CVE-2020-27674

An issue was discovered in Xen through 4.14.x allowing x86 PV guest OS users to gain guest OS privileges by modifying kernel memory contents, because invalidation of TLB entries is mishandled during use of an INVLPG-like attack technique.

• CWE-787

• http://www.openwall.com/lists/oss-security/2021/01/19/5Mailing List, Third Party Advisory
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/PZAM3LYJ5TZLSSNL3KXFILM46QKVTOUA/
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/U3U4LNKKXU4UP4Z5XP6TMIWSML3QODPE/
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/XIK57QJOVOPWH6RFRNMGOBCROBCKMDG2/
• https://security.gentoo.org/glsa/202011-06Third Party Advisory
• https://www.debian.org/security/2020/dsa-4804Third Party Advisory
• https://xenbits.xen.org/xsa/advisory-286.htmlPatch, Vendor Advisory
• http://www.openwall.com/lists/oss-security/2021/01/19/5Mailing List, Third Party Advisory
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/PZAM3LYJ5TZLSSNL3KXFILM46QKVTOUA/
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/U3U4LNKKXU4UP4Z5XP6TMIWSML3QODPE/
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/XIK57QJOVOPWH6RFRNMGOBCROBCKMDG2/
• https://security.gentoo.org/glsa/202011-06Third Party Advisory
• https://www.debian.org/security/2020/dsa-4804Third Party Advisory
• https://xenbits.xen.org/xsa/advisory-286.htmlPatch, Vendor Advisory

Published

Oct 22, 2020

Last Modified

Jun 17, 2026

Status

Modified

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