CVE-2024-26731

{"id": "CVE-2024-26731", "cveTags": [], "metrics": {"cvssMetricV31": [{"type": "Secondary", "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 5.3, "attackVector": "NETWORK", "baseSeverity": "MEDIUM", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L", "integrityImpact": "NONE", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "LOW", "privilegesRequired": "NONE", "confidentialityImpact": "NONE"}, "impactScore": 1.4, "exploitabilityScore": 3.9}]}, "published": "2024-04-03T17:15:50.927", "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"}], "vulnStatus": "Awaiting Analysis", "weaknesses": [{"type": "Secondary", "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "description": [{"lang": "en", "value": "CWE-476"}]}], "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 <TASK>\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->saved_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->sk_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-&gt;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-&gt;sk_callback_lock."}], "lastModified": "2024-11-06T22:35:05.197", "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}