CVE-2026-72401 (GCVE-0-2026-72401)
Vulnerability from cvelistv5
Published
2026-08-15 05:56
Modified
2026-08-17 05:13
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: bpf: Fix insn_aux_data leak on verifier err_free_env path When bpf_check() allocates env->insn_aux_data successfully but later fails to allocate env->succ, it jumps directly to err_free_env. The existing vfree(env->insn_aux_data) sits before the err_free_env label, so that direct jump bypasses it and leaks insn_aux_data. Move vfree(env->insn_aux_data) into err_free_env so all early and late exit paths release it consistently.
References
Impacted products
Vendor Product Version
Linux Linux Version: 2f69c5685427308d2f312646779313f3677536bc
Version: 2f69c5685427308d2f312646779313f3677536bc
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      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "kernel/bpf/verifier.c"
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          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
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              "version": "6.19"
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              "version": "0",
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              "version": "7.1.5",
              "versionType": "semver"
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              "status": "unaffected",
              "version": "7.2",
              "versionType": "original_commit_for_fix"
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                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.1.5",
                  "versionStartIncluding": "6.19",
                  "vulnerable": true
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                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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              "negate": false,
              "operator": "OR"
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      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nbpf: Fix insn_aux_data leak on verifier err_free_env path\n\nWhen bpf_check() allocates env-\u003einsn_aux_data successfully but later\nfails to allocate env-\u003esucc, it jumps directly to err_free_env.\n\nThe existing vfree(env-\u003einsn_aux_data) sits before the err_free_env\nlabel, so that direct jump bypasses it and leaks insn_aux_data.\n\nMove vfree(env-\u003einsn_aux_data) into err_free_env so all early and late\nexit paths release it consistently."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-08-17T05:13:58.017Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/d8df91756890de058646597367507b239a6d2025"
        },
        {
          "url": "https://git.kernel.org/stable/c/26490a375cb9be9bac96b5171610fd85ca6c2305"
        }
      ],
      "title": "bpf: Fix insn_aux_data leak on verifier err_free_env path",
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  "cveMetadata": {
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    "assignerShortName": "Linux",
    "cveId": "CVE-2026-72401",
    "datePublished": "2026-08-15T05:56:26.197Z",
    "dateReserved": "2026-08-09T03:40:39.925Z",
    "dateUpdated": "2026-08-17T05:13:58.017Z",
    "state": "PUBLISHED"
  },
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  "dataVersion": "5.2"
}


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