SB2025070913 - Multiple vulnerabilities in Microsoft Brokering File System

Description

This security bulletin contains information about 3 vulnerabilities.

1) Double free (CVE-ID: CVE-2025-49693)

CWE-ID: CWE-415 - Double Free

CVSSv4: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear

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

The vulnerability exists due to a boundary error in Microsoft Brokering File System. A local user can pass specially crafted data to the application, trigger double free error and execute arbitrary code on the target system with elevated privileges.

2) Use-after-free (CVE-ID: CVE-2025-49677)

CWE-ID: CWE-416 - Use After Free

CVSSv4: CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear

The vulnerability allows a local user to compromise vulnerable system.

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

3) NULL pointer dereference (CVE-ID: CVE-2025-49694)

CWE-ID: CWE-476 - NULL Pointer Dereference

CVSSv4: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear

The vulnerability allows a local user to escalate privileges on the system.

The vulnerability exists due to a NULL pointer dereference error in Microsoft Brokering File System. A local user can pass specially crafted data to the application and gain elevated privileges on the target system.

Remediation

Install update from vendor's website.

References

• https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-49693
• https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-49677
• https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-49694