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Bluetooth: hci_event: fix LE list UAF on reset

Type: advisorySource: Official CVE List1 source record

In the Linux kernel, the following vulnerability has been resolved: Bluetooth: hci_event: fix LE list UAF on reset hci_cc_reset() clears the LE accept and resolving lists without taking hdev->lock. Other command-complete handlers serialize updates to these lists with that lock, and the debugfs readers hold it while walking them. This permits the reset completion and a debugfs read to interleave as follows: hci_rx_work debugfs reader ----------- -------------- lock hdev->lock fetch current entry list_del(entry) kfree(entry) read entry fields The reader then dereferences a freed list entry and may follow its stale next pointer. KASAN reported: BUG: KASAN: slab-use-after-free in white_list_show+0x15f/0x180 Read of size 1 at addr ffff8881015dab16 by task poc/95 Call Trace: white_list_show+0x15f/0x180 seq_read_iter+0x3ff/0x1190 seq_read+0x267/0x3d0 vfs_read+0x177/0xa20 ksys_read+0xf7/0x1c0 Allocated by task 91: hci_bdaddr_list_add+0x1a6/0x3a0 hci_cc_le_add_to_accept_list+0xab/0x140 hci_cmd_complete_evt+0x26c/0x9a0 hci_event_packet+0x454/0xb20 hci_rx_work+0x293/0x730 Freed by task 90: kfree+0x131/0x3c0 hci_bdaddr_list_clear+0xd8/0x160 hci_cc_reset+0x28a/0x370 hci_cmd_complete_evt+0x26c/0x9a0 hci_event_packet+0x454/0xb20 hci_rx_work+0x293/0x730 Take hdev->lock around both list clears. This matches the existing mutation and traversal locking convention.

Announced Source revision 1
Original source ↗

CVE-2026-80764

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-2026-80764

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": "a4d5504d5c39cc84f1f828e19967595597a8136e",
        "lessThan": "8e68c380290b1dd64a0a512ce66d0264130c46ed",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "a4d5504d5c39cc84f1f828e19967595597a8136e",
        "lessThan": "0628cc9b2fa29985a7b8c774741f8a736b0f5e7c",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "a4d5504d5c39cc84f1f828e19967595597a8136e",
        "lessThan": "d57702d4c55633c243da5a2fec37ae2ad4adb621",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "a4d5504d5c39cc84f1f828e19967595597a8136e",
        "lessThan": "39a3afb91be3cb465f46ce7a8e5696d9e33edf93",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "a4d5504d5c39cc84f1f828e19967595597a8136e",
        "lessThan": "b55e83a4ba31d40deae22d4e4dc8c84083e953c6",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "a4d5504d5c39cc84f1f828e19967595597a8136e",
        "lessThan": "25b05e3ce31d954540e99954bcc66cbceb27ab35",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "a4d5504d5c39cc84f1f828e19967595597a8136e",
        "lessThan": "33af47e847fe4a28b109673affb5874015d54f5a",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "0de8cd646b0152c9ddd10257d8284938d0df0181",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "3.18.3",
        "lessThan": "3.19",
        "versionType": "semver"
      }
    ],
    "programFiles": [
      "net/bluetooth/hci_event.c"
    ],
    "defaultStatus": "unaffected"
  },
  {
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "vendor": "Linux",
    "product": "Linux",
    "versions": [
      {
        "status": "affected",
        "version": "3.19"
      },
      {
        "status": "unaffected",
        "version": "0",
        "lessThan": "3.19",
        "versionType": "semver"
      },
      {
        "status": "unaffected",
        "version": "6.1.185",
        "versionType": "semver",
        "lessThanOrEqual": "6.1.*"
      },
      {
        "status": "unaffected",
        "version": "6.6.154",
        "versionType": "semver",
        "lessThanOrEqual": "6.6.*"
      },
      {
        "status": "unaffected",
        "version": "6.12.106",
        "versionType": "semver",
        "lessThanOrEqual": "6.12.*"
      },
      {
        "status": "unaffected",
        "version": "6.18.47",
        "versionType": "semver",
        "lessThanOrEqual": "6.18.*"
      },
      {
        "status": "unaffected",
        "version": "7.1.11",
        "versionType": "semver",
        "lessThanOrEqual": "7.1.*"
      },
      {
        "status": "unaffected",
        "version": "7.2.1",
        "versionType": "semver",
        "lessThanOrEqual": "7.2.*"
      },
      {
        "status": "unaffected",
        "version": "7.3",
        "versionType": "original_commit_for_fix",
        "lessThanOrEqual": "*"
      }
    ],
    "programFiles": [
      "net/bluetooth/hci_event.c"
    ],
    "defaultStatus": "affected"
  }
]
Related CVEs
CVE-2026-80764

Source reference: /cveMetadata/cveId

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Event
#34784 · Revision 1
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