CVE-2026-67290
Received Received - Intake

Heap Out-of-Bounds Read in FreeRDP TSMF FFmpeg Decoder

Publication date: 2026-08-01

Last updated on: 2026-08-01

Assigner: VulnCheck

Description
FreeRDP before 3.29.0 contains a heap out-of-bounds read vulnerability in the TSMF FFmpeg decoder when parsing AVC1 MPEG2VIDEOINFO media types with insufficient ExtraData. Attackers can send malformed media format data from a server to trigger a crash by reading fixed offsets without validating source buffer length.

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Meta Information

Published
2026-08-01
Last Modified
2026-08-01
Generated
2026-08-01
AI Q&A
2026-08-01
EPSS Evaluated
N/A
NVD
CVE-2026-67290
EUVD
EUVD-2026-51865

Affected Vendors & Products

Showing 1 associated CPE
Vendor Product Version / Range
freerdp freerdp to 3.29.0 (exc)

Helpful Resources

Exploitability

CWE
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KEV
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CWE ID Description
CWE-125 The product reads data past the end, or before the beginning, of the intended buffer.

Attack-Flow Graph

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Executive Summary

FreeRDP before version 3.29.0 has a heap out-of-bounds read flaw in the TSMF FFmpeg decoder. This occurs when parsing AVC1 MPEG2VIDEOINFO media types with insufficient ExtraData. Attackers exploit this by sending malformed media format data from a server, causing the program to read fixed offsets without checking the source buffer length, leading to crashes.

Detection Guidance

Detecting this vulnerability requires monitoring for crashes or unusual behavior in FreeRDP clients when processing media formats. Check FreeRDP logs for heap out-of-bounds read errors during AVC1 MPEG2VIDEOINFO parsing. Network monitoring tools can detect malformed media format data from servers.

Impact Analysis

This vulnerability can cause applications using FreeRDP to crash when processing malicious media files. If exploited, it may lead to denial-of-service conditions, disrupting services that rely on FreeRDP for remote desktop or media processing.

Mitigation Strategies

Immediately update FreeRDP to version 3.29.0 or later to patch the heap out-of-bounds read vulnerability. If updating is not possible, restrict network access to FreeRDP clients or disable media format parsing until patched.

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