An issue was discovered in Xen through 4.14.x allowing x86 HVM and PVH guest OS users to cause a denial of service (data corruption), cause a data leak, or possibly gain privileges because coalescing of per-page IOMMU TLB flushes is mishandled.Referenceshttp://xenbits.xen.org/xsa/advisory-346.htmlhttps://xenbits.xen.org/xsa/advisory-346.htmlhttp://lists.opensuse.org/opensuse-security-announce/2020-10/msg00075.htmlhttp://lists.opensuse.org/opensuse-security-announce/2020-11/msg00025.htmlhttps://security.gentoo.org/glsa/202011-06https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/XIK57QJOVOPWH6RFRNMGOBCROBCKMDG2/https://www.debian.org/security/2020/dsa-4804http://www.openwall.com/lists/oss-security/2021/01/19/8
