Vulnerability Description
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.
CVSS Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Linux | Linux Kernel | >= 3.15, < 4.9.335 |
References
- https://git.kernel.org/stable/c/2a8f7b90681472948de172dbbf5a54cd342870aaPatch
- https://git.kernel.org/stable/c/4bedbbd782ebbe7287231fea862c158d4f08a9e3Patch
- https://git.kernel.org/stable/c/71c4a621985fc051ab86d3a86c749069a993fcb2Patch
- https://git.kernel.org/stable/c/876d7bfb89273997056220029ff12b1c2cc4691dPatch
- https://git.kernel.org/stable/c/a5c65cd56aed027f8a97fda8b691caaeb66d115ePatch
- https://git.kernel.org/stable/c/bdb613ef179ad4bb9d56a2533e9b30e434f1dfb7Patch
- https://git.kernel.org/stable/c/cbdd83bd2fd67142b03ce9dbdd1eab322ff7321fPatch
- https://git.kernel.org/stable/c/d47bc9d7bcdbb9adc9703513d964b514fee5b0bfPatch
FAQ
What is CVE-2022-49002?
CVE-2022-49002 is a vulnerability with a CVSS score of 5.5 (MEDIUM). 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 comme...
How severe is CVE-2022-49002?
CVE-2022-49002 has been rated MEDIUM with a CVSS base score of 5.5/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2022-49002?
Check the references section above for vendor advisories and patch information. Affected products include: Linux Linux Kernel.