What’s Vulnerable › Vulnerabilities

CVE-2026-112281: libaribb24 through 1.0.3 Stack Buffer Overflow via decoder_handle_csi

• Severity: medium (CVSS 6.1 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-10-19 · updated 2026-10-19
• Weakness: CWE-121

Description

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.

Affected products

• nkoriyama aribb24: through 1.0.3

References

• https://github.com/nkoriyama/aribb24/blob/v1.0.3/src/decoder.c
• https://hackmd.io/@haindpwn/aribb24-caption-data-unit-and-csi-oob-write
• https://www.vulncheck.com/advisories/libaribb24-through-1.0.3-stack-buffer-overflow-via-decoder-handle-csi
• https://hackmd.io/@haindpwn/cve-2026-112280-112281-aribb24-caption-data-unit-and-csi-oob-write

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