CVE-2016-3158 Information disclosure in n/a

What is CVE-2016-3158?

CVE-2016-3158 is a low-severity vulnerability in Fedoraproject Fedora, published on 13 Apr 2016. It can only be exploited from the same machine or local network, with no action from the victim.

Official description

The xrstor function in arch/x86/xstate.c in Xen 4.x does not properly handle writes to the hardware FSW.ES bit when running on AMD64 processors, which allows local guest OS users to obtain sensitive register content information from another guest by leveraging pending exception and mask bits. NOTE: this vulnerability exists because of an incorrect fix for CVE-2013-2076.

Weakness: CWE-284, CWE-200

Which versions are affected by CVE-2016-3158?

It affects 3 products.

Products include Fedoraproject Fedora, Oracle Vm Server, Xen Xen.

How do I fix CVE-2016-3158?

Apply the vendor's patch.

Is CVE-2016-3158 being exploited?

There is no known exploitation of CVE-2016-3158 in the wild and no public exploit code.

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All Fedoraproject Fedora vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as DEBIAN-CVE-2016-3158, GHSA-96jh-8f37-hfp8, UBUNTU-CVE-2016-3158.