cve.bz

CVE-2021-28039

6.5 mediumEPSS 0.4%

Medium (6.5). EPSS 0.4% chance of exploitation in the next 30 days.

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.

Severity

CVSS 3.1

6.5 medium
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H
EPSS
0.4% chance of exploitation in the next 30 days; higher than 36% of CVEs (scores of 2026-10-31)
CWE
CWE-131
Published
Modified
Record from
the NVD, synced

Affected

References

Check your stackJSON