---
id: "CVE-2026-112284"
kind: "vulnerability"
aliases: ["CVE-2026-112284"]
title: "libaribcaption: crafted captions read past a table, leaking memory or crashing"
severity: "medium"
cvss: 4.8
epss: null
exploited: false
status: "open"
category: "package"
products: []
ecosystems: []
tags: ["broadcast-captions", "libaribcaption", "media-pipeline", "package"]
not_affected_if: ["no-untrusted-caption-input", "not-using-1.1.0-to-1.1.2"]
published_at: "2026-10-19T14:17:06+00:00"
first_seen_at: "2026-10-23T21:57:18+00:00"
updated_at: "2026-10-25T04:33:29+00:00"
sources: [{"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-112284", "first_seen_at": "2026-10-23T21:57:18+00:00"}]
---

# libaribcaption: crafted captions read past a table, leaking memory or crashing

libaribcaption, a library that decodes Japanese broadcast captions, reads past the end of an internal 78-entry table when a caption selects the Latin special character set. An attacker who supplies a crafted caption can leak adjacent read-only memory or crash the decoder.

_Summary, check and fix written by a model from the sources; labelled as such._

## How to check

- Run `pkg-config --modversion libaribcaption` or check the vendored copy's version in your build files, and look for `1.1.0` through `1.1.2`.
- Search dependencies for libaribcaption with `grep -ri libaribcaption` in your build or lock files.

## Fix

- Move to a libaribcaption release newer than `1.1.2`; the sources do not name the exact fixed version, so check the upstream project's release notes.
- Until patched, avoid decoding captions from untrusted streams with the affected version.

## Timeline

- 2026-10-23T21:57:18+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2026-112284

## From the sources

libaribcaption 1.1.0 through 1.1.2 contains a global out-of-bounds read in DecoderImpl::HandleGLGR() that reads past the 78-entry kLatinSpecialTable without an upper bound check. Attackers can supply crafted captions designating the Latin special set with ESC 28 4C followed by bytes 0x6F-0x7E to leak adjacent read-only data or crash decoding.

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