Heap Buffer Overflow in FreeRDP Client Affecting Remote Desktop Functionality
CVE-2026-29774

5.3MEDIUM

Key Information:

Vendor

Freerdp

Status
Freerdp
Vendor
CVE Published:
13 March 2026

What is CVE-2026-29774?

The FreeRDP client, prior to version 3.24.0, is susceptible to a client-side heap buffer overflow in its AVC420/AVC444 YUV-to-RGB conversion process. This issue stems from insufficient validation of the horizontal bounds in the H.264 metablock regionRects coordinates. When processing a maliciously crafted packet that exceeds surface dimensions, unchecked pointer arithmetic can lead to the writing of data beyond allocated memory, potentially allowing an attacker to execute arbitrary code. The vulnerability has been addressed in version 3.24.0.

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Affected Version(s)

FreeRDP < 3.24.0

References

https://github.com/FreeRDP/FreeRDP/security/advisories/GH...
x_refsource_CONFIRM
https://github.com/FreeRDP/FreeRDP/commit/6482b7a92fff395...
x_refsource_MISC

CVSS V3.1

Score:
5.3
Severity:
MEDIUM
Confidentiality:
None
Integrity:
None
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

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