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netfilter: nf_tables: reject mismatching sum of field_len with set key length

Type: advisorySource: Official CVE List1 source record

In the Linux kernel, the following vulnerability has been resolved: netfilter: nf_tables: reject mismatching sum of field_len with set key length The field length description provides the length of each separated key field in the concatenation, each field gets rounded up to 32-bits to calculate the pipapo rule width from pipapo_init(). The set key length provides the total size of the key aligned to 32-bits. Register-based arithmetics still allows for combining mismatching set key length and field length description, eg. set key length 10 and field description [ 5, 4 ] leading to pipapo width of 12.

Announced Source revision 1
Original source ↗

CVE-2025-21826

Primary source · Revision 1

Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.

Security context

Source reference: cve:CVE-2025-21826

Linux

Source reference: /containers/cna/affected/0/product

Affected versions
Not stated in this record
Fixed versions
Not stated in this record
Prerequisites
Not stated in this record

Linux

Source reference: /containers/cna/affected/1/product

Affected versions
Not stated in this record
Fixed versions
Not stated in this record
Prerequisites
Not stated in this record

Structured affected-version data

Original package identities and version rules from this source.

[
  {
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "vendor": "Linux",
    "product": "Linux",
    "versions": [
      {
        "status": "affected",
        "version": "2d4c0798a1ef8db15b3277697ac2def4eda42312",
        "lessThan": "6b467c8feac759f4c5c86d708beca2aa2b29584f",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "77be8c495a3f841e88b46508cc20d3d7d3289da3",
        "lessThan": "5083a7ae45003456c253e981b30a43f71230b4a3",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "9cb084df01e198119de477ac691d682fb01e80f3",
        "lessThan": "2ac254343d3cf228ae0738b2615fedf85d000752",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "dc45bb00e66a33de1abb29e3d587880e1d4d9a7e",
        "lessThan": "82e491e085719068179ff6a5466b7387cc4bbf32",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "3ce67e3793f48c1b9635beb9bb71116ca1e51b58",
        "lessThan": "49b7182b97bafbd5645414aff054b4a65d05823d",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "3ce67e3793f48c1b9635beb9bb71116ca1e51b58",
        "lessThan": "ab50d0eff4a939d20c37721fd9766347efcdb6f6",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "3ce67e3793f48c1b9635beb9bb71116ca1e51b58",
        "lessThan": "1b9335a8000fb70742f7db10af314104b6ace220",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "ff67e3e488090908dc015ba04d7407d8bd467f7e",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "5.10.209",
        "lessThan": "5.10.235",
        "versionType": "semver"
      },
      {
        "status": "affected",
        "version": "5.15.148",
        "lessThan": "5.15.179",
        "versionType": "semver"
      },
      {
        "status": "affected",
        "version": "6.1.75",
        "lessThan": "6.1.129",
        "versionType": "semver"
      },
      {
        "status": "affected",
        "version": "6.6.14",
        "lessThan": "6.6.76",
        "versionType": "semver"
      },
      {
        "status": "affected",
        "version": "6.7.2",
        "lessThan": "6.8",
        "versionType": "semver"
      }
    ],
    "programFiles": [
      "net/netfilter/nf_tables_api.c"
    ],
    "defaultStatus": "unaffected"
  },
  {
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "vendor": "Linux",
    "product": "Linux",
    "versions": [
      {
        "status": "affected",
        "version": "6.8"
      },
      {
        "status": "unaffected",
        "version": "0",
        "lessThan": "6.8",
        "versionType": "semver"
      },
      {
        "status": "unaffected",
        "version": "5.10.235",
        "versionType": "semver",
        "lessThanOrEqual": "5.10.*"
      },
      {
        "status": "unaffected",
        "version": "5.15.179",
        "versionType": "semver",
        "lessThanOrEqual": "5.15.*"
      },
      {
        "status": "unaffected",
        "version": "6.1.129",
        "versionType": "semver",
        "lessThanOrEqual": "6.1.*"
      },
      {
        "status": "unaffected",
        "version": "6.6.76",
        "versionType": "semver",
        "lessThanOrEqual": "6.6.*"
      },
      {
        "status": "unaffected",
        "version": "6.12.13",
        "versionType": "semver",
        "lessThanOrEqual": "6.12.*"
      },
      {
        "status": "unaffected",
        "version": "6.13.2",
        "versionType": "semver",
        "lessThanOrEqual": "6.13.*"
      },
      {
        "status": "unaffected",
        "version": "6.14",
        "versionType": "original_commit_for_fix",
        "lessThanOrEqual": "*"
      }
    ],
    "programFiles": [
      "net/netfilter/nf_tables_api.c"
    ],
    "defaultStatus": "affected"
  }
]
Related CVEs
CVE-2025-21826

Source reference: /cveMetadata/cveId

Publisher severity

high

Source reference: /containers/cna/metrics

Event
#26952 · Revision 1
Added to Heist Feed
Publisher date
Read the original announcement