JLSEC-2026-647 It is possible to cause an use-after-free write in SANM decoding with a carefully crafted animation...

It is possible to cause an use-after-free write in SANM decoding with a carefully crafted animation using subversion storedframe. Stored frames can later be referenced by FTCH chunks. For files using subversion storedframe. Leaving ctx-hasdimensions set to false. A subsequent chunk with type...

CVE-2025-59734 Heap-buffer-overflow write in FFmpeg SANM process_ftch

It is possible to cause an use-after-free write in SANM decoding with a carefully crafted animation using subversion storedframe. Stored frames can later be referenced by FTCH chunks. For files using subversion storedframe. Leaving ctx-hasdimensions set to false. A subsequent chunk with type...

PT-2025-40880

Name of the Vulnerable Software and Affected Versions versions prior to 8.0 Description A crafted animation can trigger a use-after-free write during SANM decoding. This occurs when a STOR chunk is followed by an FOBJ chunk, and the frame has an invalid size. The code attempts to decode a frame...