cbcvebase.
CVE-2023-53121
published 2025-05-02

CVE-2023-53121: In the Linux kernel, the following vulnerability has been resolved: tcp: tcp_make_synack() can be called from process context tcp_rtx_synack() now could be…

PriorityP420medium5.5CVSS 3.1
AVLACLPRLUINSUCNINAH
EPSS
0.18%
7.4th percentile
In the Linux kernel, the following vulnerability has been resolved: tcp: tcp_make_synack() can be called from process context tcp_rtx_synack() now could be called in process context as explained in 0a375c822497 ("tcp: tcp_rtx_synack() can be called from process context"). tcp_rtx_synack() might call tcp_make_synack(), which will touch per-CPU variables with preemption enabled. This causes the following BUG: BUG: using __this_cpu_add() in preemptible [00000000] code: ThriftIO1/5464 caller is tcp_make_synack+0x841/0xac0 Call Trace: dump_stack_lvl+0x10d/0x1a0 check_preemption_disabled+0x104/0x110 tcp_make_synack+0x841/0xac0 tcp_v6_send_synack+0x5c/0x450 tcp_rtx_synack+0xeb/0x1f0 inet_rtx_syn_ack+0x34/0x60 tcp_check_req+0x3af/0x9e0 tcp_rcv_state_process+0x59b/0x2030 tcp_v6_do_rcv+0x5f5/0x700 release_sock+0x3a/0xf0 tcp_sendmsg+0x33/0x40 ____sys_sendmsg+0x2f2/0x490 __sys_sendmsg+0x184/0x230 do_syscall_64+0x3d/0x90 Avoid calling __TCP_INC_STATS() with will touch per-cpu variables. Use TCP_INC_STATS() which is safe to be called from context switch.

Affected

22 ranges
VendorProductVersion rangeFixed in
debianlinux< linux 6.1.25-1 (bookworm)linux 6.1.25-1 (bookworm)
linuxlinux——
linuxlinux>= 8336886f786fdacbc19b719c1f7ea91eb70706d4 < d493d4fe88195a144d6a277a90062a7534ed2192d493d4fe88195a144d6a277a90062a7534ed2192
linuxlinux>= 8336886f786fdacbc19b719c1f7ea91eb70706d4 < e23ca307745be3df7fe9762f3e2a7e311a57852ee23ca307745be3df7fe9762f3e2a7e311a57852e
linuxlinux>= 8336886f786fdacbc19b719c1f7ea91eb70706d4 < 442aa78ed70188b21ccd8669738448702c0a3281442aa78ed70188b21ccd8669738448702c0a3281
linuxlinux>= 8336886f786fdacbc19b719c1f7ea91eb70706d4 < 77ad58bca0119e8cc3e0e9d91a3f22caa66e4dfa77ad58bca0119e8cc3e0e9d91a3f22caa66e4dfa
linuxlinux>= 8336886f786fdacbc19b719c1f7ea91eb70706d4 < ad07290d63ff6689f50565b02f5b6f34ec15a5caad07290d63ff6689f50565b02f5b6f34ec15a5ca
linuxlinux>= 8336886f786fdacbc19b719c1f7ea91eb70706d4 < 9180aa4622a720b433e842b4d3aa34d73eec577a9180aa4622a720b433e842b4d3aa34d73eec577a
linuxlinux>= 8336886f786fdacbc19b719c1f7ea91eb70706d4 < 7613cde8c0c1f02a7ec2e1d536c01b65b135fc1c7613cde8c0c1f02a7ec2e1d536c01b65b135fc1c
linuxlinux>= 8336886f786fdacbc19b719c1f7ea91eb70706d4 < bced3f7db95ff2e6ca29dc4d1c9751ab5e736a09bced3f7db95ff2e6ca29dc4d1c9751ab5e736a09
linuxlinux_kernel——
linuxlinux_kernel>= 0 < 5.10.178-15.10.178-1
linuxlinux_kernel>= 0 < 6.1.25-16.1.25-1
linuxlinux_kernel>= 0 < 6.1.25-16.1.25-1
linuxlinux_kernel>= 0 < 6.1.25-16.1.25-1
linuxlinux_kernel>= 3.7 < 4.14.3114.14.311
linuxlinux_kernel>= 4.15 < 4.19.2794.19.279
linuxlinux_kernel>= 4.20 < 5.4.2385.4.238
linuxlinux_kernel>= 5.11 < 5.15.1045.15.104
linuxlinux_kernel>= 5.16 < 6.1.216.1.21
linuxlinux_kernel>= 5.5 < 5.10.1765.10.176
linuxlinux_kernel>= 6.2 < 6.2.86.2.8

CVSS provenance

nvdv3.15.5MEDIUMCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
osv5.5MEDIUM
vendor_debian5.5MEDIUM
vendor_redhat5.5MEDIUM
Stop checking back — get the weekly exploitation signal.

Every Monday: what got weaponized or added to CISA KEV in the last seven days — each CVE cross-linked to its PoC, Nuclei template, and detection rule. Free, one email a week, unsubscribe in one click.