{"id":"CVE-2023-54006","summary":"af_unix: Fix data-race around unix_tot_inflight.","details":"In the Linux kernel, the following vulnerability has been resolved:\n\naf_unix: Fix data-race around unix_tot_inflight.\n\nunix_tot_inflight is changed under spin_lock(unix_gc_lock), but\nunix_release_sock() reads it locklessly.\n\nLet's use READ_ONCE() for unix_tot_inflight.\n\nNote that the writer side was marked by commit 9d6d7f1cb67c (\"af_unix:\nannote lockless accesses to unix_tot_inflight & gc_in_progress\")\n\nBUG: KCSAN: data-race in unix_inflight / unix_release_sock\n\nwrite (marked) to 0xffffffff871852b8 of 4 bytes by task 123 on cpu 1:\n unix_inflight+0x130/0x180 net/unix/scm.c:64\n unix_attach_fds+0x137/0x1b0 net/unix/scm.c:123\n unix_scm_to_skb net/unix/af_unix.c:1832 [inline]\n unix_dgram_sendmsg+0x46a/0x14f0 net/unix/af_unix.c:1955\n sock_sendmsg_nosec net/socket.c:724 [inline]\n sock_sendmsg+0x148/0x160 net/socket.c:747\n ____sys_sendmsg+0x4e4/0x610 net/socket.c:2493\n ___sys_sendmsg+0xc6/0x140 net/socket.c:2547\n __sys_sendmsg+0x94/0x140 net/socket.c:2576\n __do_sys_sendmsg net/socket.c:2585 [inline]\n __se_sys_sendmsg net/socket.c:2583 [inline]\n __x64_sys_sendmsg+0x45/0x50 net/socket.c:2583\n do_syscall_x64 arch/x86/entry/common.c:50 [inline]\n do_syscall_64+0x3b/0x90 arch/x86/entry/common.c:80\n entry_SYSCALL_64_after_hwframe+0x72/0xdc\n\nread to 0xffffffff871852b8 of 4 bytes by task 4891 on cpu 0:\n unix_release_sock+0x608/0x910 net/unix/af_unix.c:671\n unix_release+0x59/0x80 net/unix/af_unix.c:1058\n __sock_release+0x7d/0x170 net/socket.c:653\n sock_close+0x19/0x30 net/socket.c:1385\n __fput+0x179/0x5e0 fs/file_table.c:321\n ____fput+0x15/0x20 fs/file_table.c:349\n task_work_run+0x116/0x1a0 kernel/task_work.c:179\n resume_user_mode_work include/linux/resume_user_mode.h:49 [inline]\n exit_to_user_mode_loop kernel/entry/common.c:171 [inline]\n exit_to_user_mode_prepare+0x174/0x180 kernel/entry/common.c:204\n __syscall_exit_to_user_mode_work kernel/entry/common.c:286 [inline]\n syscall_exit_to_user_mode+0x1a/0x30 kernel/entry/common.c:297\n do_syscall_64+0x4b/0x90 arch/x86/entry/common.c:86\n entry_SYSCALL_64_after_hwframe+0x72/0xdc\n\nvalue changed: 0x00000000 -\u003e 0x00000001\n\nReported by Kernel Concurrency Sanitizer on:\nCPU: 0 PID: 4891 Comm: systemd-coredum Not tainted 6.4.0-rc5-01219-gfa0e21fa4443 #5\nHardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.0-0-gd239552ce722-prebuilt.qemu.org 04/01/2014","modified":"2026-05-18T05:57:12.596916061Z","published":"2025-12-24T10:55:40.534Z","related":["SUSE-SU-2026:0278-1","SUSE-SU-2026:0281-1","SUSE-SU-2026:0293-1","SUSE-SU-2026:0315-1","SUSE-SU-2026:20477-1","SUSE-SU-2026:20498-1","SUSE-SU-2026:20845-1","SUSE-SU-2026:20876-1"],"database_specific":{"cna_assigner":"Linux","osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/54xxx/CVE-2023-54006.json"},"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/20aa8325464d8905450089eed96ca102a074d853"},{"type":"WEB","url":"https://git.kernel.org/stable/c/2d8933ca863e252fb09ad0be483255e3dfeb1f54"},{"type":"WEB","url":"https://git.kernel.org/stable/c/31b46d5e7c4e295bd112960614a66a177a057dca"},{"type":"WEB","url":"https://git.kernel.org/stable/c/5d91b7891f4a9a9d69d75e9f44ab4bf1f3b11840"},{"type":"WEB","url":"https://git.kernel.org/stable/c/ade32bd8a738d7497ffe9743c46728db26740f78"},{"type":"WEB","url":"https://git.kernel.org/stable/c/afc284a4a781defbb12b2a40427fae34c3d20e17"},{"type":"WEB","url":"https://git.kernel.org/stable/c/cf29b42766ad4af2ae6a449f583796951551b48d"},{"type":"WEB","url":"https://git.kernel.org/stable/c/e5edc6e44a882c0458878ab10eaddfe60ac34e57"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/54xxx/CVE-2023-54006.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2023-54006"},{"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":"9305cfa4443dbfb99faf35c5603ec0c0e91b5ef8"},{"fixed":"31b46d5e7c4e295bd112960614a66a177a057dca"},{"fixed":"20aa8325464d8905450089eed96ca102a074d853"},{"fixed":"5d91b7891f4a9a9d69d75e9f44ab4bf1f3b11840"},{"fixed":"cf29b42766ad4af2ae6a449f583796951551b48d"},{"fixed":"e5edc6e44a882c0458878ab10eaddfe60ac34e57"},{"fixed":"2d8933ca863e252fb09ad0be483255e3dfeb1f54"},{"fixed":"afc284a4a781defbb12b2a40427fae34c3d20e17"},{"fixed":"ade32bd8a738d7497ffe9743c46728db26740f78"}]}],"database_specific":{"source":"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2023-54006.json"}},{"package":{"name":"Kernel","ecosystem":"Linux"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"2.6.24"},{"fixed":"4.14.326"}]},{"type":"ECOSYSTEM","events":[{"introduced":"4.15.0"},{"fixed":"4.19.295"}]},{"type":"ECOSYSTEM","events":[{"introduced":"4.20.0"},{"fixed":"5.4.257"}]},{"type":"ECOSYSTEM","events":[{"introduced":"5.5.0"},{"fixed":"5.10.195"}]},{"type":"ECOSYSTEM","events":[{"introduced":"5.11.0"},{"fixed":"5.15.132"}]},{"type":"ECOSYSTEM","events":[{"introduced":"5.16.0"},{"fixed":"6.1.54"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.2.0"},{"fixed":"6.5.4"}]}],"database_specific":{"source":"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2023-54006.json"}}],"schema_version":"1.7.5"}