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CVE-2013-2076

MEDIUM · CVSS 4.3EPSS 0.5%EU EUVD

Xen 4.0.x, 4.1.x, and 4.2.x, when running on AMD64 processors, only save/restore the FOP, FIP, and FDP x87 registers in FXSAVE/FXRSTOR when an exception is pending, which allows one domain to determine portions of the state of floating point instructions of other domains, which can be leveraged to obtain sensitive information such as cryptographic keys, a similar vulnerability to CVE-2006-1056. NOTE: this is the documented behavior of AMD64 processors, but it is inconsistent with Intel processors in a security-relevant fashion that was not addressed by the kernels.

Key facts

CVSS score
4.3 (v2.0)
Severity
MEDIUM
CVSS vector
AV:A/AC:H/Au:S/C:C/I:N/A:N
Weakness (CWE)
CWE-200
EPSS score
0.5% (43th percentile)
In CISA KEV
No
In EU EUVD
Yes (EUVD-2013-2055)
Published
August 28, 2013
NVD last modified
June 16, 2026
Status
Modified

EU Vulnerability Database (EUVD)

This vulnerability is also tracked by ENISA as EUVD-2013-2055 in the EU Vulnerability Database. Last updated in EUVD on August 6, 2024.

View on the EU Vulnerability Database

Affected products

  • xen / xen
  • xen / xen
  • xen / xen
  • xen / xen
  • xen / xen
  • xen / xen
  • xen / xen
  • xen / xen
  • xen / xen
  • xen / xen
  • xen / xen
  • xen / xen
  • xen / xen
  • xen / xen

References

Last updated September 17, 2026 · Source: NVD, CISA KEV, FIRST.org EPSS

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