CVE-2021-46918 dmaengine: idxd: clear MSIX permission entry on shutdown

2024-02-2706:53:56

Linux

www.cve.org

linux kernel

dmaengine

idxd

msix

permission entry

shutdown

cve-2021-46918

5.7 Medium

AI Score

Confidence

High

0.0004 Low

EPSS

Percentile

9.1%

JSON

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

dmaengine: idxd: clear MSIX permission entry on shutdown

Add disabling/clearing of MSIX permission entries on device shutdown to
mirror the enabling of the MSIX entries on probe. Current code left the
MSIX enabled and the pasid entries still programmed at device shutdown.

CNA Affected

[
  {
    "product": "Linux",
    "vendor": "Linux",
    "defaultStatus": "unaffected",
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "programFiles": [
      "drivers/dma/idxd/device.c",
      "drivers/dma/idxd/idxd.h",
      "drivers/dma/idxd/init.c"
    ],
    "versions": [
      {
        "version": "8e50d392652f",
        "lessThan": "c84b8982d7aa",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "8e50d392652f",
        "lessThan": "6df0e6c57dfc",
        "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/dma/idxd/device.c",
      "drivers/dma/idxd/idxd.h",
      "drivers/dma/idxd/init.c"
    ],
    "versions": [
      {
        "version": "5.11",
        "status": "affected"
      },
      {
        "version": "0",
        "lessThan": "5.11",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "5.11.16",
        "lessThanOrEqual": "5.11.*",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "5.12",
        "lessThanOrEqual": "*",
        "status": "unaffected",
        "versionType": "original_commit_for_fix"
      }
    ]
  }
]