SB20260720268 - Use of Uninitialized Variable in Linux kernel iio pressure driver

Description

This security bulletin contains information about 1 vulnerability.

1) Use of Uninitialized Variable (CVE-ID: CVE-2026-63965)

CWE-ID: CWE-457 - Use of Uninitialized Variable

CVSSv4: 4.8 [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]

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.

Remediation

Install update from vendor's website.

References

• https://git.kernel.org/stable/c/387c86b582e0782ab332e7bfcd4e6e3f93922961
• https://git.kernel.org/stable/c/58dfb6fe9dc80270cf7cc014837af4cbf928e3aa
• https://git.kernel.org/stable/c/a58400f58f82f3d8de9c067aa7cda690228c1ecc