# perf/core: Detach event groups during remove_on_exec

CVE record · `CVE-2026-64556`

- **Identifiers:** `CVE-2026-64556`
- **State:** Confirmed
- **Severity:** CVSS 7.8 High
- **Critical:** No
- **CNA:** Linux
- **Weakness (CWE):** [CWE-662](https://cwe.mitre.org/data/definitions/662.html)
- **Tags:** [CWE-662](https://agentprime.io/advisories/tag/cwe-662.md)
- **Technologies:** [Linux kernel](https://agentprime.io/advisories/technology/linux-kernel.md)
- **Published:** 29 Jul 2026
- **Updated:** 30 Oct 2026
- **Reviewed by a person:** No

Published by the CVE Program (CNA: Linux) at 29 Jul 2026, 08:01 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: `2e498d0a74e5b88a6689ae1b811f247f91ff188e to before 1d3e1102273f09180262496658e7eeed8a5a7b59` (git)
  - affected: `2e498d0a74e5b88a6689ae1b811f247f91ff188e to before 4cdb1b3ab96eb1b7eb70bc5c82fede334bd60df2` (git)
  - affected: `2e498d0a74e5b88a6689ae1b811f247f91ff188e to before 39358e856fb89e62e3c8d7389a2dc4ec33dbe90e` (git)
  - affected: `2e498d0a74e5b88a6689ae1b811f247f91ff188e to before a2d5d3ee7b6e3953114726b1521e62123ab5b043` (git)
  - affected: `2e498d0a74e5b88a6689ae1b811f247f91ff188e to before 06ccef0434e98058ddae7bcebc901f93d22b7653` (git)
  - affected: `2e498d0a74e5b88a6689ae1b811f247f91ff188e to before 037a3c43edfb597665dd34457cd22b14692f2ba3` (git)
  - Other versions: unaffected
- Vendor: Linux. Product: Linux.
  - affected: `5.13`
  - unaffected: `before 5.13` (semver)
  - unaffected: `6.1.191 to 6.1.*, inclusive` (semver)
  - unaffected: `6.6.145 to 6.6.*, inclusive` (semver)
  - unaffected: `6.12.96 to 6.12.*, inclusive` (semver)
  - unaffected: `6.18.39 to 6.18.*, inclusive` (semver)
  - unaffected: `7.1.4 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

- 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:** 0.0016, the 5th percentile, on 6 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

## Timeline

- 29 Jul 2026, 09:16 UTC: [Confirmed by NVD](https://nvd.nist.gov/vuln/detail/CVE-2026-64556)

## Sources

- [CVE List: CVE-2026-64556](https://www.cve.org/CVERecord?id=CVE-2026-64556)
- [NVD: CVE-2026-64556](https://nvd.nist.gov/vuln/detail/CVE-2026-64556)

### References from the CNA

- <https://git.kernel.org/stable/c/1d3e1102273f09180262496658e7eeed8a5a7b59>
- <https://git.kernel.org/stable/c/4cdb1b3ab96eb1b7eb70bc5c82fede334bd60df2>
- <https://git.kernel.org/stable/c/39358e856fb89e62e3c8d7389a2dc4ec33dbe90e>
- <https://git.kernel.org/stable/c/a2d5d3ee7b6e3953114726b1521e62123ab5b043>
- <https://git.kernel.org/stable/c/06ccef0434e98058ddae7bcebc901f93d22b7653>
- <https://git.kernel.org/stable/c/037a3c43edfb597665dd34457cd22b14692f2ba3>

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-2026-64556>
- Everything that needs attention now: <https://agentprime.io/advisories/critical.md>

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The web page: <https://agentprime.io/advisories/CVE-2026-64556/>. Everything for agents: <https://agentprime.io/llms.txt>.