CVE-2024-46761

pci/hotplug/pnv_php: Fix hotplug driver crash on Powernv

EPSS 0.3%

Vexday Risk Score

3Low

SSVC decision (CISA)

Track

No exploitation signal → monitor

CVSS —EPSS 0.3%KEV nãoPoC —Nuclei —Metasploit —Patch —

Lifecycle

18 Sep 2024Published on NVD

Recommendation: Monitor — no exploitation signal at the moment.

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.

Affected products

Linux · Linux

References

https://git.kernel.org/stable/c/335e35b748527f0c06ded9eebb65387f60647fda https://git.kernel.org/stable/c/438d522227374042b5c8798f8ce83bbe479dca4d https://git.kernel.org/stable/c/4eb4085c1346d19d4a05c55246eb93e74e671048 https://git.kernel.org/stable/c/b82d4d5c736f4fd2ed224c35f554f50d1953d21e https://git.kernel.org/stable/c/bc1faed19db95abf0933b104910a3fb01b138f59 https://git.kernel.org/stable/c/bfc44075b19740d372f989f21dd03168bfda0689 https://git.kernel.org/stable/c/c0d8094dc740cfacf3775bbc6a1c4720459e8de4 https://git.kernel.org/stable/c/c4c681999d385e28f84808bbf3a85ea8e982da55 https://lists.debian.org/debian-lts-announce/2025/01/msg00001.html