# netfilter: ipset: mark the rcu locked areas properly

CVE record · `CVE-2026-98899`

- **Identifiers:** `CVE-2026-98899`
- **State:** Confirmed
- **Severity:** CVSS 7.8 High
- **Critical:** No
- **CNA:** Linux
- **Technologies:** [Linux kernel](https://agentprime.io/advisories/technology/linux-kernel.md)
- **Published:** 23 Oct 2026
- **Updated:** 26 Oct 2026
- **Reviewed by a person:** No

Published by the CVE Program (CNA: Linux) at 23 Oct 2026, 11:54 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: `f66ee0410b1c3481ee75e5db9b34547b4d582465 to before 67bd3d2350d17c2f4fb158c3f917c10b15ecbc94` (git)
  - affected: `f66ee0410b1c3481ee75e5db9b34547b4d582465 to before 892399abd1a005a455d5b74d86d82b9773405f2b` (git)
  - affected: `f66ee0410b1c3481ee75e5db9b34547b4d582465 to before eee5172741b2c0e73210020732043e5d589295d3` (git)
  - affected: `f66ee0410b1c3481ee75e5db9b34547b4d582465 to before ecb48c6b9edc78de8dd456c365727ae14b88c1ee` (git)
  - affected: `f66ee0410b1c3481ee75e5db9b34547b4d582465 to before 0c46c9ce24130657ec7460c27fba5d445f5abd06` (git)
  - affected: `f66ee0410b1c3481ee75e5db9b34547b4d582465 to before ca9fab1ca15534cef1630e81a479e94b3bbcdb6a` (git)
  - affected: `f66ee0410b1c3481ee75e5db9b34547b4d582465 to before 5d0c22e73656d050daffad10a2ba8765ce8441c8` (git)
  - affected: `5dd9488ae41070b69d2f4acb580f77db5705f9ca` (git)
  - affected: `a469bab3386aebff33c59506f3a95e35b91118fd` (git)
  - affected: `5.4.24 to before 5.5` (semver)
  - affected: `5.5.8 to before 5.6` (semver)
  - Other versions: unaffected
- Vendor: Linux. Product: Linux.
  - affected: `5.6`
  - unaffected: `before 5.6` (semver)
  - unaffected: `5.10.271 to 5.10.*, inclusive` (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:** 0.0017, the 6th percentile, on 7 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 23 Oct 2026. New records show when each source confirmed them.

## Sources

- [CVE List: CVE-2026-98899](https://www.cve.org/CVERecord?id=CVE-2026-98899)
- [NVD: CVE-2026-98899](https://nvd.nist.gov/vuln/detail/CVE-2026-98899)

### References from the CNA

- <https://git.kernel.org/stable/c/67bd3d2350d17c2f4fb158c3f917c10b15ecbc94>
- <https://git.kernel.org/stable/c/892399abd1a005a455d5b74d86d82b9773405f2b>
- <https://git.kernel.org/stable/c/eee5172741b2c0e73210020732043e5d589295d3>
- <https://git.kernel.org/stable/c/ecb48c6b9edc78de8dd456c365727ae14b88c1ee>
- <https://git.kernel.org/stable/c/0c46c9ce24130657ec7460c27fba5d445f5abd06>
- <https://git.kernel.org/stable/c/ca9fab1ca15534cef1630e81a479e94b3bbcdb6a>
- <https://git.kernel.org/stable/c/5d0c22e73656d050daffad10a2ba8765ce8441c8>

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-2026-98899>
- Everything that needs attention now: <https://agentprime.io/advisories/critical.md>

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The web page: <https://agentprime.io/advisories/CVE-2026-98899/>. Everything for agents: <https://agentprime.io/llms.txt>.