Bug 2405741 (CVE-2023-53717)

Summary: CVE-2023-53717 kernel: wifi: ath9k: Fix potential stack-out-of-bounds write in ath9k_wmi_rsp_callback()
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security DevOps Team <prodsec-dev>
Status: NEW --- QA Contact:
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Priority: medium    
Version: unspecifiedCC: rhel-process-autobot, watson-tool-maintainers
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Hardware: All   
OS: Linux   
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Description OSIDB Bzimport 2025-10-22 14:03:41 UTC 
In the Linux kernel, the following vulnerability has been resolved:

wifi: ath9k: Fix potential stack-out-of-bounds write in ath9k_wmi_rsp_callback()

Fix a stack-out-of-bounds write that occurs in a WMI response callback
function that is called after a timeout occurs in ath9k_wmi_cmd().
The callback writes to wmi->cmd_rsp_buf, a stack-allocated buffer that
could no longer be valid when a timeout occurs. Set wmi->last_seq_id to
0 when a timeout occurred.

Found by a modified version of syzkaller.

BUG: KASAN: stack-out-of-bounds in ath9k_wmi_ctrl_rx
Write of size 4
Call Trace:
 memcpy
 ath9k_wmi_ctrl_rx
 ath9k_htc_rx_msg
 ath9k_hif_usb_reg_in_cb
 __usb_hcd_giveback_urb
 usb_hcd_giveback_urb
 dummy_timer
 call_timer_fn
 run_timer_softirq
 __do_softirq
 irq_exit_rcu
 sysvec_apic_timer_interrupt
Comment 1 Jon Moroney 2025-10-22 17:24:38 UTC 
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2025102214-CVE-2023-53717-e88c@gregkh/T