CVE-2022-49002: Linux Kernel

Medium severity, CVSS 5.5. EPSS: 0.2% chance of exploitation in the next 30 days.

In the Linux kernel, the following vulnerability has been resolved: iommu/vt-d: Fix PCI device refcount leak in dmar_dev_scope_init() for_each_pci_dev() is implemented by pci_get_device(). The comment of pci_get_device() says that it will increase the reference count for the returned pci_dev and also decrease the reference count for the input pci_dev @from if it is not NULL. If we break for_each_pci_dev() loop with pdev not NULL, we need to call pci_dev_put() to decrease the reference count. Add the missing pci_dev_put() for the error path to avoid reference count leak.

Affected products

• Linux Linux Kernel: from 3.15, before 4.9.335 (fixed in 4.9.335); from 4.10, before 4.14.301 (fixed in 4.14.301); from 4.15, before 4.19.268 (fixed in 4.19.268); from 4.20, before 5.4.226 (fixed in 5.4.226); from 5.5, before 5.10.158 (fixed in 5.10.158); from 5.11, before 5.15.82 (fixed in 5.15.82); …

Published 2024-10-21. Last modified 2026-06-17.