Integer Overflow or Wraparound Affecting ffmpeg package, versions [0.5,9.0)
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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Start learning- Snyk IDSNYK-UNMANAGED-FFMPEG-18599389
- published9 Aug 2026
- disclosed7 Aug 2026
- creditAdrian Junge
Introduced: 7 Aug 2026
NewCVE-2026-70628 (opens in a new tab)How to fix?
Upgrade ffmpeg to version 9.0 or higher.
Overview
Affected versions of this package are vulnerable to Integer Overflow or Wraparound via the capacity check in dvbsub_parse in libavcodec/dvbsub_parser.c. An attacker can trigger an out-of-bounds heap write and potential code execution by supplying a crafted WTV file that drives the buf_size - buf_pos + pc->packet_index > PARSE_BUF_SIZE guard to wrap and bypass the parser’s bounds check before memcpy() writes attacker-controlled data into a heap buffer.