FFmpeg Dirac rtpenc_vc2hq.c heap-based overflow

CVSS Meta Temp Score
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CTI Interest Score
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6.9$0-$5k0.00

Summaryinfo

A vulnerability identified as critical has been detected in FFmpeg. Affected is an unknown function of the file libavformat/rtpenc_vc2hq.c of the component Dirac Handler. The manipulation leads to heap-based overflow. This vulnerability is uniquely identified as CVE-2026-75144. The attack is possible to be carried out remotely. No exploit exists.

Detailsinfo

A vulnerability was found in FFmpeg (affected version not known). It has been rated as critical. This issue affects some unknown functionality of the file libavformat/rtpenc_vc2hq.c of the component Dirac Handler. The manipulation with an unknown input leads to a heap-based overflow vulnerability. Using CWE to declare the problem leads to CWE-122. A heap overflow condition is a buffer overflow, where the buffer that can be overwritten is allocated in the heap portion of memory, generally meaning that the buffer was allocated using a routine such as malloc(). Impacted is confidentiality, integrity, and availability. The summary by CVE is:

FFmpeg before commit 1cdeb3c contains a heap buffer overflow vulnerability in the VC-2/Dirac RTP packetizer (libavformat/rtpenc_vc2hq.c) that allows attackers to trigger memory corruption by supplying a crafted Dirac data unit. The packetizer copies an input-derived data unit or fragment size into a fixed-size buffer without an upper bound check, causing a heap buffer overflow when the crafted input is packetized for RTP output.

It is possible to read the advisory at code.ffmpeg.org. The identification of this vulnerability is CVE-2026-75144 since 08/17/2026. The exploitation is known to be easy. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. It demands that the victim is doing some kind of user interaction. Technical details of the vulnerability are known, but there is no available exploit.

The vulnerability scanner Nessus provides a plugin with the ID 338208 (Linux Distros Unpatched Vulnerability : CVE-2026-75144), which helps to determine the existence of the flaw in a target environment.

Applying the patch 1cdeb3c4e7f1f8566d846b9b451e01c376398818 is able to eliminate this problem.

The vulnerability is also documented in the vulnerability database at Tenable (338208). Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Productinfo

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA CVSS-B Score: 🔒
CNA CVSS-BT Score: 🔒
CNA Vector: 🔒

CVSSv3info

VulDB Meta Base Score: 7.0
VulDB Meta Temp Score: 6.9

VulDB Base Score: 6.3
VulDB Temp Score: 6.0
VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA Base Score: 7.8
CNA Vector (VulnCheck): 🔒

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Heap-based overflow
CWE: CWE-122 / CWE-119
CAPEC: 🔒
ATT&CK: 🔒

Physical: Partially
Local: Yes
Remote: Yes

Availability: 🔒
Status: Not defined

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

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Nessus ID: 338208
Nessus Name: Linux Distros Unpatched Vulnerability : CVE-2026-75144

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Patch
Status: 🔍

0-Day Time: 🔒

Patch: 1cdeb3c4e7f1f8566d846b9b451e01c376398818

Timelineinfo

08/17/2026 CVE reserved
08/19/2026 +2 days Advisory disclosed
08/19/2026 +0 days VulDB entry created
08/20/2026 +1 days VulDB entry last update

Sourcesinfo

Product: ffmpeg.org

Advisory: code.ffmpeg.org
Status: Confirmed

CVE: CVE-2026-75144 (🔒)
GCVE (CVE): GCVE-0-2026-75144
GCVE (VulDB): GCVE-100-393227

Entryinfo

Created: 08/19/2026 18:51
Updated: 08/20/2026 11:29
Changes: 08/19/2026 18:51 (75), 08/20/2026 11:29 (2)
Complete: 🔍
Cache ID: 216::103

Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

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