# netfilter: nfnetlink_log: wait for rcu grace period before freeing pernet state

CVE record · `CVE-2026-93288`

- **Identifiers:** `CVE-2026-93288`
- **State:** Confirmed
- **Severity:** CVSS 7.8 High
- **Critical:** No
- **CNA:** Linux
- **Technologies:** [Linux kernel](https://agentprime.io/advisories/technology/linux-kernel.md)
- **Published:** 24 Sept 2026
- **Updated:** 3 Oct 2026
- **Reviewed by a person:** No

Published by the CVE Program (CNA: Linux) at 24 Sept 2026, 16:02 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: `c83fa19603bdaeef17b815713dbbe3230c8a34ee to before ba2e246aa294f9acd86194ea87fb6834ed0a37ac` (git)
  - affected: `c83fa19603bdaeef17b815713dbbe3230c8a34ee to before 5570d6c8b320dbcc602617ee08c27ce752fed65a` (git)
  - affected: `c83fa19603bdaeef17b815713dbbe3230c8a34ee to before 3b9aa62d78ce80de47af2db472ff452398755213` (git)
  - affected: `c83fa19603bdaeef17b815713dbbe3230c8a34ee to before f4461654374576e9d5d0245fd534c46ad8509051` (git)
  - affected: `c83fa19603bdaeef17b815713dbbe3230c8a34ee to before dc20050b6b12ca58066715d088e1a537535d938d` (git)
  - affected: `c83fa19603bdaeef17b815713dbbe3230c8a34ee to before 33d1469b0124cc0baaea7a2032123b77a81e0940` (git)
  - Other versions: unaffected
- Vendor: Linux. Product: Linux.
  - affected: `4.12`
  - unaffected: `before 4.12` (semver)
  - unaffected: `5.15.222 to 5.15.*, inclusive` (semver)
  - unaffected: `6.1.189 to 6.1.*, inclusive` (semver)
  - unaffected: `6.6.158 to 6.6.*, inclusive` (semver)
  - unaffected: `6.12.111 to 6.12.*, inclusive` (semver)
  - unaffected: `6.18.53 to 6.18.*, 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:** 0.0013, the 2nd percentile, on 13 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 24 Sept 2026. New records show when each source confirmed them.

## Sources

- [CVE List: CVE-2026-93288](https://www.cve.org/CVERecord?id=CVE-2026-93288)
- [NVD: CVE-2026-93288](https://nvd.nist.gov/vuln/detail/CVE-2026-93288)

### References from the CNA

- <https://git.kernel.org/stable/c/ba2e246aa294f9acd86194ea87fb6834ed0a37ac>
- <https://git.kernel.org/stable/c/5570d6c8b320dbcc602617ee08c27ce752fed65a>
- <https://git.kernel.org/stable/c/3b9aa62d78ce80de47af2db472ff452398755213>
- <https://git.kernel.org/stable/c/f4461654374576e9d5d0245fd534c46ad8509051>
- <https://git.kernel.org/stable/c/dc20050b6b12ca58066715d088e1a537535d938d>
- <https://git.kernel.org/stable/c/33d1469b0124cc0baaea7a2032123b77a81e0940>

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-2026-93288>
- Everything that needs attention now: <https://agentprime.io/advisories/critical.md>

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The web page: <https://agentprime.io/advisories/CVE-2026-93288/>. Everything for agents: <https://agentprime.io/llms.txt>.