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Bluetooth: mgmt: fix UAF in pair command cancellation

Type: advisorySource: Official CVE List1 source record

In the Linux kernel, the following vulnerability has been resolved: Bluetooth: mgmt: fix UAF in pair command cancellation The pairing completion and authentication failure callbacks look up the pending MGMT_OP_PAIR_DEVICE command by walking hdev->mgmt_pending. The lookup returned a command that was still linked on the shared pending list, without keeping mgmt_pending_lock held for the later dereference and removal. A concurrent MGMT_OP_CANCEL_PAIR_DEVICE request can remove and free the same pending command before the callback uses it. The reverse race is also possible when cancel_pair_device() gets a command from pending_find() and a callback removes it before the cancel path dereferences it. This can lead to a use-after-free and a second list_del(). Make the pairing lookup helpers transfer ownership of the pending command by removing it from hdev->mgmt_pending while holding mgmt_pending_lock. The callbacks and cancel path then complete the command and free it directly, so racing paths cannot find or free the same command again. Take a temporary hci_conn reference in cancel_pair_device() because the command completion drops the reference stored in the pending command.

Announced Source revision 1
Original source ↗

CVE-2026-74510

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-2026-74510

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": "e9a416b5ce0c0f93819f55d34cf6882196e9c3b2",
        "lessThan": "50af4280a587c9971b5388cbc438f1324e626b7b",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "e9a416b5ce0c0f93819f55d34cf6882196e9c3b2",
        "lessThan": "86ed4dd6548ccf277bc691bc912ca06e76b9d80c",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "e9a416b5ce0c0f93819f55d34cf6882196e9c3b2",
        "lessThan": "7c2a152a897cd1c184b2051484d4f74d803e7f4a",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "e9a416b5ce0c0f93819f55d34cf6882196e9c3b2",
        "lessThan": "c569def320aa8b1fde89227e2ea96606790fd86d",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "e9a416b5ce0c0f93819f55d34cf6882196e9c3b2",
        "lessThan": "51be7280980fddc90ebe874a69c2fe8ab02bb46a",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "e9a416b5ce0c0f93819f55d34cf6882196e9c3b2",
        "lessThan": "d0a7b48ad0921bd88effaee10bf970ab1d5d0ddd",
        "versionType": "git"
      }
    ],
    "programFiles": [
      "net/bluetooth/mgmt.c"
    ],
    "defaultStatus": "unaffected"
  },
  {
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "vendor": "Linux",
    "product": "Linux",
    "versions": [
      {
        "status": "affected",
        "version": "2.6.39"
      },
      {
        "status": "unaffected",
        "version": "0",
        "lessThan": "2.6.39",
        "versionType": "semver"
      },
      {
        "status": "unaffected",
        "version": "6.1.184",
        "versionType": "semver",
        "lessThanOrEqual": "6.1.*"
      },
      {
        "status": "unaffected",
        "version": "6.6.151",
        "versionType": "semver",
        "lessThanOrEqual": "6.6.*"
      },
      {
        "status": "unaffected",
        "version": "6.12.103",
        "versionType": "semver",
        "lessThanOrEqual": "6.12.*"
      },
      {
        "status": "unaffected",
        "version": "6.18.44",
        "versionType": "semver",
        "lessThanOrEqual": "6.18.*"
      },
      {
        "status": "unaffected",
        "version": "7.1.8",
        "versionType": "semver",
        "lessThanOrEqual": "7.1.*"
      },
      {
        "status": "unaffected",
        "version": "7.2",
        "versionType": "original_commit_for_fix",
        "lessThanOrEqual": "*"
      }
    ],
    "programFiles": [
      "net/bluetooth/mgmt.c"
    ],
    "defaultStatus": "affected"
  }
]
Related CVEs
CVE-2026-74510

Source reference: /cveMetadata/cveId

Publisher severity

high

Source reference: /containers/cna/metrics

Event
#33188 · Revision 1
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Publisher date
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