{"id":"DEBIAN-CVE-2023-54006","details":"In the Linux kernel, the following vulnerability has been resolved:  af_unix: Fix data-race around unix_tot_inflight.  unix_tot_inflight is changed under spin_lock(unix_gc_lock), but unix_release_sock() reads it locklessly.  Let's use READ_ONCE() for unix_tot_inflight.  Note that the writer side was marked by commit 9d6d7f1cb67c (\"af_unix: annote lockless accesses to unix_tot_inflight & gc_in_progress\")  BUG: KCSAN: data-race in unix_inflight / unix_release_sock  write (marked) to 0xffffffff871852b8 of 4 bytes by task 123 on cpu 1:  unix_inflight+0x130/0x180 net/unix/scm.c:64  unix_attach_fds+0x137/0x1b0 net/unix/scm.c:123  unix_scm_to_skb net/unix/af_unix.c:1832 [inline]  unix_dgram_sendmsg+0x46a/0x14f0 net/unix/af_unix.c:1955  sock_sendmsg_nosec net/socket.c:724 [inline]  sock_sendmsg+0x148/0x160 net/socket.c:747  ____sys_sendmsg+0x4e4/0x610 net/socket.c:2493  ___sys_sendmsg+0xc6/0x140 net/socket.c:2547  __sys_sendmsg+0x94/0x140 net/socket.c:2576  __do_sys_sendmsg net/socket.c:2585 [inline]  __se_sys_sendmsg net/socket.c:2583 [inline]  __x64_sys_sendmsg+0x45/0x50 net/socket.c:2583  do_syscall_x64 arch/x86/entry/common.c:50 [inline]  do_syscall_64+0x3b/0x90 arch/x86/entry/common.c:80  entry_SYSCALL_64_after_hwframe+0x72/0xdc  read to 0xffffffff871852b8 of 4 bytes by task 4891 on cpu 0:  unix_release_sock+0x608/0x910 net/unix/af_unix.c:671  unix_release+0x59/0x80 net/unix/af_unix.c:1058  __sock_release+0x7d/0x170 net/socket.c:653  sock_close+0x19/0x30 net/socket.c:1385  __fput+0x179/0x5e0 fs/file_table.c:321  ____fput+0x15/0x20 fs/file_table.c:349  task_work_run+0x116/0x1a0 kernel/task_work.c:179  resume_user_mode_work include/linux/resume_user_mode.h:49 [inline]  exit_to_user_mode_loop kernel/entry/common.c:171 [inline]  exit_to_user_mode_prepare+0x174/0x180 kernel/entry/common.c:204  __syscall_exit_to_user_mode_work kernel/entry/common.c:286 [inline]  syscall_exit_to_user_mode+0x1a/0x30 kernel/entry/common.c:297  do_syscall_64+0x4b/0x90 arch/x86/entry/common.c:86  entry_SYSCALL_64_after_hwframe+0x72/0xdc  value changed: 0x00000000 -\u003e 0x00000001  Reported by Kernel Concurrency Sanitizer on: CPU: 0 PID: 4891 Comm: systemd-coredum Not tainted 6.4.0-rc5-01219-gfa0e21fa4443 #5 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.0-0-gd239552ce722-prebuilt.qemu.org 04/01/2014","modified":"2026-09-15T08:47:29.388904255Z","published":"2025-12-24T11:15:53.527Z","upstream":["CVE-2023-54006"],"references":[{"type":"ADVISORY","url":"https://security-tracker.debian.org/tracker/CVE-2023-54006"}],"affected":[{"package":{"name":"linux","ecosystem":"Debian:12","purl":"pkg:deb/debian/linux?arch=source&distro=bookworm"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"6.1.55-1"}]}],"versions":["6.1.27-1","6.1.37-1","6.1.38-1","6.1.38-2","6.1.38-2~bpo11+1","6.1.38-3","6.1.38-4","6.1.38-4~bpo11+1","6.1.52-1","6.1.55-1~bpo11+1"],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2023-54006.json"}},{"package":{"name":"linux","ecosystem":"Debian:13","purl":"pkg:deb/debian/linux?arch=source&distro=trixie"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"6.5.6-1"}]}],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2023-54006.json"}},{"package":{"name":"linux","ecosystem":"Debian:14","purl":"pkg:deb/debian/linux?arch=source&distro=forky"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"6.5.6-1"}]}],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2023-54006.json"}}],"schema_version":"1.9.0"}