CVE-2026-43047 HID: multitouch: Check to ensure report responses match the request
A malicious HID device can trigger out-of-bounds writes in the Linux kernel by mismatching report IDs, potentially leading to code execution or privilege escalation.
- 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-2026-43047?
CVE-2026-43047 is a high-severity memory corruption vulnerability in Linux kernel, published on 1 May 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: multitouch: Check to ensure report responses match the request
It is possible for a malicious (or clumsy) device to respond to a specific report's feature request using a completely different report ID. This can cause confusion in the HID core resulting in nasty side-effects such as OOB writes.
Add a check to ensure that the report ID in the response, matches the one that was requested. If it doesn't, omit reporting the raw event and return early.
Which versions are affected by CVE-2026-43047?
It affects 1 product.
Products include Linux kernel.
How do I fix CVE-2026-43047?
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-2026-43047 being exploited?
There is no known exploitation of CVE-2026-43047 in the wild and no public exploit code.
Other vulnerabilities in Linux kernel
Sources
Also known as BELL-CVE-2026-43047, DEBIAN-CVE-2026-43047, GHSA-7hpp-5q55-m9qp, ROOT-OS-DEBIAN-11-CVE-2026-43047, ROOT-OS-UBUNTU-2204-CVE-2026-43047, ROOT-OS-UBUNTU-2404-CVE-2026-43047 and 1 more.