Common Weakness Enumeration

CWE-476

Allowed

NULL Pointer Dereference

Abstraction: Base · Status: Stable

API response cwe.mitre.org

The product dereferences a pointer that it expects to be valid but is NULL.

6310 vulnerabilities reference this CWE, most recent first.

CVE-2021-26927 (GCVE-0-2021-26927)

Vulnerability from cvelistv5 – Published: 2021-02-23 19:03 – Updated: 2024-08-03 20:33
VLAI
Summary
A flaw was found in jasper before 2.0.25. A null pointer dereference in jp2_decode in jp2_dec.c may lead to program crash and denial of service.
Severity
No CVSS data available.
CWE
Assigner
References
Impacted products
Vendor Product Version
n/a jasper Affected: before 2.0.25
Show details on NVD website
To clipboard 

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CVE-2021-25674 (GCVE-0-2021-25674)

Vulnerability from cvelistv5 – Published: 2021-03-15 17:03 – Updated: 2024-08-03 20:11
VLAI
Summary
A vulnerability has been identified in SIMATIC S7-PLCSIM V5.4 (All versions). An attacker with local access to the system could cause a Denial-of-Service condition in the application when it is used to open a specially crafted file. As a consequence, a NULL pointer deference condition could cause the application to terminate unexpectedly and must be restarted to restore the service.
Severity
No CVSS data available.
CWE
  • CWE-476 - NULL Pointer Dereference
Assigner
References
Impacted products
Vendor Product Version
Siemens SIMATIC S7-PLCSIM V5.4 Affected: All versions
Create a notification for this product.
Show details on NVD website
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CVE-2021-25491 (GCVE-0-2021-25491)

Vulnerability from cvelistv5 – Published: 2021-10-06 17:10 – Updated: 2024-08-03 20:03
VLAI
Summary
A vulnerability in mfc driver prior to SMR Oct-2021 Release 1 allows memory corruption via NULL-pointer dereference.
Severity
2.3 (Low)
CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:L
CWE
  • CWE-476 - Null Pointer Dereference
Assigner
References
Impacted products
Vendor Product Version
Samsung Mobile Samsung Mobile Devices Affected: P(9.0), Q(10.0), R(11.0) , < SMR Oct-2021 Release 1 (custom)
Create a notification for this product.
Show details on NVD website
To clipboard 

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CVE-2021-25462 (GCVE-0-2021-25462)

Vulnerability from cvelistv5 – Published: 2021-09-09 18:05 – Updated: 2024-08-03 20:03
VLAI
Summary
NULL pointer dereference vulnerability in NPU driver prior to SMR Sep-2021 Release 1 allows attackers to cause memory corruption.
Severity
3.3 (Low)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N
CWE
  • CWE-476 - NULL Pointer Dereference
Assigner
References
Impacted products
Vendor Product Version
Samsung Mobile Samsung Mobile Devices Affected: P(9.0), Q(10.0) , R(11.0) devices with Exynos chipsets , < SMR Sep-2021 Release 1 (custom)
Create a notification for this product.
Show details on NVD website
To clipboard 

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CVE-2021-25458 (GCVE-0-2021-25458)

Vulnerability from cvelistv5 – Published: 2021-09-09 18:04 – Updated: 2024-08-03 20:03
VLAI
Summary
NULL pointer dereference vulnerability in ION driver prior to SMR Sep-2021 Release 1 allows attackers to cause memory corruption.
Severity
3.3 (Low)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N
CWE
  • CWE-476 - NULL Pointer Dereference
Assigner
References
Impacted products
Vendor Product Version
Samsung Mobile Samsung Mobile Devices Affected: O(8.1), P(9.0), Q(10.0) , R(11.0) devices with Exynos chipsets , < SMR Sep-2021 Release 1 (custom)
Create a notification for this product.
Show details on NVD website
To clipboard 

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CVE-2021-23883 (GCVE-0-2021-23883)

Vulnerability from cvelistv5 – Published: 2021-02-10 09:25 – Updated: 2024-09-17 01:41
VLAI
Title
Null Pointer Dereference vulnerability in McAfee Endpoint Security (ENS)
Summary
A Null Pointer Dereference vulnerability in McAfee Endpoint Security (ENS) for Windows prior to 10.7.0 February 2021 Update allows a local administrator to cause Windows to crash via a specific system call which is not handled correctly. This varies by machine and had partial protection prior to this update.
Severity
4 (Medium)
CVSS:3.1/AV:L/AC:H/PR:H/UI:R/S:U/C:N/I:N/A:H
CWE
  • CWE-476 - NULL Pointer Dereference
Assigner
References
Impacted products
Vendor Product Version
McAfee LLC Endpoint Security (ENS) for Windows Affected: 10.7.x , < 10.7.0 February 2021 (custom)
Create a notification for this product.
Date Public
2021-02-10 00:00
Credits
Alain Rödel from cirosec GmbH
Show details on NVD website
To clipboard 

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CVE-2021-23191 (GCVE-0-2021-23191)

Vulnerability from cvelistv5 – Published: 2022-03-02 22:28 – Updated: 2024-08-03 19:05
VLAI
Summary
A security issue was found in htmldoc v1.9.12 and before. A NULL pointer dereference in the function image_load_jpeg() in image.cxx may result in denial of service.
Severity
No CVSS data available.
CWE
  • CWE-476 - - NULL Pointer Dereference
Assigner
References
Impacted products
Vendor Product Version
n/a htmldoc Affected: Fixed in htmldoc v1.9.12 and later.
Show details on NVD website
To clipboard 

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CVE-2021-23180 (GCVE-0-2021-23180)

Vulnerability from cvelistv5 – Published: 2022-03-02 22:29 – Updated: 2024-08-03 19:05
VLAI
Summary
A flaw was found in htmldoc in v1.9.12 and before. Null pointer dereference in file_extension(),in file.c may lead to execute arbitrary code and denial of service.
Severity
No CVSS data available.
CWE
  • CWE-476 - - NULL Pointer Dereference, CWE-400 - Uncontrolled Resource Consumption
Assigner
References
Impacted products
Vendor Product Version
n/a htmldoc Affected: Fixed in htmldoc v1.9.12 and above.
Show details on NVD website
To clipboard 

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CVE-2021-22792 (GCVE-0-2021-22792)

Vulnerability from cvelistv5 – Published: 2021-09-02 16:53 – Updated: 2026-05-29 13:59
VLAI
Summary
A CWE-476: NULL Pointer Dereference vulnerability that could cause a Denial of Service on the Modicon PLC controller / simulator when updating the controller application with a specially crafted project file exists in Modicon M580 CPU (part numbers BMEP* and BMEH*, all versions), Modicon M340 CPU (part numbers BMXP34*, all versions), Modicon MC80 (part numbers BMKC80*, all versions), Modicon Momentum Ethernet CPU (part numbers 171CBU*, all versions), PLC Simulator for EcoStruxureª Control Expert, including all Unity Pro versions (former name of EcoStruxureª Control Expert, all versions), PLC Simulator for EcoStruxureª Process Expert including all HDCS versions (former name of EcoStruxureª Process Expert, all versions), Modicon Quantum CPU (part numbers 140CPU*, all versions), Modicon Premium CPU (part numbers TSXP5*, all versions).
Severity
6.5 (Medium)
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
  • CWE-476 - NULL Pointer Dereference
Assigner
References
Impacted products
Vendor Product Version
n/a Modicon M580 CPU (part numbers BMEP* and BMEH*, all versions), Modicon M340 CPU (part numbers BMXP34*, all versions), Modicon MC80 (part numbers BMKC80*, all versions), Modicon Momentum Ethernet CPU (part numbers 171CBU*, all versions), PLC Simulator for EcoStruxureª Control Expert, including all Unity Pro versions (former name of EcoStruxureª Control Expert, all versions), PLC Simulator for EcoStruxureª Process Expert including all HDCS versions (former name of EcoStruxureª Process Expert, all versions), Modicon Quantum CPU (part numbers 140CPU*, all versions), Modicon Premium CPU (part numbers TSXP5*, all versions) Affected: Modicon M580 CPU (part numbers BMEP* and BMEH*, all versions), Modicon M340 CPU (part numbers BMXP34*, all versions), Modicon MC80 (part numbers BMKC80*, all versions), Modicon Momentum Ethernet CPU (part numbers 171CBU*, all versions), PLC Simulator for EcoStruxureª Control Expert, including all Unity Pro versions (former name of EcoStruxureª Control Expert, all versions), PLC Simulator for EcoStruxureª Process Expert including all HDCS versions (former name of EcoStruxureª Process Expert, all versions), Modicon Quantum CPU (part numbers 140CPU*, all versions), Modicon Premium CPU (part numbers TSXP5*, all versions)
Show details on NVD website
To clipboard 

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CVE-2021-22570 (GCVE-0-2021-22570)

Vulnerability from cvelistv5 – Published: 2022-01-26 00:00 – Updated: 2025-04-21 13:56
VLAI
Title
Nullptr Dereference in Protobuf
Summary
Nullptr dereference when a null char is present in a proto symbol. The symbol is parsed incorrectly, leading to an unchecked call into the proto file's name during generation of the resulting error message. Since the symbol is incorrectly parsed, the file is nullptr. We recommend upgrading to version 3.15.0 or greater.
Severity
6.5 (Medium)
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
  • CWE-476 - NULL Pointer Dereference
Assigner
References
Impacted products
Vendor Product Version
Google LLC Protobuf Affected: unspecified , < 3.15.0 (custom)
Create a notification for this product.
Show details on NVD website
To clipboard 

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        },
        {
          "name": "FEDORA-2022-fedff53e4e",
          "tags": [
            "vendor-advisory"
          ],
          "url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/NVTWVQRB5OCCTMKEQFY5MYED3DXDVSLP/"
        },
        {
          "name": "FEDORA-2022-486d5f349d",
          "tags": [
            "vendor-advisory"
          ],
          "url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/BTRGBRC5KGCA4SK5MUNLPYJRAGXMBIYY/"
        },
        {
          "name": "FEDORA-2022-d1a15f9cdb",
          "tags": [
            "vendor-advisory"
          ],
          "url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/5PAGL5M2KGYPN3VEQCRJJE6NA7D5YG5X/"
        },
        {
          "name": "FEDORA-2022-49b52819a4",
          "tags": [
            "vendor-advisory"
          ],
          "url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/KQJB6ZPRLKV6WCMX2PRRRQBFAOXFBK6B/"
        },
        {
          "name": "FEDORA-2022-57923346cf",
          "tags": [
            "vendor-advisory"
          ],
          "url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/MRWRAXAFR3JR7XCFWTHC2KALSZKWACCE/"
        },
        {
          "url": "https://www.oracle.com/security-alerts/cpuapr2022.html"
        },
        {
          "url": "https://security.netapp.com/advisory/ntap-20220429-0005/"
        },
        {
          "name": "[debian-lts-announce] 20230418 [SECURITY] [DLA 3393-1] protobuf security update",
          "tags": [
            "mailing-list"
          ],
          "url": "https://lists.debian.org/debian-lts-announce/2023/04/msg00019.html"
        }
      ],
      "source": {
        "discovery": "INTERNAL"
      },
      "title": "Nullptr Dereference in Protobuf",
      "x_generator": {
        "engine": "Vulnogram 0.0.9"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "14ed7db2-1595-443d-9d34-6215bf890778",
    "assignerShortName": "Google",
    "cveId": "CVE-2021-22570",
    "datePublished": "2022-01-26T00:00:00.000Z",
    "dateReserved": "2021-01-05T00:00:00.000Z",
    "dateUpdated": "2025-04-21T13:56:58.459Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1"
}
Mitigation MIT-56
Implementation

For any pointers that could have been modified or provided from a function that can return NULL, check the pointer for NULL before use. When working with a multithreaded or otherwise asynchronous environment, ensure that proper locking APIs are used to lock before the check, and unlock when it has finished [REF-1484].

Mitigation
Requirements

Select a programming language that is not susceptible to these issues.

Mitigation
Implementation

Check the results of all functions that return a value and verify that the value is non-null before acting upon it.

Mitigation
Architecture and Design

Identify all variables and data stores that receive information from external sources, and apply input validation to make sure that they are only initialized to expected values.

Mitigation
Implementation

Explicitly initialize all variables and other data stores, either during declaration or just before the first usage.

No CAPEC attack patterns related to this CWE.

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