CVE-2016-3158 — Vulnetix

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CVE-2016-3158 PUBLISHED

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.

EPSS 0.04% · 10.5th percentile

Risk Scores

EPSS Score

0.04%

10.5th percentile

Affected Products

Vendor	Product	Versions
Ubuntu:14.04:LTS	xen	0, 4.3.0-1ubuntu1, 4.3.0-1ubuntu2
Ubuntu:16.04:LTS	xen	0, 4.5.1-0ubuntu1, 4.5.1-0ubuntu2

Timeline

Apr 13, 2016 CVE Published
Feb 4, 2022 EPSS Score
Mar 28, 2022 EPSS Score
May 19, 2022 EPSS Score
Jul 10, 2022 EPSS Score
Sep 1, 2022 EPSS Score
Oct 23, 2022 EPSS Score
Dec 14, 2022 EPSS Score
Feb 4, 2023 EPSS Score
Mar 7, 2023 EPSS Score
Mar 28, 2023 EPSS Score
May 19, 2023 EPSS Score

References

https://ubuntu.com/security/CVE-2016-3158 third-party-advisory
http://xenbits.xen.org/xsa/advisory-172.html third-party-advisory
https://www.cve.org/CVERecord?id=CVE-2016-3158 third-party-advisory

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