CVE-2026-64497 iio: chemical: scd30: Cleanup initializations and fix sign-extension bug
A sign-extension bug in the Linux kernel SCD30 sensor driver can corrupt data, potentially leading to information disclosure or denial of service.
- 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-2026-64497?
CVE-2026-64497 is a vulnerability in Linux, published on 25 Jul 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:
iio: chemical: scd30: Cleanup initializations and fix sign-extension bug
Include linux/bitfield.h for FIELD_GET().
Create new macros for bit manipulation in combination with manual bit manipulation being replaced with FIELD_GET().
The current variable declaration and initializations are barely readable and use comma separations across multiple lines. Refactor the initializations so that mantissa and exp have separate declarations and sign gets initialized later.
In addition (and due to the nature of the cleanup), fix a sign-extension bug where, float32 would get bitwise anded with ~BIT(31) (which is 0xFFFFFFFF7FFFFFFF) which corrupted the exponent.
Which versions are affected by CVE-2026-64497?
How do I fix CVE-2026-64497?
Apply the vendor's patch.
Is CVE-2026-64497 being exploited?
There is no known exploitation of CVE-2026-64497 in the wild and no public exploit code.
Sources
Also known as BELL-CVE-2026-64497, DEBIAN-CVE-2026-64497, GHSA-mrh8-mp34-58pv, ROOT-OS-UBUNTU-2204-CVE-2026-64497, UBUNTU-CVE-2026-64497.