{"id":"CVE-2018-16882","details":"A use-after-free issue was found in the way the Linux kernel's KVM hypervisor processed posted interrupts when nested(=1) virtualization is enabled. In nested_get_vmcs12_pages(), in case of an error while processing posted interrupt address, it unmaps the 'pi_desc_page' without resetting 'pi_desc' descriptor address, which is later used in pi_test_and_clear_on(). A guest user/process could use this flaw to crash the host kernel resulting in DoS or potentially gain privileged access to a system. Kernel versions before 4.14.91 and before 4.19.13 are vulnerable.","modified":"2026-04-16T04:37:15.402629050Z","published":"2019-01-03T16:29:00.303Z","related":["SUSE-SU-2021:3929-1","SUSE-SU-2021:3935-1"],"references":[{"type":"ADVISORY","url":"https://usn.ubuntu.com/3871-4/"},{"type":"ADVISORY","url":"https://usn.ubuntu.com/3871-5/"},{"type":"ADVISORY","url":"https://usn.ubuntu.com/3872-1/"},{"type":"ADVISORY","url":"https://usn.ubuntu.com/3878-1/"},{"type":"ADVISORY","url":"https://lwn.net/Articles/775720/"},{"type":"ADVISORY","url":"https://support.f5.com/csp/article/K80557033"},{"type":"ADVISORY","url":"https://usn.ubuntu.com/3871-1/"},{"type":"ADVISORY","url":"https://usn.ubuntu.com/3871-3/"},{"type":"ADVISORY","url":"https://usn.ubuntu.com/3878-2/"},{"type":"ADVISORY","url":"http://www.securityfocus.com/bid/106254"},{"type":"ADVISORY","url":"https://lwn.net/Articles/775721/"},{"type":"FIX","url":"https://marc.info/?l=kvm&m=154514994222809&w=2"},{"type":"FIX","url":"https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2018-16882"}],"affected":[{"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2018-16882.json","unresolved_ranges":[{"events":[{"introduced":"4.14"},{"fixed":"4.14.91"}]},{"events":[{"introduced":"4.15"},{"fixed":"4.19.13"}]},{"events":[{"introduced":"0"},{"last_affected":"14.04"}]},{"events":[{"introduced":"0"},{"last_affected":"16.04"}]},{"events":[{"introduced":"0"},{"last_affected":"18.04"}]},{"events":[{"introduced":"0"},{"last_affected":"18.10"}]}]}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H"}]}