{"id":"DEBIAN-CVE-2023-53204","details":"In the Linux kernel, the following vulnerability has been resolved:  af_unix: Fix data-races around user-\u003eunix_inflight.  user-\u003eunix_inflight is changed under spin_lock(unix_gc_lock), but too_many_unix_fds() reads it locklessly.  Let's annotate the write/read accesses to user-\u003eunix_inflight.  BUG: KCSAN: data-race in unix_attach_fds / unix_inflight  write to 0xffffffff8546f2d0 of 8 bytes by task 44798 on cpu 1:  unix_inflight+0x157/0x180 net/unix/scm.c:66  unix_attach_fds+0x147/0x1e0 net/unix/scm.c:123  unix_scm_to_skb net/unix/af_unix.c:1827 [inline]  unix_dgram_sendmsg+0x46a/0x14f0 net/unix/af_unix.c:1950  unix_seqpacket_sendmsg net/unix/af_unix.c:2308 [inline]  unix_seqpacket_sendmsg+0xba/0x130 net/unix/af_unix.c:2292  sock_sendmsg_nosec net/socket.c:725 [inline]  sock_sendmsg+0x148/0x160 net/socket.c:748  ____sys_sendmsg+0x4e4/0x610 net/socket.c:2494  ___sys_sendmsg+0xc6/0x140 net/socket.c:2548  __sys_sendmsg+0x94/0x140 net/socket.c:2577  __do_sys_sendmsg net/socket.c:2586 [inline]  __se_sys_sendmsg net/socket.c:2584 [inline]  __x64_sys_sendmsg+0x45/0x50 net/socket.c:2584  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+0x6e/0xd8  read to 0xffffffff8546f2d0 of 8 bytes by task 44814 on cpu 0:  too_many_unix_fds net/unix/scm.c:101 [inline]  unix_attach_fds+0x54/0x1e0 net/unix/scm.c:110  unix_scm_to_skb net/unix/af_unix.c:1827 [inline]  unix_dgram_sendmsg+0x46a/0x14f0 net/unix/af_unix.c:1950  unix_seqpacket_sendmsg net/unix/af_unix.c:2308 [inline]  unix_seqpacket_sendmsg+0xba/0x130 net/unix/af_unix.c:2292  sock_sendmsg_nosec net/socket.c:725 [inline]  sock_sendmsg+0x148/0x160 net/socket.c:748  ____sys_sendmsg+0x4e4/0x610 net/socket.c:2494  ___sys_sendmsg+0xc6/0x140 net/socket.c:2548  __sys_sendmsg+0x94/0x140 net/socket.c:2577  __do_sys_sendmsg net/socket.c:2586 [inline]  __se_sys_sendmsg net/socket.c:2584 [inline]  __x64_sys_sendmsg+0x45/0x50 net/socket.c:2584  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+0x6e/0xd8  value changed: 0x000000000000000c -\u003e 0x000000000000000d  Reported by Kernel Concurrency Sanitizer on: CPU: 0 PID: 44814 Comm: systemd-coredum Not tainted 6.4.0-11989-g6843306689af #6 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.0-0-gd239552ce722-prebuilt.qemu.org 04/01/2014","modified":"2026-09-15T09:03:02.521730296Z","published":"2025-09-15T15:15:46.847Z","upstream":["CVE-2023-53204"],"references":[{"type":"ADVISORY","url":"https://security-tracker.debian.org/tracker/CVE-2023-53204"}],"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-2023-53204.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-2023-53204.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-2023-53204.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H"}]}