# net/smc: stop killed, freed and out_of_sync sharing a byte

CVE record · `CVE-2026-80980`

- **Identifiers:** `CVE-2026-80980`
- **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:** 30 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: `b286a0651e4404ab96cdfdcdad8a839a26b3751e to before a6efc0f4dbdba6595d89cdaf2d8f26f68be16f0b` (git)
  - affected: `b286a0651e4404ab96cdfdcdad8a839a26b3751e to before 297e96f38d3e4f1a3b84068950dd5c7a55bbdc7b` (git)
  - affected: `b286a0651e4404ab96cdfdcdad8a839a26b3751e to before 09a9cbadc05f452405de31012bd2c428b601291a` (git)
  - affected: `b286a0651e4404ab96cdfdcdad8a839a26b3751e to before 313f79149eb337411c64e2c247234b62ef9a3cb9` (git)
  - affected: `b286a0651e4404ab96cdfdcdad8a839a26b3751e to before 2cb7a8d64b7e8ccdc69bbe48fe9c4eaa79c33aec` (git)
  - affected: `b286a0651e4404ab96cdfdcdad8a839a26b3751e to before db51a8658c11a82432b64999519a269c3aabb447` (git)
  - Other versions: unaffected
- Vendor: Linux. Product: Linux.
  - affected: `5.8`
  - unaffected: `before 5.8` (semver)
  - unaffected: `6.1.191 to 6.1.*, inclusive` (semver)
  - unaffected: `6.6.160 to 6.6.*, inclusive` (semver)
  - unaffected: `6.12.112 to 6.12.*, inclusive` (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:** 0.0068, the 53rd 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-2026-80980](https://www.cve.org/CVERecord?id=CVE-2026-80980)
- [NVD: CVE-2026-80980](https://nvd.nist.gov/vuln/detail/CVE-2026-80980)

### References from the CNA

- <https://git.kernel.org/stable/c/a6efc0f4dbdba6595d89cdaf2d8f26f68be16f0b>
- <https://git.kernel.org/stable/c/297e96f38d3e4f1a3b84068950dd5c7a55bbdc7b>
- <https://git.kernel.org/stable/c/09a9cbadc05f452405de31012bd2c428b601291a>
- <https://git.kernel.org/stable/c/313f79149eb337411c64e2c247234b62ef9a3cb9>
- <https://git.kernel.org/stable/c/2cb7a8d64b7e8ccdc69bbe48fe9c4eaa79c33aec>
- <https://git.kernel.org/stable/c/db51a8658c11a82432b64999519a269c3aabb447>

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-2026-80980>
- Everything that needs attention now: <https://agentprime.io/advisories/critical.md>

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The web page: <https://agentprime.io/advisories/CVE-2026-80980/>. Everything for agents: <https://agentprime.io/llms.txt>.