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Bluetooth: hci_core: Fix UAF in hci_unregister_dev()

Type: advisorySource: Official CVE List1 source record

In the Linux kernel, the following vulnerability has been resolved: Bluetooth: hci_core: Fix UAF in hci_unregister_dev() hci_unregister_dev() does not disable cmd_timer and ncmd_timer before the hci_dev structure is freed. If a timeout fires during device teardown, the callback dereferences freed memory (including the hdev->reset function pointer), leading to a use-after-free. Add disable_delayed_work_sync() calls alongside the existing disable_work_sync() calls to ensure both timers are fully quiesced before teardown proceeds.

Announced Source revision 1
Original source ↗

CVE-2026-74302

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-2026-74302

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": "d6cbce18370641a21dd889e8613d8153df15eb39",
        "lessThan": "bce2eec05bce548b548aca52c1834540f97d5d60",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "0d151a103775dd9645c78c97f77d6e2a5298d913",
        "lessThan": "48c7ad6afcc58c2cda11fed39791708103b6a644",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "0d151a103775dd9645c78c97f77d6e2a5298d913",
        "lessThan": "a0fd1086a57b982f8c24ae4ab165c2af39fe1735",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "0d151a103775dd9645c78c97f77d6e2a5298d913",
        "lessThan": "672d52d9412252e61b8de8d773ccdf5a277cf540",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "0d151a103775dd9645c78c97f77d6e2a5298d913",
        "lessThan": "5edcc018fa6e80b2c478454a4a8229c23d67c181",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "48542881997e17b49dc16b93fe910e0cfcf7a9f9",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "9cfc84b1d464cc024286f42a090718f9067b80ed",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "ddeda6ca5f218b668b560d90fc31ae469adbfd92",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "d2ce562a5aff1dcd0c50d9808ea825ef90da909f",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "96600c2e5ee8213dbab5df1617293d8e847bb4fa",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "3f939bd73fed12dddc2a32a76116c19ca47c7678",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "6.6.42",
        "lessThan": "6.6.160",
        "versionType": "semver"
      },
      {
        "status": "affected",
        "version": "4.19.319",
        "lessThan": "4.20",
        "versionType": "semver"
      },
      {
        "status": "affected",
        "version": "5.4.281",
        "lessThan": "5.5",
        "versionType": "semver"
      },
      {
        "status": "affected",
        "version": "5.10.223",
        "lessThan": "5.11",
        "versionType": "semver"
      },
      {
        "status": "affected",
        "version": "5.15.164",
        "lessThan": "5.16",
        "versionType": "semver"
      },
      {
        "status": "affected",
        "version": "6.1.101",
        "lessThan": "6.2",
        "versionType": "semver"
      },
      {
        "status": "affected",
        "version": "6.9.11",
        "lessThan": "6.10",
        "versionType": "semver"
      }
    ],
    "programFiles": [
      "net/bluetooth/hci_core.c"
    ],
    "defaultStatus": "unaffected"
  },
  {
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "vendor": "Linux",
    "product": "Linux",
    "versions": [
      {
        "status": "affected",
        "version": "6.10"
      },
      {
        "status": "unaffected",
        "version": "0",
        "lessThan": "6.10",
        "versionType": "semver"
      },
      {
        "status": "unaffected",
        "version": "6.6.160",
        "versionType": "semver",
        "lessThanOrEqual": "6.6.*"
      },
      {
        "status": "unaffected",
        "version": "6.12.97",
        "versionType": "semver",
        "lessThanOrEqual": "6.12.*"
      },
      {
        "status": "unaffected",
        "version": "6.18.40",
        "versionType": "semver",
        "lessThanOrEqual": "6.18.*"
      },
      {
        "status": "unaffected",
        "version": "7.1.5",
        "versionType": "semver",
        "lessThanOrEqual": "7.1.*"
      },
      {
        "status": "unaffected",
        "version": "7.2",
        "versionType": "original_commit_for_fix",
        "lessThanOrEqual": "*"
      }
    ],
    "programFiles": [
      "net/bluetooth/hci_core.c"
    ],
    "defaultStatus": "affected"
  }
]
Related CVEs
CVE-2026-74302

Source reference: /cveMetadata/cveId

Publisher severity

high

Source reference: /containers/cna/metrics

Event
#46541 · Revision 1
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Publisher date
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