# sctp: stop processing a packet once its association is deleted

CVE record · `CVE-2026-89479`

- **Identifiers:** `CVE-2026-89479`
- **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, 19:43 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: `1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to before 7d970353eeb98f46a3b9dc602850e4f6336a9889` (git)
  - affected: `1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to before 09c3b193a3e8fe53e1f416e2f8e3283d2a785405` (git)
  - affected: `1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to before ed85fe91a61bc0e0da6b585c07102b20f4cc65a0` (git)
  - affected: `1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to before 5c0b2dbbdafc9eeeb11fffe1e46551fc3b55d8ee` (git)
  - affected: `1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to before ee3f04cf566f6041aa9a0360494fd8db5ade383a` (git)
  - affected: `1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to before fa306a40e716c5abcd967475459ce1ebd56e5115` (git)
  - affected: `1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to before a713e1b3a265f180ad25a08e17be15d67a2f7149` (git)
  - affected: `1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to before 47e15a8d12e366d0d261bcbc394394f44418938d` (git)
  - Other versions: unaffected
- Vendor: Linux. Product: Linux.
  - affected: `2.6.12`
  - unaffected: `before 2.6.12` (semver)
  - unaffected: `5.10.270 to 5.10.*, inclusive` (semver)
  - unaffected: `5.15.221 to 5.15.*, inclusive` (semver)
  - unaffected: `6.1.188 to 6.1.*, inclusive` (semver)
  - unaffected: `6.6.157 to 6.6.*, inclusive` (semver)
  - unaffected: `6.12.109 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:** 0.0050, the 43rd 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-2026-89479](https://www.cve.org/CVERecord?id=CVE-2026-89479)
- [NVD: CVE-2026-89479](https://nvd.nist.gov/vuln/detail/CVE-2026-89479)

### References from the CNA

- <https://git.kernel.org/stable/c/7d970353eeb98f46a3b9dc602850e4f6336a9889>
- <https://git.kernel.org/stable/c/09c3b193a3e8fe53e1f416e2f8e3283d2a785405>
- <https://git.kernel.org/stable/c/ed85fe91a61bc0e0da6b585c07102b20f4cc65a0>
- <https://git.kernel.org/stable/c/5c0b2dbbdafc9eeeb11fffe1e46551fc3b55d8ee>
- <https://git.kernel.org/stable/c/ee3f04cf566f6041aa9a0360494fd8db5ade383a>
- <https://git.kernel.org/stable/c/fa306a40e716c5abcd967475459ce1ebd56e5115>
- <https://git.kernel.org/stable/c/a713e1b3a265f180ad25a08e17be15d67a2f7149>
- <https://git.kernel.org/stable/c/47e15a8d12e366d0d261bcbc394394f44418938d>

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-2026-89479>
- Everything that needs attention now: <https://agentprime.io/advisories/critical.md>

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The web page: <https://agentprime.io/advisories/CVE-2026-89479/>. Everything for agents: <https://agentprime.io/llms.txt>.