# netfilter: nf_tables: fix inverted genmask check in nft_map_catchall_activate()

CVE record · `CVE-2026-23111`

- **Identifiers:** `CVE-2026-23111`
- **State:** Confirmed
- **Severity:** CVSS 7.8 High
- **Critical:** No
- **CNA:** Linux
- **Weakness (CWE):** [CWE-416](https://cwe.mitre.org/data/definitions/416.html) · [CWE-672](https://cwe.mitre.org/data/definitions/672.html)
- **Tags:** [Memory corruption](https://agentprime.io/advisories/tag/memory-corruption.md) · [CWE-672](https://agentprime.io/advisories/tag/cwe-672.md)
- **Technologies:** [Linux kernel](https://agentprime.io/advisories/technology/linux-kernel.md)
- **Published:** 13 Feb 2026
- **Updated:** 15 Oct 2026
- **Reviewed by a person:** No

Published by the CVE Program (CNA: Linux) at 13 Feb 2026, 13:29 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: `25aa2ad37c2162be1c0bc4fe6397f7e4c13f00f8 to before 8c760ba4e36c750379d13569f23f5a6e185333f5` (git)
  - affected: `d60be2da67d172aecf866302c91ea11533eca4d9 to before b9b6573421de51829f7ec1cce76d85f5f6fbbd7f` (git)
  - affected: `628bd3e49cba1c066228e23d71a852c23e26da73 to before 42c574c1504aa089a0a142e4c13859327570473d` (git)
  - affected: `628bd3e49cba1c066228e23d71a852c23e26da73 to before 1444ff890b4653add12f734ffeffc173d42862dd` (git)
  - affected: `628bd3e49cba1c066228e23d71a852c23e26da73 to before 8b68a45f9722f2babe9e7bad00aa74638addf081` (git)
  - affected: `628bd3e49cba1c066228e23d71a852c23e26da73 to before f41c5d151078c5348271ffaf8e7410d96f2d82f8` (git)
  - affected: `bc9f791d2593f17e39f87c6e2b3a36549a3705b1` (git)
  - affected: `3c7ec098e3b588434a8b07ea9b5b36f04cef1f50` (git)
  - affected: `a136b7942ad2a50de708f76ea299ccb45ac7a7f9` (git)
  - affected: `dc7cdf8cbcbf8b13de1df93f356ec04cdeef5c41` (git)
  - affected: `5.15.121 to before 5.15.200` (semver)
  - affected: `6.1.36 to before 6.1.163` (semver)
  - and 4 more
  - Other versions: unaffected
- Vendor: Linux. Product: Linux.
  - affected: `6.4`
  - unaffected: `before 6.4` (semver)
  - unaffected: `5.15.200 to 5.15.*, inclusive` (semver)
  - unaffected: `6.1.163 to 6.1.*, inclusive` (semver)
  - unaffected: `6.6.124 to 6.6.*, inclusive` (semver)
  - unaffected: `6.12.70 to 6.12.*, inclusive` (semver)
  - unaffected: `6.18.10 to 6.18.*, inclusive` (semver)
  - unaffected: `6.19 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) (used for this record)
- 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 ADP (redhat-SADP)

- **CISA KEV:** Not listed.
- **EPSS:** 0.0052, the 44th percentile, on 6 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 13 Feb 2026. New records show when each source confirmed them.

## Sources

- [CVE List: CVE-2026-23111](https://www.cve.org/CVERecord?id=CVE-2026-23111)
- [NVD: CVE-2026-23111](https://nvd.nist.gov/vuln/detail/CVE-2026-23111)

### References from the CNA

- <https://git.kernel.org/stable/c/8c760ba4e36c750379d13569f23f5a6e185333f5>
- <https://git.kernel.org/stable/c/b9b6573421de51829f7ec1cce76d85f5f6fbbd7f>
- <https://git.kernel.org/stable/c/42c574c1504aa089a0a142e4c13859327570473d>
- <https://git.kernel.org/stable/c/1444ff890b4653add12f734ffeffc173d42862dd>
- <https://git.kernel.org/stable/c/8b68a45f9722f2babe9e7bad00aa74638addf081>
- <https://git.kernel.org/stable/c/f41c5d151078c5348271ffaf8e7410d96f2d82f8>

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-2026-23111>
- Everything that needs attention now: <https://agentprime.io/advisories/critical.md>

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The web page: <https://agentprime.io/advisories/CVE-2026-23111/>. Everything for agents: <https://agentprime.io/llms.txt>.