Use of Uninitialized Variable in Linux kernel - CVE-2026-63965
Published: July 20, 2026
Vulnerability identifier: #VU138685
CSH Severity: Low
CVSS v4.0: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear
CVE-ID: CVE-2026-63965
CWE-ID: CWE-457
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 disclose sensitive information.
The vulnerability exists due to an uninitialized stack-based buffer in bmp580_trigger_handler() when processing sensor scan data for userspace. A local user can read exposed scan data to disclose sensitive information.
Two bytes of stack memory may be exposed to userspace per scan because 24-bit sensor data is copied into 32-bit fields, leaving the high byte of temperature and pressure values uninitialized.
How to mitigate CVE-2026-63965
Install security update from vendor's repository.