bpf: Fix insn_aux_data leak on verifier err_free_env path

{
  "id": "38a602b4c518f901de62009d47e03eb9edc709647e4e1d7f7616bf10a4accfcc",
  "url": "https://osv.dev/vulnerability/CVE-2026-72401",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "bpf: Fix insn_aux_data leak on verifier err_free_env path",
    "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.",
    "evidence": "osv:CVE-2026-72401",
    "products": [
      {
        "name": {
          "value": "Kernel",
          "evidence": "/affected/1/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "7.1.5",
            "evidence": "/affected/1/ranges"
          }
        ],
        "affected_versions": []
      }
    ],
    "severity": "unknown",
    "structured": {
      "id": "CVE-2026-72401",
      "aliases": [
        "CVE-2026-72401"
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
              "type": "GIT",
              "events": [
                {
                  "introduced": "2f69c5685427308d2f312646779313f3677536bc"
                },
                {
                  "fixed": "d8df91756890de058646597367507b239a6d2025"
                },
                {
                  "fixed": "26490a375cb9be9bac96b5171610fd85ca6c2305"
                }
              ]
            }
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-72401.json"
          }
        },
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "6.19.0"
                },
                {
                  "fixed": "7.1.5"
                }
              ]
            }
          ],
          "package": {
            "name": "Kernel",
            "ecosystem": "Linux"
          },
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-72401.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:52.557414629Z",
      "provider": "osv",
      "references": [
        "https://git.kernel.org/stable/c/26490a375cb9be9bac96b5171610fd85ca6c2305",
        "https://git.kernel.org/stable/c/d8df91756890de058646597367507b239a6d2025",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/72xxx/CVE-2026-72401.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-72401",
        "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
      ],
      "provider_metadata": {
        "cna_assigner": "Linux",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/72xxx/CVE-2026-72401.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-72401",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": null
  },
  "source_id": "core-osv",
  "document_id": 521429,
  "published_at": "2026-08-15T05:56:26.197+00:00"
}