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Xen 4.0.x through 4.7.x mishandle x86 task switches to VM86 mode, which allows local 32-bit x86 HVM guest OS users to gain privileges or cause a denial of service (guest OS crash) by leveraging a guest operating system that uses hardware task switching and allows a new task to start in VM86 mode.
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Alpine Linux | — | Upgrade xen | Sep 20, 2017 | Jan 23, 2017 |
| Debian | — | Upgrade xen | Dec 9, 2016 | Dec 7, 2016 |
| Freebsd | — | Upgrade xen-kernel | Dec 4, 2016 | Dec 4, 2016 |
| Gentoo Linux | — | Upgrade app-emulation/xen-tools.Upgrade app-emulation/xen.Upgrade app-emulation/xen-pvgrub. | Oct 30, 2017 | Jan 23, 2017 |
| Suse | — | Upgrade xen-doc-htmlUpgrade xenUpgrade xen-tools-domUUpgrade xen-kmp-traceUpgrade xen-kmp-paeUpgrade xen-libs-32bitUpgrade xen-tools-xendomains-wait-diskUpgrade xen-kmp-defaultUpgrade xen-doc-pdfUpgrade xen-develUpgrade xen-libsUpgrade xen-tools | Dec 9, 2016 | Dec 7, 2016 |
| Ubuntu | — | Upgrade xen | Nov 19, 2024 | Jan 23, 2017 |
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