cve-2024-26731
Vulnerability from cvelistv5
Published
2024-04-03 17:00
Modified
2024-11-06 21:26
Severity ?
5.3 (Medium) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
Summary
bpf, sockmap: Fix NULL pointer dereference in sk_psock_verdict_data_ready()
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/4588b13abcbd561ec67f5b3c1cb2eff690990a54
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/4cd12c6065dfcdeba10f49949bffcf383b3952d8
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/9b099ed46dcaf1403c531ff02c3d7400fa37fa26
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/d61608a4e394f23e0dca099df9eb8e555453d949
Impacted products
LinuxLinux
LinuxLinux
Show details on NVD website

To clipboard 

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          "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."
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    "dateReserved": "2024-02-19T14:20:24.164Z",
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  }
}


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