Vulnerability Details : 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 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.
Products affected by CVE-2021-28039
- cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:x86:*
- cpe:2.3:o:xen:xen:-:*:*:*:*:*:*:*
- cpe:2.3:a:netapp:cloud_backup:-:*:*:*:*:*:*:*
- cpe:2.3:o:netapp:solidfire_baseboard_management_controller_firmware:-:*:*:*:*:*:*:*
Exploit prediction scoring system (EPSS) score for CVE-2021-28039
0.04%
Probability of exploitation activity in the next 30 days
EPSS Score History
~ 5 %
Percentile, the proportion of vulnerabilities that are scored at or less
CVSS scores for CVE-2021-28039
Base Score | Base Severity | CVSS Vector | Exploitability Score | Impact Score | Score Source | First Seen |
---|---|---|---|---|---|---|
2.1
|
LOW | AV:L/AC:L/Au:N/C:N/I:N/A:P |
3.9
|
2.9
|
NIST | |
6.5
|
MEDIUM | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H |
2.0
|
4.0
|
NIST |
CWE ids for CVE-2021-28039
-
The product does not correctly calculate the size to be used when allocating a buffer, which could lead to a buffer overflow.Assigned by: nvd@nist.gov (Primary)
References for CVE-2021-28039
-
http://www.openwall.com/lists/oss-security/2021/03/05/2
oss-security - Xen Security Advisory 369 v2 (CVE-2021-28039) - Linux: special config may crash when trying to map foreign pagesMailing List;Patch;Third Party Advisory
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https://security.netapp.com/advisory/ntap-20210409-0001/
March 2021 Linux Kernel 5.11.3 Vulnerabilities in NetApp Products | NetApp Product SecurityThird Party Advisory
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http://xenbits.xen.org/xsa/advisory-369.html
XSA-369 - Xen Security AdvisoriesPatch;Vendor Advisory
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https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=882213990d32fd224340a4533f6318dd152be4b2
xen: fix p2m size in dom0 for disabled memory hotplug case - kernel/git/torvalds/linux.git - Linux kernel source tree
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