{"id":"CVE-2024-26731","summary":"bpf, sockmap: Fix NULL pointer dereference in sk_psock_verdict_data_ready()","details":"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.","modified":"2026-04-02T10:05:52.493775Z","published":"2024-04-03T17:00:18.823Z","related":["SUSE-SU-2024:2135-1","SUSE-SU-2024:2203-1","SUSE-SU-2024:2973-1","SUSE-SU-2025:20008-1"],"database_specific":{"cna_assigner":"Linux","osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2024/26xxx/CVE-2024-26731.json"},"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/4588b13abcbd561ec67f5b3c1cb2eff690990a54"},{"type":"WEB","url":"https://git.kernel.org/stable/c/4cd12c6065dfcdeba10f49949bffcf383b3952d8"},{"type":"WEB","url":"https://git.kernel.org/stable/c/9b099ed46dcaf1403c531ff02c3d7400fa37fa26"},{"type":"WEB","url":"https://git.kernel.org/stable/c/d61608a4e394f23e0dca099df9eb8e555453d949"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2024/26xxx/CVE-2024-26731.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2024-26731"},{"type":"PACKAGE","url":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"dd628fc697ee59b76bd3877c4bd13f07ccc3776f"},{"fixed":"4588b13abcbd561ec67f5b3c1cb2eff690990a54"}]},{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"6df7f764cd3cf5a03a4a47b23be47e57e41fcd85"},{"fixed":"9b099ed46dcaf1403c531ff02c3d7400fa37fa26"},{"fixed":"d61608a4e394f23e0dca099df9eb8e555453d949"},{"fixed":"4cd12c6065dfcdeba10f49949bffcf383b3952d8"}]},{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"0"},{"last_affected":"d3cbd7c571446a876aefd8320500300b2c951c58"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2024-26731.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L"}]}