# net/smc: fix use-after-free of the LLC qentry in smc_llc_srv_add_link()

CVE record · `CVE-2026-80981`

- **Identifiers:** `CVE-2026-80981`
- **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:** 11 Sept 2026
- **Updated:** 19 Oct 2026
- **Reviewed by a person:** No

Published by the CVE Program (CNA: Linux) at 11 Sept 2026, 19:42 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: `27ef6a9981fe74191849966a6d5e0400a4008ab8 to before c52a998a223e7e84333306996edec096178d1e95` (git)
  - affected: `27ef6a9981fe74191849966a6d5e0400a4008ab8 to before adef84cc85d449ac28d2b4b4c49cf19619c56e27` (git)
  - affected: `27ef6a9981fe74191849966a6d5e0400a4008ab8 to before a42a459ef0e54cb0c4b3e43e21cb0e658e664f64` (git)
  - Other versions: unaffected
- Vendor: Linux. Product: Linux.
  - affected: `6.14`
  - unaffected: `before 6.14` (semver)
  - unaffected: `6.18.50 to 6.18.*, inclusive` (semver)
  - unaffected: `7.2.4 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

- 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:** 0.0060, the 49th 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 11 Sept 2026. New records show when each source confirmed them.

## Sources

- [CVE List: CVE-2026-80981](https://www.cve.org/CVERecord?id=CVE-2026-80981)
- [NVD: CVE-2026-80981](https://nvd.nist.gov/vuln/detail/CVE-2026-80981)

### References from the CNA

- <https://git.kernel.org/stable/c/c52a998a223e7e84333306996edec096178d1e95>
- <https://git.kernel.org/stable/c/adef84cc85d449ac28d2b4b4c49cf19619c56e27>
- <https://git.kernel.org/stable/c/a42a459ef0e54cb0c4b3e43e21cb0e658e664f64>

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-2026-80981>
- Everything that needs attention now: <https://agentprime.io/advisories/critical.md>

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The web page: <https://agentprime.io/advisories/CVE-2026-80981/>. Everything for agents: <https://agentprime.io/llms.txt>.