---
id: CVE-2026-112281
title: libaribb24 through 1.0.3 Stack Buffer Overflow via decoder_handle_csi
summary: >-
  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. Atta…
severity: medium
cvss: 6.1
cvssVector: 'CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:H'
cvssSource: cna
cwe:
  - CWE-121
vendor: nkoriyama
product: aribb24
affected:
  - aribb24 <= 1.0.3
ssvc:
  exploitation: poc
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2026-10-19T14:20:02.109030Z'
exploitAvailable: true
published: '2026-10-19'
updated: '2026-10-19'
sourceUpdated: '2026-10-19T14:20:24.874Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-112281'
references:
  - url: 'https://hackmd.io/@haindpwn/aribb24-caption-data-unit-and-csi-oob-write'
  - url: 'https://github.com/nkoriyama/aribb24/blob/v1.0.3/src/decoder.c'
  - url: >-
      https://www.vulncheck.com/advisories/libaribb24-through-1.0.3-stack-buffer-overflow-via-decoder-handle-csi
    label: >-
      VulnCheck Advisory: libaribb24 through 1.0.3 Stack Buffer Overflow via
      decoder_handle_csi
tags:
  - cve.org
  - exploit-available
ingestedAt: '2026-10-19T14:30:01.062Z'
---

## Overview

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

- `aribb24 <= 1.0.3`

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.