CVE-2022-48724: iommu/vt-d: Fix potential memory leak in intel_setup_irq_remapping()

Severity: medium (CVSS 5.5 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.2% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2024-06-20 · updated 2026-06-17
Weakness: CWE-401

Description

In the Linux kernel, the following vulnerability has been resolved: iommu/vt-d: Fix potential memory leak in intel_setup_irq_remapping() After commit e3beca48a45b ("irqdomain/treewide: Keep firmware node unconditionally allocated"). For tear down scenario, fn is only freed after fail to allocate ir_domain, though it also should be freed in case dmar_enable_qi returns error. Besides free fn, irq_domain and ir_msi_domain need to be removed as well if intel_setup_irq_remapping fails to enable queued invalidation. Improve the rewinding path by add out_free_ir_domain and out_free_fwnode lables per Baolu's suggestion.

Affected products

Linux kernel: from 4.14.190 before 4.14.265; from 4.19.135 before 4.19.228; from 5.4.54 before 5.4.178; from 5.7.11 before 5.8; from 5.8 before 5.10.99; from 5.11 before 5.15.22 — fixed in 4.14.265, 4.19.228, 5.10.99, 5.15.22, 5.16.8, 5.4.178

How to fix

Upgrade to a fixed version: Linux kernel 4.14.265, 4.19.228, 5.10.99, 5.15.22. Check the vendor advisory for mitigations.

References

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