CVE-2024-46761

Severity CVSS v4.0:

Pending analysis

Type:

CWE-476 NULL Pointer Dereference

Publication date:

18/09/2024

Last modified:

23/09/2024

Description

In the Linux kernel, the following vulnerability has been resolved: pci/hotplug/pnv_php: Fix hotplug driver crash on Powernv The hotplug driver for powerpc (pci/hotplug/pnv_php.c) causes a kernel crash when we try to hot-unplug/disable the PCIe switch/bridge from the PHB. The crash occurs because although the MSI data structure has been released during disable/hot-unplug path and it has been assigned with NULL, still during unregistration the code was again trying to explicitly disable the MSI which causes the NULL pointer dereference and kernel crash. The patch fixes the check during unregistration path to prevent invoking pci_disable_msi/msix() since its data structure is already freed.

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::::::::		4.19.322 (excluding)
cpe:2.3:o:linux:linux_kernel::::::::	4.20 (including)	5.4.284 (excluding)
cpe:2.3:o:linux:linux_kernel::::::::	5.5 (including)	5.10.226 (excluding)
cpe:2.3:o:linux:linux_kernel::::::::	5.11 (including)	5.15.167 (excluding)
cpe:2.3:o:linux:linux_kernel::::::::	5.16 (including)	6.1.110 (excluding)
cpe:2.3:o:linux:linux_kernel::::::::	6.2 (including)	6.6.51 (excluding)
cpe:2.3:o:linux:linux_kernel::::::::	6.7 (including)	6.10.10 (excluding)

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

CVE-2024-46761

Description

Impact

Vulnerable products and versions

References to Advisories, Solutions, and Tools