Common Weakness Enumeration

CWE-911

Allowed

Improper Update of Reference Count

Abstraction: Base · Status: Incomplete

API response cwe.mitre.org

The product uses a reference count to manage a resource, but it does not update or incorrectly updates the reference count.

16 vulnerabilities reference this CWE, most recent first.

CVE-2023-2019 (GCVE-0-2023-2019)

Vulnerability from cvelistv5 – Published: 2023-04-24 00:00 – Updated: 2025-03-18 19:17
VLAI
Summary
A flaw was found in the Linux kernel's netdevsim device driver, within the scheduling of events. This issue results from the improper management of a reference count. This may allow an attacker to create a denial of service condition on the system.
Severity
4.4 (Medium)
CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2025-03-06 15:56 UTC
CWE
Assigner
redhat CNA
References
Impacted products
Vendor Product Version
n/a Linux kernel's netdevsim device driver Affected: Fixed in kernel v6.0-rc1
Show details on NVD website
To clipboard 

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CVE-2022-37012 (GCVE-0-2022-37012)

Vulnerability from cvelistv5 – Published: 2023-03-29 00:00 – Updated: 2025-02-18 19:34
VLAI
Summary
This vulnerability allows remote attackers to create a denial-of-service condition on affected installations of Unified Automation OPC UA C++ Demo Server 1.7.6-537. Authentication is not required to exploit this vulnerability. The specific flaw exists within the OpcUa_SecureListener_ProcessSessionCallRequest method. A crafted OPC UA message can force the server to incorrectly update a reference count. An attacker can leverage this vulnerability to create a denial-of-service condition on the system. Was ZDI-CAN-16927.
Severity
7.5 (High)
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
SSVC
Exploitation: none Automatable: yes Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2025-02-18 19:34 UTC
CWE
  • CWE-911 - Improper Update of Reference Count
Assigner
zdi CNA
References
Impacted products
Credits
20urdjk
Show details on NVD website
To clipboard 

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CVE-2022-29581 (GCVE-0-2022-29581)

Vulnerability from cvelistv5 – Published: 2022-05-17 16:50 – Updated: 2025-04-21 13:53
VLAI
Summary
Improper Update of Reference Count vulnerability in net/sched of Linux Kernel allows local attacker to cause privilege escalation to root. This issue affects: Linux Kernel versions prior to 5.18; version 4.14 and later versions.
Severity
7.8 (High)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
SSVC
Exploitation: poc Automatable: no Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2025-04-21 13:39 UTC
CWE
  • CWE-911 - Improper Update of Reference Count
Assigner
Google CNA
References
Impacted products
Vendor Product Version
Linux Kernel Affected: unspecified , < 5.18 (custom)
Affected: 4.14 , < unspecified (custom)
Create a notification for this product.
Credits
syzbot <syzkaller@googlegroups.com>
Show details on NVD website
To clipboard 

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CVE-2022-22195 (GCVE-0-2022-22195)

Vulnerability from cvelistv5 – Published: 2022-04-14 15:50 – Updated: 2024-09-16 23:11
VLAI
Title
Junos OS Evolved: Specific packets reaching the RE lead to a counter overflow and eventually a crash
Summary
An Improper Update of Reference Count vulnerability in the kernel of Juniper Networks Junos OS Evolved allows an unauthenticated, network-based attacker to trigger a counter overflow, eventually causing a Denial of Service (DoS). This issue affects Juniper Networks Junos OS Evolved: All versions prior to 20.4R3-S1-EVO; 21.1 versions prior to 21.1R3-EVO; 21.2 versions prior to 21.2R3-EVO; 21.3 versions prior to 21.3R2-EVO. This issue does not affect Juniper Networks Junos OS.
Severity
7.5 (High)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CWE
  • CWE-911 - Improper Update of Reference Count
  • Denial of Service (DoS)
Assigner
juniper CNA
References
URL Tags
https://kb.juniper.net/JSA69508 x_refsource_CONFIRM
Impacted products
Vendor Product Version
Juniper Networks Junos OS Evolved Affected: unspecified , < 20.4R3-S1-EVO (custom)
Affected: 21.1 , < 21.1R3-EVO (custom)
Affected: 21.2 , < 21.2R3-EVO (custom)
Affected: 21.3 , < 21.3R2-EVO (custom)
Create a notification for this product.
Juniper Networks Junos OS Unaffected: any
Create a notification for this product.
Date Public
2022-04-13 00:00
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CVE-2022-1678 (GCVE-0-2022-1678)

Vulnerability from cvelistv5 – Published: 2022-05-25 14:49 – Updated: 2024-08-03 00:10
VLAI
Summary
An issue was discovered in the Linux Kernel from 4.18 to 4.19, an improper update of sock reference in TCP pacing can lead to memory/netns leak, which can be used by remote clients.
Severity
5.9 (Medium)
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
CWE
  • CWE-911 - Improper Update of Reference Count
Assigner
Anolis CNA
References
Impacted products
Vendor Product Version
n/a kernel Affected: 4.18 , < unspecified (custom)
Affected: unspecified , ≤ 4.19 (custom)
Show details on NVD website
To clipboard 

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CVE-2020-11935 (GCVE-0-2020-11935)

Vulnerability from cvelistv5 – Published: 2023-04-07 00:00 – Updated: 2024-08-04 11:42
VLAI
Title
aufs: improperly managed inode reference counts in the vfsub_dentry_open() method
Summary
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.
Severity
4.4 (Medium)
CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H
CWE
  • CWE-911 - Improper Update of Reference Count
Assigner
canonical CNA
References
Impacted products
Vendor Product Version
Ubuntu Linux kernel (aufs filesystem module) Unaffected: 4.4.0-186.216 , < 4.4* (custom)
Unaffected: 4.15.0-112.113 , < 4.15* (custom)
Unaffected: 5.4.0-42.46 , < 5.4* (custom)
Create a notification for this product.
Credits
Mauricio Faria de Oliveira discovered that the aufs implementation in the Linux kernel improperly managed inode reference counts in the vfsub_dentry_open() method. A local attacker could use this vulnerability to cause a denial of service.
Show details on NVD website
To clipboard 

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          "value": "Mauricio Faria de Oliveira discovered that the aufs implementation in the Linux kernel improperly managed inode reference counts in the vfsub_dentry_open() method. A local attacker could use this vulnerability to cause a denial of service."
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      ],
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          "lang": "en",
          "value": "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."
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          "cvssV3_1": {
            "attackComplexity": "LOW",
            "attackVector": "LOCAL",
            "availabilityImpact": "HIGH",
            "baseScore": 4.4,
            "baseSeverity": "MEDIUM",
            "confidentialityImpact": "NONE",
            "integrityImpact": "NONE",
            "privilegesRequired": "HIGH",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H",
            "version": "3.1"
          }
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      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-911",
              "description": "CWE-911 Improper Update of Reference Count",
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              "type": "CWE"
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        }
      ],
      "providerMetadata": {
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        "orgId": "cc1ad9ee-3454-478d-9317-d3e869d708bc",
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          "name": "Ubuntu Security CVE-2020-11935",
          "tags": [
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          "url": "https://ubuntu.com/security/CVE-2020-11935"
        },
        {
          "name": "Launchpad Bug 1873074",
          "tags": [
            "vendor-advisory"
          ],
          "url": "https://bugs.launchpad.net/bugs/1873074"
        }
      ],
      "source": {
        "defect": [
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        ],
        "discovery": "USER"
      },
      "title": "aufs: improperly managed inode reference counts in the vfsub_dentry_open() method",
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  },
  "cveMetadata": {
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    "cveId": "CVE-2020-11935",
    "datePublished": "2023-04-07T00:00:00.000Z",
    "dateReserved": "2020-04-20T00:00:00.000Z",
    "dateUpdated": "2024-08-04T11:42:00.593Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1"
}

No mitigation information available for this CWE.

No CAPEC attack patterns related to this CWE.

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