# netfilter: cttimeout: prevent UAF during module unload

CVE record · `CVE-2026-97609`

- **Identifiers:** `CVE-2026-97609`
- **State:** Confirmed
- **Severity:** CVSS 7.0 High
- **Critical:** No
- **CNA:** Linux
- **Technologies:** [Linux kernel](https://agentprime.io/advisories/technology/linux-kernel.md)
- **Published:** 25 Sept 2026
- **Updated:** 30 Oct 2026
- **Reviewed by a person:** No

Published by the CVE Program (CNA: Linux) at 25 Sept 2026, 10:22 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: `ebfbe67568a734a449203097b02c4ab884257535 to before 763787e9d43982d1082b59caeabd317343b153ea` (git)
  - affected: `ebfbe67568a734a449203097b02c4ab884257535 to before f664e06699829a31e95675a6864655a6c5f9904f` (git)
  - affected: `ebfbe67568a734a449203097b02c4ab884257535 to before 73f353bec62509c776184e49a031c6145cec0d05` (git)
  - affected: `ebfbe67568a734a449203097b02c4ab884257535 to before a7fdd86c386b7f7cc72a126389c2cdb55d035221` (git)
  - affected: `ebfbe67568a734a449203097b02c4ab884257535 to before 1f69c570a73f2dedf75ea5166d47622d5fa958c1` (git)
  - affected: `ebfbe67568a734a449203097b02c4ab884257535 to before fec9b1de0d02de8dafa3cc344bcb91cf28660643` (git)
  - Other versions: unaffected
- Vendor: Linux. Product: Linux.
  - affected: `5.13`
  - unaffected: `before 5.13` (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: `6.18.53 to 6.18.*, inclusive` (semver)
  - unaffected: `7.2.7 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

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

- **CISA KEV:** Not listed.
- **EPSS:** 0.0014, the 3rd percentile, on 12 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 25 Sept 2026. New records show when each source confirmed them.

## Sources

- [CVE List: CVE-2026-97609](https://www.cve.org/CVERecord?id=CVE-2026-97609)
- [NVD: CVE-2026-97609](https://nvd.nist.gov/vuln/detail/CVE-2026-97609)

### References from the CNA

- <https://git.kernel.org/stable/c/763787e9d43982d1082b59caeabd317343b153ea>
- <https://git.kernel.org/stable/c/f664e06699829a31e95675a6864655a6c5f9904f>
- <https://git.kernel.org/stable/c/73f353bec62509c776184e49a031c6145cec0d05>
- <https://git.kernel.org/stable/c/a7fdd86c386b7f7cc72a126389c2cdb55d035221>
- <https://git.kernel.org/stable/c/1f69c570a73f2dedf75ea5166d47622d5fa958c1>
- <https://git.kernel.org/stable/c/fec9b1de0d02de8dafa3cc344bcb91cf28660643>

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-2026-97609>
- Everything that needs attention now: <https://agentprime.io/advisories/critical.md>

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The web page: <https://agentprime.io/advisories/CVE-2026-97609/>. Everything for agents: <https://agentprime.io/llms.txt>.