{
  "schema_version": "1.6.1",
  "id": "RPI-CVE-2024-56694",
  "modified": "2026-10-07T17:22:01Z",
  "upstream": [
    "CVE-2024-56694"
  ],
  "published": "2024-12-28T09:46:17Z",
  "summary": "bpf: fix recursive lock when verdict program return SK_PASS",
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nbpf: fix recursive lock when verdict program return SK_PASS\n\nWhen the stream_verdict program returns SK_PASS, it places the received skb\ninto its own receive queue, but a recursive lock eventually occurs, leading\nto an operating system deadlock. This issue has been present since v6.9.\n\n'''\nsk_psock_strp_data_ready\n    write_lock_bh(&sk->sk_callback_lock)\n    strp_data_ready\n      strp_read_sock\n        read_sock -> tcp_read_sock\n          strp_recv\n            cb.rcv_msg -> sk_psock_strp_read\n              # now stream_verdict return SK_PASS without peer sock assign\n              __SK_PASS = sk_psock_map_verd(SK_PASS, NULL)\n              sk_psock_verdict_apply\n                sk_psock_skb_ingress_self\n                  sk_psock_skb_ingress_enqueue\n                    sk_psock_data_ready\n                      read_lock_bh(&sk->sk_callback_lock) <= dead lock\n\n'''\n\nThis topic has been discussed before, but it has not been fixed.\nPrevious discussion:\nhttps://lore.kernel.org/all/6684a5864ec86_403d20898@john.notmuch",
  "affected": [
    {
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        "ecosystem": "Raspberry Pi OS:12",
        "name": "linux"
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        "1:6.6.51-1+rpt3",
        "1:6.6.62-1+rpt1"
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  "references": [
    {
      "type": "ADVISORY",
      "url": "https://www.cve.org/CVERecord?id=CVE-2024-56694"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/221109ba2127eabd0aa64718543638b58b15df56"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/6694f7acd625ed854bf6342926e771d65dad7f69"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/386efa339e08563dd33e83bc951aea5d407fe578"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/da2bc8a0c8f3ac66fdf980fc59936f851a083561"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/01f1b88acfd79103da0610b45471f6c88ea98d72"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/f84c5ef6ca23cc2f72f3b830d74f67944684bb05"
    },
    {
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      "url": "https://git.kernel.org/stable/c/8ca2a1eeadf09862190b2810697702d803ceef2d"
    }
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  "database_specific": {
    "source": "https://git.kernel.org/pub/scm/linux/security/vulns.git",
    "upstream_modified": "2026-08-05T11:52:36Z"
  }
}