The p2m_pod_emergency_sweep function in arch/x86/mm/p2m-pod.c in Xen 3.4.x, 3.5.x, and 3.6.x is not preemptible, which allows local x86 HVM guest administrators to cause a denial of service (CPU consumption and possibly reboot) via crafted memory contents that triggers a "time-consuming linear scan," related to Populate-on-Demand.
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Alpine Linux | — | Upgrade xen | Sep 20, 2017 | Oct 30, 2015 |
| Debian | — | Upgrade xen | Dec 14, 2015 | Oct 30, 2015 |
| Freebsd | — | Upgrade xen-kernel | Dec 10, 2025 | Nov 11, 2015 |
| Gentoo Linux | — | Upgrade app-emulation/xen-tools.Upgrade app-emulation/xen.Upgrade app-emulation/pvgrub.Upgrade app-emulation/xen-pvgrub. | Oct 30, 2017 | Oct 30, 2015 |
| Suse | — | Upgrade xen-tools-xendomains-wait-diskUpgrade xen-develUpgrade xenUpgrade xen-tools-domUUpgrade xen-kmp-traceUpgrade xen-doc-pdfUpgrade xen-doc-htmlUpgrade xen-kmp-defaultUpgrade xen-libs-32bitUpgrade xen-toolsUpgrade xen-libsUpgrade xen-kmp-pae | Dec 18, 2015 | Oct 30, 2015 |
| Ubuntu | — | Upgrade xen | Nov 19, 2024 | Oct 30, 2015 |
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