CVE-2026-67290

FreeRDP before 3.29.0 Heap Out-of-Bounds Read via TSMF

Published Aug 1, 2026 CVSS 4.0 · 8.7 High EPSS < 1% KEV · Not listed

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.

Analysis

Technical impact

FreeRDP prior to 3.29.0 contains a heap out‑of‑bounds read in the TSMF FFmpeg decoder. When parsing AVC1 MPEG2VIDEOINFO media types with insufficient ExtraData the decoder reads at fixed offsets without validating the source buffer length, causing a crash. This results in a loss of service for the affected client and may expose sensitive memory contents if the crash occurs during privileged execution.

Affected Systems

The vulnerable components are part of the FreeRDP project, version 3.29.0 and earlier. The issue affects users running any FreeRDP client that processes TSMF media streams, particularly those that accept AVC1 MPEG2VIDEOINFO formats, on any operating system supported by FreeRDP.

Risk and Exploitability

The CVSS score of 8.7 indicates a high severity vulnerability. An attacker can trigger the crash by sending a carefully crafted media format from a server to a FreeRDP client over the network; no elevated privileges are required on the client. EPSS information is not available and the vulnerability is not listed in CISA’s KEV catalog, but the lack of a public exploit does not mitigate the impact of the denial of service. Because the flaw is triggered by an external server, the risk remains high for clients that accept arbitrary media streams.

Affected Products

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions

FreeRDP

unaffected

Version	Status	Constraints
`0`	affected	< 3.29.0
`3.29.0`	unaffected	—

Configuration 1 [-]

cpe:2.3:a:freerdp:freerdp:*:*:*:*:*:*:*:*

No data.

Vendor Product Versions

Freerdp

Version	Status	Scheme	Platform
`[0,3.29.0)`	affected	semver	—
`3.29.0`	unaffected	semver	—

Remediation

No solution or workaround provided in the CVE record.

OpenCVE Recommended Actions

Upgrade FreeRDP to version 3.29.0 or later.
Disable or remove support for AVC1 MPEG2VIDEOINFO media types from the client configuration.
Configure the server to refuse or strip malformed media format data before transmission to clients.
Monitor application logs for unexpected crashes or memory read errors and investigate any anomalies.

Generated by OpenCVE AI on August 2, 2026 at 03:18 UTC.

Tracking

Advisories

No advisories available

Metrics

Attack Vector Network

Attack Complexity Low

Privileges Required None

Attack Requirements None

User Interaction None

Vulnerable System Confidentiality Impact None

Vulnerable System Integrity Impact None

Vulnerable System Availability Impact High

Subsequent System Confidentiality Impact None

Subsequent System Integrity Impact None

Subsequent System Availability Impact None

Attack Vector Network

Attack Complexity Low

Privileges Required None

Scope Unchanged

Confidentiality Impact None

Integrity Impact None

Availability Impact High

User Interaction None

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

Exploit prediction score: < 1% (0.616% probability within 30 days)

Exploitation none

Automatable yes

Technical Impact partial

References

Link	Providers
https://github.com/FreeRDP/FreeRDP/commit/8d3b86022f0d71aefa7bd2e466d2d391693a41b3
https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-whq8-c3v3-p8v8
https://nvd.nist.gov/vuln/detail/CVE-2026-67290
https://www.cve.org/CVERecord?id=CVE-2026-67290
https://www.vulncheck.com/advisories/freerdp-before-heap-out-of-bounds-read-via-tsmf

History

Aug 11, 2026 12:15 AM Added references. Scoring metrics updated View changes

Type	Values Removed	Values Added
References		https://nvd.nist.gov/vuln/detail/CVE-2026-67290 https://www.cve.org/CVERecord?id=CVE-2026-67290
Metrics	threat_severity `None`	threat_severity `Moderate`

Aug 3, 2026 4:30 PM Scoring metrics updated View changes

Type	Values Removed	Values Added
Metrics		ssvc `{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}`

Aug 1, 2026 12:45 PM Description updated. Title updated. First appearance in the feed. Weaknesses updated. Affected versions updated. Affected vendors updated. Added references. Scoring metrics updated View changes

Type	Values Removed	Values Added
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.
Title		FreeRDP before 3.29.0 Heap Out-of-Bounds Read via TSMF
First Time appeared		Freerdp Freerdp freerdp
Weaknesses		CWE-125
CPEs		cpe:2.3:a:freerdp:freerdp::::::::
Vendors & Products		Freerdp Freerdp freerdp
References		https://github.com/FreeRDP/FreeRDP/commit/8d3b86022f0d71aefa7bd2e466d2d391693a41b3 https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-whq8-c3v3-p8v8 https://www.vulncheck.com/advisories/freerdp-before-heap-out-of-bounds-read-via-tsmf
Metrics		cvssV3_1 `{'score': 7.5, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H'}` cvssV4_0 `{'score': 8.7, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N'}`