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CVE-2026-75142— FFmpeg Stack Buffer Overflow in MPEG-PS Muxer via mpegenc.c

CVSS 7.8 · High EPSS 0.14% · P4

Possible ATT&CK Techniques 1AI

T1203 · Exploitation for Client Execution

Affected Version Matrix 1

VendorProductVersion RangeStatus
FFmpegFFmpeg< 9d786e4b5e9b8482651928574de33772aeee7be1affected
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I. Basic Information for CVE-2026-75142

Vulnerability Information
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Vulnerability Title
FFmpeg Stack Buffer Overflow in MPEG-PS Muxer via mpegenc.c
Source: CVE Program / CVE List V5
Vulnerability Description
FFmpeg before commit 9d786e4 contains a stack buffer overflow in the MPEG-PS muxer (libavformat/mpegenc.c). When muxing input with more streams than the muxer's fixed-size stack buffer accommodates, the buffer is overflowed. A crafted input with an excessive number of streams triggers the overflow during MPEG-PS muxing.
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
栈缓冲区溢出
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 9d786e4之前版本存在缓冲区错误漏洞，该漏洞源于MPEG-PS muxer（libavformat/mpegenc.c）在处理输入流时，当输入流数量超过固定大小栈缓冲区容量时发生栈缓冲区溢出，特制输入可触发该漏洞。
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

VendorProductAffected VersionsCPESubscribe
FFmpegFFmpeg 0 ~ 9d786e4b5e9b8482651928574de33772aeee7be1 -

II. Public POCs for CVE-2026-75142

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III. Intelligence Information for CVE-2026-75142

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Patches & Fixes for CVE-2026-75142 (2)

Other References for CVE-2026-75142 (1)

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

CVE-2026-751439.8 CRITICALFFmpeg Heap Buffer Overflow via RIST Protocol Reader
CVE-2026-751468.1 HIGHFFmpeg Out-of-Bounds Read in DASH Demuxer via dashdec.c
CVE-2026-751417.8 HIGHFFmpeg Heap Buffer Overflow in hvcC Box Writer via HEVC Muxing
CVE-2026-751447.8 HIGHFFmpeg Heap Buffer Overflow in VC-2/Dirac RTP Packetizer
CVE-2026-751477.1 HIGHFFmpeg Out-of-Bounds Read in AV1 RTP Packetizer via rtpenc_av1.c
CVE-2026-751455.8 MEDIUMFFmpeg Integer Narrowing Conversion OOB Memory Access in AV1 RTP Packetizer

IV. Related Vulnerabilities

Same product: FFmpeg
Same vendor: FFmpeg
Same weakness: CWE-121

V. Comments for CVE-2026-75142

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