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netfilter: xt_policy: fix strict mode inbound policy matching

Type: advisorySource: Official CVE List1 source record

In the Linux kernel, the following vulnerability has been resolved: netfilter: xt_policy: fix strict mode inbound policy matching match_policy_in() walks sec_path entries from the last transform to the first one, but strict policy matching needs to consume info->pol[] in the same forward order as the rule layout. Derive the strict-match policy position from the number of transforms already consumed so that multi-element inbound rules are matched consistently.

Announced Source revision 1
Original source ↗

CVE-2026-52920

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-2026-52920

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": "c4b885139203d37f76662c37ae645fe8e0f4e4e5",
        "lessThan": "eb323f7b82d2e2f638de0cc2a177803eb20e0707",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "c4b885139203d37f76662c37ae645fe8e0f4e4e5",
        "lessThan": "fc1c518bb1f054831ecabb32da9b8e1dff9699c6",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "c4b885139203d37f76662c37ae645fe8e0f4e4e5",
        "lessThan": "f98b7f85e04b40e28b08c461ded0cc79f14f5509",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "c4b885139203d37f76662c37ae645fe8e0f4e4e5",
        "lessThan": "82664d0f1ba25e4f9a71994954abae24c60f4067",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "c4b885139203d37f76662c37ae645fe8e0f4e4e5",
        "lessThan": "b130a6eefa02bd4d475f2f059da8bcfb3e7d18d9",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "c4b885139203d37f76662c37ae645fe8e0f4e4e5",
        "lessThan": "938867e870fb5471bb16f442aeac81326e05bf65",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "c4b885139203d37f76662c37ae645fe8e0f4e4e5",
        "lessThan": "392cc1d8408b5665215c1e9290bbf0f92339b043",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "c4b885139203d37f76662c37ae645fe8e0f4e4e5",
        "lessThan": "4b2b4d7d4e203c92db8966b163edfacb1f0e1e29",
        "versionType": "git"
      }
    ],
    "programFiles": [
      "net/netfilter/xt_policy.c"
    ],
    "defaultStatus": "unaffected"
  },
  {
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "vendor": "Linux",
    "product": "Linux",
    "versions": [
      {
        "status": "affected",
        "version": "2.6.17"
      },
      {
        "status": "unaffected",
        "version": "0",
        "lessThan": "2.6.17",
        "versionType": "semver"
      },
      {
        "status": "unaffected",
        "version": "5.10.258",
        "versionType": "semver",
        "lessThanOrEqual": "5.10.*"
      },
      {
        "status": "unaffected",
        "version": "5.15.209",
        "versionType": "semver",
        "lessThanOrEqual": "5.15.*"
      },
      {
        "status": "unaffected",
        "version": "6.1.175",
        "versionType": "semver",
        "lessThanOrEqual": "6.1.*"
      },
      {
        "status": "unaffected",
        "version": "6.6.141",
        "versionType": "semver",
        "lessThanOrEqual": "6.6.*"
      },
      {
        "status": "unaffected",
        "version": "6.12.91",
        "versionType": "semver",
        "lessThanOrEqual": "6.12.*"
      },
      {
        "status": "unaffected",
        "version": "6.18.33",
        "versionType": "semver",
        "lessThanOrEqual": "6.18.*"
      },
      {
        "status": "unaffected",
        "version": "7.0.10",
        "versionType": "semver",
        "lessThanOrEqual": "7.0.*"
      },
      {
        "status": "unaffected",
        "version": "7.1",
        "versionType": "original_commit_for_fix",
        "lessThanOrEqual": "*"
      }
    ],
    "programFiles": [
      "net/netfilter/xt_policy.c"
    ],
    "defaultStatus": "affected"
  }
]
Related CVEs
CVE-2026-52920

Source reference: /cveMetadata/cveId

Publisher severity

high

Source reference: /containers/cna/metrics

Event
#40694 · Revision 1
Added to Heist Feed
Publisher date
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