CVE-2016-3158: fedoraproject fedora
Vulnerability summary
CVE-2016-3158 is a low (CVSS 3.8) vulnerability in fedoraproject fedora. EPSS estimates a 0.41% chance of exploitation in the next 30 days, higher than 35.3% of scored vulnerabilities.
Not severe (CVSS 3.8, local access); no exploitation reported by the 5 checked sources
Source freshness unavailable
How is this decided?Advisory lineage
Upstream 0 · Downstream 8 · Related 5Timeline
- 13-04-2016PublishedVulnerability first disclosed.
- 05-08-2024Last modifiedVulnerability information updated.
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 metrics
4 scores · 3 sources · 2 versions- OSV · UbuntuEcosystem advisory · calculated3.8LowCVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:C/C:L/I:N/A:N
- OSV · DebianEcosystem advisory · calculated3.8LowCVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:C/C:L/I:N/A:N
EPSS trend
Probability
0.41%
Chance of exploitation in the next 30 days
Percentile
35%
Versus all other CVEs
30-day change
No change 0.00 pp
From 0.41% on 04-10-2026
Known exploited
Compare KEV catalogs
CISA KEVNot in the CISA KEV catalog.
ENISA CNWNot in the ENISA CNW catalog.
CIRCLNot in the CIRCL catalog.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root cause- CWE-200Exposure of Sensitive Information to an Unauthorized ActorThe product exposes sensitive information to an actor that is not explicitly authorized to have access to that information.
- CWE-284Improper Access ControlThe product does not restrict or incorrectly restricts access to a resource from an unauthorized actor.
Affected systems
Known conditions: local access, low-privilege account, no user interaction (CVSS vector). Other conditions: not stated in public data.
Debian1 product
- xen< 4.8.0~rc3-1
Fedoraproject1 product
- fedoraEOL22 | 23
Oracle1 product
- vm_server3.3 | 3.4
Ubuntu1 product
- xen< 4.4.2-0ubuntu0.14.04.6 | < 4.6.0-1ubuntu4.1
Xen1 product
- xen≤ 4.4.0
5 vendors · 5 products
References
13 links- www.oracle.com/technetwork/topics/security/ovmbulletinjul2016-3090546.htmlX Refsource CONFIRMVendor Advisory
- lists.fedoraproject.org/pipermail/package-announce/2016-April/181699.htmlVendor AdvisoryX Refsource FEDORAThird Party Advisory
- lists.fedoraproject.org/pipermail/package-announce/2016-April/181729.htmlVendor AdvisoryX Refsource FEDORAThird Party Advisory
- support.citrix.com/article/CTX209443X Refsource CONFIRM
