CVE-2026-80695 hwmon: (sht3x) Fix unaligned accesses
A local attacker can trigger a kernel panic on strict-alignment architectures by exploiting unaligned memory access in the SHT3x hardware monitoring driver.
- 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-2026-80695?
CVE-2026-80695 is a denial of service 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:
hwmon: (sht3x) Fix unaligned accesses
Sashiko reports:
In sht3x_update_client(), the 16-bit temperature and humidity values are extracted from a stack-allocated byte array using be16_to_cpup(). The pointers passed to this function are calculated as buf and buf + 3. Since the difference between the two pointers is an odd number of bytes, at least one of them is guaranteed to be at an unaligned offset.
This will trigger an alignment fault on strict-alignment architectures such as ARMv5 or SPARC, resulting in a kernel panic.
Fix the problem by using get_unaligned_be16() instead of be16_to_cpup(), and put_unaligned_be16() instead of cpu_to_be16().
Which versions are affected by CVE-2026-80695?
How do I fix CVE-2026-80695?
Apply the vendor's patch.
Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.
Is CVE-2026-80695 being exploited?
There is no known exploitation of CVE-2026-80695 in the wild and no public exploit code.
Sources
Also known as AZL-98075, BELL-CVE-2026-80695, DEBIAN-CVE-2026-80695, GHSA-g772-xp6h-pv6q, UBUNTU-CVE-2026-80695.