Bug 2395300 (CVE-2023-53175)

Summary: CVE-2023-53175 kernel: PCI: hv: Fix a crash in hv_pci_restore_msi_msg() during hibernation
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security DevOps Team <prodsec-dev>
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Version: unspecifiedKeywords: Security
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OS: Linux   
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Description OSIDB Bzimport 2025-09-15 15:06:14 UTC 
In the Linux kernel, the following vulnerability has been resolved:

PCI: hv: Fix a crash in hv_pci_restore_msi_msg() during hibernation

When a Linux VM with an assigned PCI device runs on Hyper-V, if the PCI
device driver is not loaded yet (i.e. MSI-X/MSI is not enabled on the
device yet), doing a VM hibernation triggers a panic in
hv_pci_restore_msi_msg() -> msi_lock_descs(&pdev->dev), because
pdev->dev.msi.data is still NULL.

Avoid the panic by checking if MSI-X/MSI is enabled.
Comment 1 Keith Grant 2025-09-16 12:53:57 UTC 
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2025091555-CVE-2023-53175-66fa@gregkh/T