CVE-2024-40945 iommu: Return right value in iommu_sva_bind_device()

2024-07-1212:25:19

Linux

www.cve.org

linux kernel

vulnerability

iommu_sva_bind_device

idxd

uacce

null pointer dereference

config_iommu_sva

EPSS

Percentile

10.6%

JSON

In the Linux kernel, the following vulnerability has been resolved:

iommu: Return right value in iommu_sva_bind_device()

iommu_sva_bind_device() should return either a sva bond handle or an
ERR_PTR value in error cases. Existing drivers (idxd and uacce) only
check the return value with IS_ERR(). This could potentially lead to
a kernel NULL pointer dereference issue if the function returns NULL
instead of an error pointer.

In reality, this doesn’t cause any problems because iommu_sva_bind_device()
only returns NULL when the kernel is not configured with CONFIG_IOMMU_SVA.
In this case, iommu_dev_enable_feature(dev, IOMMU_DEV_FEAT_SVA) will
return an error, and the device drivers won’t call iommu_sva_bind_device()
at all.

CNA Affected

[
  {
    "product": "Linux",
    "vendor": "Linux",
    "defaultStatus": "unaffected",
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "programFiles": [
      "include/linux/iommu.h"
    ],
    "versions": [
      {
        "version": "26b25a2b98e4",
        "lessThan": "700f56475888",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "26b25a2b98e4",
        "lessThan": "cf34f8f66982",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "26b25a2b98e4",
        "lessThan": "2973b8e7d127",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "26b25a2b98e4",
        "lessThan": "7388ae6f26c0",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "26b25a2b98e4",
        "lessThan": "61a96da9649a",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "26b25a2b98e4",
        "lessThan": "89e8a2366e3b",
        "status": "affected",
        "versionType": "git"
      }
    ]
  },
  {
    "product": "Linux",
    "vendor": "Linux",
    "defaultStatus": "affected",
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "programFiles": [
      "include/linux/iommu.h"
    ],
    "versions": [
      {
        "version": "5.2",
        "status": "affected"
      },
      {
        "version": "0",
        "lessThan": "5.2",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "5.4.279",
        "lessThanOrEqual": "5.4.*",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "5.10.221",
        "lessThanOrEqual": "5.10.*",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "5.15.162",
        "lessThanOrEqual": "5.15.*",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "6.6.35",
        "lessThanOrEqual": "6.6.*",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "6.9.6",
        "lessThanOrEqual": "6.9.*",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "6.10",
        "lessThanOrEqual": "*",
        "status": "unaffected",
        "versionType": "original_commit_for_fix"
      }
    ]
  }
]