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CVE-2026-31413 bpf: Fix unsound scalar forking in maybe_fork_scalars() for BPF_OR

🗓️ 12 Apr 2026 05:36:14Reported by LinuxType 
cvelist
 cvelist
🔗 www.cve.org👁 31 Views

Fixed unsound scalar forking for BPF_OR in maybe_fork_scalars to prevent verifier divergence.

Related
Affected
Refs
[
  {
    "product": "Linux",
    "vendor": "Linux",
    "defaultStatus": "unaffected",
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "programFiles": [
      "kernel/bpf/verifier.c"
    ],
    "versions": [
      {
        "version": "dea9989a3f3961faede93752cd81eb5a9514d911",
        "lessThan": "342aa1ee995ef5bbf876096dc3a5e51218d76fa4",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "4c122e8ae14950cf6b59d208fc5160f7c601e746",
        "lessThan": "58bd87d0e69204dbd739e4387a1edb0c4b1644e7",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "e52567173ba86dbffb990595fbe60e2e83899372",
        "lessThan": "d13281ae7ea8902b21d99d10a2c8caf0bdec0455",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "bffacdb80b93b7b5e96b26fad64cc490a6c7d6c7",
        "lessThan": "c845894ebd6fb43226b3118d6b017942550910c5",
        "status": "affected",
        "versionType": "git"
      }
    ]
  },
  {
    "product": "Linux",
    "vendor": "Linux",
    "defaultStatus": "unaffected",
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "programFiles": [
      "kernel/bpf/verifier.c"
    ],
    "versions": [
      {
        "version": "6.12.75",
        "lessThan": "6.12.80",
        "status": "affected",
        "versionType": "semver"
      },
      {
        "version": "6.18.16",
        "lessThan": "6.18.21",
        "status": "affected",
        "versionType": "semver"
      },
      {
        "version": "6.19.6",
        "lessThan": "6.19.11",
        "status": "affected",
        "versionType": "semver"
      }
    ]
  }
]

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11 May 2026 22:08Current
CVSS 3.17.8
EPSS0.00221
31