Heap-based Buffer Overflow Affecting ffmpeg package, versions [,9.0.1)
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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- published23 Aug 2026
- disclosed21 Aug 2026
- creditJoshua Rogers (AISLE Research)
Introduced: 21 Aug 2026
NewCVE-2026-75143 (opens in a new tab)How to fix?
Upgrade ffmpeg to version 9.0.1 or higher.
Overview
Affected versions of this package are vulnerable to Heap-based Buffer Overflow via the librist_read() function in the RIST protocol reader (libavformat/librist.c). A remote attacker can cause a heap-based buffer overflow by sending a RIST packet whose payload is larger than the destination buffer supplied by the caller. Because librist_read() ignores the provided buffer size and copies the entire received payload, attacker-controlled data can be written beyond the allocated heap buffer.
Note: The vulnerability is remotely reachable through the async:rist:// URL scheme, where the asynchronous wrapper can provide a destination buffer smaller than the received RIST payload.