CVE-2021-46917 dmaengine: idxd: fix wq cleanup of WQCFG registers

2024-02-2706:53:55

Linux

www.cve.org

dmaengine

idxd

wq cleanup

linux kernel

vulnerability

silicon erratum

mmio region

AI Score

5.7

Confidence

High

EPSS

Percentile

15.5%

JSON

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

dmaengine: idxd: fix wq cleanup of WQCFG registers

A pre-release silicon erratum workaround where wq reset does not clear
WQCFG registers was leaked into upstream code. Use wq reset command
instead of blasting the MMIO region. This also address an issue where
we clobber registers in future devices.

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/sysfs.c"
    ],
    "versions": [
      {
        "version": "da32b28c95a7",
        "lessThan": "e5eb9757fe4c",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "da32b28c95a7",
        "lessThan": "f7dc8f561916",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "da32b28c95a7",
        "lessThan": "ea9aadc06a9f",
        "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/sysfs.c"
    ],
    "versions": [
      {
        "version": "5.8",
        "status": "affected"
      },
      {
        "version": "0",
        "lessThan": "5.8",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "5.10.32",
        "lessThanOrEqual": "5.10.*",
        "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"
      }
    ]
  }
]