---
id: "CVE-2026-122329"
kind: "vulnerability"
aliases: ["CVE-2026-122329"]
title: "SDL_mixer: crafted AIFF-C file overflows stack, risking code execution"
severity: "high"
cvss: 8.5
epss: null
exploited: false
status: "open"
category: "package"
products: []
ecosystems: []
tags: ["c", "c++", "games", "package", "sdl", "sdl_mixer"]
not_affected_if: ["no-aiff-decoding", "other-sdl-mixer-versions", "trusted-audio-only"]
published_at: "2026-11-05T16:17:46+00:00"
first_seen_at: "2026-11-05T16:40:02+00:00"
updated_at: "2026-11-05T16:41:19+00:00"
sources: [{"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-122329", "first_seen_at": "2026-11-05T16:40:02+00:00"}]
exploit_sources: []
---

# SDL_mixer: crafted AIFF-C file overflows stack, risking code execution

SDL_mixer versions 3.1.2 through 3.2.4 miscalculate output offsets when decoding A-law or mu-law AIFF-C audio, causing a stack buffer overflow in FetchXLaw(). An attacker who supplies a crafted AIFF-C file can overwrite about 1 KB of adjacent stack memory, crashing the app or potentially running code.

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

## How to check

- Check the SDL_mixer version your app links against, for example in your dependency manifest or with `pkg-config --modversion SDL3_mixer` where it is installed.
- Look for `src/decoder_aiff.c` in vendored copies of SDL_mixer.
- Check whether your application decodes AIFF-C files from untrusted sources.

## Fix

- SDL_mixer: move to a release newer than `3.2.4` (the fixed version is in the linked patch; the sources do not state the exact release number).

## Timeline

- 2026-11-05T16:40:02+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2026-122329

## Documents

- [advisory] Third-party advisory: www.vulncheck.com https://www.vulncheck.com/advisories/sdl-mixer-3.1.2-through-3.2.4-stack-based-buffer-overflow-via-fetchxlaw-in-aiff-decoder
- [fix] Patch: github.com https://github.com/libsdl-org/SDL_mixer/commit/34486847a607540ce9ef5fbe20979c7140bf8c82

## From the sources

SDL_mixer 3.1.2 through 3.2.4 contains a stack-based buffer overflow in FetchXLaw() in src/decoder_aiff.c due to miscalculated output offsets when expanding A-law or mu-law samples. Attackers can supply a crafted AIFF-C file that overwrites roughly 1 KB of adjacent stack memory when decoded, causing crashes or potential code execution.

---

_Free to read, with fair use of about 60 pages a minute. For higher limits or API access: sales@infrastack.ai_