Heap out-of-bounds write via odd slice_height in FFmpeg MagicYUV decoder
41Vexday Risk Score
No sign of exploitation. It has a public proof of concept.
ssvc Attendcvss 8.8epss 1.6%
from disclosure to weapon5 days
Published on NVDJun 18
1st PoC+5d
exploitation probability
1.6%top 27% of all CVEs
observed exploitation
nono source reports it
5 public exploit(s)
An out-of-bounds write vulnerability in FFmpeg's libavcodec library, specifically in the MagicYUV decoder, allows denial-of-service and, in some cases, can be exploited for remote code execution.
This vulnerability is associated with the file libavcodec/magicyuv.C.
This issue affects FFmpeg before version 8.1.2.
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Affected products
FFmpeg · FFmpegpublic PoCs found — 5
githubgithub.com/Y5neKO/CVE-2026-8461-EXP★ 14githubgithub.com/anyanything/CVE-2026-8461-PoC★ 8githubgithub.com/0xBlackash/CVE-2026-8461★ 5githubgithub.com/HORKimhab/CVE-2026-8461★ 1githubgithub.com/ray-goldman/ffmpeg-jellyfix★ 0⚠ Public resources, to assess the exposure of systems you control or are authorized to test. Test only with authorization.