# CVE-2023-53345: linux: In the Linux kernel, the following vulnerability has been resolved:  rxrpc: Fix potential data race in rxrpc_wait_to_...

CVE-2023-53345 is fixed in linux on 1 platform, first by DEBIAN-CVE-2023-53345, released September 17, 2025. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2023-53345
- Priority: Routine
- CVSS: 4.7 (medium)
- EPSS: 0.0014
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Sep 17, 2025

## Description

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_after_hwframe+0x63/0xcd      value changed: 0x00000000 -> 0xffffffea

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | linux Debian 13.5 (trixie) | 6.3.7-1 | [DEBIAN-CVE-2023-53345](https://patchblox.com/security/data/fix/linux/debian-cve-2023-53345.md) | Sep 17, 2025 |
| Linux | linux Debian 14 | 6.3.7-1 | [DEBIAN-CVE-2023-53345](https://patchblox.com/security/data/fix/linux/debian-cve-2023-53345.md) | Sep 17, 2025 |

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Data as of 2026-11-08T00:53:09Z UTC. Source: Patchblox Patch Radar (https://patchblox.com/security/patch-radar). Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

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