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

2024-08-2201:30:28

Linux

www.cve.org

vulnerability

iommu

linux kernel

memory leak

cve-2022-48904

EPSS

Percentile

5.1%

JSON

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.

CNA Affected

[
  {
    "product": "Linux",
    "vendor": "Linux",
    "defaultStatus": "unaffected",
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "programFiles": [
      "drivers/iommu/amd/io_pgtable.c"
    ],
    "versions": [
      {
        "version": "e42ba0633064",
        "lessThan": "378e2fe1eb58",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "e42ba0633064",
        "lessThan": "c78627f757e3",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "e42ba0633064",
        "lessThan": "6b0b2d9a6a30",
        "status": "affected",
        "versionType": "git"
      }
    ]
  },
  {
    "product": "Linux",
    "vendor": "Linux",
    "defaultStatus": "affected",
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "programFiles": [
      "drivers/iommu/amd/io_pgtable.c"
    ],
    "versions": [
      {
        "version": "5.12",
        "status": "affected"
      },
      {
        "version": "0",
        "lessThan": "5.12",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "5.15.27",
        "lessThanOrEqual": "5.15.*",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "5.16.13",
        "lessThanOrEqual": "5.16.*",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "5.17",
        "lessThanOrEqual": "*",
        "status": "unaffected",
        "versionType": "original_commit_for_fix"
      }
    ]
  }
]