// For flags

CVE-2022-26361

 

Severity Score

7.8
*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

0
*Multiple Sources

Exploited in Wild

-
*KEV

Decision

-
*SSVC
Descriptions

IOMMU: RMRR (VT-d) and unity map (AMD-Vi) handling issues T[his CNA information record relates to multiple CVEs; the text explains which aspects/vulnerabilities correspond to which CVE.] Certain PCI devices in a system might be assigned Reserved Memory Regions (specified via Reserved Memory Region Reporting, "RMRR") for Intel VT-d or Unity Mapping ranges for AMD-Vi. These are typically used for platform tasks such as legacy USB emulation. Since the precise purpose of these regions is unknown, once a device associated with such a region is active, the mappings of these regions need to remain continuouly accessible by the device. This requirement has been violated. Subsequent DMA or interrupts from the device may have unpredictable behaviour, ranging from IOMMU faults to memory corruption.

IOMMU: Problemas de manejo de RMRR (VT-d) y unity map (AMD-Vi) [Este registro de información CNA es relacionado con múltiples CVEs; el texto explica qué aspectos/vulnerabilidades corresponden a cada CVE]. Algunos dispositivos PCI de un sistema pueden tener asignadas Regiones de Memoria Reservada (especificadas por medio de Reserved Memory Region Reporting, "RMRR") para Intel VT-d o rangos de Unity Mapping para AMD-Vi. Normalmente son usados para tareas de plataforma como la emulación de USB heredada. Dado que se desconoce el propósito preciso de estas regiones, una vez que un dispositivo asociado a una región de este tipo está activo, los mapeos de estas regiones deben permanecer continuamente accesibles por el dispositivo. Este requisito ha sido violado. Las subsiguientes DMA o interrupciones del dispositivo pueden tener un comportamiento imprevisible, que va desde los fallos de la IOMMU hasta la corrupción de la memoria

*Credits: Aspects of this issue were discovered by Jan Beulich of SUSE and Roger Pau Monné of Citrix.
CVSS Scores
Attack Vector
Local
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High
Attack Vector
Local
Attack Complexity
Medium
Authentication
None
Confidentiality
Partial
Integrity
Partial
Availability
Partial
* Common Vulnerability Scoring System
SSVC
  • Decision:-
Exploitation
-
Automatable
-
Tech. Impact
-
* Organization's Worst-case Scenario
Timeline
  • 2022-03-02 CVE Reserved
  • 2022-04-05 CVE Published
  • 2023-10-27 EPSS Updated
  • 2024-08-03 CVE Updated
  • ---------- Exploited in Wild
  • ---------- KEV Due Date
  • ---------- First Exploit
CWE
CAPEC
Affected Vendors, Products, and Versions
Vendor Product Version Other Status
Vendor Product Version Other Status <-- --> Vendor Product Version Other Status
Xen
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 Xen
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-x86
Affected
Debian
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 Debian Linux
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 9.0
Search vendor "Debian" for product "Debian Linux" and version "9.0"
-
Affected
Fedoraproject
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 Fedora
Search vendor "Fedoraproject" for product "Fedora"
 34
Search vendor "Fedoraproject" for product "Fedora" and version "34"
-
Affected
Fedoraproject
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 Fedora
Search vendor "Fedoraproject" for product "Fedora"
 35
Search vendor "Fedoraproject" for product "Fedora" and version "35"
-
Affected