CVE-2020-11935 aufs: improperly managed inode reference counts in the vfsub_dentry_open() method

2023-04-0700:00:00

CWE-911

canonical

www.cve.org

cve-2020-11935

aufs

insecure

inode

reference counts

denial of service

CVSS3

4.4

Attack Vector

LOCAL

Attack Complexity

LOW

Privileges Required

HIGH

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

HIGH

CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H

AI Score

5.9

Confidence

High

EPSS

Percentile

5.1%

JSON

It was discovered that aufs improperly managed inode reference counts in the vfsub_dentry_open() method. A local attacker could use this vulnerability to cause a denial of service attack.

CNA Affected

[
  {
    "vendor": "Ubuntu",
    "product": "Linux kernel (aufs filesystem module)",
    "versions": [
      {
        "version": "4.4.0-186.216",
        "status": "unaffected",
        "lessThan": "4.4*",
        "versionType": "custom"
      },
      {
        "version": "4.15.0-112.113",
        "status": "unaffected",
        "lessThan": "4.15*",
        "versionType": "custom"
      },
      {
        "version": "5.4.0-42.46",
        "status": "unaffected",
        "lessThan": "5.4*",
        "versionType": "custom"
      }
    ]
  }
]