CVE-2026-80604 HID: core: Fix OOB read in hid_get_report for numbered reports
An out-of-bounds read in the Linux kernel HID subsystem allows attackers to cause a kernel panic or leak memory via crafted numbered reports.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-80604?
CVE-2026-80604 is a high-severity memory corruption vulnerability in Linux, published on 28 Aug 2026. 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: core: Fix OOB read in hid_get_report for numbered reports
When a caller passes a size of 0 to hid_report_raw_event() for a numbered report, the function originally called hid_get_report() before performing any size validation.
Inside hid_get_report(), if the report is numbered (report_enum->numbered is true), it unconditionally dereferences data[0] to extract the report ID. With a size of 0, this results in an out-of-bounds read or kernel panic.
Fix this by moving the numbered report size validation check before the call to hid_get_report(), ensuring that size is at least 1 before dereferencing the data pointer.
Which versions are affected by CVE-2026-80604?
How do I fix CVE-2026-80604?
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-2026-80604 being exploited?
There is no known exploitation of CVE-2026-80604 in the wild and no public exploit code.
Sources
Also known as BELL-CVE-2026-80604, DEBIAN-CVE-2026-80604, GHSA-9mrq-m3fm-3h9w, UBUNTU-CVE-2026-80604.