VDB
CVE-2021-28700
CVE-2021-28700
PUBLISHED
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.
EPSS 2.13% · 84.5th percentile
Risk Scores
EPSS Score
2.13%
84.5th percentile
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Ubuntu:25.10 | xen | 4.20.0-1ubuntu1, 0, 4.20.0+68-g35cb38b222-1 |
| Ubuntu:24.04:LTS | xen | 4.17.3+10-g091466ba55-1.1ubuntu2, 4.17.3+10-g091466ba55-1, 4.17.2+76-ge1f9cb16e2-1ubuntu1 |
| Ubuntu:20.04:LTS | xen | *, 0, 4.9.2-0ubuntu2 |
| Ubuntu:22.04:LTS | xen | 4.11.4+24-gddaaccbbab-1ubuntu2, 4.16.0-1~ubuntu2.1, 0 |
| Ubuntu:18.04:LTS | xen | 4.9.0-0ubuntu4, 4.9.2-0ubuntu1, 4.9.0-0ubuntu3 |
| Ubuntu:16.04:LTS | xen | 4.6.5-0ubuntu1.4, 4.6.5-0ubuntu1.2, 4.6.5-0ubuntu1.1 |
Exploit Intelligence
- CIRCL seen: CVE-2021-28700 (circl-sighting)
- https://xenbits.xenproject.org/xsa/advisory-383.txt (circl)
- FEDORA-2021-4f129cc0c1 (circl)
- FEDORA-2021-d68ed12e46 (circl)
- DSA-4977 (circl)
- FEDORA-2021-081f9bf5d2 (circl)
- GLSA-202208-23 (circl)
Timeline
- Aug 26, 2021 CVE Published
- Aug 27, 2021 PoC Published
- Aug 28, 2021 EPSS Score
- Sep 8, 2021 EPSS Score
- Sep 25, 2021 EPSS Score
- Oct 10, 2021 EPSS Score
- Oct 25, 2021 EPSS Score
- Jan 6, 2022 EPSS Score
- Feb 4, 2022 EPSS Score
- Feb 18, 2022 EPSS Score
- Apr 17, 2022 EPSS Score
- Jun 15, 2022 EPSS Score
References
- https://ubuntu.com/security/CVE-2021-28700 third-party-advisory
- https://xenbits.xen.org/xsa/advisory-383.html third-party-advisory
- https://www.cve.org/CVERecord?id=CVE-2021-28700 third-party-advisory