# CVE-2017-7826: firefox: Memory safety bugs were reported in Firefox 56 and Firefox ESR 52.4

CVE-2017-7826 is fixed in 13 products on 1 platform, first by thunderbird 1:52.6.0+build1-0ubuntu1, released January 22, 2018. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2017-7826
- Priority: Routine
- CVSS: n/a (Medium)
- EPSS: 0.0334
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Nov 14, 2017

## Description

Memory safety bugs were reported in Firefox 56 and Firefox ESR 52.4. Some of these bugs showed evidence of memory corruption and we presume that with enough effort that some of these could be exploited to run arbitrary code. This vulnerability affects Firefox < 57, Firefox ESR < 52.5, and Thunderbird < 52.5.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | firefox Ubuntu 18.04.6 LTS (bionic) | 57.0.1+build2-0ubuntu1 | [firefox 57.0.1+build2-0ubuntu1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-firefox-57.0.1-build2-0ubuntu1.md) | Jun 11, 2018 |
| Linux | firefox-globalmenu Ubuntu 18.04.6 LTS (bionic) | 57.0.1+build2-0ubuntu1 | [firefox-globalmenu 57.0.1+build2-0ubuntu1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-firefox-globalmenu-57.0.1-build2-0ubuntu1.md) | Jun 11, 2018 |
| Linux | firefox-mozsymbols Ubuntu 18.04.6 LTS (bionic) | 57.0.1+build2-0ubuntu1 | [firefox-mozsymbols 57.0.1+build2-0ubuntu1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-firefox-mozsymbols-57.0.1-build2-0ubuntu1.md) | Jun 11, 2018 |
| Linux | firefox-testsuite Ubuntu 18.04.6 LTS (bionic) | 57.0.1+build2-0ubuntu1 | [firefox-testsuite 57.0.1+build2-0ubuntu1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-firefox-testsuite-57.0.1-build2-0ubuntu1.md) | Jun 11, 2018 |
| Linux | libmozjs-52-0 Ubuntu 18.04.6 LTS (bionic) | 52.8.1-0ubuntu0.18.04.1 | [libmozjs-52-0 52.8.1-0ubuntu0.18.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-libmozjs-52-0-52.8.1-0ubuntu0.18.04.1.md) | May 9, 2018 |
| Linux | thunderbird Ubuntu 18.04.6 LTS (bionic) | 1:52.6.0+build1-0ubuntu1 | [thunderbird 1:52.6.0+build1-0ubuntu1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-thunderbird-1-52.6.0-build1-0ubuntu1.md) | Jan 22, 2018 |
| Linux | thunderbird-globalmenu Ubuntu 18.04.6 LTS (bionic) | 1:52.6.0+build1-0ubuntu1 | [thunderbird-globalmenu 1:52.6.0+build1-0ubuntu1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-thunderbird-globalmenu-1-52.6.0-build1-0ubuntu1.md) | Jan 22, 2018 |
| Linux | thunderbird-gnome-support Ubuntu 18.04.6 LTS (bionic) | 1:52.6.0+build1-0ubuntu1 | [thunderbird-gnome-support 1:52.6.0+build1-0ubuntu1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-thunderbird-gnome-support-1-52.6.0-build1-0ubuntu1.md) | Jan 22, 2018 |
| Linux | thunderbird-mozsymbols Ubuntu 18.04.6 LTS (bionic) | 1:52.6.0+build1-0ubuntu1 | [thunderbird-mozsymbols 1:52.6.0+build1-0ubuntu1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-thunderbird-mozsymbols-1-52.6.0-build1-0ubuntu1.md) | Jan 22, 2018 |
| Linux | thunderbird-testsuite Ubuntu 18.04.6 LTS (bionic) | 1:52.6.0+build1-0ubuntu1 | [thunderbird-testsuite 1:52.6.0+build1-0ubuntu1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-thunderbird-testsuite-1-52.6.0-build1-0ubuntu1.md) | Jan 22, 2018 |
| Linux | xul-ext-calendar-timezones Ubuntu 18.04.6 LTS (bionic) | 1:52.6.0+build1-0ubuntu1 | [xul-ext-calendar-timezones 1:52.6.0+build1-0ubuntu1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-xul-ext-calendar-timezones-1-52.6.0-build1-0ubuntu1.md) | Jan 22, 2018 |
| Linux | xul-ext-gdata-provider Ubuntu 18.04.6 LTS (bionic) | 1:52.6.0+build1-0ubuntu1 | [xul-ext-gdata-provider 1:52.6.0+build1-0ubuntu1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-xul-ext-gdata-provider-1-52.6.0-build1-0ubuntu1.md) | Jan 22, 2018 |
| Linux | xul-ext-lightning Ubuntu 18.04.6 LTS (bionic) | 1:52.6.0+build1-0ubuntu1 | [xul-ext-lightning 1:52.6.0+build1-0ubuntu1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-xul-ext-lightning-1-52.6.0-build1-0ubuntu1.md) | Jan 22, 2018 |

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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