CVE-2023-53121None▾ SunlitIn 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() …
▾ Sunlit zone — Low / medium · no exploitation signal
impact 2.8 · likelihood 0 · exploitation 0
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Stakeholder-Specific Vulnerability Categorization from CISA's ADP record at CVE.org: whether exploitation is observed, whether an attack can be automated, and how much of the system is at stake.
Exploit-prediction probability, daily snapshots since Nov 5.
Disclosure to exploitation, from the record and what we observed since indexing it.
Disclosed via CVEORG
Last analysed / modified upstream
0.2%
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:
<TASK>
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.
Linux >= 8336886f786fdacbc19b719c1f7ea91eb70706d4 < d493d4fe88195a144d6a277a90062a7534ed2192Linux >= 8336886f786fdacbc19b719c1f7ea91eb70706d4 < e23ca307745be3df7fe9762f3e2a7e311a57852eLinux >= 8336886f786fdacbc19b719c1f7ea91eb70706d4 < 442aa78ed70188b21ccd8669738448702c0a3281Linux >= 8336886f786fdacbc19b719c1f7ea91eb70706d4 < 77ad58bca0119e8cc3e0e9d91a3f22caa66e4dfaLinux >= 8336886f786fdacbc19b719c1f7ea91eb70706d4 < ad07290d63ff6689f50565b02f5b6f34ec15a5caLinux >= 8336886f786fdacbc19b719c1f7ea91eb70706d4 < 9180aa4622a720b433e842b4d3aa34d73eec577aLinux >= 8336886f786fdacbc19b719c1f7ea91eb70706d4 < 7613cde8c0c1f02a7ec2e1d536c01b65b135fc1cLinux >= 8336886f786fdacbc19b719c1f7ea91eb70706d4 < bced3f7db95ff2e6ca29dc4d1c9751ab5e736a09Linux 3.7Refer to the linked advisories for vendor-supplied fixes and affected version ranges.
Connected by shared product, vendor, weakness, or advisory.
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