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CVE-2026-75144— FFmpeg Heap Buffer Overflow in VC-2/Dirac RTP Packetizer

Quick assessment

Affected
FFmpeg FFmpeg
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

FFmpeg是FFmpeg组织开源的一个多媒体处理框架。 FFmpeg 1cdeb3c之前版本存在缓冲区错误漏洞，该漏洞源于VC-2/Dirac RTP打包器（libavformat/rtpenc_vc2hq.c）在将输入派生的数据单元或片段大小复制到固定大小缓冲区时缺乏上限检查，导致堆缓冲区溢出，攻击者可通过提供特制的Dirac数据单元触发内存损坏。

CVSS 7.8 · High EPSS 0.20% · P9

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application

Affected Version Matrix 1

VendorProduct Version RangeStatus
FFmpeg FFmpeg < 1cdeb3c4e7f1f8566d846b9b451e01c376398818 affected
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I. Basic Information for CVE-2026-75144

Vulnerability Information
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Vulnerability Title
FFmpeg Heap Buffer Overflow in VC-2/Dirac RTP Packetizer
Source: CVE Program / CVE List V5
Vulnerability Description
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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
堆缓冲区溢出
Source: CVE Program / CVE List V5
Vulnerability Title
FFmpeg 缓冲区错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
FFmpeg是FFmpeg组织开源的一个多媒体处理框架。 FFmpeg 1cdeb3c之前版本存在缓冲区错误漏洞，该漏洞源于VC-2/Dirac RTP打包器（libavformat/rtpenc_vc2hq.c）在将输入派生的数据单元或片段大小复制到固定大小缓冲区时缺乏上限检查，导致堆缓冲区溢出，攻击者可通过提供特制的Dirac数据单元触发内存损坏。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
FFmpeg FFmpeg 0 ~ 1cdeb3c4e7f1f8566d846b9b451e01c376398818 -

II. Public POCs for CVE-2026-75144

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III. Intelligence Information for CVE-2026-75144

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Patches & Fixes for CVE-2026-75144 (2)

Vendor Advisories for CVE-2026-75144 (1)

Same Patch Batch · FFmpeg · 2026-08-19 · 7 CVEs total

CVE-2026-75143 9.8 CRITICAL FFmpeg Heap Buffer Overflow via RIST Protocol Reader
CVE-2026-75146 8.1 HIGH FFmpeg Out-of-Bounds Read in DASH Demuxer via dashdec.c
CVE-2026-75142 7.8 HIGH FFmpeg Stack Buffer Overflow in MPEG-PS Muxer via mpegenc.c
CVE-2026-75141 7.8 HIGH FFmpeg Heap Buffer Overflow in hvcC Box Writer via HEVC Muxing
CVE-2026-75147 7.1 HIGH FFmpeg Out-of-Bounds Read in AV1 RTP Packetizer via rtpenc_av1.c
CVE-2026-75145 5.8 MEDIUM FFmpeg Integer Narrowing Conversion OOB Memory Access in AV1 RTP Packetizer

IV. Related Vulnerabilities

Same product: FFmpeg
Same vendor: FFmpeg
Same weakness: CWE-122

V. Comments for CVE-2026-75144

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