{
  "schema_version": "1.6.1",
  "id": "RPI-CVE-2024-50125",
  "modified": "2026-10-09T11:39:44Z",
  "upstream": [
    "CVE-2024-50125"
  ],
  "published": "2024-11-05T17:11:07Z",
  "summary": "Bluetooth: SCO: Fix UAF on sco_sock_timeout",
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nBluetooth: SCO: Fix UAF on sco_sock_timeout\n\nconn->sk maybe have been unlinked/freed while waiting for sco_conn_lock\nso this checks if the conn->sk is still valid by checking if it part of\nsco_sk_list.",
  "severity": [
    {
      "type": "CVSS_V3",
      "score": "CVSS:3.1/AV:A/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-2024-50125"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/678386459ffc07d2fbfbfe33456013786975cfef"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/74a466a15731a754bcd8b5a83c126b5122e15a45"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/9ddda5d967e84796e7df1b54a55f36b4b9f21079"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/d30803f6a972b5b9e26d1d43b583c7ec151de04b"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/80b05fbfa998480fb3d5299d93eab946f51e9c36"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/1bf4470a3939c678fb822073e9ea77a0560bc6bb"
    }
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  "database_specific": {
    "source": "https://git.kernel.org/pub/scm/linux/security/vulns.git",
    "upstream_modified": "2026-08-19T16:47:12Z",
    "severity": {
      "source": "kernel CNA",
      "cvss_v3_score": 8.0,
      "cvss_v3_severity": "High",
      "scenario": "AV:A - The vulnerable path lives in the Bluetooth SCO stack and only executes when `conn->hcon` is non-NULL, i.e. an actual SCO/eSCO link exists with an in-range Bluetooth peer; `sco_conn_del()` (the second patched call site) is driven directly by `sco_connect_cfm`/`sco_disconn_cfm` from the adjacent device. Bluetooth radio proximity is required, matching the Adjacent classification.\nAC:L - The attacker controls both sides of the race: `SO_SNDTIMEO` sets `sk->sk_sndtimeo`, which `sco_connect()` passes verbatim to `sco_sock_set_timer()`, so the timeout work can be scheduled to fire at an arbitrarily chosen moment and raced against `close()`, and `sco_sock_clear_timer()` uses non-sync `cancel_delayed_work()` so an in-flight work item is never waited for. syzbot produced a reproducer and confirmed the fix.\nPR:L - There is no `capable()` or `CAP_NET_*` check anywhere in `sco_sock_create/bind/listen/connect`, so any unprivileged local user can create SCO sockets and drive the connect/close sequence that frees the socket. Only basic local account access is needed, not root.\nUI:N - The whole sequence \u2014 socket creation, `SO_SNDTIMEO`, connect, close \u2014 is performed by the attacker's own process against a system Bluetooth adapter. No victim action is required.\nS:U - The use-after-free corrupts kernel heap memory within the same kernel security authority; there is no VM, IOMMU, or sandbox boundary crossed.\nC:H - A use-after-free on `struct sock` lets the attacker respray the freed slab object and read back its contents through subsequent socket operations, giving a path to arbitrary kernel memory disclosure.\nI:H - The stale pointer is written through \u2014 `sock_hold()` performs an atomic increment on freed memory and `sk->sk_err = ETIMEDOUT` writes into it \u2014 and `sk->sk_state_change(sk)` performs an indirect call through a function pointer read from the freed object, providing a control-flow hijack primitive.\nA:H - Even without successful exploitation the UAF produces a KASAN splat / kernel oops or panic in `sco_sock_timeout()`, and it can be triggered repeatedly by an unprivileged process."
    }
  }
}