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CVE-2021-28706

Status Candidate

Overview

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.

Related Files

Gentoo Linux Security Advisory 202402-07
Posted Feb 5, 2024
Authored by Gentoo | Site security.gentoo.org

Gentoo Linux Security Advisory 202402-7 - Multiple vulnerabilities have been found in Xen, the worst of which can lead to arbitrary code execution. Versions greater than or equal to 4.16.6_pre1 are affected.

tags | advisory, arbitrary, vulnerability, code execution
systems | linux, gentoo
advisories | CVE-2021-28703, CVE-2021-28704, CVE-2021-28705, CVE-2021-28706, CVE-2021-28707, CVE-2021-28708, CVE-2021-28709, CVE-2022-23816, CVE-2022-23824, CVE-2022-23825, CVE-2022-26356, CVE-2022-26357, CVE-2022-26358, CVE-2022-26359
SHA-256 | 19872780145bfa0c32c4309b28ecde3c62c36daf70f877bcfa9b07a713bfd2ba
Debian Security Advisory 5017-1
Posted Dec 28, 2021
Authored by Debian | Site debian.org

Debian Linux Security Advisory 5017-1 - Multiple vulnerabilities have been discovered in the Xen hypervisor, which could result in privilege escalation, denial of service or information leaks.

tags | advisory, denial of service, vulnerability
systems | linux, debian
advisories | CVE-2021-28704, CVE-2021-28705, CVE-2021-28706, CVE-2021-28707, CVE-2021-28708, CVE-2021-28709
SHA-256 | b03ae44176b038f17b13a99fe5b85c4cbbb049073a1d6fd36112a4dd59c2a1f2
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