# sctp: clear control chunk transport if it is being removed

CVE record · `CVE-2026-74688`

- **Identifiers:** `CVE-2026-74688`
- **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:** 22 Aug 2026
- **Updated:** 16 Oct 2026
- **Reviewed by a person:** No

Published by the CVE Program (CNA: Linux) at 22 Aug 2026, 15:32 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.

## 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: `8a07eb0a50aebc8c95478d49c28c7f8419a26cef to before dbb3f418a8665ffb0514e1a9520ab6a1c5d4d886` (git)
  - affected: `8a07eb0a50aebc8c95478d49c28c7f8419a26cef to before fad4766a74220fe579c6fcaa10ba01c23529814f` (git)
  - affected: `8a07eb0a50aebc8c95478d49c28c7f8419a26cef to before 936658ec41c28c397ef390140e02d4c91ade92f0` (git)
  - affected: `8a07eb0a50aebc8c95478d49c28c7f8419a26cef to before 8de65194a04d2552cd39b6c67d942d490f22d174` (git)
  - affected: `8a07eb0a50aebc8c95478d49c28c7f8419a26cef to before 6160e756db81d6cb63e3e2952efcf6c5134be385` (git)
  - affected: `8a07eb0a50aebc8c95478d49c28c7f8419a26cef to before 18d704bdd809377dfd81a3c2f42426763b5da227` (git)
  - affected: `8a07eb0a50aebc8c95478d49c28c7f8419a26cef to before 4d6b9cac6df5e0cfef1a66b3edd7aebdb9e4b7e7` (git)
  - affected: `8a07eb0a50aebc8c95478d49c28c7f8419a26cef to before c9158ceaf27780ef64534ad72f44ffde3f8ccc49` (git)
  - Other versions: unaffected
- Vendor: Linux. Product: Linux.
  - affected: `3.1`
  - unaffected: `before 3.1` (semver)
  - unaffected: `5.10.265 to 5.10.*, inclusive` (semver)
  - unaffected: `5.15.216 to 5.15.*, inclusive` (semver)
  - unaffected: `6.1.183 to 6.1.*, inclusive` (semver)
  - unaffected: `6.6.152 to 6.6.*, inclusive` (semver)
  - unaffected: `6.12.104 to 6.12.*, inclusive` (semver)
  - unaffected: `6.18.45 to 6.18.*, inclusive` (semver)
  - unaffected: `7.1.9 to 7.1.*, inclusive` (semver)
  - unaffected: `7.2 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:** 0.0050, the 43rd percentile, on 15 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 22 Aug 2026. New records show when each source confirmed them.

## Sources

- [CVE List: CVE-2026-74688](https://www.cve.org/CVERecord?id=CVE-2026-74688)
- [NVD: CVE-2026-74688](https://nvd.nist.gov/vuln/detail/CVE-2026-74688)

### References from the CNA

- <https://git.kernel.org/stable/c/dbb3f418a8665ffb0514e1a9520ab6a1c5d4d886>
- <https://git.kernel.org/stable/c/fad4766a74220fe579c6fcaa10ba01c23529814f>
- <https://git.kernel.org/stable/c/936658ec41c28c397ef390140e02d4c91ade92f0>
- <https://git.kernel.org/stable/c/8de65194a04d2552cd39b6c67d942d490f22d174>
- <https://git.kernel.org/stable/c/6160e756db81d6cb63e3e2952efcf6c5134be385>
- <https://git.kernel.org/stable/c/18d704bdd809377dfd81a3c2f42426763b5da227>
- <https://git.kernel.org/stable/c/4d6b9cac6df5e0cfef1a66b3edd7aebdb9e4b7e7>
- <https://git.kernel.org/stable/c/c9158ceaf27780ef64534ad72f44ffde3f8ccc49>

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-2026-74688>
- Everything that needs attention now: <https://agentprime.io/advisories/critical.md>

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The web page: <https://agentprime.io/advisories/CVE-2026-74688/>. Everything for agents: <https://agentprime.io/llms.txt>.