CVE-2021-47476

2024-05-2209:15:09

416baaa9-dc9f-4396-8d5f-8c081fb06d67

web.nvd.nist.gov

linux kernel

comedi

ni_usb6501

vulnerability

usb

transfer buffers

buffer overflow

sanity checks

probe

nvd

6.7 Medium

AI Score

Confidence

Low

0.0004 Low

EPSS

Percentile

13.1%

JSON

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

comedi: ni_usb6501: fix NULL-deref in command paths

The driver uses endpoint-sized USB transfer buffers but had no sanity
checks on the sizes. This can lead to zero-size-pointer dereferences or
overflowed transfer buffers in ni6501_port_command() and
ni6501_counter_command() if a (malicious) device has smaller max-packet
sizes than expected (or when doing descriptor fuzz testing).

Add the missing sanity checks to probe().

Affected configurations

Vulners

Node

linuxlinux_kernelRange3.18–4.4.292

linuxlinux_kernelRange4.5.0–4.9.290

linuxlinux_kernelRange4.10.0–4.14.255

linuxlinux_kernelRange4.15.0–4.19.217

linuxlinux_kernelRange4.20.0–5.4.159

linuxlinux_kernelRange5.5.0–5.10.79

linuxlinux_kernelRange5.11.0–5.14.18

linuxlinux_kernelRange5.15.0–5.15.2

linuxlinux_kernelRange5.16.0≥

CNA Affected

[
  {
    "product": "Linux",
    "vendor": "Linux",
    "defaultStatus": "unaffected",
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "programFiles": [
      "drivers/comedi/drivers/ni_usb6501.c"
    ],
    "versions": [
      {
        "version": "a03bb00e50ab",
        "lessThan": "58478143771b",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "a03bb00e50ab",
        "lessThan": "aa3973842350",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "a03bb00e50ab",
        "lessThan": "df7b1238f3b5",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "a03bb00e50ab",
        "lessThan": "bc51111bf6e8",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "a03bb00e50ab",
        "lessThan": "b0156b7c9649",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "a03bb00e50ab",
        "lessThan": "ef143dc0c3de",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "a03bb00e50ab",
        "lessThan": "4a9d43cb5d5f",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "a03bb00e50ab",
        "lessThan": "d6a727a681a3",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "a03bb00e50ab",
        "lessThan": "907767da8f3a",
        "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/comedi/drivers/ni_usb6501.c"
    ],
    "versions": [
      {
        "version": "3.18",
        "status": "affected"
      },
      {
        "version": "0",
        "lessThan": "3.18",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "4.4.292",
        "lessThanOrEqual": "4.4.*",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "4.9.290",
        "lessThanOrEqual": "4.9.*",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "4.14.255",
        "lessThanOrEqual": "4.14.*",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "4.19.217",
        "lessThanOrEqual": "4.19.*",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "5.4.159",
        "lessThanOrEqual": "5.4.*",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "5.10.79",
        "lessThanOrEqual": "5.10.*",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "5.14.18",
        "lessThanOrEqual": "5.14.*",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "5.15.2",
        "lessThanOrEqual": "5.15.*",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "5.16",
        "lessThanOrEqual": "*",
        "status": "unaffected",
        "versionType": "original_commit_for_fix"
      }
    ]
  }
]