The pygrub boot loader emulator in Xen, when nul-delimited output format is requested, allows local pygrub-using guest OS administrators to read or delete arbitrary files on the host via NUL bytes in the bootloader configuration file.
| 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-tools | Dec 4, 2016 | Dec 4, 2016 |
| Gentoo Linux | — | Upgrade app-emulation/xen-pvgrub.Upgrade app-emulation/xen-tools.Upgrade app-emulation/xen. | Oct 30, 2017 | Jan 23, 2017 |
| Redhat_linux | — | No solution exists | Jul 9, 2025 | Nov 22, 2016 |
| Suse | — | Upgrade xen-kmp-defaultUpgrade xen-tools-xendomains-wait-diskUpgrade xen-doc-htmlUpgrade xen-libsUpgrade xen-kmp-traceUpgrade xen-kmp-paeUpgrade xen-libs-32bitUpgrade xen-tools-domUUpgrade xenUpgrade xen-toolsUpgrade xen-develUpgrade xen-doc-pdf | Dec 9, 2016 | Dec 7, 2016 |
| Ubuntu | — | Upgrade xen | Nov 19, 2024 | Jan 23, 2017 |
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