# vxlan: fix reading neigh ha

CVE record · `CVE-2026-90105`

- **Identifiers:** `CVE-2026-90105`
- **State:** Confirmed
- **Severity:** No CVSS score
- **Critical:** No
- **CNA:** Linux
- **Technologies:** [Linux kernel](https://agentprime.io/advisories/technology/linux-kernel.md)
- **Published:** 17 Sept 2026
- **Updated:** 30 Oct 2026
- **Reviewed by a person:** No

Published by the CVE Program (CNA: Linux) at 17 Sept 2026, 16:06 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: `e4f67addf158f98f8197e08974966b18480dc751 to before a1e86c5b4463178751a9fd3f0a3876a602dc360c` (git)
  - affected: `e4f67addf158f98f8197e08974966b18480dc751 to before 6093baf2b2c57e7da33bacd2223570a78b416d89` (git)
  - affected: `e4f67addf158f98f8197e08974966b18480dc751 to before 751cb520f9e47538b7223df133806a29fc41f54f` (git)
  - affected: `e4f67addf158f98f8197e08974966b18480dc751 to before f43ef9a3f9c121472a0754c9e9bff13317ace0f7` (git)
  - affected: `e4f67addf158f98f8197e08974966b18480dc751 to before ecc8bac11a101e5f6989a14b92e17b51f9761630` (git)
  - affected: `e4f67addf158f98f8197e08974966b18480dc751 to before b824059a673b2283e78c7aae2c7d257aad7f0e1d` (git)
  - Other versions: unaffected
- Vendor: Linux. Product: Linux.
  - affected: `3.8`
  - unaffected: `before 3.8` (semver)
  - unaffected: `6.1.191 to 6.1.*, inclusive` (semver)
  - unaffected: `6.6.160 to 6.6.*, inclusive` (semver)
  - unaffected: `6.12.114 to 6.12.*, inclusive` (semver)
  - unaffected: `6.18.57 to 6.18.*, inclusive` (semver)
  - unaffected: `7.2.6 to 7.2.*, inclusive` (semver)
  - unaffected: `7.3 to *, inclusive` (original_commit_for_fix)
  - Other versions: affected

## Machine-written summary

Summary written by Claude Haiku from the source advisory. Not reviewed by a person.

> The Linux kernel's vxlan driver can read a neighbor's hardware address partially while that entry is being updated, during ARP/neighbor reduction. The source gives few details on attacker requirements or impact. Upgrade to 6.1.191, 6.6.160, 6.12.114, or 6.18.57, or to a later release in the same series.

Written 12 Nov 2026.

## 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:** 0.0022, the 11th percentile, on 13 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 17 Sept 2026. New records show when each source confirmed them.

## Sources

- [CVE List: CVE-2026-90105](https://www.cve.org/CVERecord?id=CVE-2026-90105)
- [NVD: CVE-2026-90105](https://nvd.nist.gov/vuln/detail/CVE-2026-90105)

### References from the CNA

- <https://git.kernel.org/stable/c/a1e86c5b4463178751a9fd3f0a3876a602dc360c>
- <https://git.kernel.org/stable/c/6093baf2b2c57e7da33bacd2223570a78b416d89>
- <https://git.kernel.org/stable/c/751cb520f9e47538b7223df133806a29fc41f54f>
- <https://git.kernel.org/stable/c/f43ef9a3f9c121472a0754c9e9bff13317ace0f7>
- <https://git.kernel.org/stable/c/ecc8bac11a101e5f6989a14b92e17b51f9761630>
- <https://git.kernel.org/stable/c/b824059a673b2283e78c7aae2c7d257aad7f0e1d>

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-2026-90105>
- Everything that needs attention now: <https://agentprime.io/advisories/critical.md>

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The web page: <https://agentprime.io/advisories/CVE-2026-90105/>. Everything for agents: <https://agentprime.io/llms.txt>.