Home/CVE/An issue was discovered in the Linux kernel 5.9.x through 5.11.3, as used with Xen. In some less-common configurations,
CVE

CVE-2021-28039

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 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.

MEDIUM · CVSS 6.5 EPSS 0.0014
Monitor
  • No active-exploitation, high-EPSS, or public-exploit signals - routine patching cadence
Sigma rules0 YARA rules0
⬡

Weakness Classification

CWE-131Incorrect Calculation of Buffer Size
▤

Affected Products & Versions

4
linux kernel>= 5.9.0 and <= 5.11.3
xenall versions
netapp cloud backupall versions
netapp solidfire baseboard management controller firmwareall versions
▣

Scoring & Timeline

6.5
MEDIUM · CVSS v3.1 · cve@mitre.org
View on NVD
Attack Vector
Network Adjacent Local Physical
Attack Complexity
Low High
Privileges Required
None Low High
User Interaction
None Required
Scope
Unchanged Changed
Confidentiality
None Low High
Integrity
None Low High
Availability
None Low High
Published to NVD05 Mar 2021 · 06:15 PM
CVSS VectorCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H
🔗

References & Sources

4
Source URLs (vendor pages, mailing lists, write-ups). Exploit/PoC links are in their own section above to avoid duplication.
http://www.openwall.com/lists/oss-security/2021/03/05/2Mailing ListPatchThird Party Advisory
http://xenbits.xen.org/xsa/advisory-369.htmlPatchVendor Advisory
https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=882213990d32fd224340a4533f6318dd152be4b2
https://security.netapp.com/advisory/ntap-20210409-0001/Third Party Advisory
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