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-4367-1: Linux kernel vulnerabilities

It was discovered that the btrfs implementation in the Linux kernel did not properly detect that a block was marked dirty in some situations. An attacker could use this to specially craft a file system image that, when unmounted, could cause a denial of service (system crash). (CVE-2019-19377) It was discovered that the linux kernel did not…

24 May 2020 | ubuntu-20.04-lts

USN-4369-1: Linux kernel vulnerabilities

It was discovered that the btrfs implementation in the Linux kernel did not properly detect that a block was marked dirty in some situations. An attacker could use this to specially craft a file system image that, when unmounted, could cause a denial of service (system crash). (CVE-2019-19377) Tristan Madani discovered that the file locking…

24 May 2020 | ubuntu-19.10, ubuntu-18.04-lts

USN-4370-2: ClamAV vulnerabilities

USN-4370-1 fixed several vulnerabilities in ClamAV. This update provides the corresponding update for Ubuntu 12.04 ESM and 14.04 ESM. Original advisory details: It was discovered that ClamAV incorrectly handled parsing ARJ archives. A remote attacker could possibly use this issue to cause ClamAV to crash, resulting in a denial of service….

21 May 2020 | ubuntu-14.04-esm, ubuntu-12.04-esm

USN-4372-1: QEMU vulnerabilities

It was discovered that QEMU incorrectly handled bochs-display devices. A local attacker in a guest could use this to cause a denial of service or possibly execute arbitrary code in the host. This issue only affected Ubuntu 19.10. (CVE-2019-15034) It was discovered that QEMU incorrectly handled memory during certain VNC operations. A remote…

21 May 2020 | ubuntu-20.04-lts, ubuntu-19.10, ubuntu-18.04-lts, ubuntu-16.04-lts

USN-4371-1: libvirt vulnerabilities

It was discovered that libvirt incorrectly handled an active pool without a target path. A remote attacker could possibly use this issue to cause libvirt to crash, resulting in a denial of service. (CVE-2020-10703) It was discovered that libvirt incorrectly handled memory when retrieving certain domain statistics. A remote attacker could possibly…

21 May 2020 | ubuntu-19.10, ubuntu-18.04-lts

USN-4370-1: ClamAV vulnerabilities

It was discovered that ClamAV incorrectly handled parsing ARJ archives. A remote attacker could possibly use this issue to cause ClamAV to crash, resulting in a denial of service. (CVE-2020-3327) It was discovered that ClamAV incorrectly handled parsing PDF files. A remote attacker could possibly use this issue to cause ClamAV to crash, resulting…

21 May 2020 | ubuntu-20.04-lts, ubuntu-19.10, ubuntu-18.04-lts, ubuntu-16.04-lts

USN-4363-1: Linux kernel vulnerabilities

It was discovered that the Serial CAN interface driver in the Linux kernel did not properly initialize data. A local attacker could use this to expose sensitive information (kernel memory). (CVE-2020-11494) It was discovered that the linux kernel did not properly validate certain mount options to the tmpfs virtual memory file system. A local…

21 May 2020 | ubuntu-18.04-lts, ubuntu-16.04-lts

USN-4365-2: Bind vulnerabilities

USN-4365-1 fixed several vulnerabilities in Bind. This update provides the corresponding update for Ubuntu 12.04 ESM and 14.04 ESM. Original advisory details: Lior Shafir, Yehuda Afek, and Anat Bremler-Barr discovered that Bind incorrectly limited certain fetches. A remote attacker could possibly use this issue to cause Bind to consume…

20 May 2020 | ubuntu-14.04-esm, ubuntu-12.04-esm

LSN-0067-1: Kernel Live Patch Security Notice

Several security issues were fixed in the kernel.

20 May 2020 | ubuntu-16.04-lts, ubuntu-18.04-lts

USN-4364-1: Linux kernel vulnerabilities

It was discovered that the ADIS16400 IIO IMU Driver for the Linux kernel did not properly deallocate memory in certain error conditions. A local attacker could use this to cause a denial of service (memory exhaustion). (CVE-2019-19060) It was discovered that the vhost net driver in the Linux kernel contained a stack buffer overflow. A local…

19 May 2020 | ubuntu-16.04-lts, ubuntu-14.04-esm

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