CVE-2022-48927 iio: adc: tsc2046: fix memory corruption by preventing array overflow

2024-08-2203:31:19

Linux

www.cve.org

linux kernel

iio

adc

tsc2046

memory corruption

array overflow

vulnerability

resolution

software timestamp channel

EPSS

Percentile

5.0%

JSON

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

iio: adc: tsc2046: fix memory corruption by preventing array overflow

On one side we have indio_dev->num_channels includes all physical channels +
timestamp channel. On other side we have an array allocated only for
physical channels. So, fix memory corruption by ARRAY_SIZE() instead of
num_channels variable.

Note the first case is a cleanup rather than a fix as the software
timestamp channel bit in active_scanmask is never set by the IIO core.

CNA Affected

[
  {
    "product": "Linux",
    "vendor": "Linux",
    "defaultStatus": "unaffected",
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "programFiles": [
      "drivers/iio/adc/ti-tsc2046.c"
    ],
    "versions": [
      {
        "version": "9374e8f5a38d",
        "lessThan": "0cb9b2f73c18",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "9374e8f5a38d",
        "lessThan": "082d2c047b0d",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "9374e8f5a38d",
        "lessThan": "b7a78a8adaa8",
        "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/iio/adc/ti-tsc2046.c"
    ],
    "versions": [
      {
        "version": "5.14",
        "status": "affected"
      },
      {
        "version": "0",
        "lessThan": "5.14",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "5.15.26",
        "lessThanOrEqual": "5.15.*",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "5.16.12",
        "lessThanOrEqual": "5.16.*",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "5.17",
        "lessThanOrEqual": "*",
        "status": "unaffected",
        "versionType": "original_commit_for_fix"
      }
    ]
  }
]