CVE-2023-54006 in Linux
Riassunto
di VulDB • 30/06/2026
Nel kernel Linux è stata risolta la seguente vulnerabilità:
af_unix: Correzione di una data-race su unix_tot_inflight.
unix_tot_inflight viene modificato sotto spin_lock(unix_gc_lock), ma unix_release_sock() lo legge in modalità lockless (senza blocco).
Si utilizza READ_ONCE() per unix_tot_inflight.
Nota che il lato writer era stato contrassegnato dal 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 (contrassegnata) a 0xffffffff871852b8 di 4 byte da task 123 su 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 a 0xffffffff871852b8 di 4 byte da task 4891 su 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
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