// For flags

CVE-2021-46967

vhost-vdpa: fix vm_flags for virtqueue doorbell mapping

Severity Score

"-"
*CVSS v-

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

0
*Multiple Sources

Exploited in Wild

-
*KEV

Decision

Track
*SSVC
Descriptions

In the Linux kernel, the following vulnerability has been resolved:

vhost-vdpa: fix vm_flags for virtqueue doorbell mapping

The virtqueue doorbell is usually implemented via registeres but we
don't provide the necessary vma->flags like VM_PFNMAP. This may cause
several issues e.g when userspace tries to map the doorbell via vhost
IOTLB, kernel may panic due to the page is not backed by page
structure. This patch fixes this by setting the necessary
vm_flags. With this patch, try to map doorbell via IOTLB will fail
with bad address.

En el kernel de Linux, se resolvió la siguiente vulnerabilidad: vhost-vdpa: corrige vm_flags para el mapeo del timbre virtqueue El timbre virtqueue generalmente se implementa a través de registros, pero no proporcionamos los vma->flags necesarios como VM_PFNMAP. Esto puede causar varios problemas, por ejemplo, cuando el espacio de usuario intenta asignar el timbre a través de vhost IOTLB, el kernel puede entrar en pánico debido a que la página no está respaldada por la estructura de la página. Este parche soluciona este problema configurando los vm_flags necesarios. Con este parche, intentar asignar el timbre a través de IOTLB fallará con una dirección incorrecta.

*Credits: N/A
CVSS Scores
Attack Vector
-
Attack Complexity
-
Privileges Required
-
User Interaction
-
Scope
-
Confidentiality
-
Integrity
-
Availability
-
* Common Vulnerability Scoring System
SSVC
  • Decision:Track
Exploitation
None
Automatable
No
Tech. Impact
Partial
* Organization's Worst-case Scenario
Timeline
  • 2024-02-27 CVE Reserved
  • 2024-02-27 CVE Published
  • 2024-02-28 EPSS Updated
  • 2024-08-04 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
Linux
Search vendor "Linux"
 Linux Kernel
Search vendor "Linux" for product "Linux Kernel"
 >= 5.8 < 5.10.36
Search vendor "Linux" for product "Linux Kernel" and version " >= 5.8 < 5.10.36"
en
Affected
Linux
Search vendor "Linux"
 Linux Kernel
Search vendor "Linux" for product "Linux Kernel"
 >= 5.8 < 5.11.20
Search vendor "Linux" for product "Linux Kernel" and version " >= 5.8 < 5.11.20"
en
Affected
Linux
Search vendor "Linux"
 Linux Kernel
Search vendor "Linux" for product "Linux Kernel"
 >= 5.8 < 5.12.3
Search vendor "Linux" for product "Linux Kernel" and version " >= 5.8 < 5.12.3"
en
Affected
Linux
Search vendor "Linux"
 Linux Kernel
Search vendor "Linux" for product "Linux Kernel"
 >= 5.8 < 5.13
Search vendor "Linux" for product "Linux Kernel" and version " >= 5.8 < 5.13"
en
Affected