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CMPXCHG8B emulation in Xen 3.3.x through 4.7.x on x86 systems allows local HVM guest OS users to obtain sensitive information from host stack memory via a "supposedly-ignored" operand size prefix.
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Alpine Linux | — | Upgrade xen | Aug 30, 2017 | Jan 26, 2017 |
| Debian | — | Upgrade xen | May 10, 2017 | Jan 26, 2017 |
| Freebsd | — | Upgrade xen-kernel | Dec 14, 2016 | Dec 14, 2016 |
| Gentoo Linux | — | Upgrade app-emulation/xen-pvgrub.Upgrade app-emulation/xen.Upgrade app-emulation/xen-tools. | Oct 30, 2017 | Jan 26, 2017 |
| Redhat_linux | — | No solution exists | Jul 9, 2025 | Dec 13, 2016 |
| Suse | — | Upgrade xen-kmp-paeUpgrade xen-kmp-defaultUpgrade xen-toolsUpgrade xenUpgrade xen-doc-htmlUpgrade xen-develUpgrade xen-tools-domUUpgrade xen-libsUpgrade xen-tools-xendomains-wait-diskUpgrade xen-libs-32bitUpgrade xen-doc-pdf | Dec 21, 2016 | Dec 21, 2016 |
| Ubuntu | — | Upgrade xen | Nov 19, 2024 | Jan 26, 2017 |
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