cve-2021-28706
Vulnerability from cvelistv5
Published
2021-11-24 00:00
Modified
2024-08-03 21:47
Severity ?
Summary
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.
References
security@xen.orghttps://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/I7ZGWVVRI4XY2XSTBI3XEMWBXPDVX6OT/
security@xen.orghttps://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/PXUI4VMD52CH3T7YXAG3J2JW7ZNN3SXF/
security@xen.orghttps://security.gentoo.org/glsa/202402-07
security@xen.orghttps://www.debian.org/security/2021/dsa-5017Third Party Advisory
security@xen.orghttps://xenbits.xenproject.org/xsa/advisory-385.txtMitigation, Patch, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/I7ZGWVVRI4XY2XSTBI3XEMWBXPDVX6OT/
af854a3a-2127-422b-91ae-364da2661108https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/PXUI4VMD52CH3T7YXAG3J2JW7ZNN3SXF/
af854a3a-2127-422b-91ae-364da2661108https://security.gentoo.org/glsa/202402-07
af854a3a-2127-422b-91ae-364da2661108https://www.debian.org/security/2021/dsa-5017Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://xenbits.xenproject.org/xsa/advisory-385.txtMitigation, Patch, Third Party Advisory
Impacted products
Vendor Product Version
Xen xen Version: 4.12.x
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   Xen xen Version: 4.14.x   < unspecified
Patch: next of 4.15.x
 Create a notification for this product.
   Xen xen Version: xen-unstable
 Create a notification for this product.
   Xen xen Version: 4.13.x
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      datePublished: "2021-11-24T00:00:00",
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         id: "CVE-2021-28706",
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   },
}


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