CVE-2016-3159 Information disclosure in n/a

What is CVE-2016-3159?

CVE-2016-3159 is a low-severity vulnerability in Debian Debian Linux, 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 fpu_fxrstor function in arch/x86/i387.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-2016-3159?

It affects 4 products.

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

How do I fix CVE-2016-3159?

Apply the vendor's patch.

Is CVE-2016-3159 being exploited?

There is no known exploitation of CVE-2016-3159 in the wild and no public exploit code.

Other vulnerabilities in Debian Debian Linux

• CVE-2015-3306 ProFTPD Improper Access Control Exploited Critical 10.0
• CVE-2025-49113 RoundCube Webmail Deserialization of Untrusted Data Exploited Critical 9.9
• CVE-2026-24061 GNU InetUtils Argument Injection Exploited Critical 9.8
• CVE-2025-39682 Linux Kernel Improper Check for Unusual or Exceptional Conditions Exploited Critical 9.8
• CVE-2024-9680 Mozilla Firefox Use-After-Free Exploited Critical 9.8

All Debian Debian Linux vulnerabilities

Sources

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

Also known as DEBIAN-CVE-2016-3159, GHSA-h55q-7cr6-wwr6, UBUNTU-CVE-2016-3159.