cve-2024-26731
Vulnerability from cvelistv5
Published
2024-04-03 17:00
Modified
2024-08-02 00:14
Severity
Summary
bpf, sockmap: Fix NULL pointer dereference in sk_psock_verdict_data_ready()
References
SourceURLTags
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
VendorProduct
LinuxLinux
LinuxLinux
Show details on NVD website

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    "dateReserved": "2024-02-19T14:20:24.164Z",
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    "nvd": "{\"cve\":{\"id\":\"CVE-2024-26731\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2024-04-03T17:15:50.927\",\"lastModified\":\"2024-04-03T17:24:18.150\",\"vulnStatus\":\"Awaiting Analysis\",\"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.\"}],\"metrics\":{},\"references\":[{\"url\":\"https://git.kernel.org/stable/c/4588b13abcbd561ec67f5b3c1cb2eff690990a54\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/4cd12c6065dfcdeba10f49949bffcf383b3952d8\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/9b099ed46dcaf1403c531ff02c3d7400fa37fa26\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/d61608a4e394f23e0dca099df9eb8e555453d949\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}"
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