| Name | CVE-2021-28700 |
| Description | xen/arm: No memory limit for dom0less domUs The dom0less feature allows an administrator to create multiple unprivileged domains directly from Xen. Unfortunately, the memory limit from them is not set. This allow a domain to allocate memory beyond what an administrator originally configured. |
| Source | CVE (at NVD; CERT, ENISA, LWN, oss-sec, fulldisc, Debian ELTS, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more) |
| References | DSA-4977-1 |
Vulnerable and fixed packages
The table below lists information on source packages.
| Source Package | Release | Version | Status |
|---|
| xen (PTS) | bullseye | 4.14.6-1 | fixed |
| bullseye (security) | 4.14.5+94-ge49571868d-1 | fixed |
| bookworm | 4.17.5+23-ga4e5191dc0-1+deb12u1 | fixed |
| bookworm (security) | 4.17.5+23-ga4e5191dc0-1 | fixed |
| forky, sid, trixie | 4.20.0+68-g35cb38b222-1 | fixed |
The information below is based on the following data on fixed versions.
| Package | Type | Release | Fixed Version | Urgency | Origin | Debian Bugs |
|---|
| xen | source | stretch | (not affected) | | | |
| xen | source | buster | (not affected) | | | |
| xen | source | bullseye | 4.14.3-1~deb11u1 | | DSA-4977-1 | |
| xen | source | (unstable) | 4.14.3-1 | | | |
Notes
[buster] - xen <not-affected> (Only affects 4.12 and later)
[stretch] - xen <not-affected> (Only affects 4.12 and later)
https://xenbits.xen.org/xsa/advisory-383.html