{"id":"CVE-2024-38596","summary":"af_unix: Fix data races in unix_release_sock/unix_stream_sendmsg","details":"In the Linux kernel, the following vulnerability has been resolved:\n\naf_unix: Fix data races in unix_release_sock/unix_stream_sendmsg\n\nA data-race condition has been identified in af_unix. In one data path,\nthe write function unix_release_sock() atomically writes to\nsk-\u003esk_shutdown using WRITE_ONCE. However, on the reader side,\nunix_stream_sendmsg() does not read it atomically. Consequently, this\nissue is causing the following KCSAN splat to occur:\n\n\tBUG: KCSAN: data-race in unix_release_sock / unix_stream_sendmsg\n\n\twrite (marked) to 0xffff88867256ddbb of 1 bytes by task 7270 on cpu 28:\n\tunix_release_sock (net/unix/af_unix.c:640)\n\tunix_release (net/unix/af_unix.c:1050)\n\tsock_close (net/socket.c:659 net/socket.c:1421)\n\t__fput (fs/file_table.c:422)\n\t__fput_sync (fs/file_table.c:508)\n\t__se_sys_close (fs/open.c:1559 fs/open.c:1541)\n\t__x64_sys_close (fs/open.c:1541)\n\tx64_sys_call (arch/x86/entry/syscall_64.c:33)\n\tdo_syscall_64 (arch/x86/entry/common.c:?)\n\tentry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130)\n\n\tread to 0xffff88867256ddbb of 1 bytes by task 989 on cpu 14:\n\tunix_stream_sendmsg (net/unix/af_unix.c:2273)\n\t__sock_sendmsg (net/socket.c:730 net/socket.c:745)\n\t____sys_sendmsg (net/socket.c:2584)\n\t__sys_sendmmsg (net/socket.c:2638 net/socket.c:2724)\n\t__x64_sys_sendmmsg (net/socket.c:2753 net/socket.c:2750 net/socket.c:2750)\n\tx64_sys_call (arch/x86/entry/syscall_64.c:33)\n\tdo_syscall_64 (arch/x86/entry/common.c:?)\n\tentry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130)\n\n\tvalue changed: 0x01 -\u003e 0x03\n\nThe line numbers are related to commit dd5a440a31fa (\"Linux 6.9-rc7\").\n\nCommit e1d09c2c2f57 (\"af_unix: Fix data races around sk-\u003esk_shutdown.\")\naddressed a comparable issue in the past regarding sk-\u003esk_shutdown.\nHowever, it overlooked resolving this particular data path.\nThis patch only offending unix_stream_sendmsg() function, since the\nother reads seem to be protected by unix_state_lock() as discussed in","modified":"2026-04-02T12:16:53.758040Z","published":"2024-06-19T13:45:45.984Z","related":["ALSA-2024:5101","MGASA-2024-0263","MGASA-2024-0266","SUSE-SU-2024:3551-1","SUSE-SU-2024:3559-1","SUSE-SU-2024:3561-1","SUSE-SU-2024:3564-1","SUSE-SU-2024:3566-1","SUSE-SU-2024:3569-1","SUSE-SU-2024:3587-1","SUSE-SU-2024:3591-1","SUSE-SU-2024:3592-1","SUSE-SU-2025:20073-1","SUSE-SU-2025:20077-1"],"database_specific":{"cna_assigner":"Linux","osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2024/38xxx/CVE-2024-38596.json"},"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/0688d4e499bee3f2749bca27329bd128686230cb"},{"type":"WEB","url":"https://git.kernel.org/stable/c/4d51845d734a4c5d079e56e0916f936a55e15055"},{"type":"WEB","url":"https://git.kernel.org/stable/c/540bf24fba16b88c1b3b9353927204b4f1074e25"},{"type":"WEB","url":"https://git.kernel.org/stable/c/8299e4d778f664b31b67cf4cf3d5409de2ecb92c"},{"type":"WEB","url":"https://git.kernel.org/stable/c/9aa8773abfa0e954136875b4cbf2df4cf638e8a5"},{"type":"WEB","url":"https://git.kernel.org/stable/c/a4c88072abcaca593cefe70f90e9d3707526e8f9"},{"type":"WEB","url":"https://git.kernel.org/stable/c/a52fa2addfcccc2c5a0217fd45562605088c018b"},{"type":"WEB","url":"https://git.kernel.org/stable/c/de6641d213373fbde9bbdd7c4b552254bc9f82fe"},{"type":"WEB","url":"https://git.kernel.org/stable/c/fca6072e1a7b1e709ada5604b951513b89b4bd0a"},{"type":"WEB","url":"https://lists.debian.org/debian-lts-announce/2024/06/msg00020.html"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2024/38xxx/CVE-2024-38596.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2024-38596"},{"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":"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2"},{"fixed":"fca6072e1a7b1e709ada5604b951513b89b4bd0a"},{"fixed":"de6641d213373fbde9bbdd7c4b552254bc9f82fe"},{"fixed":"4d51845d734a4c5d079e56e0916f936a55e15055"},{"fixed":"9aa8773abfa0e954136875b4cbf2df4cf638e8a5"},{"fixed":"8299e4d778f664b31b67cf4cf3d5409de2ecb92c"},{"fixed":"0688d4e499bee3f2749bca27329bd128686230cb"},{"fixed":"a4c88072abcaca593cefe70f90e9d3707526e8f9"},{"fixed":"a52fa2addfcccc2c5a0217fd45562605088c018b"},{"fixed":"540bf24fba16b88c1b3b9353927204b4f1074e25"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2024-38596.json"}}],"schema_version":"1.7.5"}