{
  "schema_version": "1.6.1",
  "id": "RPI-CVE-2024-49951",
  "modified": "2026-10-09T11:39:44Z",
  "upstream": [
    "CVE-2024-49951"
  ],
  "published": "2024-10-21T18:02:47Z",
  "summary": "Bluetooth: MGMT: Fix possible crash on mgmt_index_removed",
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nBluetooth: MGMT: Fix possible crash on mgmt_index_removed\n\nIf mgmt_index_removed is called while there are commands queued on\ncmd_sync it could lead to crashes like the bellow trace:\n\n0x0000053D: __list_del_entry_valid_or_report+0x98/0xdc\n0x0000053D: mgmt_pending_remove+0x18/0x58 [bluetooth]\n0x0000053E: mgmt_remove_adv_monitor_complete+0x80/0x108 [bluetooth]\n0x0000053E: hci_cmd_sync_work+0xbc/0x164 [bluetooth]\n\nSo while handling mgmt_index_removed this attempts to dequeue\ncommands passed as user_data to cmd_sync.",
  "severity": [
    {
      "type": "CVSS_V3",
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H"
    }
  ],
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  "references": [
    {
      "type": "ADVISORY",
      "url": "https://www.cve.org/CVERecord?id=CVE-2024-49951"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/19b40ca62607cef78369549d1af091f2fd558931"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/4883296505aa7e4863c6869b689afb6005633b23"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/0cc47233af35fb5f10b5e6a027cb4ccd480caf9a"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/8c3f7943a29145d8a2d8e24893762f7673323eae"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/f53e1c9c726d83092167f2226f32bd3b73f26c21"
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  "database_specific": {
    "source": "https://git.kernel.org/pub/scm/linux/security/vulns.git",
    "upstream_modified": "2026-08-05T11:52:36Z",
    "severity": {
      "source": "kernel CNA",
      "cvss_v3_score": 7.8,
      "cvss_v3_severity": "High",
      "scenario": "AV:L - The vulnerability is triggered through the local Bluetooth management socket (AF_BLUETOOTH/BTPROTO_HCI, HCI_CHANNEL_CONTROL) by submitting mgmt commands and then powering off or removing the adapter index; no over-the-air Bluetooth data reaches this path.\nAC:L - The attacker controls both sides of the sequence \u2014 queue any cmd_sync-backed mgmt command (e.g. REMOVE_ADV_MONITOR, ADD_ADV_PATTERNS_MONITOR) and then issue SET_POWERED(off), which executes __mgmt_power_off from inside hci_cmd_sync_work and frees the pending cmd while the worker still holds it in cmd_sync_work_list. The stale entry is then processed deterministically in the same worker loop.\nPR:L - Reaching the mgmt command handlers requires a trusted control socket (CAP_NET_ADMIN), which on real deployments is held by non-root Bluetooth service accounts (bluetoothd, Android's Bluetooth stack), so a compromised unprivileged service reaches it; the power-off half is additionally reachable by ordinary desktop/session users via rfkill and D-Bus. Consistent with prior kernel.org scoring of the same mgmt_pending UAF class (CVE-2025-38118, CVE-2026-31511).\nUI:N - The full sequence is issued by the attacker's own process through the mgmt socket; no action by another user or victim is needed.\nS:U - The use-after-free corrupts kernel heap state within the same kernel security authority; no VM, IOMMU, or sandbox boundary is crossed.\nC:H - The freed mgmt_pending_cmd is re-read after being reclaimed, and mgmt_cmd_complete() sends cmd->param/cmd->param_len from the stale allocation back to the attacker's socket, disclosing arbitrary reallocated kernel heap contents.\nI:H - mgmt_pending_remove() performs list_del on the freed and attacker-reclaimable object, yielding a controlled kernel write primitive, and sock_put(cmd->sk) decrements a refcount through a stale pointer \u2014 both leveragable for privilege escalation via heap grooming.\nA:H - The reported failure is a kernel crash in __list_del_entry_valid_or_report from mgmt_pending_remove; any unexploited attempt reliably oopses or panics the kernel."
    }
  }
}