CVE-2026-89729 HID: sensor-hub: Fix out-of-bounds write in sensor_hub_get_feature
A malicious HID descriptor can trigger an out-of-bounds write in the Linux kernel sensor-hub driver, potentially allowing local attackers to execute code or escalate privileges.
- 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-2026-89729?
CVE-2026-89729 is a high-severity memory corruption vulnerability in Linux, published on 11 Sep 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: sensor-hub: Fix out-of-bounds write in sensor_hub_get_feature
sensor_hub_get_feature() clamps its return value to the caller's buffer size, but the copy loop still copies field->report_size / 8 bytes for each report value. A malicious HID descriptor can advertise a large feature field size while an IIO caller supplies a small stack buffer, such as a single s32, causing an out-of-bounds write.
HID core stores parsed report values in __s32 slots and clamps extracted values to 32 bits. Reject feature fields that require more than one slot per value, guard the total byte count calculation, and clamp each per-value copy to the remaining caller buffer.
Which versions are affected by CVE-2026-89729?
How do I fix CVE-2026-89729?
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-2026-89729 being exploited?
There is no known exploitation of CVE-2026-89729 in the wild and no public exploit code.
Sources
Also known as AZL-100848, BELL-CVE-2026-89729, DEBIAN-CVE-2026-89729, GHSA-2hjf-83c6-w88p, UBUNTU-CVE-2026-89729.