CVE-2016-3158

CWE-200 — Information ExposureCWE-284 — Improper Access Control8 documents7 sources
Severity
3.8LOW
EPSS
0.0%
top 89.34%
CISA KEV
Not in KEV
Exploit
No known exploits
Affected products
3
XEN XENFedoraproject FedoraOracle VM Server
Timeline
PublishedApr 13
Latest updateMay 17

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.

CVSS vector

CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:C/C:L/I:N/A:NExploitability: 2.0 | Impact: 1.4

Affected Packages3 packages

▶Debianxen< 4.8.0~rc3-1+3
▶NVDxen/xen4.4.0
▶NVDoracle/vm_server3.3, 3.4+1

Also affects: Fedora 22, 23

Patches

Patch: xenbits.xen.org ↗Patch: xenbits.xen.org ↗Patch: xenbits.xen.org ↗

🔴Vulnerability Details

3
GHSA
GHSA-96jh-8f37-hfp8: The xrstor function in arch/x86/xstate↗2022-05-17
▶
OSV
CVE-2016-3158: The xrstor function in arch/x86/xstate↗2016-04-13
▶
CVEList
CVE-2016-3158: The xrstor function in arch/x86/xstate↗2016-04-13
▶

📋Vendor Advisories

2
Red Hat
xen: AMD FPU FIP/FDP/FOP leak workaround broken (XSA-172)↗2016-03-24
▶
Debian
CVE-2016-3158: xen - The xrstor function in arch/x86/xstate.c in Xen 4.x does not properly handle wri...↗2016
▶

💬Community

2
Bugzilla
CVE-2016-3158 CVE-2016-3159 xen: AMD FPU FIP/FDP/FOP leak workaround broken (XSA-172) [fedora-all]↗2016-03-29
▶
Bugzilla
CVE-2016-3158 CVE-2016-3159 xen: AMD FPU FIP/FDP/FOP leak workaround broken (XSA-172)↗2016-03-15
▶
CVE-2016-3158 (LOW CVSS 3.8) | The xrstor function in arch/x86/xst | cvebase.io