// For flags

CVE-2023-46813

kernel: SEV-ES local priv escalation

Severity Score

7.0
*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

1
*Multiple Sources

Exploited in Wild

-
*KEV

Decision

-
*SSVC
Descriptions

An issue was discovered in the Linux kernel before 6.5.9, exploitable by local users with userspace access to MMIO registers. Incorrect access checking in the #VC handler and instruction emulation of the SEV-ES emulation of MMIO accesses could lead to arbitrary write access to kernel memory (and thus privilege escalation). This depends on a race condition through which userspace can replace an instruction before the #VC handler reads it.

Se descubrió un problema en el kernel de Linux anterior a 6.5.9, explotable por usuarios locales con acceso al espacio de usuario de los registros MMIO. La verificación de acceso incorrecta en el controlador #VC y la emulación de instrucciones de la emulación SEV-ES de accesos MMIO podrían provocar un acceso de escritura arbitrario a la memoria del kernel (y, por lo tanto, una escalada de privilegios). Esto depende de una condición de ejecución mediante la cual el espacio de usuario puede reemplazar una instrucción antes de que el controlador #VC la lea.

A buffer overflow and null pointer dereference flaw was found in the Linux kernel's Secure Encrypted Virtualization (SEV) implementation for AMD functionality. This issue occurs when a user in SEV guest VM accesses MMIO registers, which could allow a local user to crash the system or escalate their privileges on the system.

*Credits: N/A
CVSS Scores
Attack Vector
Local
Attack Complexity
High
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High
* Common Vulnerability Scoring System
SSVC
  • Decision:-
Exploitation
-
Automatable
-
Tech. Impact
-
* Organization's Worst-case Scenario
Timeline
  • 2023-10-27 CVE Reserved
  • 2023-10-27 CVE Published
  • 2023-10-27 EPSS Updated
  • 2024-08-02 CVE Updated
  • 2024-08-08 First Exploit
  • ---------- Exploited in Wild
  • ---------- KEV Due Date
CWE
  • CWE-269: Improper Privilege Management
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"
 < 6.5.9
Search vendor "Linux" for product "Linux Kernel" and version " < 6.5.9"
-
Affected