CVE-2026-112281 PUBLISHED

libaribb24 (aribb24) through 1.0.3 contains a stack-based buffer overflow vulnerability in decoder_handle_csi() in src/decoder.c that allows attackers to write past a fixed 256-entry array by supplying unbounded CSI parameter bytes. Attackers can embed a caption statement with a CSI introducer and over 256 parameter bytes in media files or broadcast streams to crash FFmpeg or VLC or corrupt the return address.

• HaiND from the Post and Telecommunication Institute of Technology finder

• https://hackmd.io/@haindpwn/aribb24-caption-data-unit-and-csi-oob-write
• https://github.com/nkoriyama/aribb24/blob/v1.0.3/src/decoder.c
• VulnCheck Advisory: libaribb24 through 1.0.3 Stack Buffer Overflow via decoder_handle_csi

• Stack-based Buffer Overflow CWE