# platform/x86: ISST: Validate socket ID in clos_assoc ioctl

CVE record · `CVE-2026-89442`

- **Identifiers:** `CVE-2026-89442`
- **State:** Confirmed
- **Severity:** CVSS 7.8 High
- **Critical:** No
- **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.

## Affected products, as the CNA wrote them

- Vendor: Linux. Product: Linux.
  - affected: `12a7d2cb811dd8a884dea088a2701fcb8d00136e to before c847ea4851ecfa3462cc711ded2c3c3dd8d08ab8` (git)
  - affected: `12a7d2cb811dd8a884dea088a2701fcb8d00136e to before 0d90ab5f80e19cddfeb0c9fab47a1f34aa932075` (git)
  - affected: `12a7d2cb811dd8a884dea088a2701fcb8d00136e to before 82e707eff9e3b7ef6d96ecc23ea8876d20c7d6ca` (git)
  - affected: `12a7d2cb811dd8a884dea088a2701fcb8d00136e to before 207b4dc6eb100141b122b2602504a1429a4b6558` (git)
  - affected: `12a7d2cb811dd8a884dea088a2701fcb8d00136e to before a89f07db0cb95c54dac4a8406c79a04e44a73c3c` (git)
  - Other versions: unaffected
- Vendor: Linux. Product: Linux.
  - affected: `6.4`
  - unaffected: `before 6.4` (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

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

- **CISA KEV:** Not listed.
- **EPSS:** 0.0017, the 6th 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-2026-89442](https://www.cve.org/CVERecord?id=CVE-2026-89442)
- [NVD: CVE-2026-89442](https://nvd.nist.gov/vuln/detail/CVE-2026-89442)

### References from the CNA

- <https://git.kernel.org/stable/c/c847ea4851ecfa3462cc711ded2c3c3dd8d08ab8>
- <https://git.kernel.org/stable/c/0d90ab5f80e19cddfeb0c9fab47a1f34aa932075>
- <https://git.kernel.org/stable/c/82e707eff9e3b7ef6d96ecc23ea8876d20c7d6ca>
- <https://git.kernel.org/stable/c/207b4dc6eb100141b122b2602504a1429a4b6558>
- <https://git.kernel.org/stable/c/a89f07db0cb95c54dac4a8406c79a04e44a73c3c>

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-2026-89442>
- Everything that needs attention now: <https://agentprime.io/advisories/critical.md>

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The web page: <https://agentprime.io/advisories/CVE-2026-89442/>. Everything for agents: <https://agentprime.io/llms.txt>.