{"id":"CVE-2021-28706","aliases":["ALPINE-CVE-2021-28706","DEBIAN-CVE-2021-28706","DSA-5017-1","EUVD-2021-15363","GHSA-x89c-76jf-xx4h","SUSE-SU-2021:14848-1","SUSE-SU-2021:3813-1","SUSE-SU-2021:3842-1","SUSE-SU-2021:3849-1","SUSE-SU-2021:3851-1","SUSE-SU-2021:3852-1","SUSE-SU-2021:3888-1","SUSE-SU-2021:3968-1","SUSE-SU-2021:3977-1","UBUNTU-CVE-2021-28706","openSUSE-SU-2021:1543-1","openSUSE-SU-2021:3968-1"],"status":"published","title":"guests may exceed their designated memory limit When a guest is permitted to have close to 16TiB...","description":"guests may exceed their designated memory limit When a guest is permitted to have close to 16TiB of memory, it may be able to issue hypercalls to increase its memory allocation beyond the administrator established limit. This is a result of a calculation done with 32-bit precision, which may overflow. It would then only be the overflowed (and hence small) number which gets compared against the established upper bound.","severity":{"version":"3.1","score":8.6,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H","level":"high","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-11","score":0.02233,"percentile":0.83008,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-770"],"published":"2021-11-24T00:00:00Z","modified":"2026-10-23T18:03:12Z","fixes":[{"ecosystem":"Alpine:v3.11","package":"xen","fixed_in":["4.13.4-r2"],"sources":["osv"]},{"ecosystem":"Alpine:v3.12","package":"xen","fixed_in":["4.13.4-r2","4.13.4-r3"],"sources":["osv"]},{"ecosystem":"Alpine:v3.13","package":"xen","fixed_in":["4.14.5-r0"],"sources":["osv"]},{"ecosystem":"Alpine:v3.14","package":"xen","fixed_in":["4.15.2-r0"],"sources":["osv"]},{"ecosystem":"Alpine:v3.15","package":"xen","fixed_in":["4.15.2-r0"],"sources":["osv"]},{"ecosystem":"Debian:12","package":"xen","fixed_in":["4.14.3+32-g9de3671772-1"],"sources":["osv"]},{"ecosystem":"Debian:13","package":"xen","fixed_in":["4.14.3+32-g9de3671772-1"],"sources":["osv"]},{"ecosystem":"Debian:14","package":"xen","fixed_in":["4.14.3+32-g9de3671772-1"],"sources":["osv"]}],"affected":[{"source":"osv","ecosystem":"Alpine:v3.11","package":"xen","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"3.2"},{"fixed":"4.13.4-r2"}]}]},{"source":"osv","ecosystem":"Alpine:v3.12","package":"xen","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"3.2"},{"fixed":"4.13.4-r2"},{"fixed":"4.13.4-r3"}]}]},{"source":"osv","ecosystem":"Alpine:v3.13","package":"xen","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"3.2"},{"fixed":"4.14.5-r0"}]}]},{"source":"osv","ecosystem":"Alpine:v3.14","package":"xen","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"3.2"},{"fixed":"4.15.2-r0"}]}]},{"source":"osv","ecosystem":"Alpine:v3.15","package":"xen","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"3.2"},{"fixed":"4.15.2-r0"}]}]},{"source":"osv","ecosystem":"Debian:12","package":"xen","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.14.3+32-g9de3671772-1"}]}]},{"source":"osv","ecosystem":"Debian:13","package":"xen","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.14.3+32-g9de3671772-1"}]}]},{"source":"osv","ecosystem":"Debian:14","package":"xen","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.14.3+32-g9de3671772-1"}]}]},{"source":"osv","ecosystem":"Debian:11","package":"xen","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.14.3+32-g9de3671772-1~deb11u1"}]}],"versions":["4.14.2+25-gb6a8c4f72d-2","4.14.3-1","4.14.3-1~deb11u1"],"bundled":7},{"source":"osv","ecosystem":"SUSE:Linux Enterprise Server 11 SP4-LTSS","package":"xen","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.4.4_50-61.67.1"}]}],"bundled":17},{"source":"osv","ecosystem":"SUSE:Linux Enterprise Server 12 SP2-BCL","package":"xen","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.7.6_18-43.82.1"}]}],"bundled":6},{"source":"osv","ecosystem":"SUSE:Linux Enterprise High Performance Computing 15-ESPOS","package":"xen","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.10.4_30-3.68.1"}]}],"bundled":7},{"source":"osv","ecosystem":"SUSE:Linux Enterprise High Performance Computing 15-LTSS","package":"xen","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.10.4_30-3.68.1"}]}],"bundled":7},{"source":"osv","ecosystem":"SUSE:Linux Enterprise Server for SAP Applications 15","package":"xen","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.10.4_30-3.68.1"}]}],"bundled":7},{"source":"osv","ecosystem":"SUSE:OpenStack Cloud 9","package":"xen","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.11.4_24-2.65.1"}]}],"bundled":7},{"source":"osv","ecosystem":"SUSE:OpenStack Cloud Crowbar 9","package":"xen","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.11.4_24-2.65.1"}]}],"bundled":7},{"source":"osv","ecosystem":"SUSE:Linux Enterprise Server for SAP Applications 12 SP4","package":"xen","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.11.4_24-2.65.1"}]}],"bundled":7},{"source":"osv","ecosystem":"SUSE:Linux Enterprise Server 12 SP4-LTSS","package":"xen","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.11.4_24-2.65.1"}]}],"bundled":7},{"source":"osv","ecosystem":"SUSE:HPE Helion OpenStack 8","package":"xen","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.9.4_24-3.97.1"}]}],"bundled":6},{"source":"osv","ecosystem":"SUSE:OpenStack Cloud 8","package":"xen","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.9.4_24-3.97.1"}]}],"bundled":6},{"source":"osv","ecosystem":"SUSE:OpenStack Cloud Crowbar 8","package":"xen","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.9.4_24-3.97.1"}]}],"bundled":6},{"source":"osv","ecosystem":"SUSE:Linux Enterprise Server for SAP Applications 12 SP3","package":"xen","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.9.4_24-3.97.1"}]}],"bundled":6},{"source":"osv","ecosystem":"SUSE:Linux Enterprise Server 12 SP3-LTSS","package":"xen","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.9.4_24-3.97.1"}]}],"bundled":6},{"source":"osv","ecosystem":"SUSE:Linux Enterprise Server 12 SP3-BCL","package":"xen","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.9.4_24-3.97.1"}]}],"bundled":6},{"source":"osv","ecosystem":"SUSE:Linux Enterprise Software Development Kit 12 SP5","package":"xen","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.12.4_16-3.55.1"}]}],"bundled":7},{"source":"osv","ecosystem":"SUSE:Linux Enterprise Server 12 SP5","package":"xen","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.12.4_16-3.55.1"}]}],"bundled":7},{"source":"osv","ecosystem":"SUSE:Linux Enterprise Server for SAP Applications 12 SP5","package":"xen","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.12.4_16-3.55.1"}]}],"bundled":7},{"source":"osv","ecosystem":"SUSE:Linux Enterprise Module for Basesystem 15 SP2","package":"xen","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.13.4_02-3.40.1"}]}],"bundled":7},{"source":"osv","ecosystem":"SUSE:Linux Enterprise Module for Server Applications 15 SP2","package":"xen","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.13.4_02-3.40.1"}]}],"bundled":7},{"source":"osv","ecosystem":"SUSE:Linux Enterprise Micro 5.0","package":"xen","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.13.4_02-3.40.1"}]}],"bundled":7},{"source":"osv","ecosystem":"SUSE:Linux Enterprise Module for Basesystem 15 SP3","package":"xen","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.14.3_04-3.15.1"}]}],"bundled":7},{"source":"osv","ecosystem":"SUSE:Linux Enterprise Module for Server Applications 15 SP3","package":"xen","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.14.3_04-3.15.1"}]}],"bundled":7},{"source":"osv","ecosystem":"SUSE:Linux Enterprise Micro 5.1","package":"xen","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.14.3_04-3.15.1"}]}],"bundled":7},{"source":"osv","ecosystem":"SUSE:Linux Enterprise High Performance Computing 15 SP1-ESPOS","package":"xen","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.12.4_16-3.57.1"}]}],"bundled":8},{"source":"osv","ecosystem":"SUSE:Linux Enterprise High Performance Computing 15 SP1-LTSS","package":"xen","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.12.4_16-3.57.1"}]}],"bundled":8},{"source":"osv","ecosystem":"SUSE:Linux Enterprise Server 15 SP1-BCL","package":"xen","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.12.4_16-3.57.1"}]}],"bundled":8},{"source":"osv","ecosystem":"SUSE:Linux Enterprise Server 15 SP1-LTSS","package":"xen","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.12.4_16-3.57.1"}]}],"bundled":8},{"source":"osv","ecosystem":"SUSE:Linux Enterprise Server for SAP Applications 15 SP1","package":"xen","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.12.4_16-3.57.1"}]}],"bundled":8},{"source":"osv","ecosystem":"SUSE:Enterprise Storage 6","package":"xen","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.12.4_16-3.57.1"}]}],"bundled":8},{"source":"osv","ecosystem":"Ubuntu:16.04:LTS","package":"xen","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["4.5.1-0ubuntu1","4.5.1-0ubuntu2","4.6.0-1ubuntu1","4.6.0-1ubuntu2","4.6.0-1ubuntu4","4.6.0-1ubuntu4.1","4.6.0-1ubuntu4.2","4.6.0-1ubuntu4.3","4.6.5-0ubuntu1","4.6.5-0ubuntu1.1","4.6.5-0ubuntu1.2","4.6.5-0ubuntu1.4"]},{"source":"osv","ecosystem":"Ubuntu:18.04:LTS","package":"xen","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["4.9.0-0ubuntu3","4.9.0-0ubuntu4","4.9.2-0ubuntu1"]},{"source":"osv","ecosystem":"Ubuntu:20.04:LTS","package":"xen","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["4.9.2-0ubuntu2","4.9.2-0ubuntu6","4.9.2-0ubuntu7","4.11.3+24-g14b62ab3e5-1ubuntu1","4.11.3+24-g14b62ab3e5-1ubuntu2","4.11.3+24-g14b62ab3e5-1ubuntu2.2","4.11.3+24-g14b62ab3e5-1ubuntu2.3"]},{"source":"osv","ecosystem":"Ubuntu:22.04:LTS","package":"xen","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["4.11.4+24-gddaaccbbab-1ubuntu2","4.16.0-1~ubuntu2","4.16.0-1~ubuntu2.1"]},{"source":"osv","ecosystem":"Ubuntu:24.04:LTS","package":"xen","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["4.17.2-1","4.17.2+55-g0b56bed864-1","4.17.2+76-ge1f9cb16e2-1","4.17.2+76-ge1f9cb16e2-1ubuntu1","4.17.3+10-g091466ba55-1","4.17.3+10-g091466ba55-1.1ubuntu2","4.17.3+10-g091466ba55-1.1ubuntu3"]},{"source":"osv","ecosystem":"Ubuntu:25.10","package":"xen","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["4.20.0-1ubuntu1","4.20.0+68-g35cb38b222-1"]},{"source":"osv","ecosystem":"Ubuntu:26.10","package":"xen","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["4.20.2+7-g1badcf5035-2build2","4.20.2+37-g61ff35323e-1ubuntu1","4.20.3+127-gc42374a105-1"]},{"source":"osv","ecosystem":"Ubuntu:26.04:LTS","package":"xen","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["4.20.0+68-g35cb38b222-1","4.20.2+7-g1badcf5035-2","4.20.2+7-g1badcf5035-2build2"]},{"source":"osv","ecosystem":"openSUSE:Leap 15.2","package":"xen","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.13.4_02-lp152.2.33.1"}]}],"bundled":7},{"source":"osv","ecosystem":"openSUSE:Leap 15.3","package":"xen","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.14.3_04-3.15.1"}]}],"bundled":7}],"products":[{"vendor":"debian","product":"debian_linux"},{"vendor":"fedoraproject","product":"fedora"},{"vendor":"xen","product":"xen"}],"references":[{"url":"https://xenbits.xenproject.org/xsa/advisory-385.txt","tags":["x_transferred","Mitigation","Patch","Third Party Advisory","fix"]},{"url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/I7ZGWVVRI4XY2XSTBI3XEMWBXPDVX6OT/","tags":["vendor-advisory","x_transferred","web"]},{"url":"https://www.debian.org/security/2021/dsa-5017","tags":["vendor-advisory","x_transferred","Third Party Advisory","advisory"]},{"url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/PXUI4VMD52CH3T7YXAG3J2JW7ZNN3SXF/","tags":["vendor-advisory","x_transferred","web"]},{"url":"https://security.gentoo.org/glsa/202402-07","tags":["vendor-advisory","x_transferred","advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2021-28706"},{"url":"https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/I7ZGWVVRI4XY2XSTBI3XEMWBXPDVX6OT/"},{"url":"https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/PXUI4VMD52CH3T7YXAG3J2JW7ZNN3SXF/"},{"url":"https://github.com/advisories/GHSA-x89c-76jf-xx4h"},{"url":"https://security.alpinelinux.org/vuln/CVE-2021-28706","tags":["advisory"]},{"url":"https://security-tracker.debian.org/tracker/CVE-2021-28706","tags":["advisory"]},{"url":"https://www.suse.com/support/update/announcement/2021/suse-su-202114848-1/","tags":["advisory"]},{"url":"https://bugzilla.suse.com/1182654","tags":["report"]},{"url":"https://bugzilla.suse.com/1186013","tags":["report"]},{"url":"https://bugzilla.suse.com/1186429","tags":["report"]},{"url":"https://bugzilla.suse.com/1186433","tags":["report"]},{"url":"https://bugzilla.suse.com/1186434","tags":["report"]},{"url":"https://bugzilla.suse.com/1187369","tags":["report"]},{"url":"https://bugzilla.suse.com/1187376","tags":["report"]},{"url":"https://bugzilla.suse.com/1187378","tags":["report"]},{"url":"https://bugzilla.suse.com/1189150","tags":["report"]},{"url":"https://bugzilla.suse.com/1189376","tags":["report"]},{"url":"https://bugzilla.suse.com/1189378","tags":["report"]},{"url":"https://bugzilla.suse.com/1189632","tags":["report"]},{"url":"https://bugzilla.suse.com/1192526","tags":["report"]},{"url":"https://bugzilla.suse.com/1192554","tags":["report"]},{"url":"https://bugzilla.suse.com/1192555","tags":["report"]},{"url":"https://bugzilla.suse.com/1192559","tags":["report"]},{"url":"https://www.suse.com/security/cve/CVE-2021-0089","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2021-20255","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2021-28690","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2021-28692","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2021-28697","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2021-28698","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2021-28701","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2021-28703","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2021-28705","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2021-28706","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2021-28709","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2021-3527","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2021-3592","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2021-3594","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2021-3595","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2021-3682","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2021-3930","tags":["web"]},{"url":"https://www.suse.com/support/update/announcement/2021/suse-su-20213813-1/","tags":["advisory"]},{"url":"https://bugzilla.suse.com/1192557","tags":["report"]},{"url":"https://www.suse.com/security/cve/CVE-2021-28704","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2021-28707","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2021-28708","tags":["web"]},{"url":"https://www.suse.com/support/update/announcement/2021/suse-su-20213842-1/","tags":["advisory"]},{"url":"https://bugzilla.suse.com/1189373","tags":["report"]},{"url":"https://www.suse.com/support/update/announcement/2021/suse-su-20213849-1/","tags":["advisory"]},{"url":"https://www.suse.com/support/update/announcement/2021/suse-su-20213851-1/","tags":["advisory"]},{"url":"https://www.suse.com/support/update/announcement/2021/suse-su-20213852-1/","tags":["advisory"]},{"url":"https://bugzilla.suse.com/1027519","tags":["report"]},{"url":"https://bugzilla.suse.com/1191363","tags":["report"]},{"url":"https://bugzilla.suse.com/1191510","tags":["report"]},{"url":"https://www.suse.com/security/cve/CVE-2021-28702","tags":["web"]},{"url":"https://www.suse.com/support/update/announcement/2021/suse-su-20213888-1/","tags":["advisory"]},{"url":"https://www.suse.com/support/update/announcement/2021/suse-su-20213968-1/","tags":["advisory"]},{"url":"https://www.suse.com/support/update/announcement/2021/suse-su-20213977-1/","tags":["advisory"]},{"url":"https://ubuntu.com/security/CVE-2021-28706","tags":["report"]},{"url":"https://xenbits.xen.org/xsa/advisory-385.html","tags":["report"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2021-28706","tags":["report"]},{"url":"https://lists.opensuse.org/archives/list/security-announce@lists.opensuse.org/thread/HUTTCXZ3RCSXYS25JPMTEXNGYRSDKJ26/","tags":["advisory"]},{"url":"https://lists.opensuse.org/archives/list/security-announce@lists.opensuse.org/thread/ELAKLWY4EZXSLS4BS47VPF2URIP3BLNK/","tags":["advisory"]}],"sources":{"cve":[{"id":"CVE-2021-28706","description":"guests may exceed their designated memory limit When a guest is permitted to have close to 16TiB of memory, it may be able to issue hypercalls to increase its memory allocation beyond the administrator established limit. This is a result of a calculation done with 32-bit precision, which may overflow. It would then only be the overflowed (and hence small) number which gets compared against the established upper bound.","status":"published","published":"2021-11-24T00:00:00Z","modified":"2024-08-03T21:47:33.187Z","updated_at":"2026-11-02T14:33:08.811269Z"}],"euvd":[{"id":"EUVD-2021-15363","description":"guests may exceed their designated memory limit When a guest is permitted to have close to 16TiB of memory, it may be able to issue hypercalls to increase its memory allocation beyond the administrator established limit. This is a result of a calculation done with 32-bit precision, which may overflow. It would then only be the overflowed (and hence small) number which gets compared against the established upper bound.","status":"published","published":"2021-11-24T00:00:00Z","modified":"2024-08-03T21:47:33Z","updated_at":"2026-11-03T03:24:46.117926Z"}],"ghsa":[{"id":"GHSA-x89c-76jf-xx4h","title":"guests may exceed their designated memory limit When a guest is permitted to have close to 16TiB...","description":"guests may exceed their designated memory limit When a guest is permitted to have close to 16TiB of memory, it may be able to issue hypercalls to increase its memory allocation beyond the administrator established limit. This is a result of a calculation done with 32-bit precision, which may overflow. It would then only be the overflowed (and hence small) number which gets compared against the established upper bound.","status":"published","published":"2022-05-24T19:21:18Z","modified":"2024-02-13T05:07:56Z","cvss":[{"version":"3.1","score":8.6,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H","level":"high"}],"cwes":["CWE-770"],"updated_at":"2026-11-02T14:55:36.780787Z"}],"nvd":[{"id":"CVE-2021-28706","description":"guests may exceed their designated memory limit When a guest is permitted to have close to 16TiB of memory, it may be able to issue hypercalls to increase its memory allocation beyond the administrator established limit. This is a result of a calculation done with 32-bit precision, which may overflow. It would then only be the overflowed (and hence small) number which gets compared against the established upper bound.","status":"published","published":"2021-11-24T01:15:08.127Z","modified":"2026-06-17T03:46:50.523Z","cvss":[{"version":"3.1","score":8.6,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H","level":"high","assessor":"primary"},{"version":"2.0","score":7.8,"vector":"AV:N/AC:L/Au:N/C:N/I:N/A:C","level":"high","assessor":"primary"}],"cwes":["CWE-770"],"updated_at":"2026-11-02T14:07:01.428028Z"}],"osv":[{"id":"ALPINE-CVE-2021-28706","description":"guests may exceed their designated memory limit When a guest is permitted to have close to 16TiB of memory, it may be able to issue hypercalls to increase its memory allocation beyond the administrator established limit. This is a result of a calculation done with 32-bit precision, which may overflow. It would then only be the overflowed (and hence small) number which gets compared against the established upper bound.","status":"published","published":"2021-11-24T01:15:08.127Z","modified":"2026-10-23T17:17:56.177767386Z","cvss":[{"version":"3.1","score":8.6,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H","level":"high"}],"updated_at":"2026-11-02T15:27:48.646074Z"},{"id":"CVE-2021-28706","description":"guests may exceed their designated memory limit When a guest is permitted to have close to 16TiB of memory, it may be able to issue hypercalls to increase its memory allocation beyond the administrator established limit. This is a result of a calculation done with 32-bit precision, which may overflow. It would then only be the overflowed (and hence small) number which gets compared against the established upper bound.","status":"published","published":"2021-11-24T01:15:08.127Z","modified":"2026-03-14T08:23:53.025454Z","cvss":[{"version":"3.1","score":8.6,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H","level":"high"}],"updated_at":"2026-11-02T15:44:19.129331Z"},{"id":"DEBIAN-CVE-2021-28706","description":"guests may exceed their designated memory limit When a guest is permitted to have close to 16TiB of memory, it may be able to issue hypercalls to increase its memory allocation beyond the administrator established limit. This is a result of a calculation done with 32-bit precision, which may overflow. It would then only be the overflowed (and hence small) number which gets compared against the established upper bound.","status":"published","published":"2021-11-24T01:15:08.127Z","modified":"2026-10-23T18:03:12.265499888Z","cvss":[{"version":"3.1","score":8.6,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H","level":"high"}],"updated_at":"2026-11-02T15:45:34.94143Z"},{"id":"UBUNTU-CVE-2021-28706","description":"guests may exceed their designated memory limit When a guest is permitted to have close to 16TiB of memory, it may be able to issue hypercalls to increase its memory allocation beyond the administrator established limit. This is a result of a calculation done with 32-bit precision, which may overflow. It would then only be the overflowed (and hence small) number which gets compared against the established upper bound.","status":"published","published":"2021-11-24T01:15:00Z","modified":"2026-10-17T12:57:12.854325068Z","cvss":[{"version":"3.1","score":8.6,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H","level":"high"}],"updated_at":"2026-11-02T15:54:26.779273Z"},{"id":"DSA-5017-1","title":"xen - security update","status":"published","published":"2021-12-05T00:00:00Z","modified":"2026-03-09T02:08:50.626456Z","updated_at":"2026-11-02T15:46:17.543497Z"},{"id":"openSUSE-SU-2021:1543-1","title":"Security update for xen","description":"This update for xen fixes the following issues:\n\n- CVE-2021-28702: Fixed PCI devices with RMRRs not deassigned correctly (XSA-386) (bsc#1191363).\n- CVE-2021-28704, CVE-2021-28707, CVE-2021-28708: Fixed PoD operations on misaligned GFNs (XSA-388) (bsc#1192557).\n- CVE-2021-28705, CVE-2021-28709: Fixed issues with partially successful P2M updates on x86 (XSA-389) (bsc#1192559).\n- CVE-2021-28706: Fixed guests may exceed their designated memory limit (XSA-385) (bsc#1192554).\n\n- Update to Xen 4.13.4 bug fix release (bsc#1027519).\n\nThis update was imported from the SUSE:SLE-15-SP2:Update update project.","status":"published","published":"2021-12-06T13:07:00Z","modified":"2026-02-04T03:22:19.174315Z","updated_at":"2026-11-02T16:58:32.266854Z"},{"id":"openSUSE-SU-2021:3968-1","title":"Security update for xen","description":"This update for xen fixes the following issues:\n\n- CVE-2021-28702: Fixed PCI devices with RMRRs not deassigned correctly (XSA-386) (bsc#1191363).\n- CVE-2021-28704, CVE-2021-28707, CVE-2021-28708: Fixed PoD operations on misaligned GFNs (XSA-388) (bsc#1192557).\n- CVE-2021-28705, CVE-2021-28709: Fixed issues with partially successful P2M updates on x86 (XSA-389) (bsc#1192559).\n- CVE-2021-28706: Fixed guests may exceed their designated memory limit (XSA-385) (bsc#1192554).\n\n- Update to Xen 4.14.3 bug fix release (bsc#1027519).\n","status":"published","published":"2021-12-07T14:31:08Z","modified":"2026-02-04T03:47:29.856094Z","updated_at":"2026-11-02T16:58:32.266854Z"},{"id":"SUSE-SU-2021:14848-1","title":"Security update for xen","description":"This update for xen fixes the following issues:\n\n- CVE-2021-0089: Fixed Speculative Code Store Bypass (XSA-375) (bsc#1186433).\n- CVE-2021-20255: Fixed stack overflow via infinite recursion in eepro100 (bsc#1182654).\n- CVE-2021-28690: Fixed x86 TSX Async Abort protections not restored after S3 (XSA-377) (bsc#1186434).\n- CVE-2021-28692: Fixed inappropriate x86 IOMMU timeout detection / handling (XSA-373) (bsc#1186429).\n- CVE-2021-28697: Fixed grant table v2 status pages may remain accessible after de-allocation (XSA-379) (bsc#1189376).\n- CVE-2021-28698: Fixed long running loops in grant table handling. (XSA-380) (bsc#1189378).\n- CVE-2021-28701: Fixed race condition in XENMAPSPACE_grant_table handling (XSA-384) (bsc#1189632).\n- CVE-2021-28703: Fixed grant table v2 status pages may remain accessible after de-allocation (take two) (XSA-387) (bsc#1192555).\n- CVE-2021-28705, CVE-2021-28709: Fixed issues with partially successful P2M updates on x86 (XSA-389) (bsc#1192559).\n- CVE-2021-28706: Fixed guests may exceed their designated memory limit (XSA-385) (bsc#1192554).\n- CVE-2021-3527: Fixed unbounded stack allocation in usbredir (bsc#1186013).\n- CVE-2021-3592: Fixed invalid pointer initialization may lead to information disclosure in slirp (bootp) (bsc#1187369).\n- CVE-2021-3594: Fixed invalid pointer initialization may lead to information disclosure in slirp (udp) (bsc#1187378).\n- CVE-2021-3595: Fixed invalid pointer initialization may lead to information disclosure in slirp (tftp) (bsc#1187376).\n- CVE-2021-3682: Fixed free call on invalid pointer in usbredir bufp_alloc (bsc#1189150).\n- CVE-2021-3930: Fixed off-by-one error in mode_sense_page() in hw/scsi/scsi-disk.c (bsc#1192526).\n","status":"published","published":"2021-12-01T15:57:08Z","modified":"2025-05-02T04:30:58.855247Z","updated_at":"2026-11-02T15:53:49.138643Z"},{"id":"SUSE-SU-2021:3813-1","title":"Security update for xen","description":"This update for xen fixes the following issues:\n\n- CVE-2021-28704, CVE-2021-28707, CVE-2021-28708: Fixed PoD operations on misaligned GFNs (XSA-388) (bsc#1192557).\n- CVE-2021-28705, CVE-2021-28709: Fixed issues with partially successful P2M updates on x86 (XSA-389) (bsc#1192559).\n- CVE-2021-28706: Fixed guests may exceed their designated memory limit (XSA-385) (bsc#1192554).\n","status":"published","published":"2021-11-29T11:15:02Z","modified":"2026-02-04T04:22:07.317545Z","updated_at":"2026-11-02T15:53:49.605187Z"},{"id":"SUSE-SU-2021:3842-1","title":"Security update for xen","description":"This update for xen fixes the following issues:\n\n- CVE-2021-28701: Fixed race condition in XENMAPSPACE_grant_table handling (XSA-384) (bsc#1189632).\n- CVE-2021-28704, CVE-2021-28707, CVE-2021-28708: Fixed PoD operations on misaligned GFNs (XSA-388) (bsc#1192557).\n- CVE-2021-28705, CVE-2021-28709: Fixed issues with partially successful P2M updates on x86 (XSA-389) (bsc#1192559).\n- CVE-2021-28706: Fixed guests may exceed their designated memory limit (XSA-385) (bsc#1192554).\n\n- Integrate bugfixes (bsc#1189373, bsc#1189378).\n","status":"published","published":"2021-12-01T15:17:58Z","modified":"2026-02-04T02:54:27.909907Z","updated_at":"2026-11-02T15:53:49.605187Z"},{"id":"SUSE-SU-2021:3849-1","title":"Security update for xen","description":"This update for xen fixes the following issues:\n\n- CVE-2021-28701: Fixed race condition in XENMAPSPACE_grant_table handling (XSA-384) (bsc#1189632).\n- CVE-2021-28704, CVE-2021-28707, CVE-2021-28708: Fixed PoD operations on misaligned GFNs (XSA-388) (bsc#1192557).\n- CVE-2021-28705, CVE-2021-28709: Fixed issues with partially successful P2M updates on x86 (XSA-389) (bsc#1192559).\n- CVE-2021-28706: Fixed guests may exceed their designated memory limit (XSA-385) (bsc#1192554).\n- Integrate bugfixes (bsc#1189373, bsc#1189378)\n","status":"published","published":"2021-12-01T15:56:49Z","modified":"2026-02-04T02:24:30.056943Z","updated_at":"2026-11-02T15:53:49.605187Z"},{"id":"SUSE-SU-2021:3851-1","title":"Security update for xen","description":"This update for xen fixes the following issues:\n\n- CVE-2021-28704, CVE-2021-28707, CVE-2021-28708: Fixed PoD operations on misaligned GFNs (XSA-388) (bsc#1192557).\n- CVE-2021-28705, CVE-2021-28709: Fixed issues with partially successful P2M updates on x86 (XSA-389) (bsc#1192559).\n- CVE-2021-28706: Fixed guests may exceed their designated memory limit (XSA-385) (bsc#1192554).\n","status":"published","published":"2021-12-01T15:57:36Z","modified":"2026-02-04T04:24:09.514369Z","updated_at":"2026-11-02T15:53:49.605187Z"},{"id":"SUSE-SU-2021:3852-1","title":"Security update for xen","description":"This update for xen fixes the following issues:\n\n- CVE-2021-28702: Fixed PCI devices with RMRRs not deassigned correctly (XSA-386) (bsc#1191363).\n- CVE-2021-28704, CVE-2021-28707, CVE-2021-28708: Fixed PoD operations on misaligned GFNs (XSA-388) (bsc#1192557).\n- CVE-2021-28705, CVE-2021-28709: Fixed issues with partially successful P2M updates on x86 (XSA-389) (bsc#1192559).\n- CVE-2021-28706: Fixed guests may exceed their designated memory limit (XSA-385) (bsc#1192554).\n\n- Fixed 15sp4 uefi fv guest on 12sp5 host unable to bootup with sriov pci device plugin (bsc#1191510).\n- Upstream bug fixes (bsc#1027519).\n","status":"published","published":"2021-12-01T15:57:55Z","modified":"2026-02-04T03:03:03.333179Z","updated_at":"2026-11-02T15:53:49.605187Z"},{"id":"SUSE-SU-2021:3888-1","title":"Security update for xen","description":"This update for xen fixes the following issues:\n\n- CVE-2021-28702: Fixed PCI devices with RMRRs not deassigned correctly (XSA-386) (bsc#1191363).\n- CVE-2021-28704, CVE-2021-28707, CVE-2021-28708: Fixed PoD operations on misaligned GFNs (XSA-388) (bsc#1192557).\n- CVE-2021-28705, CVE-2021-28709: Fixed issues with partially successful P2M updates on x86 (XSA-389) (bsc#1192559).\n- CVE-2021-28706: Fixed guests may exceed their designated memory limit (XSA-385) (bsc#1192554).\n\n- Update to Xen 4.13.4 bug fix release (bsc#1027519).\n","status":"published","published":"2021-12-03T08:47:48Z","modified":"2026-02-04T03:40:31.162395Z","updated_at":"2026-11-02T15:53:49.605187Z"},{"id":"SUSE-SU-2021:3968-1","title":"Security update for xen","description":"This update for xen fixes the following issues:\n\n- CVE-2021-28702: Fixed PCI devices with RMRRs not deassigned correctly (XSA-386) (bsc#1191363).\n- CVE-2021-28704, CVE-2021-28707, CVE-2021-28708: Fixed PoD operations on misaligned GFNs (XSA-388) (bsc#1192557).\n- CVE-2021-28705, CVE-2021-28709: Fixed issues with partially successful P2M updates on x86 (XSA-389) (bsc#1192559).\n- CVE-2021-28706: Fixed guests may exceed their designated memory limit (XSA-385) (bsc#1192554).\n\n- Update to Xen 4.14.3 bug fix release (bsc#1027519).\n","status":"published","published":"2021-12-07T14:31:13Z","modified":"2026-02-04T03:28:07.240515Z","updated_at":"2026-11-02T15:53:50.066806Z"},{"id":"SUSE-SU-2021:3977-1","title":"Security update for xen","description":"This update for xen fixes the following issues:\n\n- CVE-2021-28701: Fixed race condition in XENMAPSPACE_grant_table handling (XSA-384) (bsc#1189632).\n- CVE-2021-28702: Fixed PCI devices with RMRRs not deassigned correctly (XSA-386) (bsc#1191363).\n- CVE-2021-28704, CVE-2021-28707, CVE-2021-28708: Fixed PoD operations on misaligned GFNs (XSA-388) (bsc#1192557).\n- CVE-2021-28705, CVE-2021-28709: Fixed issues with partially successful P2M updates on x86 (XSA-389) (bsc#1192559).\n- CVE-2021-28706: Fixed guests may exceed their designated memory limit (XSA-385) (bsc#1192554).\n\n- Upstream bug fixes (bsc#1027519)\n","status":"published","published":"2021-12-09T10:05:29Z","modified":"2026-02-04T03:03:32.175208Z","updated_at":"2026-11-02T15:53:50.066806Z"}]}}