CVE-2026-64830

8.8 Élevée

Publiée le 22/07/2026 à 19:16 · Modifiée le 24/10/2026 à 17:10 · Analysée par le NVD · Source : disclosure@vulncheck.com

Description

FFmpeg versions 2.1 through 8.1.2 contains a heap buffer overflow vulnerability in the VobSub subtitle demuxer that allows attackers to corrupt adjacent heap memory by supplying a malicious .sub/.idx subtitle file declaring more distinct stream IDs than the fixed-size array bounds in libavformat/mpeg.c. Attackers can craft a subtitle file with excessive distinct stream IDs to trigger unbounded writes beyond the vobsub->q[] array boundary via ff_subtitles_queue_insert(), potentially achieving arbitrary code execution in any application using FFmpeg's VobSub demuxer.

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Produits concernés

Scores CVSS

Version	Score	Source	Vecteur
4.0	8.7 Élevée	disclosure@vulncheck.com	`CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X`
3.1	8.8 Élevée	disclosure@vulncheck.com	`CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H`

Faiblesses (CWE)

CWE-122

Références

https://code.ffmpeg.org/FFmpeg/FFmpeg/commit/dbd495f066a85ba96b17433f4306582aa37c3951 Patch
https://code.ffmpeg.org/FFmpeg/FFmpeg/pulls/23657 Issue TrackingPatch
https://www.vulncheck.com/advisories/ffmpeg-heap-buffer-overflow-via-vobsub-subtitle-demuxer Third Party Advisory

CVE-2026-64830

Description

Produits concernés

Scores CVSS

Faiblesses (CWE)

Références

Ailleurs