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CVE-2026-74533 Bluetooth: ISO: fix race of kfree vs kref_get_unless_zero

🗓️ 15 Aug 2026 12:27:47Reported by LinuxType 
cvelist
 cvelist
🔗 www.cve.org👁 43 Views

Linux kernel Bluetooth ISO has a use-after-free race between kfree and kref_get_unless_zero in hci_conn::iso_data.

Related
Affected
Refs
[
  {
    "product": "Linux",
    "vendor": "Linux",
    "defaultStatus": "unaffected",
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "programFiles": [
      "include/net/bluetooth/hci_core.h",
      "net/bluetooth/hci_conn.c",
      "net/bluetooth/iso.c"
    ],
    "versions": [
      {
        "version": "dc26097bdb864a0d5955b9a25e43376ffc1af99b",
        "lessThan": "876a3e94c70d0859d1dad1c986112d4f0d99eba8",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "dc26097bdb864a0d5955b9a25e43376ffc1af99b",
        "lessThan": "af24e338bf5dafb80f42baa9a0b9e9b57b1c5d9c",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "f53e7489273dc2bb307bf50f319b3762d45534f0",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "a58d0f5dac322e16cc75334d000666512341bde5",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "6.11.11",
        "lessThan": "6.12",
        "status": "affected",
        "versionType": "semver"
      },
      {
        "version": "6.12.2",
        "lessThan": "6.13",
        "status": "affected",
        "versionType": "semver"
      }
    ]
  },
  {
    "product": "Linux",
    "vendor": "Linux",
    "defaultStatus": "affected",
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "programFiles": [
      "include/net/bluetooth/hci_core.h",
      "net/bluetooth/hci_conn.c",
      "net/bluetooth/iso.c"
    ],
    "versions": [
      {
        "version": "6.13",
        "status": "affected"
      },
      {
        "version": "0",
        "lessThan": "6.13",
        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "7.1.8",
        "lessThanOrEqual": "7.1.*",
        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "7.2",
        "lessThanOrEqual": "*",
        "status": "unaffected",
        "versionType": "original_commit_for_fix"
      }
    ]
  }
]

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