# net/x25: fix use-after-free of the socket by its timers

CVE record · `CVE-2026-74628`

- **Identifiers:** `CVE-2026-74628`
- **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:** 27 Aug 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: `1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to before ba925a2e98ce967a0e71c5bcbcf5dbd3facaf0c8` (git)
  - affected: `1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to before 6b79659590f0f82a9b8efd2ffd55ec6399ebfc33` (git)
  - affected: `1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to before fdd9ac50b9b61ef2b2d52c5156aff788be91454d` (git)
  - affected: `1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to before 1fc9f6d2c7c9fdb341bfe8ca449c990632299ea6` (git)
  - affected: `1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to before 3c4919be5d910db4beebca420953858606fba7d8` (git)
  - affected: `1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to before 4bc522b33438fefc3272840ae5988771863a4f1f` (git)
  - affected: `1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to before e92c7e2b41d1528a830bc64c5e4e46dfa8133dda` (git)
  - affected: `1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to before 2195424c3da2ef1829a63b807e3a900a90e57d85` (git)
  - Other versions: unaffected
- Vendor: Linux. Product: Linux.
  - affected: `2.6.12`
  - unaffected: `before 2.6.12` (semver)
  - unaffected: `5.10.267 to 5.10.*, inclusive` (semver)
  - unaffected: `5.15.217 to 5.15.*, inclusive` (semver)
  - unaffected: `6.1.184 to 6.1.*, inclusive` (semver)
  - unaffected: `6.6.153 to 6.6.*, inclusive` (semver)
  - unaffected: `6.12.105 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-2026-74628](https://www.cve.org/CVERecord?id=CVE-2026-74628)
- [NVD: CVE-2026-74628](https://nvd.nist.gov/vuln/detail/CVE-2026-74628)

### References from the CNA

- <https://git.kernel.org/stable/c/ba925a2e98ce967a0e71c5bcbcf5dbd3facaf0c8>
- <https://git.kernel.org/stable/c/6b79659590f0f82a9b8efd2ffd55ec6399ebfc33>
- <https://git.kernel.org/stable/c/fdd9ac50b9b61ef2b2d52c5156aff788be91454d>
- <https://git.kernel.org/stable/c/1fc9f6d2c7c9fdb341bfe8ca449c990632299ea6>
- <https://git.kernel.org/stable/c/3c4919be5d910db4beebca420953858606fba7d8>
- <https://git.kernel.org/stable/c/4bc522b33438fefc3272840ae5988771863a4f1f>
- <https://git.kernel.org/stable/c/e92c7e2b41d1528a830bc64c5e4e46dfa8133dda>
- <https://git.kernel.org/stable/c/2195424c3da2ef1829a63b807e3a900a90e57d85>

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-2026-74628>
- Everything that needs attention now: <https://agentprime.io/advisories/critical.md>

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The web page: <https://agentprime.io/advisories/CVE-2026-74628/>. Everything for agents: <https://agentprime.io/llms.txt>.