CVE-2026-43048 HID: core: Mitigate potential OOB by removing bogus memset()
A flaw in the Linux kernel HID core allows out-of-bounds memory access via a bogus memset, potentially leading to code execution or system crashes.
- 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-2026-43048?
CVE-2026-43048 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: core: Mitigate potential OOB by removing bogus memset()
The memset() in hid_report_raw_event() has the good intention of clearing out bogus data by zeroing the area from the end of the incoming data string to the assumed end of the buffer. However, as we have previously seen, doing so can easily result in OOB reads and writes in the subsequent thread of execution.
The current suggestion from one of the HID maintainers is to remove the memset() and simply return if the incoming event buffer size is not large enough to fill the associated report.
Suggested-by Benjamin Tissoires <[email protected]>
[bentiss: changed the return value]
Which versions are affected by CVE-2026-43048?
It affects 1 product.
Products include Linux kernel.
How do I fix CVE-2026-43048?
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-2026-43048 being exploited?
There is no known exploitation of CVE-2026-43048 in the wild and no public exploit code.
Other vulnerabilities in Linux kernel
Sources
Also known as AZL-85350, BELL-CVE-2026-43048, DEBIAN-CVE-2026-43048, GHSA-7r6r-545m-fqv3, ROOT-OS-DEBIAN-11-CVE-2026-43048, ROOT-OS-DEBIAN-12-CVE-2026-43048 and 4 more.