SB2026091839 - Out-of-bounds read in Linux kernel realtek rtw89 driver
Published: September 18, 2026
Security Bulletin ID
SB2026091839
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-2026-93166)
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 read out-of-bounds memory.
The vulnerability exists due to an off-by-one error in rtw89_ppdu_str() in the rtw89 wireless driver debug code when handling a type value equal to the size of the rtw89_ppdu_infos array. A local user can supply such a type value to read out-of-bounds memory.
Remediation
Install update from vendor's website.