CVE-2025-21669

Severity CVSS v4.0:

Pending analysis

Type:

CWE-476 NULL Pointer Dereference

Publication date:

31/01/2025

Last modified:

04/02/2025

Description

In the Linux kernel, the following vulnerability has been resolved: vsock/virtio: discard packets if the transport changes If the socket has been de-assigned or assigned to another transport, we must discard any packets received because they are not expected and would cause issues when we access vsk->transport. A possible scenario is described by Hyunwoo Kim in the attached link, where after a first connect() interrupted by a signal, and a second connect() failed, we can find `vsk->transport` at NULL, leading to a NULL pointer dereference.

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::::::::	5.5 (including)	5.15.177 (excluding)
cpe:2.3:o:linux:linux_kernel::::::::	5.16 (including)	6.1.127 (excluding)
cpe:2.3:o:linux:linux_kernel::::::::	6.2 (including)	6.6.74 (excluding)
cpe:2.3:o:linux:linux_kernel::::::::	6.7 (including)	6.12.11 (excluding)
cpe:2.3:o:linux:linux_kernel:6.13:rc1::::::
cpe:2.3:o:linux:linux_kernel:6.13:rc2::::::
cpe:2.3:o:linux:linux_kernel:6.13:rc3::::::
cpe:2.3:o:linux:linux_kernel:6.13:rc4::::::
cpe:2.3:o:linux:linux_kernel:6.13:rc5::::::
cpe:2.3:o:linux:linux_kernel:6.13:rc6::::::
cpe:2.3:o:linux:linux_kernel:6.13:rc7::::::

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

CVE-2025-21669

Description

Impact

Vulnerable products and versions

References to Advisories, Solutions, and Tools