--- title: "CVE-2017-7826\n | Ubuntu" description: Ubuntu is an open source software operating system that runs from the desktop, to the cloud, to all your internet connected things. url: https://ubuntu.com/security/CVE-2017-7826?format=md keywords: index, follow --- # CVE-2017-7826 Publication date 15 November 2017 Last updated 25 August 2025 --- Ubuntu priority **Medium** [Why this priority?](https://ubuntu.com/security/cves/about#priority ) ## Cvss 3 Severity Score **9.8 · Critical** [Score breakdown](https://ubuntu.com/security/CVE-2017-7826?format=md#impact-score) Toggle side navigation ## 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. [Read the notes from the security team](https://ubuntu.com/security/CVE-2017-7826?format=md#notes) ## Status Show unmaintained releases | Package | Ubuntu Release | Status | | --- | --- | --- | | firefox | 24.04 LTS noble | Fixed 57.0.1+build2-0ubuntu1 | | 23.10 mantic | Fixed 57.0.1+build2-0ubuntu1 | | 23.04 lunar | Fixed 57.0.1+build2-0ubuntu1 | | 22.10 kinetic | Fixed 57.0.1+build2-0ubuntu1 | | 22.04 LTS jammy | Fixed 57.0.1+build2-0ubuntu1 | | 21.10 impish | Fixed 57.0.1+build2-0ubuntu1 | | 21.04 hirsute | Fixed 57.0.1+build2-0ubuntu1 | | 20.10 groovy | Fixed 57.0.1+build2-0ubuntu1 | | 20.04 LTS focal | Fixed 57.0.1+build2-0ubuntu1 | | 19.10 eoan | Fixed 57.0.1+build2-0ubuntu1 | | 19.04 disco | Fixed 57.0.1+build2-0ubuntu1 | | 18.10 cosmic | Fixed 57.0.1+build2-0ubuntu1 | | 18.04 LTS bionic | Fixed 57.0.1+build2-0ubuntu1 | | 17.10 artful | Fixed 57.0+build4-0ubuntu0.17.10.5 | | 17.04 zesty | Fixed 57.0+build4-0ubuntu0.17.04.5 | | 16.04 LTS xenial | Fixed 57.0+build4-0ubuntu0.16.04.5 | | 14.04 LTS trusty | Fixed 57.0+build4-0ubuntu0.14.04.4 | | mozjs38 | 24.04 LTS noble | Not in release | | 23.10 mantic | Not in release | | 23.04 lunar | Not in release | | 22.10 kinetic | Not in release | | 22.04 LTS jammy | Not in release | | 21.10 impish | Not in release | | 21.04 hirsute | Not in release | | 20.10 groovy | Not in release | | 20.04 LTS focal | Not in release | | 19.10 eoan | Not in release | | 19.04 disco | Not in release | | 18.10 cosmic | Not in release | | 18.04 LTS bionic | Ignored | | 17.10 artful | Ignored end of life | | 17.04 zesty | Ignored end of life | | 16.04 LTS xenial | Not in release | | 14.04 LTS trusty | Not in release | | mozjs52 | 24.04 LTS noble | Not in release | | 23.10 mantic | Not in release | | 23.04 lunar | Not in release | | 22.10 kinetic | Not in release | | 22.04 LTS jammy | Not in release | | 21.10 impish | Not in release | | 21.04 hirsute | Not in release | | 20.10 groovy | Ignored end of life | | 20.04 LTS focal | Ignored | | 19.10 eoan | Ignored end of life | | 19.04 disco | Ignored end of life | | 18.10 cosmic | Ignored end of life | | 18.04 LTS bionic | Fixed 52.8.1-0ubuntu0.18.04.1 | | 17.10 artful | Fixed 52.8.1-0ubuntu0.17.10.1 | | 17.04 zesty | Not in release | | 16.04 LTS xenial | Not in release | | 14.04 LTS trusty | Not in release | | thunderbird | 24.04 LTS noble | Fixed 1:52.6.0+build1-0ubuntu1 | | 23.10 mantic | Fixed 1:52.6.0+build1-0ubuntu1 | | 23.04 lunar | Fixed 1:52.6.0+build1-0ubuntu1 | | 22.10 kinetic | Fixed 1:52.6.0+build1-0ubuntu1 | | 22.04 LTS jammy | Fixed 1:52.6.0+build1-0ubuntu1 | | 21.10 impish | Fixed 1:52.6.0+build1-0ubuntu1 | | 21.04 hirsute | Fixed 1:52.6.0+build1-0ubuntu1 | | 20.10 groovy | Fixed 1:52.6.0+build1-0ubuntu1 | | 20.04 LTS focal | Fixed 1:52.6.0+build1-0ubuntu1 | | 19.10 eoan | Fixed 1:52.6.0+build1-0ubuntu1 | | 19.04 disco | Fixed 1:52.6.0+build1-0ubuntu1 | | 18.10 cosmic | Fixed 1:52.6.0+build1-0ubuntu1 | | 18.04 LTS bionic | Fixed 1:52.6.0+build1-0ubuntu1 | | 17.10 artful | Fixed 1:52.5.0+build1-0ubuntu0.17.10.1 | | 17.04 zesty | Fixed 1:52.5.0+build1-0ubuntu0.14.04.1 | | 16.04 LTS xenial | Fixed 1:52.5.0+build1-0ubuntu0.16.04.1 | | 14.04 LTS trusty | Fixed 1:52.5.0+build1-0ubuntu0.14.04.1 | --- * [How can I get the fixes?](https://ubuntu.com/security/cves/about#security) * [What do statuses mean?](https://ubuntu.com/security/cves/about#statuses) ## Notes --- ### [tyhicks](https://launchpad.net/~tyhicks) mozjs contains a copy of the SpiderMonkey JavaScript engine ## Severity score breakdown CVSS version: CVSS v3.0 **Base score** 9.8 · Critical * Base metrics | Parameter | Value | | --- | --- | | Attack vector | Network | | Attack complexity | Low | | Privileges required | None | | User interaction | None | | Scope | Unchanged | | Confidentiality impact | High | | Integrity impact | High | | Availability impact | High | * Scores | Parameter | Value | | --- | --- | | Base score | 9.8 · Critical | | Exploitability score | - | | Impact score | - | **Vector:** CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H ## References * [MITRE](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2017-7826) * [NVD](https://nvd.nist.gov/vuln/detail/CVE-2017-7826) * [Launchpad](https://launchpad.net/bugs/cve/CVE-2017-7826) * [Debian](https://security-tracker.debian.org/tracker/CVE-2017-7826) ### Related Ubuntu Security Notices (USN) + [USN-3490-1](https://usn.ubuntu.com/USN-3490-1) + Thunderbird vulnerabilities + 1 December 2017 + [USN-3688-1](https://usn.ubuntu.com/USN-3688-1) + Spidermonkey vulnerabilities + 19 June 2018 + [USN-3477-1](https://usn.ubuntu.com/USN-3477-1) + Firefox vulnerabilities + 16 November 2017 ### Other references * * *