NULL Pointer Dereference in FreeRDP Affects Clients
CVE-2026-121402

7.1HIGH

Key Information:

Vendor

Freerdp

Status
Freerdp
Vendor
CVE Published:
3 November 2026

What is CVE-2026-121402?

FreeRDP versions prior to 3.32.2 are vulnerable to a NULL pointer dereference. This occurs when malicious RDP servers send a zero-width RDPGFX ResetGraphics PDU. As a result, the resize operation in gdi_resize_ex fails, leaving the primary display null without terminating the session. Consequently, a subsequent bitmap update attempt leads to a crash in the xfreerdp client due to gdi_Bitmap_Paint. This vulnerability poses significant risks to users and can disrupt remote sessions.

Affected Version(s)

FreeRDP 0 < 3.32.2

FreeRDP 3.32.2

References

https://github.com/FreeRDP/FreeRDP/security/advisories/GH...
vendor-advisory
https://www.vulncheck.com/advisories/freerdp-before-3.32....
third-party-advisory

CVSS V4

Score:
7.1
Severity:
HIGH
Confidentiality:
None
Integrity:
None
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
Unknown

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

Kushalkhemka
mayank-jangid-moon
opensec-intelligence
.