Linux · Linux Kernel · CVE-2021-47283
**Name of the Vulnerable Software and Affected Versions**
Linux kernel (affected versions not specified)
**Description**
The SFC driver in the Linux kernel can be configured via modparam to work using MSI-X, MSI, or legacy IRQ interrupts. However, when using legacy IRQ interrupts, the interrupt was not properly released on module remove due to the flag `irqs hooked` not being set during initialization. This results in a resource leak, as seen in the example trace during module remove, where a non-empty directory 'irq/125' is removed, leaking at least '0000:3b:00.1'. The issue is related to the `unregister irq proc`, `free desc`, `irq free descs`, `mp unmap irq`, `acpi unregister gsi ioapic`, `acpi pci irq disable`, `pci disable device`, `efx pci remove`, `pci device remove`, ` device release driver`, `driver detach`, `bus remove driver`, `pci unregister driver`, and `efx exit module` functions.
**Recommendations**
At the moment, there is no information about a newer version that contains a fix for this vulnerability.