cbcvebase.
CVE-2022-50531
published 2025-10-07

CVE-2022-50531: In the Linux kernel, the following vulnerability has been resolved: tipc: fix an information leak in tipc_topsrv_kern_subscr Use a 8-byte write to initialize…

PriorityP420medium5.5CVSS 3.1
AVLACLPRLUINSUCNINAH
EPSS
0.15%
4.4th percentile
In the Linux kernel, the following vulnerability has been resolved: tipc: fix an information leak in tipc_topsrv_kern_subscr Use a 8-byte write to initialize sub.usr_handle in tipc_topsrv_kern_subscr(), otherwise four bytes remain uninitialized when issuing setsockopt(..., SOL_TIPC, ...). This resulted in an infoleak reported by KMSAN when the packet was received: BUG: KMSAN: kernel-infoleak in copyout+0xbc/0x100 lib/iov_iter.c:169 instrument_copy_to_user ./include/linux/instrumented.h:121 copyout+0xbc/0x100 lib/iov_iter.c:169 _copy_to_iter+0x5c0/0x20a0 lib/iov_iter.c:527 copy_to_iter ./include/linux/uio.h:176 simple_copy_to_iter+0x64/0xa0 net/core/datagram.c:513 __skb_datagram_iter+0x123/0xdc0 net/core/datagram.c:419 skb_copy_datagram_iter+0x58/0x200 net/core/datagram.c:527 skb_copy_datagram_msg ./include/linux/skbuff.h:3903 packet_recvmsg+0x521/0x1e70 net/packet/af_packet.c:3469 ____sys_recvmsg+0x2c4/0x810 net/socket.c:? ___sys_recvmsg+0x217/0x840 net/socket.c:2743 __sys_recvmsg net/socket.c:2773 __do_sys_recvmsg net/socket.c:2783 __se_sys_recvmsg net/socket.c:2780 __x64_sys_recvmsg+0x364/0x540 net/socket.c:2780 do_syscall_x64 arch/x86/entry/common.c:50 do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd arch/x86/entry/entry_64.S:120 ... Uninit was stored to memory at: tipc_sub_subscribe+0x42d/0xb50 net/tipc/subscr.c:156 tipc_conn_rcv_sub+0x246/0x620 net/tipc/topsrv.c:375 tipc_topsrv_kern_subscr+0x2e8/0x400 net/tipc/topsrv.c:579 tipc_group_create+0x4e7/0x7d0 net/tipc/group.c:190 tipc_sk_join+0x2a8/0x770 net/tipc/socket.c:3084 tipc_setsockopt+0xae5/0xe40 net/tipc/socket.c:3201 __sys_setsockopt+0x87f/0xdc0 net/socket.c:2252 __do_sys_setsockopt net/socket.c:2263 __se_sys_setsockopt net/socket.c:2260 __x64_sys_setsockopt+0xe0/0x160 net/socket.c:2260 do_syscall_x64 arch/x86/entry/common.c:50 do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd arch/x86/entry/entry_64.S:120 Local variab

Affected

18 ranges
VendorProductVersion rangeFixed in
debianlinux< linux 6.0.6-1 (bookworm)linux 6.0.6-1 (bookworm)
linuxlinux——
linuxlinux>= 026321c6d056a54b4145522492245d2b5913ee1d < 3d1b83ff7b6575a4e41283203e6b2e25ea700cd73d1b83ff7b6575a4e41283203e6b2e25ea700cd7
linuxlinux>= 026321c6d056a54b4145522492245d2b5913ee1d < 567f8de358b61015dcfb8878a1f06c5369a45f54567f8de358b61015dcfb8878a1f06c5369a45f54
linuxlinux>= 026321c6d056a54b4145522492245d2b5913ee1d < e558e148938442dd49628cd7ef61c360832bef31e558e148938442dd49628cd7ef61c360832bef31
linuxlinux>= 026321c6d056a54b4145522492245d2b5913ee1d < dbc01c0a4e202a7e925dad1d4b7c1d6eb0c81154dbc01c0a4e202a7e925dad1d4b7c1d6eb0c81154
linuxlinux>= 026321c6d056a54b4145522492245d2b5913ee1d < fef70f978bc289642501d88d2a3f5e841bd31a67fef70f978bc289642501d88d2a3f5e841bd31a67
linuxlinux>= 026321c6d056a54b4145522492245d2b5913ee1d < 777ecaabd614d47c482a5c9031579e66da13989a777ecaabd614d47c482a5c9031579e66da13989a
linuxlinux_kernel——
linuxlinux_kernel>= 0 < 5.10.158-15.10.158-1
linuxlinux_kernel>= 0 < 6.0.6-16.0.6-1
linuxlinux_kernel>= 0 < 6.0.6-16.0.6-1
linuxlinux_kernel>= 0 < 6.0.6-16.0.6-1
linuxlinux_kernel>= 4.17 < 4.19.2644.19.264
linuxlinux_kernel>= 4.20 < 5.4.2215.4.221
linuxlinux_kernel>= 5.11 < 5.15.765.15.76
linuxlinux_kernel>= 5.16 < 6.0.66.0.6
linuxlinux_kernel>= 5.5 < 5.10.1525.10.152

CVSS provenance

nvdv3.15.5MEDIUMCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
osv5.5MEDIUM
vendor_debian5.5MEDIUM
vendor_redhat5.5MEDIUM
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