# batman-adv: mcast: linearize skbuff for packet generation

CVE record · `CVE-2026-89950`

- **Identifiers:** `CVE-2026-89950`
- **State:** Confirmed
- **Severity:** No CVSS score
- **Critical:** No
- **CNA:** Linux
- **Technologies:** [Linux kernel](https://agentprime.io/advisories/technology/linux-kernel.md)
- **Published:** 16 Sept 2026
- **Updated:** 19 Oct 2026
- **Reviewed by a person:** No

Published by the CVE Program (CNA: Linux) at 16 Sept 2026, 10:32 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: `90039133221e33964ccb4a536dad7eb0a372fff7 to before a9603e0a7cb5e0cddc6b23af153cf7daafc5c55e` (git)
  - affected: `90039133221e33964ccb4a536dad7eb0a372fff7 to before c32e5e25c41201c8c3b796a4ab2c45103187091e` (git)
  - affected: `90039133221e33964ccb4a536dad7eb0a372fff7 to before 2879177539e3ece483a8e5406970373698e9a6c5` (git)
  - affected: `90039133221e33964ccb4a536dad7eb0a372fff7 to before 6a30a59e2660afd03c975f1b8eae6a2301161197` (git)
  - Other versions: unaffected
- Vendor: Linux. Product: Linux.
  - affected: `6.8`
  - unaffected: `before 6.8` (semver)
  - unaffected: `6.12.110 to 6.12.*, inclusive` (semver)
  - unaffected: `6.18.51 to 6.18.*, inclusive` (semver)
  - unaffected: `7.2.5 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:** 0.0020, the 9th 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 16 Sept 2026. New records show when each source confirmed them.

## Sources

- [CVE List: CVE-2026-89950](https://www.cve.org/CVERecord?id=CVE-2026-89950)
- [NVD: CVE-2026-89950](https://nvd.nist.gov/vuln/detail/CVE-2026-89950)

### References from the CNA

- <https://git.kernel.org/stable/c/a9603e0a7cb5e0cddc6b23af153cf7daafc5c55e>
- <https://git.kernel.org/stable/c/c32e5e25c41201c8c3b796a4ab2c45103187091e>
- <https://git.kernel.org/stable/c/2879177539e3ece483a8e5406970373698e9a6c5>
- <https://git.kernel.org/stable/c/6a30a59e2660afd03c975f1b8eae6a2301161197>

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-2026-89950>
- Everything that needs attention now: <https://agentprime.io/advisories/critical.md>

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The web page: <https://agentprime.io/advisories/CVE-2026-89950/>. Everything for agents: <https://agentprime.io/llms.txt>.