SB2025110357 - Memory corruption in libwebsockets
Published: November 3, 2025
Security Bulletin ID
SB2025110357
Severity
Medium
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Remote access
Highest impact
Code execution
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 security vulnerability.
1) Buffer overflow (CVE-ID: CVE-2025-1866)
The vulnerability allows a remote attacker to execute arbitrary code on the target system.
The vulnerability exists due to a boundary error in win32port/zlib/inftrees.c. A remote attacker can trigger memory corruption and execute arbitrary code on the target system.
Successful exploitation of this vulnerability requires that the code is built specifically for the Win32 platform with specific compiler options.
Remediation
Install update from vendor's website.