CVE-2021-28039

Medium

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.

Package Linux Kernel
Published 2021-03-05
Last modified 2024-11-21
CVSS version 3.1
Patch available
Awaiting data

CVSS 3.1 score

6.5

out of 10
Medium
Attack Vector
Local
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Changed
Confidentiality
Low
Integrity
None
Availability
High
Vector string
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H

Weakness type

CWE-131

CVE-2021-28039 is classified as CWE-131

See CWE-131 on MITRE CWE for full details on this weakness type.

References

4 total

Frequently asked questions

  • What is CVE-2021-28039?

    CVE-2021-28039 is a Medium severity Linux kernel vulnerability with a CVSS score of 6.5 out of 10 . CVE-2021-28039 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

  • What is the CVSS score for CVE-2021-28039?

    CVE-2021-28039 has a CVSS score of 6.5 out of 10, rated Medium severity (CVSS 3.1). The vector string is CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H .

  • Is there a patch available for CVE-2021-28039?

    Monitor the NIST NVD and your Linux distribution's security advisories for CVE-2021-28039 patch availability.

  • Is CVE-2021-28039 actively exploited?

    No. CVE-2021-28039 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.

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