Bug 2313109 (CVE-2024-46761) - CVE-2024-46761 kernel: pci/hotplug/pnv_php: Fix hotplug driver crash on Powernv
Summary: CVE-2024-46761 kernel: pci/hotplug/pnv_php: Fix hotplug driver crash on Powernv
Keywords:
Status: NEW
Alias: CVE-2024-46761
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
medium
medium
Target Milestone: ---
Assignee: Product Security DevOps Team
QA Contact:
URL:
Whiteboard:
Depends On: 2313246
Blocks:
TreeView+ depends on / blocked
 
Reported: 2024-09-18 08:22 UTC by OSIDB Bzimport
Modified: 2025-05-13 08:28 UTC (History)
4 users (show)

Fixed In Version:
Clone Of:
Environment:
Last Closed:
Embargoed:

Attachments (Terms of Use)


Links
System ID Private Priority Status Summary Last Updated
Red Hat Product Errata RHSA-2025:6966 0 None None None 2025-05-13 08:28:31 UTC

Description OSIDB Bzimport 2024-09-18 08:22:01 UTC 
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.
Comment 1 Michal Findra 2024-09-18 11:32:22 UTC 
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2024091842-CVE-2024-46761-289f@gregkh/T
Comment 2 errata-xmlrpc 2025-05-13 08:28:30 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9

Via RHSA-2025:6966 https://access.redhat.com/errata/RHSA-2025:6966
Note You need to log in before you can comment on or make changes to this bug.