CVE-2025-38103 HID: usbhid: Eliminate recurrent out-of-bounds bug in usbhid_parse()
A local attacker with physical access can trigger an out-of-bounds read in the Linux kernel's USB HID driver, potentially causing a crash or code execution.
- 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-2025-38103?
CVE-2025-38103 is a high-severity memory corruption vulnerability in Debian Debian Linux, published on 3 Jul 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:
HID: usbhid: Eliminate recurrent out-of-bounds bug in usbhid_parse()
Update struct hid_descriptor to better reflect the mandatory and optional parts of the HID Descriptor as per USB HID 1.11 specification. Note: the kernel currently does not parse any optional HID class descriptors, only the mandatory report descriptor.
Update all references to member element desc[0] to rpt_desc.
Add test to verify bLength and bNumDescriptors values are valid.
Replace the for loop with direct access to the mandatory HID class descriptor member for the report descriptor. This eliminates the possibility of getting an out-of-bounds fault.
Add a warning message if the HID descriptor contains any unsupported optional HID class descriptors.
Weakness: CWE-125
Which versions are affected by CVE-2025-38103?
It affects 2 products.
Products include Debian Debian Linux, Linux kernel.
How do I fix CVE-2025-38103?
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-2025-38103 being exploited?
There is no known exploitation of CVE-2025-38103 in the wild and no public exploit code.
Other vulnerabilities in Debian Debian Linux
Sources
Also known as AZL-64610, BELL-CVE-2025-38103, DEBIAN-CVE-2025-38103, GHSA-8xp3-mcw7-w7cp, ROOT-OS-DEBIAN-11-CVE-2025-38103, ROOT-OS-DEBIAN-12-CVE-2025-38103 and 3 more.