CVE-2021-46919 dmaengine: idxd: fix wq size store permission state

2024-02-2706:53:56

Linux

github.com

linux kernel

vulnerability

dmaengine

idxd

fix

wq size

device state

AI Score

6.8

Confidence

Low

SSVC

Exploitation

none

Automatable

Technical Impact

partial

JSON

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

dmaengine: idxd: fix wq size store permission state

WQ size can only be changed when the device is disabled. Current code
allows change when device is enabled but wq is disabled. Change the check
to detect device state.

CNA Affected

[
  {
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "vendor": "Linux",
    "product": "Linux",
    "versions": [
      {
        "status": "affected",
        "version": "c52ca478233c",
        "lessThan": "4ecf25595273",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "c52ca478233c",
        "lessThan": "05b7791c4c4a",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "c52ca478233c",
        "lessThan": "0fff71c5a311",
        "versionType": "git"
      }
    ],
    "programFiles": [
      "drivers/dma/idxd/sysfs.c"
    ],
    "defaultStatus": "unaffected"
  },
  {
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "vendor": "Linux",
    "product": "Linux",
    "versions": [
      {
        "status": "affected",
        "version": "5.6"
      },
      {
        "status": "unaffected",
        "version": "0",
        "lessThan": "5.6",
        "versionType": "custom"
      },
      {
        "status": "unaffected",
        "version": "5.10.32",
        "versionType": "custom",
        "lessThanOrEqual": "5.10.*"
      },
      {
        "status": "unaffected",
        "version": "5.11.16",
        "versionType": "custom",
        "lessThanOrEqual": "5.11.*"
      },
      {
        "status": "unaffected",
        "version": "5.12",
        "versionType": "original_commit_for_fix",
        "lessThanOrEqual": "*"
      }
    ],
    "programFiles": [
      "drivers/dma/idxd/sysfs.c"
    ],
    "defaultStatus": "affected"
  }
]