CVE-2026-75143— FFmpeg 缓冲区错误漏洞

FFmpeg Heap Buffer Overflow via RIST Protocol Reader

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.

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

堆缓冲区溢出

FFmpeg 缓冲区错误漏洞

FFmpeg是FFmpeg组织开源的一个多媒体处理框架。 FFmpeg 1c10bcc之前版本存在缓冲区错误漏洞，该漏洞源于librist_read()函数忽略其size参数，将完整接收的负载长度复制到调用者提供的目标缓冲区，导致堆缓冲区溢出，远程RIST发送者可通过发送超过调用者缓冲区大小的数据包触发该漏洞。

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