CVE-2025-40117

In the Linux kernel, the following vulnerability has been resolved:<br /> <br /> misc: pci_endpoint_test: Fix array underflow in pci_endpoint_test_ioctl()<br /> <br /> Commit eefb83790a0d ("misc: pci_endpoint_test: Add doorbell test case")<br /> added NO_BAR (-1) to the pci_barno enum which, in practical terms,<br /> changes the enum from an unsigned int to a signed int. If the user<br /> passes a negative number in pci_endpoint_test_ioctl() then it results in<br /> an array underflow in pci_endpoint_test_bar().