CVE-2021-28706
N/A
N/A
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.
Affected Software
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| Xen | xen | 4.12.x | affected |
| Xen | xen | unspecified < 4.12 | unknown |
| Xen | xen | 4.14.x < unspecified | affected |
| Xen | xen | next of 4.15.x < unspecified | unaffected |
| Xen | xen | xen-unstable | affected |
| Xen | xen | 4.13.x | affected |
Weaknesses
- unknown
ADP Enrichment
CVE Program Container
Additional References
- https://xenbits.xenproject.org/xsa/advisory-385.txt
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/I7ZGWVVRI4XY2XSTBI3XEMWBXPDVX6OT/
- https://www.debian.org/security/2021/dsa-5017
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/PXUI4VMD52CH3T7YXAG3J2JW7ZNN3SXF/
- https://security.gentoo.org/glsa/202402-07
References
- https://xenbits.xenproject.org/xsa/advisory-385.txt
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/I7ZGWVVRI4XY2XSTBI3XEMWBXPDVX6OT/
- https://www.debian.org/security/2021/dsa-5017
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/PXUI4VMD52CH3T7YXAG3J2JW7ZNN3SXF/
- https://security.gentoo.org/glsa/202402-07
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