What’s Vulnerable › Vulnerabilities

CVE-2022-48904: iommu/amd: Fix I/O page table memory leak

• 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: 2024-08-22 · updated 2026-06-17
• Weakness: CWE-401

Description

In the Linux kernel, the following vulnerability has been resolved: iommu/amd: Fix I/O page table memory leak The current logic updates the I/O page table mode for the domain before calling the logic to free memory used for the page table. This results in IOMMU page table memory leak, and can be observed when launching VM w/ pass-through devices. Fix by freeing the memory used for page table before updating the mode.

Affected products

• Linux kernel: from 5.12 before 5.15.27; from 5.16 before 5.16.13; 5.17-rc1, 5.17-rc2, 5.17-rc3, 5.17-rc4, 5.17-rc5, 5.17-rc6 — fixed in 5.15.27, 5.16.13

How to fix

Upgrade to a fixed version: Linux kernel 5.15.27, 5.16.13. Check the vendor advisory for mitigations.

References

• https://git.kernel.org/stable/c/378e2fe1eb58d5c2ed55c8fe5e11f9db5033cdd6
• https://git.kernel.org/stable/c/6b0b2d9a6a308bcd9300c2d83000a82812c56cea
• https://git.kernel.org/stable/c/c78627f757e37c2cf386b59c700c4e1574988597

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