CVE-2021-47049 Drivers: hv: vmbus: Use after free in __vmbus_open()

2024-02-2808:13:52

Linux

www.cve.org

linux kernel

vulnerability resolved

use after free

error handling

cve

0.0004 Low

EPSS

Percentile

15.6%

JSON

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

Drivers: hv: vmbus: Use after free in __vmbus_open()

The “open_info” variable is added to the &vmbus_connection.chn_msg_list,
but the error handling frees “open_info” without removing it from the
list. This will result in a use after free. First remove it from the
list, and then free it.

CNA Affected

[
  {
    "product": "Linux",
    "vendor": "Linux",
    "defaultStatus": "unaffected",
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "programFiles": [
      "drivers/hv/channel.c"
    ],
    "versions": [
      {
        "version": "6f3d791f3006",
        "lessThan": "d5c7b42c9f56",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "6f3d791f3006",
        "lessThan": "f37dd5d1b5d3",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "6f3d791f3006",
        "lessThan": "2728f289b327",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "6f3d791f3006",
        "lessThan": "3e9bf43f7f7a",
        "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/hv/channel.c"
    ],
    "versions": [
      {
        "version": "4.14",
        "status": "affected"
      },
      {
        "version": "0",
        "lessThan": "4.14",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "5.10.37",
        "lessThanOrEqual": "5.10.*",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "5.11.21",
        "lessThanOrEqual": "5.11.*",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "5.12.4",
        "lessThanOrEqual": "5.12.*",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "5.13",
        "lessThanOrEqual": "*",
        "status": "unaffected",
        "versionType": "original_commit_for_fix"
      }
    ]
  }
]