# llc: fix skb UAF and leaks on llc_mac_hdr_init() failure

CVE record · `CVE-2026-98555`

- **Identifiers:** `CVE-2026-98555`
- **State:** Confirmed
- **Severity:** CVSS 7.5 High
- **Critical:** No
- **CNA:** Linux
- **Technologies:** [Linux kernel](https://agentprime.io/advisories/technology/linux-kernel.md)
- **Published:** 18 Oct 2026
- **Updated:** 24 Oct 2026
- **Reviewed by a person:** No

Published by the CVE Program (CNA: Linux) at 18 Oct 2026, 15:18 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: `1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to before fec0fe6838a7f45175667701fb51abb23a6ffb1e` (git)
  - affected: `1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to before b859ba18b5a1067f71db5618c6a4a70d55fa308b` (git)
  - affected: `1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to before 8b855b645841b5a04e20339a22bb6d593c9b790d` (git)
  - affected: `1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to before d360b31f1a3666579422872aa7d1a751e20b76f9` (git)
  - affected: `1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to before 060f827aa3dc47939ee306da715cd6700d129616` (git)
  - affected: `1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to before 41dcae82bece9f106b4dff0ee777bba8d157c8a8` (git)
  - affected: `1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to before cb3528ad8bb46fa6252f5d14ced7febddc18515d` (git)
  - affected: `1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to before 72f9dd522f8d6c5a00be9695c7bb74631eb5069e` (git)
  - Other versions: unaffected
- Vendor: Linux. Product: Linux.
  - affected: `2.6.12`
  - unaffected: `before 2.6.12` (semver)
  - unaffected: `5.10.271 to 5.10.*, inclusive` (semver)
  - unaffected: `5.15.222 to 5.15.*, inclusive` (semver)
  - unaffected: `6.1.189 to 6.1.*, inclusive` (semver)
  - unaffected: `6.6.158 to 6.6.*, inclusive` (semver)
  - unaffected: `6.12.112 to 6.12.*, inclusive` (semver)
  - unaffected: `6.18.55 to 6.18.*, inclusive` (semver)
  - unaffected: `7.2.9 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

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

- **CISA KEV:** Not listed.
- **EPSS:** 0.0031, the 23rd percentile, on 8 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 18 Oct 2026. New records show when each source confirmed them.

## Sources

- [CVE List: CVE-2026-98555](https://www.cve.org/CVERecord?id=CVE-2026-98555)
- [NVD: CVE-2026-98555](https://nvd.nist.gov/vuln/detail/CVE-2026-98555)

### References from the CNA

- <https://git.kernel.org/stable/c/fec0fe6838a7f45175667701fb51abb23a6ffb1e>
- <https://git.kernel.org/stable/c/b859ba18b5a1067f71db5618c6a4a70d55fa308b>
- <https://git.kernel.org/stable/c/8b855b645841b5a04e20339a22bb6d593c9b790d>
- <https://git.kernel.org/stable/c/d360b31f1a3666579422872aa7d1a751e20b76f9>
- <https://git.kernel.org/stable/c/060f827aa3dc47939ee306da715cd6700d129616>
- <https://git.kernel.org/stable/c/41dcae82bece9f106b4dff0ee777bba8d157c8a8>
- <https://git.kernel.org/stable/c/cb3528ad8bb46fa6252f5d14ced7febddc18515d>
- <https://git.kernel.org/stable/c/72f9dd522f8d6c5a00be9695c7bb74631eb5069e>

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-2026-98555>
- Everything that needs attention now: <https://agentprime.io/advisories/critical.md>

---

The web page: <https://agentprime.io/advisories/CVE-2026-98555/>. Everything for agents: <https://agentprime.io/llms.txt>.