CVE-2021-28706
HIGH8.6EPSS 0.15%Published: 11/24/2021Modified: 11/19/2025
Also known as: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.
Affected packages (2)
- Alpine/xenfrom 0, < 4.13.4-r2
- Debian/xenfrom 0, < 4.14.3+32-g9de3671772-1~deb11u1
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | HIGH8.6 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H |