CVE - CVE-2024-38596

CVE-ID
CVE-2024-38596	Learn more at National Vulnerability Database (NVD) • CVSS Severity Rating • Fix Information • Vulnerable Software Versions • SCAP Mappings • CPE Information
Description
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
References
Note: References are provided for the convenience of the reader to help distinguish between vulnerabilities. The list is not intended to be complete.
MISC:https://git.kernel.org/stable/c/0688d4e499bee3f2749bca27329bd128686230cb URL:https://git.kernel.org/stable/c/0688d4e499bee3f2749bca27329bd128686230cb MISC:https://git.kernel.org/stable/c/4d51845d734a4c5d079e56e0916f936a55e15055 URL:https://git.kernel.org/stable/c/4d51845d734a4c5d079e56e0916f936a55e15055 MISC:https://git.kernel.org/stable/c/540bf24fba16b88c1b3b9353927204b4f1074e25 URL:https://git.kernel.org/stable/c/540bf24fba16b88c1b3b9353927204b4f1074e25 MISC:https://git.kernel.org/stable/c/8299e4d778f664b31b67cf4cf3d5409de2ecb92c URL:https://git.kernel.org/stable/c/8299e4d778f664b31b67cf4cf3d5409de2ecb92c MISC:https://git.kernel.org/stable/c/9aa8773abfa0e954136875b4cbf2df4cf638e8a5 URL:https://git.kernel.org/stable/c/9aa8773abfa0e954136875b4cbf2df4cf638e8a5 MISC:https://git.kernel.org/stable/c/a4c88072abcaca593cefe70f90e9d3707526e8f9 URL:https://git.kernel.org/stable/c/a4c88072abcaca593cefe70f90e9d3707526e8f9 MISC:https://git.kernel.org/stable/c/a52fa2addfcccc2c5a0217fd45562605088c018b URL:https://git.kernel.org/stable/c/a52fa2addfcccc2c5a0217fd45562605088c018b MISC:https://git.kernel.org/stable/c/de6641d213373fbde9bbdd7c4b552254bc9f82fe URL:https://git.kernel.org/stable/c/de6641d213373fbde9bbdd7c4b552254bc9f82fe MISC:https://git.kernel.org/stable/c/fca6072e1a7b1e709ada5604b951513b89b4bd0a URL:https://git.kernel.org/stable/c/fca6072e1a7b1e709ada5604b951513b89b4bd0a
Assigning CNA
kernel.org
Date Record Created
20240618	Disclaimer: The record creation date may reflect when the CVE ID was allocated or reserved, and does not necessarily indicate when this vulnerability was discovered, shared with the affected vendor, publicly disclosed, or updated in CVE.
Phase (Legacy)
Assigned (20240618)
Votes (Legacy)

Comments (Legacy)

Proposed (Legacy)
N/A
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