CVE-2016-7777

EUVD-2016-8627
Xen 4.7.x and earlier does not properly honor CR0.TS and CR0.EM, which allows local x86 HVM guest OS users to read or modify FPU, MMX, or XMM register state information belonging to arbitrary tasks on the guest by modifying an instruction while the hypervisor is preparing to emulate it.
Race Condition
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
NISTPrimary
6.3 MEDIUM
LOCAL
HIGH
LOW
CVSS:3.0/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:N
Base Score
CVSS 3.x
EPSS Score
Percentile: 31%
Affected Products (NVD)
VendorProductVersion
xenxen
𝑥
≤ 4.7.0
𝑥
= Vulnerable software versions
Debian logo
Debian Releases
Debian Product
Codename
xen
bookworm
4.17.3+10-g091466ba55-1~deb12u1
fixed
bullseye
4.14.6-1
fixed
bullseye (security)
4.14.5+94-ge49571868d-1
fixed
sid
4.17.3+36-g54dacb5c02-1
fixed
trixie
4.17.3+36-g54dacb5c02-1
fixed
Ubuntu logo
Ubuntu Releases
Ubuntu Product
Codename
xen
precise
Fixed 4.1.6.1-0ubuntu0.12.04.12
released
trusty
Fixed 4.4.2-0ubuntu0.14.04.7
released
xenial
Fixed 4.6.0-1ubuntu4.2
released
Common Weakness Enumeration
References
http://www.securityfocus.com/bid/93344
http://www.securitytracker.com/id/1036942
http://xenbits.xen.org/xsa/advisory-190.html
https://security.gentoo.org/glsa/201611-09
https://support.citrix.com/article/CTX217363
http://www.securityfocus.com/bid/93344
http://www.securitytracker.com/id/1036942
http://xenbits.xen.org/xsa/advisory-190.html
https://security.gentoo.org/glsa/201611-09
https://support.citrix.com/article/CTX217363