cbcvebase.
CVE-2024-38596
published 2024-06-19

CVE-2024-38596: In the Linux kernel, the following vulnerability has been resolved: af_unix: Fix data races in unix_release_sock/unix_stream_sendmsg A data-race condition has…

PriorityP418medium4.7CVSS 3.1
AVLACHPRLUINSUCNINAH
EPSS
0.19%
8.5th percentile
In the Linux kernel, the following vulnerability has been resolved: af_unix: Fix data races in unix_release_sock/unix_stream_sendmsg A data-race condition has been identified in af_unix. In one data path, the write function unix_release_sock() atomically writes to sk->sk_shutdown using WRITE_ONCE. However, on the reader side, unix_stream_sendmsg() does not read it atomically. Consequently, this issue is causing the following KCSAN splat to occur: BUG: KCSAN: data-race in unix_release_sock / unix_stream_sendmsg write (marked) to 0xffff88867256ddbb of 1 bytes by task 7270 on cpu 28: unix_release_sock (net/unix/af_unix.c:640) unix_release (net/unix/af_unix.c:1050) sock_close (net/socket.c:659 net/socket.c:1421) __fput (fs/file_table.c:422) __fput_sync (fs/file_table.c:508) __se_sys_close (fs/open.c:1559 fs/open.c:1541) __x64_sys_close (fs/open.c:1541) x64_sys_call (arch/x86/entry/syscall_64.c:33) do_syscall_64 (arch/x86/entry/common.c:?) entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) read to 0xffff88867256ddbb of 1 bytes by task 989 on cpu 14: unix_stream_sendmsg (net/unix/af_unix.c:2273) __sock_sendmsg (net/socket.c:730 net/socket.c:745) ____sys_sendmsg (net/socket.c:2584) __sys_sendmmsg (net/socket.c:2638 net/socket.c:2724) __x64_sys_sendmmsg (net/socket.c:2753 net/socket.c:2750 net/socket.c:2750) x64_sys_call (arch/x86/entry/syscall_64.c:33) do_syscall_64 (arch/x86/entry/common.c:?) entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) value changed: 0x01 -> 0x03 The line numbers are related to commit dd5a440a31fa ("Linux 6.9-rc7"). Commit e1d09c2c2f57 ("af_unix: Fix data races around sk->sk_shutdown.") addressed a comparable issue in the past regarding sk->sk_shutdown. However, it overlooked resolving this particular data path. This patch only offending unix_stream_sendmsg() function, since the other reads seem to be protected by unix_state_lock() as discussed in

Affected

28 ranges· showing 25
VendorProductVersion rangeFixed in
debianlinux< linux 6.1.94-1 (bookworm)linux 6.1.94-1 (bookworm)
linuxlinux
linuxlinux>= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < fca6072e1a7b1e709ada5604b951513b89b4bd0afca6072e1a7b1e709ada5604b951513b89b4bd0a
linuxlinux>= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < de6641d213373fbde9bbdd7c4b552254bc9f82fede6641d213373fbde9bbdd7c4b552254bc9f82fe
linuxlinux>= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 4d51845d734a4c5d079e56e0916f936a55e150554d51845d734a4c5d079e56e0916f936a55e15055
linuxlinux>= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 9aa8773abfa0e954136875b4cbf2df4cf638e8a59aa8773abfa0e954136875b4cbf2df4cf638e8a5
linuxlinux>= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 8299e4d778f664b31b67cf4cf3d5409de2ecb92c8299e4d778f664b31b67cf4cf3d5409de2ecb92c
linuxlinux>= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 0688d4e499bee3f2749bca27329bd128686230cb0688d4e499bee3f2749bca27329bd128686230cb
linuxlinux>= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < a4c88072abcaca593cefe70f90e9d3707526e8f9a4c88072abcaca593cefe70f90e9d3707526e8f9
linuxlinux>= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < a52fa2addfcccc2c5a0217fd45562605088c018ba52fa2addfcccc2c5a0217fd45562605088c018b
linuxlinux>= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 540bf24fba16b88c1b3b9353927204b4f1074e25540bf24fba16b88c1b3b9353927204b4f1074e25
linuxlinux_kernel
linuxlinux_kernel>= 0 < 5.10.221-15.10.221-1
linuxlinux_kernel>= 0 < 6.1.94-16.1.94-1
linuxlinux_kernel>= 0 < 6.8.12-16.8.12-1
linuxlinux_kernel>= 0 < 6.8.12-16.8.12-1
linuxlinux_kernel>= 0 < 5.4.0-192.2125.4.0-192.212
linuxlinux_kernel>= 0 < 5.15.0-121.1315.15.0-121.131
linuxlinux_kernel>= 0 < 6.8.0-40.406.8.0-40.40
linuxlinux_kernel>= 0 < 4.15.0-231.2434.15.0-231.243
linuxlinux_kernel>= 2.6.13 < 4.19.3164.19.316
linuxlinux_kernel>= 4.20 < 5.4.2785.4.278
linuxlinux_kernel>= 5.11 < 5.15.1615.15.161
linuxlinux_kernel>= 5.16 < 6.1.936.1.93
linuxlinux_kernel>= 5.5 < 5.10.2195.10.219

CVSS provenance

nvdv3.14.7MEDIUMCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H
osv7.8HIGH
vendor_ubuntu7.8HIGH
vendor_debian4.7MEDIUM
vendor_redhat4.7MEDIUM
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