SB20260626161 - Integer underflow in Linux kernel rtl8723bs core driver
Published: June 26, 2026
Security Bulletin ID
SB20260626161
CSH Severity
Medium
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Remote access
Highest impact
Denial of service
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 vulnerability.
1) Integer underflow (CVE-ID: CVE-2026-53178)
CWE-ID: CWE-191 - Integer underflow
CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green
The vulnerability allows a remote attacker to cause a denial of service.
The vulnerability exists due to an unsigned integer underflow in rtw_mlme.c when processing wireless network information elements. A remote attacker can provide a specially crafted beacon or management frame to cause a denial of service.
The issue is in the rtl8723bs staging driver during network selection and WPS/RSN information element handling.
Remediation
Install update from vendor's website.