Use of Uninitialized Variable 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-22132216
- published2 Nov 2026
- disclosed1 Nov 2026
- creditUnknown
Introduced: 1 Nov 2026
NewCVE-2026-120243 (opens in a new tab)How to fix?
A fix was pushed into the master branch but not yet published.
Overview
Affected versions of this package are vulnerable to Use of Uninitialized Variable via the kempf_restore_buf process. An attacker can access sensitive stack memory contents by crafting a G2M3/G2M4 stream with a short Kempf palette, causing out-of-range palette indices to copy uninitialized stack bytes, including pointers or stack guards, into the decoded output.