CVE-2026-80605 HID: picolcd: prevent NULL pointer dereference in picolcd_send_and_wait()
A local attacker with access to the picolcd HID device can trigger a kernel crash via integer overflow leading to NULL pointer dereference.
- 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-2026-80605?
CVE-2026-80605 is a 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: picolcd: prevent NULL pointer dereference in picolcd_send_and_wait()
In picolcd_send_and_wait(), an integer overflow of the signed loop counter 'k' can theoretically lead to a NULL pointer dereference of 'raw_data'. If the loop executes more than INT_MAX times, 'k' becomes negative, making the condition 'k < size' true even when 'size' is 0.
Change the type of 'k' to 'unsigned int' to prevent the overflow and eliminate the out-of-bounds access.
Found by Linux Verification Center (linuxtesting.org) with the Svace static analysis tool.
[[email protected]: extended hash length]
Which versions are affected by CVE-2026-80605?
How do I fix CVE-2026-80605?
Apply the vendor's patch.
Is CVE-2026-80605 being exploited?
There is no known exploitation of CVE-2026-80605 in the wild and no public exploit code.
Sources
Also known as BELL-CVE-2026-80605, DEBIAN-CVE-2026-80605, GHSA-g689-gjw8-39fq, UBUNTU-CVE-2026-80605.