CVE-2023-53345

published 2025-09-17

CVE-2023-53345: In the Linux kernel, the following vulnerability has been resolved: rxrpc: Fix potential data race in rxrpc_wait_to_be_connected() Inside the loop in…

Priority P4 17 medium 4.7 CVSS 3.1

AV L AC H PR L UI N S U C N I N A H

In the Linux kernel, the following vulnerability has been resolved:

rxrpc: Fix potential data race in rxrpc_wait_to_be_connected()

Inside the loop in rxrpc_wait_to_be_connected() it checks call->error to
see if it should exit the loop without first checking the call state. This
is probably safe as if call->error is set, the call is dead anyway, but we
should probably wait for the call state to have been set to completion
first, lest it cause surprise on the way out.

Fix this by only accessing call->error if the call is complete. We don't
actually need to access the error inside the loop as we'll do that after.

This caused the following report:

BUG: KCSAN: data-race in rxrpc_send_data / rxrpc_set_call_completion

write to 0xffff888159cf3c50 of 4 bytes by task 25673 on cpu 1:
rxrpc_set_call_completion+0x71/0x1c0 net/rxrpc/call_state.c:22
rxrpc_send_data_packet+0xba9/0x1650 net/rxrpc/output.c:479
rxrpc_transmit_one+0x1e/0x130 net/rxrpc/output.c:714
rxrpc_decant_prepared_tx net/rxrpc/call_event.c:326 [inline]
rxrpc_transmit_some_data+0x496/0x600 net/rxrpc/call_event.c:350
rxrpc_input_call_event+0x564/0x1220 net/rxrpc/call_event.c:464
rxrpc_io_thread+0x307/0x1d80 net/rxrpc/io_thread.c:461
kthread+0x1ac/0x1e0 kernel/kthread.c:376
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308

read to 0xffff888159cf3c50 of 4 bytes by task 25672 on cpu 0:
rxrpc_send_data+0x29e/0x1950 net/rxrpc/sendmsg.c:296
rxrpc_do_sendmsg+0xb7a/0xc20 net/rxrpc/sendmsg.c:726
rxrpc_sendmsg+0x413/0x520 net/rxrpc/af_rxrpc.c:565
sock_sendmsg_nosec net/socket.c:724 [inline]
sock_sendmsg net/socket.c:747 [inline]
____sys_sendmsg+0x375/0x4c0 net/socket.c:2501
___sys_sendmsg net/socket.c:2555 [inline]
__sys_sendmmsg+0x263/0x500 net/socket.c:2641
__do_sys_sendmmsg net/socket.c:2670 [inline]
__se_sys_sendmmsg net/socket.c:2667 [inline]
__x64_sys_sendmmsg+0x57/0x60 net/socket.c:2667
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x41/0xc0 arch/x86/entry/common.c:80
entry_SYSCALL_64_afte

Affected

10 ranges

Vendor	Product	Version range	Fixed in
debian	linux	< linux 6.3.7-1 (forky)	linux 6.3.7-1 (forky)
linux	linux	—	—
linux	linux	>= 9d35d880e0e4a3ab32d8c12f9e4d76198aadd42d < 3e8ba61a3fe4475a9b5c9fbfc664435c6795d872	3e8ba61a3fe4475a9b5c9fbfc664435c6795d872
linux	linux	>= 9d35d880e0e4a3ab32d8c12f9e4d76198aadd42d < 454e48a9ff04c5fa1631bb172070fcb6389b97f9	454e48a9ff04c5fa1631bb172070fcb6389b97f9
linux	linux	>= 9d35d880e0e4a3ab32d8c12f9e4d76198aadd42d < 2b5fdc0f5caa505afe34d608e2eefadadf2ee67a	2b5fdc0f5caa505afe34d608e2eefadadf2ee67a
linux	linux_kernel	—	—
linux	linux_kernel	>= 0 < 6.3.7-1	6.3.7-1
linux	linux_kernel	>= 0 < 6.3.7-1	6.3.7-1
linux	linux_kernel	>= 6.2.1 < 6.2.16	6.2.16
linux	linux_kernel	>= 6.3 < 6.3.3	6.3.3

CVSS provenance

nvd v3.1 4.7 MEDIUM CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H

osv 4.7 MEDIUM

vendor_debian 4.7 LOW

vendor_redhat 4.7 MEDIUM

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CWE-362