--- title: "CVE-2020-9947\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-2020-9947?format=md keywords: index, follow --- # CVE-2020-9947 Publication date 8 December 2020 Last updated 25 August 2025 --- Ubuntu priority **Medium** [Why this priority?](https://ubuntu.com/security/cves/about#priority ) ## Cvss 3 Severity Score **8.8 · High** [Score breakdown](https://ubuntu.com/security/CVE-2020-9947?format=md#impact-score) Toggle side navigation ## Description A use after free issue was addressed with improved memory management. This issue is fixed in watchOS 7.0, iOS 14.0 and iPadOS 14.0, iTunes for Windows 12.10.9, iCloud for Windows 11.5, tvOS 14.0, Safari 14.0. Processing maliciously crafted web content may lead to arbitrary code execution. [Read the notes from the security team](https://ubuntu.com/security/CVE-2020-9947?format=md#notes) ## Status Show unmaintained releases | Package | Ubuntu Release | Status | | --- | --- | --- | | qtwebkit-opensource-src | 24.04 LTS noble | Ignored | | 23.10 mantic | Ignored | | 23.04 lunar | Ignored end of life, was needs-triage | | 22.10 kinetic | Ignored end of life, was needs-triage | | 22.04 LTS jammy | Ignored | | 21.10 impish | Ignored end of life | | 21.04 hirsute | Ignored end of life | | 20.10 groovy | Ignored end of life | | 20.04 LTS focal | Ignored | | 18.04 LTS bionic | Ignored end of standard support, was needs-triage | | 16.04 LTS xenial | Ignored end of standard support, was needs-triage | | 14.04 LTS trusty | Not in release | | qtwebkit-source | 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 | | 18.04 LTS bionic | Ignored end of standard support, was needs-triage | | 16.04 LTS xenial | Ignored end of standard support, was needs-triage | | 14.04 LTS trusty | Not in release | | webkit2gtk | 24.04 LTS noble | Fixed 2.30.3-1 | | 23.10 mantic | Fixed 2.30.3-1 | | 23.04 lunar | Fixed 2.30.3-1 | | 22.10 kinetic | Fixed 2.30.3-1 | | 22.04 LTS jammy | Fixed 2.30.3-1 | | 21.10 impish | Fixed 2.30.3-1 | | 21.04 hirsute | Fixed 2.30.3-1 | | 20.10 groovy | Fixed 2.30.3-0ubuntu0.20.10.1 | | 20.04 LTS focal | Fixed 2.30.3-0ubuntu0.20.04.1 | | 18.04 LTS bionic | Fixed 2.30.3-0ubuntu0.18.04.1 | | 16.04 LTS xenial | Ignored end of standard support, was deferred | | 14.04 LTS trusty | Not in release | | webkitgtk | 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 | | 18.04 LTS bionic | Ignored end of standard support, was needs-triage | | 16.04 LTS xenial | Ignored end of standard support, was needs-triage | | 14.04 LTS trusty | Not in release | | wpewebkit | 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 | Ignored | | 21.10 impish | Ignored end of life | | 21.04 hirsute | Ignored end of life | | 20.10 groovy | Ignored end of life | | 20.04 LTS focal | Ignored | | 18.04 LTS bionic | Not in release | | 16.04 LTS xenial | Not in release | | 14.04 LTS trusty | Not in release | --- * [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 --- ### [jdstrand](https://launchpad.net/~jdstrand) webkit receives limited support. For details, see https://wiki.ubuntu.com/SecurityTeam/FAQ#webkit webkit in Ubuntu uses the JavaScriptCore (JSC) engine, not V8 ## Severity score breakdown CVSS version: CVSS v3.0 **Base score** 8.8 · High * Base metrics | Parameter | Value | | --- | --- | | Attack vector | Network | | Attack complexity | Low | | Privileges required | None | | User interaction | Required | | Scope | Unchanged | | Confidentiality impact | High | | Integrity impact | High | | Availability impact | High | * Scores | Parameter | Value | | --- | --- | | Base score | 8.8 · High | | Exploitability score | - | | Impact score | - | **Vector:** CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H ## References * [MITRE](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-9947) * [NVD](https://nvd.nist.gov/vuln/detail/CVE-2020-9947) * [Launchpad](https://launchpad.net/bugs/cve/CVE-2020-9947) * [Debian](https://security-tracker.debian.org/tracker/CVE-2020-9947) ### Other references *