CVE-2024-36913

Drivers: hv: vmbus: Leak pages if set_memory_encrypted() fails

Severity Score

8.1

*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

Track*

*SSVC

Descriptions

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

Drivers: hv: vmbus: Leak pages if set_memory_encrypted() fails

In CoCo VMs it is possible for the untrusted host to cause
set_memory_encrypted() or set_memory_decrypted() to fail such that an
error is returned and the resulting memory is shared. Callers need to
take care to handle these errors to avoid returning decrypted (shared)
memory to the page allocator, which could lead to functional or security
issues.

VMBus code could free decrypted pages if set_memory_encrypted()/decrypted()
fails. Leak the pages if this happens.

En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: Controladores: hv: vmbus: páginas de fuga si falla set_memory_encrypted() En máquinas virtuales CoCo, es posible que el host que no es de confianza provoque que set_memory_encrypted() o set_memory_decrypted() falle de manera que se produzca un error se devuelve y la memoria resultante se comparte. Las personas que llaman deben tener cuidado al manejar estos errores para evitar devolver memoria descifrada (compartida) al asignador de páginas, lo que podría provocar problemas funcionales o de seguridad. El código VMBus podría liberar páginas descifradas si falla set_memory_encrypted()/decrypted(). Filtre las páginas si esto sucede.

*Credits: N/A

CVSS Scores

CISAv3.1 8.1

Attack Vector

Network

Attack Complexity

High

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

* Common Vulnerability Scoring System

SSVC

Decision:Track*

Exploitation

None

Automatable

Tech. Impact

Total

* Organization's Worst-case Scenario

Timeline

2024-05-30 CVE Reserved
2024-05-30 CVE Published
2024-05-31 EPSS Updated
2024-11-05 CVE Updated
---------- Exploited in Wild
---------- KEV Due Date
---------- First Exploit

CWE

CWE-1258: Exposure of Sensitive System Information Due to Uncleared Debug Information

CAPEC

References (3)

URL	Tag	Source

URL	Date	SRC

URL	Date	SRC
https://git.kernel.org/stable/c/6123a4e8e25bd40cf44db14694abac00e6b664e6	2024-05-17
https://git.kernel.org/stable/c/e813a0fc2e597146e9cebea61ced9c796d4e308f	2024-05-17
https://git.kernel.org/stable/c/03f5a999adba062456c8c818a683beb1b498983a	2024-04-10

URL	Date	SRC

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"				< 6.6.31 Search vendor "Linux" for product "Linux Kernel" and version " < 6.6.31"		en		Affected
Linux Search vendor "Linux"		Linux Kernel Search vendor "Linux" for product "Linux Kernel"				< 6.8.10 Search vendor "Linux" for product "Linux Kernel" and version " < 6.8.10"		en		Affected
Linux Search vendor "Linux"		Linux Kernel Search vendor "Linux" for product "Linux Kernel"				< 6.9 Search vendor "Linux" for product "Linux Kernel" and version " < 6.9"		en		Affected