cbcvebase.
CVE-2023-52772
published 2024-05-21

CVE-2023-52772: In the Linux kernel, the following vulnerability has been resolved: af_unix: fix use-after-free in unix_stream_read_actor() syzbot reported the following crash…

PriorityP339high7.8CVSS 3.1
AVLACLPRLUINSUCHIHAH
EPSS
0.24%
15.4th percentile
In the Linux kernel, the following vulnerability has been resolved: af_unix: fix use-after-free in unix_stream_read_actor() syzbot reported the following crash [1] After releasing unix socket lock, u->oob_skb can be changed by another thread. We must temporarily increase skb refcount to make sure this other thread will not free the skb under us. [1] BUG: KASAN: slab-use-after-free in unix_stream_read_actor+0xa7/0xc0 net/unix/af_unix.c:2866 Read of size 4 at addr ffff88801f3b9cc4 by task syz-executor107/5297 CPU: 1 PID: 5297 Comm: syz-executor107 Not tainted 6.6.0-syzkaller-15910-gb8e3a87a627b #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/09/2023 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0xd9/0x1b0 lib/dump_stack.c:106 print_address_description mm/kasan/report.c:364 [inline] print_report+0xc4/0x620 mm/kasan/report.c:475 kasan_report+0xda/0x110 mm/kasan/report.c:588 unix_stream_read_actor+0xa7/0xc0 net/unix/af_unix.c:2866 unix_stream_recv_urg net/unix/af_unix.c:2587 [inline] unix_stream_read_generic+0x19a5/0x2480 net/unix/af_unix.c:2666 unix_stream_recvmsg+0x189/0x1b0 net/unix/af_unix.c:2903 sock_recvmsg_nosec net/socket.c:1044 [inline] sock_recvmsg+0xe2/0x170 net/socket.c:1066 ____sys_recvmsg+0x21f/0x5c0 net/socket.c:2803 ___sys_recvmsg+0x115/0x1a0 net/socket.c:2845 __sys_recvmsg+0x114/0x1e0 net/socket.c:2875 do_syscall_x64 arch/x86/entry/common.c:51 [inline] do_syscall_64+0x3f/0x110 arch/x86/entry/common.c:82 entry_SYSCALL_64_after_hwframe+0x63/0x6b RIP: 0033:0x7fc67492c559 Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 51 18 00 00 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b0 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007fc6748ab228 EFLAGS: 00000246 ORIG_RAX: 000000000000002f RAX: ffffffffffffffda RBX: 000000000000001c RCX: 00007fc67492c559 RDX: 0000000040010083 RSI: 0000000020000140 RDI: 0000000000000004 RBP: 00007fc6749b6348 R08: 000

Affected

14 ranges
VendorProductVersion rangeFixed in
debianlinux< linux 6.1.64-1 (bookworm)linux 6.1.64-1 (bookworm)
linuxlinux——
linuxlinux>= 876c14ad014d0e39c57cbfde53e13d17cdb6d645 < 75bcfc188abf4fae9c1d5f5dc0a03540be602eef75bcfc188abf4fae9c1d5f5dc0a03540be602eef
linuxlinux>= 876c14ad014d0e39c57cbfde53e13d17cdb6d645 < d179189eec426fe4801e4b91efa1889faed12700d179189eec426fe4801e4b91efa1889faed12700
linuxlinux>= 876c14ad014d0e39c57cbfde53e13d17cdb6d645 < eae0b295ce16d8c8b4114c3037993191b4bb92f0eae0b295ce16d8c8b4114c3037993191b4bb92f0
linuxlinux>= 876c14ad014d0e39c57cbfde53e13d17cdb6d645 < 069a3ec329ff43e7869a3d94c62cd03203016bce069a3ec329ff43e7869a3d94c62cd03203016bce
linuxlinux>= 876c14ad014d0e39c57cbfde53e13d17cdb6d645 < 4b7b492615cf3017190f55444f7016812b66611d4b7b492615cf3017190f55444f7016812b66611d
linuxlinux_kernel>= 0 < 6.1.64-16.1.64-1
linuxlinux_kernel>= 0 < 6.6.8-16.6.8-1
linuxlinux_kernel>= 0 < 6.6.8-16.6.8-1
linuxlinux_kernel>= 5.15 < 5.15.1405.15.140
linuxlinux_kernel>= 5.16 < 6.1.646.1.64
linuxlinux_kernel>= 6.2 < 6.5.136.5.13
linuxlinux_kernel>= 6.6 < 6.6.36.6.3

CVSS provenance

nvdv3.17.8HIGHCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
osv7.8HIGH
vendor_debian7.8HIGH
vendor_redhat7.8HIGH
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