# 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 |

---

Data as of 2026-11-12T19:57:06Z 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 Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

Free to use with attribution: show "Data: Patchblox Patch Radar" with a link to https://patchblox.com/security/patch-radar. Terms, including what needs a written agreement: https://patchblox.com/security/patch-radar/use-the-data

Product names, logos and trademarks shown on Patch Radar belong to their respective owners. They are used only to identify the software each security fix applies to and to help readers find their platform. Their use does not imply any affiliation with, or endorsement by, those owners, and Patchblox is not affiliated with any of them.