CVE-2017-7228
The earlier XSA-29 fix introduced an insufficient check on XENMEM_exchange input, allowing the caller to drive hypervisor memory accesses outside of the guest provided input/output arrays.
Does this matter?
A public exploit is published in Exploit-DB (verified) and the impact is high, while EPSS rates exploitation at 1.6%. Anyone can run this; patch or mitigate before the next change window and check exposed instances for signs of use.
Description
An issue (known as XSA-212) was discovered in Xen, with fixes available for 4.8.x, 4.7.x, 4.6.x, 4.5.x, and 4.4.x. The earlier XSA-29 fix introduced an insufficient check on XENMEM_exchange input, allowing the caller to drive hypervisor memory accesses outside of the guest provided input/output arrays.
- CVSS 3.0
- 8.2 HIGHCVSS:3.0/AV:L/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H
- EPSS
- 1.57% probability · 75th percentile
- Public exploits
- 1 in Exploit-DB · verified · first 11 April 2017
- CISA KEV
- Not listed
- Weakness
- CWE-129
- Affected
- xen/xen
- Source
- cve@mitre.org
EPSS 1.6% since 27 October 2026; no change recorded yet. Points are recorded when the score first appears and whenever it moves by a percentage point or more.
Public exploits (1)
Entries in Exploit-DB that cite this CVE. Links go to the Exploit-DB page and to the file in the public repository; nothing is hosted here. A verified tick means the Exploit-DB team confirmed the exploit works against the stated version.
References
- http://openwall.com/lists/oss-security/2017/04/04/3Mailing List, Third Party Advisory
- http://www.debian.org/security/2017/dsa-3847
- http://www.securityfocus.com/bid/97375Third Party Advisory, VDB Entry
- http://www.securitytracker.com/id/1038223
- http://xenbits.xen.org/xsa/advisory-212.htmlPatch, Vendor Advisory
- https://github.com/QubesOS/qubes-secpack/blob/master/QSBs/qsb-029-2017.txt
- https://googleprojectzero.blogspot.com/2017/04/pandavirtualization-exploiting-xen.htmlTechnical Description, Third Party Advisory
- https://www.exploit-db.com/exploits/41870/
- http://openwall.com/lists/oss-security/2017/04/04/3Mailing List, Third Party Advisory
- http://www.debian.org/security/2017/dsa-3847
- http://www.securityfocus.com/bid/97375Third Party Advisory, VDB Entry
- http://www.securitytracker.com/id/1038223
- http://xenbits.xen.org/xsa/advisory-212.htmlPatch, Vendor Advisory
- https://github.com/QubesOS/qubes-secpack/blob/master/QSBs/qsb-029-2017.txt
- https://googleprojectzero.blogspot.com/2017/04/pandavirtualization-exploiting-xen.htmlTechnical Description, Third Party Advisory
- https://www.exploit-db.com/exploits/41870/
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.