{"cve":"CVE-2023-54006","nvd":{"published":"2025-12-24T11:15:53.527","modified":"2026-06-17T06:46:31.470","status":"Deferred","description":"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 -> 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","cvss_v4":null,"cvss_v3":null,"cwes":[],"references":["https://git.kernel.org/stable/c/20aa8325464d8905450089eed96ca102a074d853","https://git.kernel.org/stable/c/2d8933ca863e252fb09ad0be483255e3dfeb1f54","https://git.kernel.org/stable/c/31b46d5e7c4e295bd112960614a66a177a057dca","https://git.kernel.org/stable/c/5d91b7891f4a9a9d69d75e9f44ab4bf1f3b11840","https://git.kernel.org/stable/c/ade32bd8a738d7497ffe9743c46728db26740f78"],"products":[],"source":"nvd","synced_at":"2026-10-19T22:17:07.138532058+00:00"},"epss":{"cve":"CVE-2023-54006","score":0.0022,"percentile":0.12583,"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."]}