SB20260912349 - Out-of-bounds read in Linux kernel intel speed_select_if driver
Published: September 12, 2026
Security Bulletin ID
SB20260912349
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) Out-of-bounds read (CVE-ID: CVE-2026-89443)
CWE-ID: CWE-125 - Out-of-bounds read
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 perform out-of-bounds reads.
The vulnerability exists due to an out-of-bounds read in the ISST perf mask ioctl handlers when processing user-supplied ioctl input containing an invalid performance level. A local user can submit a crafted ioctl request with an invalid level value to perform out-of-bounds reads.
Remediation
Install update from vendor's website.