# CVE-2019-11471: libheif1: libheif 1.4.0 has a use-after-free in heif::HeifContext::Image::set_alpha_channel in heif_context.h because heif_cont...

CVE-2019-11471 is fixed in 2 products on 1 platform, first by libheif-examples 1.1.0-2ubuntu0.1~esm1, released April 23, 2019. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2019-11471
- Priority: Routine
- CVSS: n/a (Medium)
- EPSS: 0.0184
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Apr 23, 2019

## Description

libheif 1.4.0 has a use-after-free in heif::HeifContext::Image::set_alpha_channel in heif_context.h because heif_context.cc mishandles references to non-existing alpha images.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | libheif-examples Ubuntu 18.04.6 LTS (bionic) | 1.1.0-2ubuntu0.1~esm1 | [libheif-examples 1.1.0-2ubuntu0.1~esm1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-libheif-examples-1.1.0-2ubuntu0.1-esm1.md) | Apr 23, 2019 |
| Linux | libheif1 Ubuntu 18.04.6 LTS (bionic) | 1.1.0-2ubuntu0.1~esm1 | [libheif1 1.1.0-2ubuntu0.1~esm1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-libheif1-1.1.0-2ubuntu0.1-esm1.md) | Apr 23, 2019 |

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