CVE-2016-3159
The fpu_fxrstor function in arch/x86/i387.c in Xen 4.x does not properly handle writes to the hardware FSW.ES bit when running on AMD64…
- Published
- Updated
- Reserved
- Assigned by
- mitre
Description
The fpu_fxrstor function in arch/x86/i387.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.
Timeline
ID reserved
By mitre
- 29 days later
· 29 days later
Published
- 8 years later
· 8 years later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| NVDNVD · Modified | 3.0 | Low3.8 | CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:C/C:L/I:N/A:N |
- EPSS (exploitation in 30 days)
- 0.40% · top 66% of all CVEs (8 Nov 2026)
The list uses the assigner's score when there is one, then CISA's, then NVD's: Low 3.8.
Weakness
Affected products
n/a
- affected n/a
References (9)
- http://www.oracle.com/technetwork/topics/security/ovmbulletinjul2016-3090546.html (opens in a new tab)x_refsource_CONFIRMx_transferred
- FEDORA-2016-5f196e4e4a (opens in a new tab)vendor-advisoryx_refsource_FEDORAx_transferred
- http://xenbits.xen.org/xsa/advisory-172.html (opens in a new tab)x_refsource_CONFIRMx_transferred
- 85716 (opens in a new tab)vdb-entryx_refsource_BIDx_transferred
- FEDORA-2016-e5432ca977 (opens in a new tab)vendor-advisoryx_refsource_FEDORAx_transferred
- http://xenbits.xen.org/xsa/xsa172.patch (opens in a new tab)x_refsource_CONFIRMx_transferred
- 1035435 (opens in a new tab)vdb-entryx_refsource_SECTRACKx_transferred
- http://support.citrix.com/article/CTX209443 (opens in a new tab)x_refsource_CONFIRMx_transferred
- DSA-3554 (opens in a new tab)vendor-advisoryx_refsource_DEBIANx_transferred
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://cveledger.app/cve/CVE-2016-3159)Record last updated .