These are the Ubuntu security notices that affect the current supported releases of Ubuntu. These notices are also posted to the ubuntu-security-announce mailing list (list archive). To report a security vulnerability in an Ubuntu package, please contact the Ubuntu Security Team. You may also be interested in learning about Ubuntu security policies. For more details on a specific CVE or source package, please see the Ubuntu CVE Tracker.

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Latest notices

USN-4286-2: Linux kernel (Xenial HWE) vulnerabilities

USN-4286-1 fixed vulnerabilities in the Linux kernel for Ubuntu 16.04 LTS. This update provides the corresponding updates for the Linux Hardware Enablement (HWE) kernel from Ubuntu 16.04 LTS for Ubuntu 14.04 ESM. It was discovered that the Linux kernel did not properly clear data structures on context switches for certain Intel graphics…

18 February 2020 | ubuntu-14.04-esm

USN-4286-1: Linux kernel vulnerabilities

It was discovered that the Linux kernel did not properly clear data structures on context switches for certain Intel graphics processors. A local attacker could use this to expose sensitive information. (CVE-2019-14615) It was discovered that a race condition existed in the Softmac USB Prism54 device driver in the Linux kernel. A physically…

18 February 2020 | ubuntu-16.04-lts

USN-4287-1: Linux kernel vulnerabilities

It was discovered that the Linux kernel did not properly clear data structures on context switches for certain Intel graphics processors. A local attacker could use this to expose sensitive information. (CVE-2019-14615) It was discovered that the Atheros 802.11ac wireless USB device driver in the Linux kernel did not properly validate device…

18 February 2020 | ubuntu-18.04-lts, ubuntu-16.04-lts

USN-4285-1: Linux kernel vulnerabilities

It was discovered that the Linux kernel did not properly clear data structures on context switches for certain Intel graphics processors. A local attacker could use this to expose sensitive information. (CVE-2019-14615) It was discovered that the HSA Linux kernel driver for AMD GPU devices did not properly check for errors in certain situations,…

18 February 2020 | ubuntu-18.04-lts

USN-4283-1: QEMU vulnerabilities

Felipe Franciosi, Raphael Norwitz, and Peter Turschmid discovered that QEMU incorrectly handled iSCSI server responses. A remote attacker in control of the iSCSI server could use this issue to cause QEMU to crash, leading to a denial of service, or possibly execute arbitrary code. (CVE-2020-1711) It was discovered that the QEMU libslirp component…

18 February 2020 | ubuntu-19.10, ubuntu-18.04-lts, ubuntu-16.04-lts

USN-4280-2: ClamAV vulnerability

USN-4280-1 fixed a vulnerability in ClamAV. This update provides the corresponding update for Ubuntu 12.04 ESM and Ubuntu 14.04 ESM. Original advisory details: It was discovered that ClamAV incorrectly handled memory when the Data-Loss-Prevention (DLP) feature was enabled. A remote attacker could possibly use this issue to cause ClamAV to…

18 February 2020 | ubuntu-14.04-esm, ubuntu-12.04-esm

USN-4282-1: PostgreSQL vulnerability

It was discovered that PostgreSQL incorrectly performed authorization checks when handling the "ALTER … DEPENDS ON EXTENSION" sub-commands. A remote attacker could possibly use this issue to drop any function, procedure, materialized view, index, or trigger under certain conditions.

18 February 2020 | ubuntu-19.10, ubuntu-18.04-lts

USN-4281-1: WebKitGTK+ vulnerabilities

A large number of security issues were discovered in the WebKitGTK+ Web and JavaScript engines. If a user were tricked into viewing a malicious website, a remote attacker could exploit a variety of issues related to web browser security, including cross-site scripting attacks, denial of service attacks, and arbitrary code execution.

18 February 2020 | ubuntu-19.10, ubuntu-18.04-lts

USN-4280-1: ClamAV vulnerability

It was discovered that ClamAV incorrectly handled memory when the Data-Loss-Prevention (DLP) feature was enabled. A remote attacker could possibly use this issue to cause ClamAV to crash, resulting in a denial of service.

18 February 2020 | ubuntu-19.10, ubuntu-18.04-lts, ubuntu-16.04-lts

USN-4279-1: PHP vulnerabilities

It was discovered that PHP incorrectly handled certain scripts. An attacker could possibly use this issue to cause a denial of service. This issue only affected Ubuntu 12.04 ESM, Ubuntu 14.04 ESM and Ubuntu 16.04 LTS. (CVE-2015-9253) It was discovered that PHP incorrectly handled certain inputs. An attacker could possibly use this issue to expose…

17 February 2020 | ubuntu-19.10, ubuntu-18.04-lts, ubuntu-16.04-lts, ubuntu-14.04-esm, ubuntu-12.04-esm