Integer overflow in FreeRDP - CVE-2026-27951
Published: April 8, 2026
Vulnerability identifier: #VU125343
CSH Severity: Medium
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:U/U:Green
CVE-ID: CVE-2026-27951
CWE-ID: CWE-190
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: FreeRDP
Affected software:
FreeRDP
FreeRDP
Detailed vulnerability description
The vulnerability allows a remote attacker to cause a denial of service.
The vulnerability exists due to integer overflow in Stream_EnsureCapacity when increasing stream allocation capacity. A remote attacker can trigger allocation growth that overflows SIZE_MAX to cause a denial of service.
Practical exploitation only works on 32-bit systems where the available physical memory is greater than or equal to SIZE_MAX.
How to mitigate CVE-2026-27951
Install security update from vendor's website.