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cvelistCanonicalCVELIST:CVE-2020-11935
HistoryApr 07, 2023 - 12:00 a.m.

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
1
cve-2020-11935
aufs
insecure
inode
reference counts
denial of service

4.4 Medium

CVSS3

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

5.9 Medium

AI Score

Confidence

High

0.0004 Low

EPSS

Percentile

5.1%

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"
      }
    ]
  }
]

4.4 Medium

CVSS3

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

5.9 Medium

AI Score

Confidence

High

0.0004 Low

EPSS

Percentile

5.1%