CVE-2026-75143 - FFmpeg Heap Buffer Overflow via RIST Protocol Reader
Brief
CVE ID : CVE-2026-75143
Published : Aug. 19, 2026, 4:26 p. m.
- 42 minutes ago
Description : FFmpeg before commit 1c10bcc contains a heap buffer overflow in the RIST protocol reader (libavformat/librist. c). librist_read() ignored its size argument and copied the full received payload length into the caller-provided destination buffer, overflowing it when the payload exceeds the destination size.
This is reachable via the async:rist:// URL scheme, where the async wrapper supplies a smaller buffer than the received payload. A remote RIST sender can trigger the overflow by sending a packet whose payload exceeds the caller buffer size.
Severity: 9.8
- CRITICAL
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