CVE-2026-23278 (GCVE-0-2026-23278)

Vulnerability from cvelistv5 – Published: 2026-03-20 08:08 – Updated: 2026-10-30 12:23
VLAI
Title
netfilter: nf_tables: always walk all pending catchall elements
Summary
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+0xb7/0xe0 [nf_tables] [..] __nft_set_elem_destroy+0x106/0x380 [nf_tables] nf_tables_abort_release+0x348/0x8d0 [nf_tables] nf_tables_abort+0xcf2/0x3ac0 [nf_tables] nfnetlink_rcv_batch+0x9c9/0x20e0 [..]
Severity
7.8 (High)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
SSVC
Exploitation: none Automatable: no Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-10-16 15:07 UTC
CWE
Assigner
Linux CNA under the mitre root
CNA scorecard D 53/100 over 7033 records in the last 180 days details
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: 25aa2ad37c2162be1c0bc4fe6397f7e4c13f00f8 , < ae8f3cedc5f5653a5bed45c5ed016fe156e2af55 (git)
Affected: d60be2da67d172aecf866302c91ea11533eca4d9 , < c4d4e86fda707d89eaba80e343321737375f8582 (git)
Affected: 628bd3e49cba1c066228e23d71a852c23e26da73 , < 4830fb44d12f586f3f544609e086933649a9175a (git)
Affected: 628bd3e49cba1c066228e23d71a852c23e26da73 , < eb0948fa13298212c5f8b30ee48efdae4389ab09 (git)
Affected: 628bd3e49cba1c066228e23d71a852c23e26da73 , < de47a88c6b807910f05703fb6605f7efdaa11417 (git)
Affected: 628bd3e49cba1c066228e23d71a852c23e26da73 , < 77c26b5056d693ffe5e9f040e946251cdb55ae55 (git)
Affected: 628bd3e49cba1c066228e23d71a852c23e26da73 , < 7cb9a23d7ae40a702577d3d8bacb7026f04ac2a9 (git)
Affected: bc9f791d2593f17e39f87c6e2b3a36549a3705b1 (git)
Affected: 3c7ec098e3b588434a8b07ea9b5b36f04cef1f50 (git)
Affected: a136b7942ad2a50de708f76ea299ccb45ac7a7f9 (git)
Affected: dc7cdf8cbcbf8b13de1df93f356ec04cdeef5c41 (git)
Affected: 5.15.121 , < 5.15.224 (semver)
Affected: 6.1.36 , < 6.1.177 (semver)
Affected: 4.19.316 , < 4.20 (semver)
Affected: 5.4.262 , < 5.5 (semver)
Affected: 5.10.188 , < 5.11 (semver)
Affected: 6.3.10 , < 6.4 (semver)
guessed Create a notification for this product.
Linux Linux Affected: 6.4
Unaffected: 0 , < 6.4 (semver)
Unaffected: 5.15.224 , ≤ 5.15.* (semver)
Unaffected: 6.1.177 , ≤ 6.1.* (semver)
Unaffected: 6.6.144 , ≤ 6.6.* (semver)
Unaffected: 6.12.78 , ≤ 6.12.* (semver)
Unaffected: 6.18.19 , ≤ 6.18.* (semver)
Unaffected: 6.19.9 , ≤ 6.19.* (semver)
Unaffected: 7.0 , ≤ * (original_commit_for_fix)
guessed Create a notification for this product.
Siemens SIMATIC S7-1500 TM MFP - GNU/Linux subsystem Affected: 0 , < * (custom)
guessed Create a notification for this product.
Show details on NVD website
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                "baseScore": 7.8,
                "baseSeverity": "HIGH",
                "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
                "version": "3.1"
              },
              "scenarios": [
                {
                  "lang": "en",
                  "value": "nf_tables catchall element walk breaks early, leaving second catchall element\u0027s chain references improperly toggled during abort. Leads to chain use-count underflow and UAF. Deterministic logic error reachable via unprivileged user namespaces."
                }
              ]
            }
          ],
          "providerMetadata": {
            "dateUpdated": "2026-10-30T12:23:54.849Z",
            "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "shortName": "Linux"
          },
          "references": [
            {
              "url": "https://git.kernel.org/stable/c/ae8f3cedc5f5653a5bed45c5ed016fe156e2af55"
            },
            {
              "url": "https://git.kernel.org/stable/c/c4d4e86fda707d89eaba80e343321737375f8582"
            },
            {
              "url": "https://git.kernel.org/stable/c/4830fb44d12f586f3f544609e086933649a9175a"
            },
            {
              "url": "https://git.kernel.org/stable/c/eb0948fa13298212c5f8b30ee48efdae4389ab09"
            },
            {
              "url": "https://git.kernel.org/stable/c/de47a88c6b807910f05703fb6605f7efdaa11417"
            },
            {
              "url": "https://git.kernel.org/stable/c/77c26b5056d693ffe5e9f040e946251cdb55ae55"
            },
            {
              "url": "https://git.kernel.org/stable/c/7cb9a23d7ae40a702577d3d8bacb7026f04ac2a9"
            }
          ],
          "title": "netfilter: nf_tables: always walk all pending catchall elements",
          "x_generator": {
            "engine": "bippy-1.2.0"
          }
        }
      },
      "cveMetadata": {
        "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "assignerShortName": "Linux",
        "cveId": "CVE-2026-23278",
        "datePublished": "2026-03-20T08:08:58.566Z",
        "dateReserved": "2026-01-13T15:37:45.991Z",
        "dateUpdated": "2026-10-30T12:23:54.849Z",
        "state": "PUBLISHED"
      },
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}



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