CVE-2025-39760 usb: core: config: Prevent OOB read in SS endpoint companion parsing
A local attacker can trigger an out-of-bounds read in the Linux kernel USB subsystem, potentially leaking memory or causing a crash.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2025-39760?
CVE-2025-39760 is a high-severity memory corruption vulnerability in Debian Debian Linux, published on 11 Sep 2025. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
In the Linux kernel, the following vulnerability has been resolved:
usb: core: config: Prevent OOB read in SS endpoint companion parsing
usb_parse_ss_endpoint_companion() checks descriptor type before length, enabling a potentially odd read outside of the buffer size.
Fix this up by checking the size first before looking at any of the fields in the descriptor.
Weakness: CWE-125
Which versions are affected by CVE-2025-39760?
It affects 2 products.
Products include Debian Debian Linux, Linux kernel.
How do I fix CVE-2025-39760?
Apply the vendor's patch.
Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.
Is CVE-2025-39760 being exploited?
There is no known exploitation of CVE-2025-39760 in the wild and no public exploit code.
Other vulnerabilities in Debian Debian Linux
Sources
Also known as AZL-67154, AZL-75110, BELL-CVE-2025-39760, DEBIAN-CVE-2025-39760, GHSA-qjjr-vrx2-c9cp, ROOT-OS-DEBIAN-11-CVE-2025-39760 and 3 more.