# CVE-2017-6961: apng2gif: An issue was discovered in apng2gif 1.7

CVE-2017-6961 is fixed in apng2gif on 1 platform, first by apng2gif 1.8-0.1, released March 17, 2017. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2017-6961
- Priority: Routine
- CVSS: n/a (Medium)
- EPSS: 0.0080
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Mar 17, 2017

## Description

An issue was discovered in apng2gif 1.7. There is improper sanitization ofuser input causing huge memory allocations, resulting in a crash. This isrelated to the read_chunk function using the pChunk->size value (within thePNG file) to determine the amount of memory to allocate.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | apng2gif Ubuntu 20.04 LTS (focal) | 1.8-0.1 | [apng2gif 1.8-0.1](https://patchblox.com/security/data/fix/linux/ubuntu-focal-apng2gif-1.8-0.1.md) | Mar 17, 2017 |
| Linux | apng2gif Ubuntu 24.10 (oracular) | 1.8-0.1 | [apng2gif 1.8-0.1](https://patchblox.com/security/data/fix/linux/ubuntu-oracular-apng2gif-1.8-0.1.md) | Jan 16, 2026 |
| Linux | apng2gif Ubuntu 25.04 (plucky) | 1.8-0.1 | [apng2gif 1.8-0.1](https://patchblox.com/security/data/fix/linux/ubuntu-plucky-apng2gif-1.8-0.1.md) | Jan 16, 2026 |

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Data as of 2026-11-07T12:40:37Z 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 Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo