// For flags

CVE-2021-28039

 

Severity Score

6.5
*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

0
*Multiple Sources

Exploited in Wild

-
*KEV

Decision

-
*SSVC
Descriptions

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.

Se detectó un problema en el kernel de Linux versiones 5.9.x hasta 5.11.3, como es usada con Xen. En algunas configuraciones menos comunes, un usuario de Sistema Operativo invitado PV x86 puede bloquear un dominio de controlador o Dom0 por medio de una gran cantidad de actividad de I/O. El problema se relaciona con el uso indebido de las direcciones físicas de invitados cuando una configuración presenta CONFIG_XEN_UNPOPULATED_ALLOC pero no CONFIG_XEN_BALLOON_MEMORY_HOTPLUG

*Credits: N/A
CVSS Scores
Attack Vector
Local
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Changed
Confidentiality
None
Integrity
None
Availability
High
Attack Vector
Local
Attack Complexity
Low
Authentication
None
Confidentiality
None
Integrity
None
Availability
Partial
* Common Vulnerability Scoring System
SSVC
  • Decision:-
Exploitation
-
Automatable
-
Tech. Impact
-
* Organization's Worst-case Scenario
Timeline
  • 2021-03-05 CVE Reserved
  • 2021-03-05 CVE Published
  • 2024-03-25 EPSS Updated
  • 2024-08-03 CVE Updated
  • ---------- Exploited in Wild
  • ---------- KEV Due Date
  • ---------- First Exploit
CWE
  • CWE-131: Incorrect Calculation of Buffer Size
CAPEC
Affected Vendors, Products, and Versions
Vendor Product Version Other Status
Vendor Product Version Other Status <-- --> Vendor Product Version Other Status
Linux
Search vendor "Linux"
 Linux Kernel
Search vendor "Linux" for product "Linux Kernel"
 >= 5.9.0 <= 5.11.3
Search vendor "Linux" for product "Linux Kernel" and version " >= 5.9.0 <= 5.11.3"
x86
Affected
Xen
Search vendor "Xen"
 Xen
Search vendor "Xen" for product "Xen"
--
Affected
Netapp
Search vendor "Netapp"
 Cloud Backup
Search vendor "Netapp" for product "Cloud Backup"
--
Affected
Netapp
Search vendor "Netapp"
 Solidfire Baseboard Management Controller Firmware
Search vendor "Netapp" for product "Solidfire Baseboard Management Controller Firmware"
--
Affected