# coredump: hold RCU while releasing parked threads

CVE record · `CVE-2026-99218`

- **Identifiers:** `CVE-2026-99218`
- **State:** Confirmed
- **Severity:** CVSS 7.0 High
- **Critical:** No
- **CNA:** Linux
- **Technologies:** [Linux kernel](https://agentprime.io/advisories/technology/linux-kernel.md)
- **Published:** 2 Nov 2026
- **Updated:** 3 Nov 2026
- **Reviewed by a person:** No

Published by the CVE Program (CNA: Linux) at 2 Nov 2026, 16:06 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: `a94e2d408eaedbd85aae259621d46fafc10479a2 to before fd0fbe84312fda2fc187428c92c50b7d03a9d24c` (git)
  - affected: `a94e2d408eaedbd85aae259621d46fafc10479a2 to before 71146c437bae59e5280f657965dc6d006ee3989b` (git)
  - affected: `a94e2d408eaedbd85aae259621d46fafc10479a2 to before 0fce73efee40c65ce26641c5d93942462f9e8307` (git)
  - affected: `a94e2d408eaedbd85aae259621d46fafc10479a2 to before 16e94ed90b1b02398e044d41fd1db34828daa08e` (git)
  - affected: `a94e2d408eaedbd85aae259621d46fafc10479a2 to before a0f09ff4c6b93312e565cfe75d76c3a551a3ec4c` (git)
  - affected: `a94e2d408eaedbd85aae259621d46fafc10479a2 to before b0eca0edddf4c1dbaf6d1f6a8636b4235f5bc573` (git)
  - affected: `a94e2d408eaedbd85aae259621d46fafc10479a2 to before 61d58591aa0188bf2463e263962256316ff8b576` (git)
  - Other versions: unaffected
- Vendor: Linux. Product: Linux.
  - affected: `2.6.27`
  - unaffected: `before 2.6.27` (semver)
  - unaffected: `6.1.191 to 6.1.*, inclusive` (semver)
  - unaffected: `6.6.161 to 6.6.*, inclusive` (semver)
  - unaffected: `6.12.115 to 6.12.*, inclusive` (semver)
  - unaffected: `6.18.60 to 6.18.*, inclusive` (semver)
  - unaffected: `7.2.14 to 7.2.*, inclusive` (semver)
  - unaffected: `7.3.1 to 7.3.*, inclusive` (semver)
  - unaffected: `7.4-rc1 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:** 0.0012, the 2nd percentile, on 5 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

## Timeline

- 2 Nov 2026, 16:06 UTC: [Confirmed by the CVE List](https://www.cve.org/CVERecord?id=CVE-2026-99218)
- 2 Nov 2026, 16:12 UTC: First seen by agentprime
- 2 Nov 2026, 16:17 UTC: [Confirmed by NVD](https://nvd.nist.gov/vuln/detail/CVE-2026-99218)

## Sources

- [CVE List: CVE-2026-99218](https://www.cve.org/CVERecord?id=CVE-2026-99218)
- [NVD: CVE-2026-99218](https://nvd.nist.gov/vuln/detail/CVE-2026-99218)

### References from the CNA

- <https://git.kernel.org/stable/c/fd0fbe84312fda2fc187428c92c50b7d03a9d24c>
- <https://git.kernel.org/stable/c/71146c437bae59e5280f657965dc6d006ee3989b>
- <https://git.kernel.org/stable/c/0fce73efee40c65ce26641c5d93942462f9e8307>
- <https://git.kernel.org/stable/c/16e94ed90b1b02398e044d41fd1db34828daa08e>
- <https://git.kernel.org/stable/c/a0f09ff4c6b93312e565cfe75d76c3a551a3ec4c>
- <https://git.kernel.org/stable/c/b0eca0edddf4c1dbaf6d1f6a8636b4235f5bc573>
- <https://git.kernel.org/stable/c/61d58591aa0188bf2463e263962256316ff8b576>

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-2026-99218>
- Everything that needs attention now: <https://agentprime.io/advisories/critical.md>

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The web page: <https://agentprime.io/advisories/CVE-2026-99218/>. Everything for agents: <https://agentprime.io/llms.txt>.