# netlink: reset skb headers before unicast and multicast filtering

CVE record · `CVE-2026-99211`

- **Identifiers:** `CVE-2026-99211`
- **State:** Confirmed
- **Severity:** No CVSS score
- **Critical:** No
- **CNA:** Linux
- **Technologies:** [Linux kernel](https://agentprime.io/advisories/technology/linux-kernel.md)
- **Published:** 28 Oct 2026
- **Updated:** 30 Oct 2026
- **Reviewed by a person:** No

Published by the CVE Program (CNA: Linux) at 28 Oct 2026, 10:36 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: `b1153f29ee07dc1a788964409255a4b4fae50b98 to before 4123f8d2099863e2421187af9d87b45e8eebd867` (git)
  - affected: `b1153f29ee07dc1a788964409255a4b4fae50b98 to before 6ec7cc02458c6a1509377a7f2eec9c7b1a355b5e` (git)
  - affected: `b1153f29ee07dc1a788964409255a4b4fae50b98 to before ea0e0fc4c72f71bd6d8bf460bfe309b61c35b548` (git)
  - affected: `b1153f29ee07dc1a788964409255a4b4fae50b98 to before c69db9e1f5cf886d4e3011313761a0f63a1d0da0` (git)
  - affected: `b1153f29ee07dc1a788964409255a4b4fae50b98 to before 06791594274f87c29f1a9f1961d700272716a49d` (git)
  - affected: `b1153f29ee07dc1a788964409255a4b4fae50b98 to before 06935da5de83aa8b98841563894857e7d2f80e47` (git)
  - affected: `b1153f29ee07dc1a788964409255a4b4fae50b98 to before 8bf659bd54e1f00e34cf5244b1d289c506fa47c0` (git)
  - Other versions: unaffected
- Vendor: Linux. Product: Linux.
  - affected: `2.6.26`
  - unaffected: `before 2.6.26` (semver)
  - unaffected: `5.10.273 to 5.10.*, inclusive` (semver)
  - unaffected: `5.15.224 to 5.15.*, inclusive` (semver)
  - unaffected: `6.6.161 to 6.6.*, inclusive` (semver)
  - unaffected: `6.12.115 to 6.12.*, inclusive` (semver)
  - unaffected: `6.18.59 to 6.18.*, inclusive` (semver)
  - unaffected: `7.2.13 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 5th percentile, on 5 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 Oct 2026. New records show when each source confirmed them.

## Sources

- [CVE List: CVE-2026-99211](https://www.cve.org/CVERecord?id=CVE-2026-99211)
- [NVD: CVE-2026-99211](https://nvd.nist.gov/vuln/detail/CVE-2026-99211)

### References from the CNA

- <https://git.kernel.org/stable/c/4123f8d2099863e2421187af9d87b45e8eebd867>
- <https://git.kernel.org/stable/c/6ec7cc02458c6a1509377a7f2eec9c7b1a355b5e>
- <https://git.kernel.org/stable/c/ea0e0fc4c72f71bd6d8bf460bfe309b61c35b548>
- <https://git.kernel.org/stable/c/c69db9e1f5cf886d4e3011313761a0f63a1d0da0>
- <https://git.kernel.org/stable/c/06791594274f87c29f1a9f1961d700272716a49d>
- <https://git.kernel.org/stable/c/06935da5de83aa8b98841563894857e7d2f80e47>
- <https://git.kernel.org/stable/c/8bf659bd54e1f00e34cf5244b1d289c506fa47c0>

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-2026-99211>
- Everything that needs attention now: <https://agentprime.io/advisories/critical.md>

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The web page: <https://agentprime.io/advisories/CVE-2026-99211/>. Everything for agents: <https://agentprime.io/llms.txt>.