Race Condition Affecting xen package, versions [,4.7.1)


Severity

Recommended
0.0
medium
0
10

CVSS assessment made by Snyk's Security Team. Learn more

Threat Intelligence

EPSS
0.06% (27th percentile)

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  • Snyk IDSNYK-UNMANAGED-XEN-2384006
  • published26 Jan 2022
  • disclosed7 Oct 2016
  • creditUnknown

Introduced: 7 Oct 2016

CVE-2016-7777  (opens in a new tab)
CWE-362  (opens in a new tab)

How to fix?

Upgrade xen to version 4.7.1 or higher.

Overview

Affected versions of this package are vulnerable to Race Condition. 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.

References

CVSS Scores

version 3.1