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USN-3160-1: Linux kernel vulnerabilities Ubuntu Security Notice USN-3160-1 20th December, 2016 linux vulnerabilities A security issue affects these releases of Ubuntu and its derivatives: Ubuntu 14.04 LTS Summary Several security issues were fixed in the kernel. Software description linux – Linux kernel Details CAI Qian discovered that shared bind mounts in a mount namespaceexponentially added entries without restriction to the Linux kernel's mounttable. A local attacker could use this to cause a denial of service (systemcrash). (CVE-2016-6213) It was discovered that a race condition existed in the procfsenviron_read function in the Linux kernel, leading to an integerunderflow. A local attacker could use this to expose sensitiveinformation (kernel memory). (CVE-2016-7916) Update instructions The problem can be corrected by updating your system to the following package version: Ubuntu 14.04 LTS: linux-image-powerpc-smp 3.13.0.106.114 linux-image-powerpc-e500mc 3.13.0.106.114 linux-image-3.13.0-106-powerpc64-emb 3.13.0-106.153 linux-image-3.13.0-106-lowlatency 3.13.0-106.153 linux-image-3.13.0-106-generic 3.13.0-106.153 linux-image-generic 3.13.0.106.114 [ more… ]

USN-3160-2: Linux kernel (Trusty HWE) vulnerabilities Ubuntu Security Notice USN-3160-2 20th December, 2016 linux-lts-trusty vulnerabilities A security issue affects these releases of Ubuntu and its derivatives: Ubuntu 12.04 LTS Summary Several security issues were fixed in the kernel. Software description linux-lts-trusty – Linux hardware enablement kernel from Trusty for Precise Details USN-3160-1 fixed vulnerabilities in the Linux kernel for Ubuntu 14.04LTS. This update provides the corresponding updates for the LinuxHardware Enablement (HWE) kernel from Ubuntu 14.04 LTS for Ubuntu12.04 LTS. CAI Qian discovered that shared bind mounts in a mount namespaceexponentially added entries without restriction to the Linux kernel's mounttable. A local attacker could use this to cause a denial of service (systemcrash). (CVE-2016-6213) It was discovered that a race condition existed in the procfsenviron_read function in the Linux kernel, leading to an integerunderflow. A local attacker could use this [ more… ]