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.

Risk Information

Base Score

8.6

MODERATE

Vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H

EPSS Score

Exploitation Probability

0.155

Associated Vulnerability

Vulnerability	OS Platform
SUSE-SU-2021:3852-1(SUSE Linux Enterprise Server 12-SP5 ) xen-4.12.4_16-3.55.1.x86_64.rpm	Linux
SUSE-SU-2021:3852-1(SUSE Linux Enterprise Server 12-SP5 ) xen-debugsource-4.12.4_16-3.55.1.x86_64.rpm	Linux
SUSE-SU-2021:3852-1(SUSE Linux Enterprise Server 12-SP5 ) xen-doc-html-4.12.4_16-3.55.1.x86_64.rpm	Linux
SUSE-SU-2021:3852-1(SUSE Linux Enterprise Server 12-SP5 ) xen-libs-4.12.4_16-3.55.1.x86_64.rpm	Linux
SUSE-SU-2021:3852-1(SUSE Linux Enterprise Server 12-SP5 ) xen-libs-32bit-4.12.4_16-3.55.1.x86_64.rpm	Linux
SUSE-SU-2021:3852-1(SUSE Linux Enterprise Server 12-SP5 ) xen-libs-debuginfo-4.12.4_16-3.55.1.x86_64.rpm	Linux
SUSE-SU-2021:3852-1(SUSE Linux Enterprise Server 12-SP5 ) xen-libs-debuginfo-32bit-4.12.4_16-3.55.1.x86_64.rpm	Linux
SUSE-SU-2021:3852-1(SUSE Linux Enterprise Server 12-SP5 ) xen-tools-4.12.4_16-3.55.1.x86_64.rpm	Linux
SUSE-SU-2021:3852-1(SUSE Linux Enterprise Server 12-SP5 ) xen-tools-debuginfo-4.12.4_16-3.55.1.x86_64.rpm	Linux
SUSE-SU-2021:3852-1(SUSE Linux Enterprise Server 12-SP5 ) xen-tools-domU-4.12.4_16-3.55.1.x86_64.rpm	Linux
SUSE-SU-2021:3852-1(SUSE Linux Enterprise Server 12-SP5 ) xen-tools-domU-debuginfo-4.12.4_16-3.55.1.x86_64.rpm	Linux

Patch Details

No records found

References

https://nvd.nist.gov/vuln/detail/CVE-2023-1234
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2023-1234