CVE-2021-28039
low
CVSS v3
—
CVSS v2
—
VIR risk
2.5
Description
An issue was discovered in the Linux kernel 5.9.x through 5.11.3, as used with Xen. In some less-common configurations, an x86 PV guest OS user can crash a Dom0 or driver domain via a large amount of I/O activity. The issue relates to misuse of guest physical addresses when a configuration has CONFIG_XEN_UNPOPULATED_ALLOC but not CONFIG_XEN_BALLOON_MEMORY_HOTPLUG.
Predictions
Exploit likelihood
20%
Patch ETA
—
Heuristic predictions, AS-IS, for prioritization only.
Mitigations
Vendor advisory: debian — https://security-tracker.debian.org/tracker/CVE-2021-28039
Vendor advisory: suse — https://www.suse.com/security/cve/CVE-2021-28039.html
OS impact
| OS | Version | Status | Fixed in |
|---|---|---|---|
| arch | affected | | |
| sles | affected | | |
| debian | bookworm | fixed | 5.10.24-1 |
| debian | bullseye | fixed | 5.10.24-1 |
| debian | forky | fixed | 5.10.24-1 |
| debian | sid | fixed | 5.10.24-1 |
| debian | trixie | fixed | 5.10.24-1 |
References
Verify integrity in audit chain (admin only). AS-IS.