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Review reviewHigh

CVE-2026-23278

Linux Linux, linux kernel

In the Linux kernel, the following vulnerability has been resolved: netfilter: nf_tables: always walk all pending catchall elements During transaction processing we might have more than one catchall element: 1 live catchall element and 1 pending element that is coming as part of the new batch. If the map holding the catchall elements is also going away, its required to toggle all catchall elements and not just the first viable candidate. Otherwise, we get: WARNING: ./include/net/netfilter/nf_tables.h:1281 at nft_data_release+0xb7/0xe0 [nf_tables], CPU#2: nft/1404 RIP: 0010:nft_data_release+...

CVSS
7.8
EPSS
0.17%
6.11% percentile
CISA KEV
Not listed
Published
2026.03.20
PRIORITY ASSESSMENT

Review review

The CVSS severity warrants an early asset and exposure review.

Known exploitationNot established by KEV
Exploit probability0.17%
Technical severityCVSS 7.8

Vulnerability overview

In the Linux kernel, the following vulnerability has been resolved: netfilter: nf_tables: always walk all pending catchall elements During transaction processing we might have more than one catchall element: 1 live catchall element and 1 pending element that is coming as part of the new batch. If the map holding the catchall elements is also going away, its required to toggle all catchall elements and not just the first viable candidate. Otherwise, we get: WARNING: ./include/net/netfilter/nf_tables.h:1281 at nft_data_release+0xb7/0xe0 [nf_tables], CPU#2: nft/1404 RIP: 0010:nft_data_release+...

Affected product and versions

Product
Linux Linux, linux kernel
Affected versions
d60be2da67d172aecf866302c91ea11533eca4d9, 628bd3e49cba1c066228e23d71a852c23e26da73, bc9f791d2593f17e39f87c6e2b3a36549a3705b1, 3c7ec098e3b588434a8b07ea9b5b36f04cef1f50, a136b7942ad2a50de708f76ea299ccb45ac7a7f9, 25aa2ad37c2162be1c0bc4fe6397f7e4c13f00f8, dc7cdf8cbcbf8b13de1df93f356ec04cdeef5c41, 6.1.36, 4.19.316, 5.4.262, 5.10.188, 5.15.121, 6.3.10, 6.4, >= 4.19.316 < 4.20, >= 5.4.262 < 5.5, >= 5.10.188 < 5.11, >= 5.15.121 < 5.16, >= 6.1.36 < 6.2, >= 6.3.10 < 6.4
Fixed versions
4.20, 5.5, 5.11, 5.16, 6.2, 6.4, 6.12.78, 6.18.19, 6.19.9

Recommended response sequence

Confirm exposure before applying a vendor-supported change.

Full remediation guide
  1. 1
    Identify

    Confirm that Linux Linux, linux kernel 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
Not available