PT-2024-32176 · Linux+8 · Linux Kernel+8
Timothy Pearson
·
Published
2024-07-04
·
Updated
2026-03-14
·
CVE-2024-46761
CVSS v3.1
5.5
Medium
| Vector | AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H |
Name of the Vulnerable Software and Affected Versions
Linux kernel versions prior to 6.10.9
Description
The issue is related to a null pointer dereference in the Linux kernel's hotplug driver for powerpc, specifically in the
pci/hotplug/pnv php.c file. This occurs when trying to hot-unplug or disable the PCIe switch/bridge from the PHB, causing a kernel crash. The crash happens because the MSI data structure is released during the disable/hot-unplug path and assigned a NULL value, but the code still attempts to disable the MSI during unregistration, resulting in a NULL pointer dereference. The estimated number of potentially affected devices is not specified. There is no information about real-world incidents where this issue was exploited.Recommendations
To resolve the issue, update the Linux kernel to version 6.10.9 or later. As a temporary workaround, consider disabling the hotplug driver for powerpc until a patch is available. Restrict access to the
pci/hotplug/pnv php module to minimize the risk of exploitation. Avoid using the pci disable msi/msix() function in the affected code path until the issue is resolved.Exploit
Fix
DoS
NULL Pointer Dereference
Found an issue in the description? Have something to add? Feel free to write us 👾
Weakness Enumeration
Related Identifiers
Affected Products
Alt Linux
Astra Linux
Debian
Linuxmint
Linux Kernel
Red Hat
Red Os
Suse
Ubuntu