Stack-based Buffer Overflow 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-18235319
- published23 Jul 2026
- disclosed22 Jul 2026
- creditUnknown
Introduced: 22 Jul 2026
NewCVE-2026-64831 (opens in a new tab)How to fix?
There is no fixed version for ffmpeg.
Overview
Affected versions of this package are vulnerable to Stack-based Buffer Overflow due to the vk_hevc_end_frame function in libavcodec/vulkan_hevc.c. An attacker can overwrite stack data and potentially execute arbitrary code by supplying a crafted HEVC/H.265 bitstream with a vps_num_hrd_parameters value larger than HEVC_MAX_SUB_LAYERS. The vulnerable Vulkan HEVC decoder path processes the malicious VPS data during end-of-frame handling, where the oversized HRD parameter count drives writes past stack-allocated arrays. This can crash applications using FFmpeg or let remote input from a supported container format corrupt adjacent stack frames and return addresses.