The vulnerability of the pci_epf_alloc_doorbell() function in the drivers/pci/endpoint/pci-ep-msi.c module of the Linux operating system’s PCI device driver allows a attacker to compromise the confidentiality, integrity, and accessibility of the protected information.

The vulnerability of the pciepfallocdoorbell function in the drivers/pci/endpoint/pci-ep-msi.c module of the Linux system’s PCI device driver lies in the fact that the same resource or descriptor is released multiple times. Exploiting this vulnerability could allow an attacker to compromise the...

CVE-2026-53067: Undefined Security Weakness

In the Linux kernel, the following vulnerability has been resolved: PCI: endpoint: pci-ep-msi: Fix error unwind and prevent double alloc pciepfallocdoorbell stores the allocated doorbell message array in epf-dbmsg/epf-numdb before requesting MSI vectors. If MSI allocation fails, the array is free...