{"id":"CVE-2021-28039","details":"An issue was discovered in the Linux kernel 5.9.x through 5.11.3, as used with Xen. In some less-common configurations, an x86 PV guest OS user can crash a Dom0 or driver domain via a large amount of I/O activity. The issue relates to misuse of guest physical addresses when a configuration has CONFIG_XEN_UNPOPULATED_ALLOC but not CONFIG_XEN_BALLOON_MEMORY_HOTPLUG.","modified":"2026-04-16T04:41:17.728700464Z","published":"2021-03-05T18:15:13.190Z","references":[{"type":"WEB","url":"https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=882213990d32fd224340a4533f6318dd152be4b2"},{"type":"ADVISORY","url":"https://security.netapp.com/advisory/ntap-20210409-0001/"},{"type":"FIX","url":"http://xenbits.xen.org/xsa/advisory-369.html"},{"type":"FIX","url":"http://www.openwall.com/lists/oss-security/2021/03/05/2"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git","events":[{"introduced":"0"},{"fixed":"882213990d32fd224340a4533f6318dd152be4b2"}]},{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git","events":[{"introduced":"0"},{"fixed":"882213990d32fd224340a4533f6318dd152be4b2"}]}],"database_specific":{"unresolved_ranges":[{"events":[{"introduced":"5.9.x"},{"last_affected":"5.11.3"}]}],"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2021-28039.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H"}]}