SB20260720307 - Use of Uninitialized Variable in Linux kernel iio gyro driver
Published: July 20, 2026
Security Bulletin ID
SB20260720307
CSH Severity
Low
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Local access
Highest impact
Information disclosure
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 vulnerability.
1) Use of Uninitialized Variable (CVE-ID: CVE-2026-63934)
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 improper access of uninitialized memory in the itg3200 triggered buffer handling path when processing i2c reads for all scan channels. A local user can read data from /dev/iio:deviceX to disclose sensitive information.
The non-buffered read_raw() path is unaffected.
Remediation
Install update from vendor's website.
References
- https://git.kernel.org/stable/c/15a0b3f33ffb6c78b3de6f69b026ceb09b973dd1
- https://git.kernel.org/stable/c/31bbd4b87dd6701fa10e03ba7f6268e49e178d16
- https://git.kernel.org/stable/c/63203bd072b613c18c237b906b1c9d2dc4527337
- https://git.kernel.org/stable/c/6bdc3023d62ed5c7d591f0eb27a5adb37fb892ae
- https://git.kernel.org/stable/c/8654b5e2617819ff4f7c78071dfd0275e971a9b6
- https://git.kernel.org/stable/c/90e809376b0f0d1ddec2eec954aecdd2a5b40b0e
- https://git.kernel.org/stable/c/b64dd5f3b38911054cbcc570df617e3e8e75e562
- https://git.kernel.org/stable/c/cfc3283859cfdeacadf80d5e6880bdf871ffeaa6