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CVE-2026-75143

9.3 critical SSVC exploitation: none Published
NVD · CVE.org

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.

Fix

Nothing published yet: no patch, vendor advisory or mitigation reference on NVD, no vendor advisory in the News for this CVE, not in CISA's KEV, no fixed package version. BaselineWatch does not guess at one.

Change history 2

  1. StatusAwaiting Analysis → PublishedNVD modified 2026-10-27 10:14
  2. First seenCVSS 9.3NVD modified 2026-10-26 11:10

Affected (CPE criteria) 0

NVD has not attached CPE configurations yet.

References 3