Out-of-bounds Write Affecting ffmpeg package, versions [0,]
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-CONAN-FFMPEG-18235335
- published23 Jul 2026
- disclosed22 Jul 2026
- creditUnknown
Introduced: 22 Jul 2026
NewCVE-2026-64835 (opens in a new tab)How to fix?
There is no fixed version for ffmpeg.
Overview
Affected versions of this package are vulnerable to Out-of-bounds Write in adx_decode_frame in libavcodec/adxdec.c. An attacker can trigger memory corruption or a crash by supplying a crafted ADX or AAX audio stream that delivers AV_PKT_DATA_NEW_EXTRADATA mid-stream and changes the channel layout. When the decoder re-parses the header for the new extradata, it continues using the old c->channels value for the prev[] state array, so later decoding steps index that array with the wrong channel count. This can corrupt adjacent memory or read past the end of the array during playback or transcoding of the malicious file.