{"cve":"CVE-2024-26731","nvd":{"published":"2024-04-03T17:15:50.927","modified":"2026-06-17T07:18:11.920","status":"Analyzed","description":"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.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L","score":5.3},"cwes":["CWE-476"],"references":["https://git.kernel.org/stable/c/4588b13abcbd561ec67f5b3c1cb2eff690990a54","https://git.kernel.org/stable/c/4cd12c6065dfcdeba10f49949bffcf383b3952d8","https://git.kernel.org/stable/c/9b099ed46dcaf1403c531ff02c3d7400fa37fa26","https://git.kernel.org/stable/c/d61608a4e394f23e0dca099df9eb8e555453d949","https://git.kernel.org/stable/c/4588b13abcbd561ec67f5b3c1cb2eff690990a54"],"products":["linux:linux_kernel"],"source":"nvd","synced_at":"2026-10-19T21:47:51.568503435+00:00"},"epss":{"cve":"CVE-2024-26731","score":0.00828,"percentile":0.57527,"date":"2026-10-31"},"kev":null,"osv":[],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}