CVE-2022-49002

iommu/vt-d: Fix PCI device refcount leak in dmar_dev_scope_init()

State: Published
Severity: Not scored
Published: Oct 21, 2024
Updated: May 11, 2026
Reserved: Aug 22, 2024

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.

Scores

The record has no CVSS score.

Weaknesses

The record names no weakness.

Affected Products

Product	Versions
LinuxLinux	2e45528930388658603ea24d49cf52867b928d3e to before d47bc9d7bcdbb9adc9703513d964b514fee5b0bfAffected 2e45528930388658603ea24d49cf52867b928d3e to before 71c4a621985fc051ab86d3a86c749069a993fcb2Affected 2e45528930388658603ea24d49cf52867b928d3e to before 876d7bfb89273997056220029ff12b1c2cc4691dAffected 2e45528930388658603ea24d49cf52867b928d3e to before cbdd83bd2fd67142b03ce9dbdd1eab322ff7321fAffected 2e45528930388658603ea24d49cf52867b928d3e to before a5c65cd56aed027f8a97fda8b691caaeb66d115eAffected 2e45528930388658603ea24d49cf52867b928d3e to before bdb613ef179ad4bb9d56a2533e9b30e434f1dfb7Affected 2e45528930388658603ea24d49cf52867b928d3e to before 2a8f7b90681472948de172dbbf5a54cd342870aaAffected 2e45528930388658603ea24d49cf52867b928d3e to before 4bedbbd782ebbe7287231fea862c158d4f08a9e3Affected
LinuxLinux	3.15Affected before 3.15Not affected 4.9.335 through 4.9.Not affected 4.14.301 through 4.14.Not affected 4.19.268 through 4.19.Not affected 5.4.226 through 5.4.Not affected 5.10.158 through 5.10.Not affected 5.15.82 through 5.15.Not affected 6.0.12 through 6.0.*Not affected 6.1 and laterNot affected

Product

Versions

LinuxLinux

2e45528930388658603ea24d49cf52867b928d3e to before d47bc9d7bcdbb9adc9703513d964b514fee5b0bfAffected
2e45528930388658603ea24d49cf52867b928d3e to before 71c4a621985fc051ab86d3a86c749069a993fcb2Affected
2e45528930388658603ea24d49cf52867b928d3e to before 876d7bfb89273997056220029ff12b1c2cc4691dAffected
2e45528930388658603ea24d49cf52867b928d3e to before cbdd83bd2fd67142b03ce9dbdd1eab322ff7321fAffected
2e45528930388658603ea24d49cf52867b928d3e to before a5c65cd56aed027f8a97fda8b691caaeb66d115eAffected
2e45528930388658603ea24d49cf52867b928d3e to before bdb613ef179ad4bb9d56a2533e9b30e434f1dfb7Affected
2e45528930388658603ea24d49cf52867b928d3e to before 2a8f7b90681472948de172dbbf5a54cd342870aaAffected
2e45528930388658603ea24d49cf52867b928d3e to before 4bedbbd782ebbe7287231fea862c158d4f08a9e3Affected

LinuxLinux

3.15Affected
before 3.15Not affected
4.9.335 through 4.9.*Not affected
4.14.301 through 4.14.*Not affected
4.19.268 through 4.19.*Not affected
5.4.226 through 5.4.*Not affected
5.10.158 through 5.10.*Not affected
5.15.82 through 5.15.*Not affected
6.0.12 through 6.0.*Not affected
6.1 and laterNot affected

References

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