CVE-2022-48753 block: fix memory leak in disk_register_independent_access_ranges

2024-06-2011:13:33

Linux

github.com

linux kernel

memory leak

vulnerability

fix

kobject_init_and_add

kobject_put

callback function

blk_ia_ranges_sysfs_release

cve-2022-48753

6.8 Medium

AI Score

Confidence

Low

0.0004 Low

EPSS

Percentile

9.1%

JSON

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

block: fix memory leak in disk_register_independent_access_ranges

kobject_init_and_add() takes reference even when it fails.
According to the doc of kobject_init_and_add()

If this function returns an error, kobject_put() must be called to
properly clean up the memory associated with the object.

Fix this issue by adding kobject_put().
Callback function blk_ia_ranges_sysfs_release() in kobject_put()
can handle the pointer “iars” properly.

CNA Affected

[
  {
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "vendor": "Linux",
    "product": "Linux",
    "versions": [
      {
        "status": "affected",
        "version": "a2247f19ee1c",
        "lessThan": "fe4214a07e0b",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "a2247f19ee1c",
        "lessThan": "83114df32ae7",
        "versionType": "git"
      }
    ],
    "programFiles": [
      "block/blk-ia-ranges.c"
    ],
    "defaultStatus": "unaffected"
  },
  {
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "vendor": "Linux",
    "product": "Linux",
    "versions": [
      {
        "status": "affected",
        "version": "5.16"
      },
      {
        "status": "unaffected",
        "version": "0",
        "lessThan": "5.16",
        "versionType": "custom"
      },
      {
        "status": "unaffected",
        "version": "5.16.5",
        "versionType": "custom",
        "lessThanOrEqual": "5.16.*"
      },
      {
        "status": "unaffected",
        "version": "5.17",
        "versionType": "original_commit_for_fix",
        "lessThanOrEqual": "*"
      }
    ],
    "programFiles": [
      "block/blk-ia-ranges.c"
    ],
    "defaultStatus": "affected"
  }
]