FKIE_CVE-2024-26731

Vulnerability from fkie_nvd - Published: 2024-04-03 17:15 - Updated: 2025-04-03 17:09
Severity ?
5.3 (Medium) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
Summary
In the Linux kernel, the following vulnerability has been resolved: bpf, sockmap: Fix NULL pointer dereference in sk_psock_verdict_data_ready() syzbot reported the following NULL pointer dereference issue [1]: BUG: kernel NULL pointer dereference, address: 0000000000000000 [...] RIP: 0010:0x0 [...] Call Trace: <TASK> sk_psock_verdict_data_ready+0x232/0x340 net/core/skmsg.c:1230 unix_stream_sendmsg+0x9b4/0x1230 net/unix/af_unix.c:2293 sock_sendmsg_nosec net/socket.c:730 [inline] __sock_sendmsg+0x221/0x270 net/socket.c:745 ____sys_sendmsg+0x525/0x7d0 net/socket.c:2584 ___sys_sendmsg net/socket.c:2638 [inline] __sys_sendmsg+0x2b0/0x3a0 net/socket.c:2667 do_syscall_64+0xf9/0x240 entry_SYSCALL_64_after_hwframe+0x6f/0x77 If sk_psock_verdict_data_ready() and sk_psock_stop_verdict() are called concurrently, psock->saved_data_ready can be NULL, causing the above issue. This patch fixes this issue by calling the appropriate data ready function using the sk_psock_data_ready() helper and protecting it from concurrency with sk->sk_callback_lock.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/4588b13abcbd561ec67f5b3c1cb2eff690990a54Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/4cd12c6065dfcdeba10f49949bffcf383b3952d8Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/9b099ed46dcaf1403c531ff02c3d7400fa37fa26Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/d61608a4e394f23e0dca099df9eb8e555453d949Patch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/4588b13abcbd561ec67f5b3c1cb2eff690990a54Patch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/4cd12c6065dfcdeba10f49949bffcf383b3952d8Patch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/9b099ed46dcaf1403c531ff02c3d7400fa37fa26Patch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/d61608a4e394f23e0dca099df9eb8e555453d949Patch
Impacted products
Vendor Product Version
linux linux_kernel *
linux linux_kernel *
linux linux_kernel *
linux linux_kernel 6.8
linux linux_kernel 6.8
linux linux_kernel 6.8
linux linux_kernel 6.8
linux linux_kernel 6.8
To clipboard 

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  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nbpf, sockmap: Fix NULL pointer dereference in sk_psock_verdict_data_ready()\n\nsyzbot reported the following NULL pointer dereference issue [1]:\n\n  BUG: kernel NULL pointer dereference, address: 0000000000000000\n  [...]\n  RIP: 0010:0x0\n  [...]\n  Call Trace:\n   \u003cTASK\u003e\n   sk_psock_verdict_data_ready+0x232/0x340 net/core/skmsg.c:1230\n   unix_stream_sendmsg+0x9b4/0x1230 net/unix/af_unix.c:2293\n   sock_sendmsg_nosec net/socket.c:730 [inline]\n   __sock_sendmsg+0x221/0x270 net/socket.c:745\n   ____sys_sendmsg+0x525/0x7d0 net/socket.c:2584\n   ___sys_sendmsg net/socket.c:2638 [inline]\n   __sys_sendmsg+0x2b0/0x3a0 net/socket.c:2667\n   do_syscall_64+0xf9/0x240\n   entry_SYSCALL_64_after_hwframe+0x6f/0x77\n\nIf sk_psock_verdict_data_ready() and sk_psock_stop_verdict() are called\nconcurrently, psock-\u003esaved_data_ready can be NULL, causing the above issue.\n\nThis patch fixes this issue by calling the appropriate data ready function\nusing the sk_psock_data_ready() helper and protecting it from concurrency\nwith sk-\u003esk_callback_lock."
    },
    {
      "lang": "es",
      "value": "En el kernel de Linux, se resolvi\u00f3 la siguiente vulnerabilidad: bpf, sockmap: corrigi\u00f3 la desreferencia del puntero NULL en sk_psock_verdict_data_ready() syzbot inform\u00f3 el siguiente problema de desreferencia del puntero NULL [1]: ERROR: desreferencia del puntero NULL del kernel, direcci\u00f3n: 0000000000000000 [... ] RIP: 0010:0x0 [...] Seguimiento de llamadas:  sk_psock_verdict_data_ready+0x232/0x340 net/core/skmsg.c:1230 unix_stream_sendmsg+0x9b4/0x1230 net/unix/af_unix.c:2293 sock_sendmsg_nosec net/socket. c:730 [en l\u00ednea] __sock_sendmsg+0x221/0x270 net/socket.c:745 ____sys_sendmsg+0x525/0x7d0 net/socket.c:2584 ___sys_sendmsg net/socket.c:2638 [en l\u00ednea] __sys_sendmsg+0x2b0/0x3a0 net /socket. c:2667 do_syscall_64+0xf9/0x240 Entry_SYSCALL_64_after_hwframe+0x6f/0x77 Si sk_psock_verdict_data_ready() y sk_psock_stop_verdict() se llaman simult\u00e1neamente, psock-\u0026gt;saved_data_ready puede ser NULL, causando el problema anterior. Este parche soluciona este problema llamando a la funci\u00f3n de preparaci\u00f3n de datos adecuada utilizando el asistente sk_psock_data_ready() y protegi\u00e9ndola de la concurrencia con sk-\u0026gt;sk_callback_lock."
    }
  ],
  "id": "CVE-2024-26731",
  "lastModified": "2025-04-03T17:09:12.680",
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          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "LOW",
          "baseScore": 5.3,
          "baseSeverity": "MEDIUM",
          "confidentialityImpact": "NONE",
          "integrityImpact": "NONE",
          "privilegesRequired": "NONE",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L",
          "version": "3.1"
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        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "type": "Secondary"
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  "published": "2024-04-03T17:15:50.927",
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  "vulnStatus": "Analyzed",
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          "value": "CWE-476"
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}


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