Division by zero in Linux kernel - CVE-2026-63931
Published: July 20, 2026
Vulnerability identifier: #VU138719
CSH Severity: Low
CVSS v4.0: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear
CVE-ID: CVE-2026-63931
CWE-ID: CWE-369
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vendor: Linux Foundation
Affected software:
Linux kernel
Linux kernel
Detailed vulnerability description
The vulnerability allows a local user to cause a denial of service.
The vulnerability exists due to division by zero in the scd30_write_raw function when writing a zero fractional part to the sampling_frequency sysfs attribute. A local user can write a zero fractional value to the sampling_frequency sysfs attribute to cause a denial of service.
How to mitigate CVE-2026-63931
Install security update from vendor's repository.
Sources
- https://git.kernel.org/stable/c/2c50c017df97bfb425038efdfb8514c7bcd08564
- https://git.kernel.org/stable/c/4748bce423a363bb8a85a624faeb8f54fe331611
- https://git.kernel.org/stable/c/5aba4f94b225617a55fed442a70329b2ee19c0a5
- https://git.kernel.org/stable/c/5e4d34092a5ebfbc3a45a180c76ecb1cdbbedd53
- https://git.kernel.org/stable/c/6308b812acdcac38cbfe1af0b1524c3375f408a5
- https://git.kernel.org/stable/c/c7a740bf75554b051fabb17596ca6e483d6e6d90
- https://git.kernel.org/stable/c/d98c2e69aab905d1b19a69ffe584efa46a9efd42
- https://git.kernel.org/stable/c/e85bc501947f5ae16dd9adc01162b76d55ab7962