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Ubuntu Security Notice USN-2516-2
Posted Mar 2, 2015
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 2516-2 - USN-2516-1 fixed vulnerabilities in the Linux kernel. There was an unrelated regression in the use of the virtual counter (CNTVCT) on arm64 architectures. This update fixes the problem. A flaw was discovered in the Kernel Virtual Machine's (KVM) emulation of the SYSTENTER instruction when the guest OS does not initialize the SYSENTER MSRs. A guest OS user could exploit this flaw to cause a denial of service of the guest OS (crash) or potentially gain privileges on the guest OS. Various other issues were also addressed.

tags | advisory, denial of service, kernel, vulnerability
systems | linux, ubuntu
advisories | CVE-2014-8133, CVE-2014-8160, CVE-2014-8559, CVE-2014-8989, CVE-2014-9419, CVE-2014-9420, CVE-2014-9428, CVE-2014-9529, CVE-2014-9584, CVE-2014-9585, CVE-2014-9683, CVE-2015-0239
SHA-256 | 76903f6b56698c4952e01e1d34693ec01de15214367c1003f5d4153b94ec442f

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