CVE-2024-25741

What it actually does

printer_write in f_printer.c fails to properly invoke usb_ep_queue, leaving USB endpoint requests unqueued or mishandled and enabling denial of service or further unspecified kernel impact.

Why it matters to the business

Linux systems exposing USB gadget printer functionality may experience crashes or instability; the issue is nearly two years old with negligible exploit probability and no ransomware linkage, limiting operational urgency.

How an attack unfolds

An attacker with local or USB access crafts input to the printer_write path that triggers the missing usb_ep_queue call, resulting in resource mishandling that can crash the kernel or enable further abuse; listed threat actor references appear generic and do not indicate confirmed exploitation of this specific flaw.

How to fix it

Update the Linux kernel to a version containing the corrected printer_write logic; monitor vendor advisories for backported fixes since no fixed versions were supplied in the source data.

How to confirm the fix worked

Confirm kernel version is newer than 6.7.4 and inspect f_printer.c for proper usb_ep_queue invocation with error checking; test USB gadget printer functionality under load to verify stability.

Typical attack path

1. Obtain local access or attach to a USB gadget interface exposing the printer function
2. Trigger printer_write with crafted data or timing that bypasses proper usb_ep_queue handling
3. Cause kernel resource exhaustion or fault leading to denial of service

How to detect it

Review kernel logs for USB gadget or f_printer related faults around the time of suspected issues; no confirmed exploitation artifacts are known for this CVE.

What your security team should do

• Prioritize kernel updates on any systems using USB gadget printer mode
• Disable USB gadget functionality where not required to reduce attack surface
• Monitor EPSS and KEV status for future changes given the low current scores