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Review reviewHigh

CVE-2026-23111

Linux Linux, Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 10.0 Extended Update Support

In the Linux kernel, the following vulnerability has been resolved: netfilter: nf_tables: fix inverted genmask check in nft_map_catchall_activate() nft_map_catchall_activate() has an inverted element activity check compared to its non-catchall counterpart nft_mapelem_activate() and compared to what is logically required. nft_map_catchall_activate() is called from the abort path to re-activate catchall map elements that were deactivated during a failed transaction. It should skip elements that are already active (they don't need re-activation) and process elements that are inactive (they nee...

CVSS
7.8
EPSS
0.48%
39.0% percentile
CISA KEV
Not listed
Published
2026.02.13
PRIORITY ASSESSMENT

Review review

The CVSS severity warrants an early asset and exposure review.

Known exploitationNot established by KEV
Exploit probability0.48%
Technical severityCVSS 7.8

Vulnerability overview

In the Linux kernel, the following vulnerability has been resolved: netfilter: nf_tables: fix inverted genmask check in nft_map_catchall_activate() nft_map_catchall_activate() has an inverted element activity check compared to its non-catchall counterpart nft_mapelem_activate() and compared to what is logically required. nft_map_catchall_activate() is called from the abort path to re-activate catchall map elements that were deactivated during a failed transaction. It should skip elements that are already active (they don't need re-activation) and process elements that are inactive (they nee...

Affected product and versions

Product
Linux Linux, Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 10.0 Extended Update Support
Affected versions
>= 25aa2ad37c2162be1c0bc4fe6397f7e4c13f00f8 < 8c760ba4e36c750379d13569f23f5a6e185333f5, >= d60be2da67d172aecf866302c91ea11533eca4d9 < b9b6573421de51829f7ec1cce76d85f5f6fbbd7f, >= 628bd3e49cba1c066228e23d71a852c23e26da73 < 42c574c1504aa089a0a142e4c13859327570473d, >= 628bd3e49cba1c066228e23d71a852c23e26da73 < 1444ff890b4653add12f734ffeffc173d42862dd, >= 628bd3e49cba1c066228e23d71a852c23e26da73 < 8b68a45f9722f2babe9e7bad00aa74638addf081, >= 628bd3e49cba1c066228e23d71a852c23e26da73 < f41c5d151078c5348271ffaf8e7410d96f2d82f8, >= bc9f791d2593f17e39f87c6e2b3a36549a3705b1, >= 3c7ec098e3b588434a8b07ea9b5b36f04cef1f50, >= a136b7942ad2a50de708f76ea299ccb45ac7a7f9, >= dc7cdf8cbcbf8b13de1df93f356ec04cdeef5c41, >= 5.15.121 < 5.15.200, >= 6.1.36 < 6.1.163, >= 4.19.316 < 4.20, >= 5.4.262 < 5.5, >= 5.10.188 < 5.11, >= 6.3.10 < 6.4, >= 6.4, < V4.0, >= V3.1.6, >= V3.1.5
Fixed versions
4.20, 5.5, 5.11, 5.15.200, 6.1.163, 6.4, 6.6.124, 6.12.70, 6.18.10

Recommended response sequence

Confirm exposure before applying a vendor-supported change.

Full remediation guide
  1. 1
    Identify

    Confirm that Linux Linux, Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 10.0 Extended Update Support and an affected version are present.

  2. 2
    Prioritize

    Combine exploitation signals with asset exposure and business criticality.

  3. 3
    Remediate

    Follow the vendor advisory or supported update path and preserve rollback options.

  4. 4
    Verify

    Recheck the version, service health, access paths, and relevant logs.

Technical data

CVSS vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CWE
CWE-416, CWE-672