
  - affected: `b61ec31c85756bbc898fb892555509afe709459a to before d755cd001fa2c248e186c1fc3df3d11d97dc843c` (git)
  - affected: `b61ec31c85756bbc898fb892555509afe709459a to before 3404be97b940a9b1ae1aea5fdbc6cdbbe9cd5146` (git)
  - affected: `b61ec31c85756bbc898fb892555509afe709459a to before 01678c53a7717a748aee388b6839e7b9761d641c` (git)
  - affected: `b61ec31c85756bbc898fb892555509afe709459a to before 3b4c70c40f2e135a50cd38fc61c7d23a296a9981` (git)
  - affected: `b61ec31c85756bbc898fb892555509afe709459a to before 059a70e1d12d6d99310e0599d37b0323557569a8` (git)
  - affected: `b61ec31c85756bbc898fb892555509afe709459a to before 48067b2ae4504500a7093d9e1e16b42e70330480` (git)
  - Other versions: unaffected
- Vendor: Linux. Product: Linux.
  - affected: `5.1`
  - unaffected: `before 5.1` (semver)
  - unaffected: `5.10.261 to 5.10.*, inclusive` (semver)
  - unaffected: `5.15.212 to 5.15.*, inclusive` (semver)
  - unaffected: `6.1.178 to 6.1.*, inclusive` (semver)
  - unaffected: `6.6.145 to 6.6.*, inclusive` (semver)
  - unaffected: `6.12.97 to 6.12.*, inclusive` (semver)
  - unaffected: `6.18.40 to 6.18.*, inclusive` (semver)
  - unaffected: `7.1.5 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:** 0.0073, the 54th 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-2026-80600](https://www.cve.org/CVERecord?id=CVE-2026-80600)
- [NVD: CVE-2026-80600](https://nvd.nist.gov/vuln/detail/CVE-2026-80600)

### References from the CNA

- <https://git.kernel.org/stable/c/a82fc217cb7a447313c76ebf9f09b100771b0ddf>
- <https://git.kernel.org/stable/c/86aa79b43e5b561fd3648891165bd7313b541315>
- <https://git.kernel.org/stable/c/d755cd001fa2c248e186c1fc3df3d11d97dc843c>
- <https://git.kernel.org/stable/c/3404be97b940a9b1ae1aea5fdbc6cdbbe9cd5146>
- <https://git.kernel.org/stable/c/01678c53a7717a748aee388b6839e7b9761d641c>
- <https://git.kernel.org/stable/c/3b4c70c40f2e135a50cd38fc61c7d23a296a9981>
- <https://git.kernel.org/stable/c/059a70e1d12d6d99310e0599d37b0323557569a8>
- <https://git.kernel.org/stable/c/48067b2ae4504500a7093d9e1e16b42e70330480>

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-2026-80600>
- Everything that needs attention now: <https://agentprime.io/advisories/critical.md>

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The web page: <https://agentprime.io/advisories/CVE-2026-80600/>. Everything for agents: <https://agentprime.io/llms.txt>.