# CVE-2016-3977: giflib-tools: Heap-based buffer overflow in util/gif2rgb.c in gif2rgb in giflib 5.1.2 allows remote attackers to cause a denial of...

CVE-2016-3977 is fixed in 2 products on 1 platform, first by giflib-tools 5.1.4-2ubuntu0.1, released August 16, 2019. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2016-3977
- Priority: Routine
- CVSS: n/a (Low)
- EPSS: 0.0210
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Apr 20, 2016

## Description

Heap-based buffer overflow in util/gif2rgb.c in gif2rgb in giflib 5.1.2 allows remote attackers to cause a denial of service (application crash) via the background color index in a GIF file.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | giflib-tools Ubuntu 18.04.6 LTS (bionic) | 5.1.4-2ubuntu0.1 | [giflib-tools 5.1.4-2ubuntu0.1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-giflib-tools-5.1.4-2ubuntu0.1.md) | Aug 16, 2019 |
| Linux | libgif7 Ubuntu 18.04.6 LTS (bionic) | 5.1.4-2ubuntu0.1 | [libgif7 5.1.4-2ubuntu0.1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-libgif7-5.1.4-2ubuntu0.1.md) | Aug 16, 2019 |

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Data as of 2026-11-07T06:34:28Z UTC. Source: Patchblox Patch Radar (https://patchblox.com/security/patch-radar). Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo