CVE-2026-121950 FreeRDP before 3.32.2 Heap Overflow via RDPGFX CREATE_SURFACE Integer Wrap

What is CVE-2026-121950?

CVE-2026-121950 is a high-severity vulnerability in FreeRDP, published on 4 Nov 2026.

Official description

FreeRDP before 3.32.2 does not check the product of surface dimensions in gdi_CreateSurface when handling an RDPGFX CREATE_SURFACE PDU, causing an integer wrap and heap buffer overflow on 32-bit builds and an approximately 4 GiB allocation on 64-bit builds. A malicious RDP server can send a CREATE_SURFACE PDU with width and height 32766 to a connecting client to corrupt heap memory or cause a denial of service.

Weakness: CWE-122

Which versions are affected by CVE-2026-121950?

It affects 1 product.

Products include FreeRDP.

How do I fix CVE-2026-121950?

Upgrade to a fixed version.

Is CVE-2026-121950 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-121950 exists.

Other vulnerabilities in FreeRDP

• CVE-2024-32658 FreeRDP ExtractRunLengthRegular* out of bound read Critical 9.8
• CVE-2024-32659 freerdp_image_copy out of bound read Critical 9.8
• CVE-2024-32039 FreeRDP Integer overflow & OutOfBound Write in clear_decompress_residual_data Critical 9.8
• CVE-2024-32041 FreeRDP OutOfBound Read in zgfx_decompress_segment Critical 9.8
• CVE-2024-32458 FreeRDP Out-Of-Bounds Read in planar_skip_plane_rle Critical 9.8

All FreeRDP vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• GitHub advisory
• How this page is made

Also known as DEBIAN-CVE-2026-121950, GHSA-f53w-3364-jr35, GHSA-j727-x54m-hfv3, UBUNTU-CVE-2026-121950.