CVE-2017-7228 — An issue (known as XSA-212) was discovered in Xen, with fixes available for 4

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 provid

01What is this vulnerability?

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.

02Affected products

No structured affected-product list available — see references below for vendor advisories.

03Active exploitation status

Not currently listed on the CISA Known Exploited Vulnerabilities (KEV) catalog. EPSS is the best forward-looking signal — see the EPSS row above.

04Recommended remediation

• Patch to a fixed version listed in the vendor advisory (see references below).
• Mitigate with WAF rules, network egress filters, or feature flags where the patch is not yet available.
• Hunt historical logs for exploitation indicators — see Detection signatures below.

05Technical details

For the full vendor write-up, exploit chains, and reference implementations, see the references list in section 09.

06Detection signatures

Ask SARA in chat to draft a starting detection for this CVE in your stack of choice.

07Related CVEs

No directly-cited follow-up CVEs in the KB record for this advisory. The references list in section 09 carries the vendor cross-references.

08Timeline

• Published: 2017-04-04T14:59:00.243
• Last modified: 2026-05-13T00:24:29.033

09References

• openwall.com — http://openwall.com/lists/oss-security/2017/04/04/3
• www.debian.org — http://www.debian.org/security/2017/dsa-3847
• www.securityfocus.com — http://www.securityfocus.com/bid/97375
• www.securitytracker.com — http://www.securitytracker.com/id/1038223
• xenbits.xen.org — http://xenbits.xen.org/xsa/advisory-212.html
• github.com — https://github.com/QubesOS/qubes-secpack/blob/master/QSBs/qsb-029-2017.txt
• googleprojectzero.blogspot.com — https://googleprojectzero.blogspot.com/2017/04/pandavirtualization-exploiting-xe…
• www.exploit-db.com — https://www.exploit-db.com/exploits/41870/
• openwall.com — http://openwall.com/lists/oss-security/2017/04/04/3
• www.debian.org — http://www.debian.org/security/2017/dsa-3847