CVE-2024-36909

Severity CVSS v4.0:

Pending analysis

Type:

Unavailable / Other

Publication date:

30/05/2024

Last modified:

30/09/2025

Description

In the Linux kernel, the following vulnerability has been resolved: Drivers: hv: vmbus: Don&#39;t free ring buffers that couldn&#39;t be re-encrypted 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. The VMBus ring buffer code could free decrypted/shared pages if set_memory_decrypted() fails. Check the decrypted field in the struct vmbus_gpadl for the ring buffers to decide whether to free the memory.

Impact

Vector 3.x

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H CVSS v3.1 Severity and Metrics:

Base Score: 5.50 MEDIUM
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Attack Vector (AV): Local
Attack Complexity (AC): Low
Privileges Required (PR): Low
User Interaction (UI): None
Scope (S): Unchanged
Confidentiality (C): None
Integrity (I): None
Availability (A): High

Base Score 3.x

5.50

Severity 3.x

MEDIUM

Vulnerable products and versions

CPE	From	Up to
cpe:2.3:o:linux:linux_kernel::::::::		6.1.91 (excluding)
cpe:2.3:o:linux:linux_kernel::::::::	6.2 (including)	6.6.31 (excluding)
cpe:2.3:o:linux:linux_kernel::::::::	6.7 (including)	6.8.10 (excluding)
cpe:2.3:o:linux:linux_kernel:6.9:rc1::::::
cpe:2.3:o:linux:linux_kernel:6.9:rc2::::::
cpe:2.3:o:linux:linux_kernel:6.9:rc3::::::

To consult the complete list of CPE names with products and versions, see this page

CVE-2024-36909

Description

Impact

Vulnerable products and versions

References to Advisories, Solutions, and Tools