SB2025070881 - Multiple vulnerabilities in Microsoft Win32k

Description

This security bulletin contains information about 2 secuirty vulnerabilities.

1) Use-after-free (CVE-ID: CVE-2025-49733)

The vulnerability allows a local user to compromise vulnerable system.

The vulnerability exists due to a use-after-free error in Win32k. A local user can gain elevated privileges on the target system.

2) Heap-based buffer overflow (CVE-ID: CVE-2025-49727)

The vulnerability allows a local user to execute arbitrary code on the target system.

The vulnerability exists due to a boundary error in Win32k. A local user can pass specially crafted data to the application, trigger a heap-based buffer overflow and execute arbitrary code on the target system with elevated privileges.

Remediation

Install update from vendor's website.

References

• https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-49733
• https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-49727