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.

7005 vulnerabilities reference this CWE, most recent first.

CVE-2021-43824 (GCVE-0-2021-43824)

Vulnerability from cvelistv5 – Published: 2022-02-22 22:15 – Updated: 2025-04-23 19:01
VLAI
Title
Null pointer dereference in envoy
Summary
Envoy is an open source edge and service proxy, designed for cloud-native applications. In affected versions a crafted request crashes Envoy when a CONNECT request is sent to JWT filter configured with regex match. This provides a denial of service attack vector. The only workaround is to not use regex in the JWT filter. Users are advised to upgrade.
Severity
7.5 (High)
CVSS:3.1/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 2025-04-23 15:57 UTC
CWE
  • CWE-476 - NULL Pointer Dereference
Assigner
GitHub_M CNA under the mitre root
CNA scorecard C 72/100 over 7838 records in the last 180 days details
References
Impacted products
Vendor Product Version
envoyproxy envoy Affected: >= 1.20.0, < 1.20.2
Affected: >= 1.19.0, < 1.19.3
Affected: < 1.18.6
Affected: >= 1.21.0, < 1.21.1
Create a notification for this product.
Show details on NVD website
To clipboard 

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CVE-2021-43750 (GCVE-0-2021-43750)

Vulnerability from cvelistv5 – Published: 2021-12-20 20:08 – Updated: 2025-04-23 19:16
VLAI
Title
Adobe Premiere Rush NULL Pointer Dereference Local Denial-of-Service
Summary
Adobe Premiere Rush versions 1.5.16 (and earlier) are affected by a Null pointer dereference vulnerability. An unauthenticated attacker could leverage this vulnerability to achieve an application denial-of-service in the context of the current user. Exploitation of this issue requires user interaction in that a victim must open a malicious file.
Severity
5.5 (Medium)
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/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 2025-04-23 13:09 UTC
CWE
  • CWE-476 - NULL Pointer Dereference (CWE-476)
Assigner
adobe CNA under the mitre root
CNA scorecard C 75/100 over 817 records in the last 180 days details
References
Impacted products
Vendor Product Version
Adobe Premiere Rush Affected: unspecified , ≤ 1.5.16 (custom)
Affected: unspecified , ≤ None (custom)
Create a notification for this product.
Date Public
2021-12-14 00:00
Show details on NVD website
To clipboard 

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CVE-2021-43749 (GCVE-0-2021-43749)

Vulnerability from cvelistv5 – Published: 2021-12-20 20:08 – Updated: 2025-04-23 19:17
VLAI
Title
Adobe Premiere Rush NULL Pointer Dereference Local Denial-of-Service
Summary
Adobe Premiere Rush versions 1.5.16 (and earlier) are affected by a Null pointer dereference vulnerability. An unauthenticated attacker could leverage this vulnerability to achieve an application denial-of-service in the context of the current user. Exploitation of this issue requires user interaction in that a victim must open a malicious file.
Severity
5.5 (Medium)
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/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 2025-04-23 13:09 UTC
CWE
  • CWE-476 - NULL Pointer Dereference (CWE-476)
Assigner
adobe CNA under the mitre root
CNA scorecard C 75/100 over 817 records in the last 180 days details
References
Impacted products
Vendor Product Version
Adobe Premiere Rush Affected: unspecified , ≤ 1.5.16 (custom)
Affected: unspecified , ≤ None (custom)
Create a notification for this product.
Date Public
2021-12-14 00:00
Show details on NVD website
To clipboard 

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CVE-2021-43748 (GCVE-0-2021-43748)

Vulnerability from cvelistv5 – Published: 2021-12-20 20:08 – Updated: 2025-04-23 19:17
VLAI
Title
Adobe Premiere Rush NULL Pointer Dereference Local Denial-of-Service
Summary
Adobe Premiere Rush versions 1.5.16 (and earlier) are affected by a Null pointer dereference vulnerability. An unauthenticated attacker could leverage this vulnerability to achieve an application denial-of-service in the context of the current user. Exploitation of this issue requires user interaction in that a victim must open a malicious file.
Severity
5.5 (Medium)
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/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 2025-04-23 13:09 UTC
CWE
  • CWE-476 - NULL Pointer Dereference (CWE-476)
Assigner
adobe CNA under the mitre root
CNA scorecard C 75/100 over 817 records in the last 180 days details
References
Impacted products
Vendor Product Version
Adobe Premiere Rush Affected: unspecified , ≤ 1.5.16 (custom)
Affected: unspecified , ≤ None (custom)
Create a notification for this product.
Date Public
2021-12-14 00:00
Show details on NVD website
To clipboard 

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CVE-2021-43016 (GCVE-0-2021-43016)

Vulnerability from cvelistv5 – Published: 2021-11-22 15:33 – Updated: 2025-04-23 19:18
VLAI
Title
Adobe InCopy NULL Pointer Dereference Application Denial of Service
Summary
Adobe InCopy version 16.4 (and earlier) is affected by a Null pointer dereference vulnerability when parsing a specially crafted file. An unauthenticated attacker could leverage this vulnerability to achieve an application denial-of-service in the context of the current user. Exploitation of this issue requires user interaction in that a victim must open a malicious file.
Severity
5.5 (Medium)
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/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 2025-04-23 13:09 UTC
CWE
  • CWE-476 - NULL Pointer Dereference (CWE-476)
Assigner
adobe CNA under the mitre root
CNA scorecard C 75/100 over 817 records in the last 180 days details
References
Impacted products
Vendor Product Version
Adobe InCopy Affected: unspecified , ≤ 16.4 (custom)
Affected: unspecified , ≤ None (custom)
Create a notification for this product.
Date Public
2021-11-09 00:00
Show details on NVD website
To clipboard 

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CVE-2021-42733 (GCVE-0-2021-42733)

Vulnerability from cvelistv5 – Published: 2021-11-22 15:22 – Updated: 2025-04-23 19:19
VLAI
Title
Adobe Bridge NULL Pointer Dereference could lead to Application denial-of-service
Summary
Adobe Bridge version 11.1.1 (and earlier) is affected by a Null pointer dereference vulnerability when parsing a specially crafted file. An unauthenticated attacker could leverage this vulnerability to achieve an application denial-of-service in the context of the current user. Exploitation of this issue requires user interaction in that a victim must open a malicious file.
Severity
5.5 (Medium)
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/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 2025-04-23 13:09 UTC
CWE
  • CWE-476 - NULL Pointer Dereference (CWE-476)
Assigner
adobe CNA under the mitre root
CNA scorecard C 75/100 over 817 records in the last 180 days details
References
Impacted products
Vendor Product Version
Adobe Bridge Affected: unspecified , ≤ 11.1.1 (custom)
Affected: unspecified , ≤ None (custom)
Create a notification for this product.
Date Public
2021-10-26 00:00
Show details on NVD website
To clipboard 

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CVE-2021-42528 (GCVE-0-2021-42528)

Vulnerability from cvelistv5 – Published: 2022-05-02 22:24 – Updated: 2025-11-03 19:26
VLAI
Title
XMP-Toolkit Null Pointer Dereference Application denial-of-service
Summary
XMP Toolkit 2021.07 (and earlier) is affected by a Null pointer dereference vulnerability when parsing a specially crafted file. An unauthenticated attacker could leverage this vulnerability to achieve an application denial-of-service in the context of the current user. Exploitation of this issue requires user interaction in that a victim must open a malicious file.
Severity
5.5 (Medium)
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
CWE
  • CWE-476 - NULL Pointer Dereference (CWE-476)
Assigner
adobe CNA under the mitre root
CNA scorecard C 75/100 over 817 records in the last 180 days details
References
Impacted products
Vendor Product Version
Adobe XMP Toolkit Affected: unspecified , ≤ 2021.07 (custom)
Affected: unspecified , ≤ None (custom)
Create a notification for this product.
Date Public
2021-10-26 00:00
Show details on NVD website
To clipboard 

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CVE-2021-42376 (GCVE-0-2021-42376)

Vulnerability from cvelistv5 – Published: 2021-11-15 00:00 – Updated: 2024-08-04 03:30
VLAI
Summary
A NULL pointer dereference in Busybox's hush applet leads to denial of service when processing a crafted shell command, due to missing validation after a \x03 delimiter character. This may be used for DoS under very rare conditions of filtered command input.
Severity
No CVSS data available.
CWE
Assigner
JFROG CNA under the mitre root
CNA scorecard C 75/100 over 62 records in the last 180 days details
References
Impacted products
Vendor Product Version
busybox busybox Affected: unspecified , < 1.34.0 (custom)
Create a notification for this product.
Show details on NVD website
To clipboard 

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CVE-2021-42373 (GCVE-0-2021-42373)

Vulnerability from cvelistv5 – Published: 2021-11-15 00:00 – Updated: 2024-08-04 03:30
VLAI
Summary
A NULL pointer dereference in Busybox's man applet leads to denial of service when a section name is supplied but no page argument is given
Severity
No CVSS data available.
CWE
Assigner
JFROG CNA under the mitre root
CNA scorecard C 75/100 over 62 records in the last 180 days details
References
Impacted products
Vendor Product Version
busybox busybox Affected: unspecified , < 1.34.0 (custom)
Create a notification for this product.
Show details on NVD website
To clipboard 

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CVE-2021-42268 (GCVE-0-2021-42268)

Vulnerability from cvelistv5 – Published: 2021-11-18 16:41 – Updated: 2025-04-23 19:20
VLAI
Title
Adobe Animate FLA File Parsing Null Pointer Dereference Application Denial of Service
Summary
Adobe Animate version 21.0.9 (and earlier) is affected by a Null pointer dereference vulnerability when parsing a specially crafted FLA file. An unauthenticated attacker could leverage this vulnerability to achieve an application denial-of-service in the context of the current user. Exploitation of this issue requires user interaction in that a victim must open a malicious file.
Severity
5.5 (Medium)
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/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 2025-04-23 13:10 UTC
CWE
  • CWE-476 - NULL Pointer Dereference (CWE-476)
Assigner
adobe CNA under the mitre root
CNA scorecard C 75/100 over 817 records in the last 180 days details
References
Impacted products
Vendor Product Version
Adobe Animate Affected: unspecified , ≤ 21.0.9 (custom)
Affected: unspecified , ≤ None (custom)
Create a notification for this product.
Date Public
2021-10-26 00:00
Show details on NVD website
To clipboard 

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          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://helpx.adobe.com/security/products/animate/apsb21-105.html"
        }
      ],
      "source": {
        "discovery": "EXTERNAL"
      },
      "title": "Adobe Animate FLA File Parsing Null Pointer Dereference Application Denial of Service",
      "x_legacyV4Record": {
        "CVE_data_meta": {
          "ASSIGNER": "psirt@adobe.com",
          "DATE_PUBLIC": "2021-10-26T23:00:00.000Z",
          "ID": "CVE-2021-42268",
          "STATE": "PUBLIC",
          "TITLE": "Adobe Animate FLA File Parsing Null Pointer Dereference Application Denial of Service"
        },
        "affects": {
          "vendor": {
            "vendor_data": [
              {
                "product": {
                  "product_data": [
                    {
                      "product_name": "Animate",
                      "version": {
                        "version_data": [
                          {
                            "version_affected": "\u003c=",
                            "version_value": "21.0.9"
                          },
                          {
                            "version_affected": "\u003c=",
                            "version_value": "None"
                          },
                          {
                            "version_affected": "\u003c=",
                            "version_value": "None"
                          },
                          {
                            "version_affected": "\u003c=",
                            "version_value": "None"
                          }
                        ]
                      }
                    }
                  ]
                },
                "vendor_name": "Adobe"
              }
            ]
          }
        },
        "data_format": "MITRE",
        "data_type": "CVE",
        "data_version": "4.0",
        "description": {
          "description_data": [
            {
              "lang": "eng",
              "value": "Adobe Animate version 21.0.9 (and earlier) is affected by a Null pointer dereference vulnerability when parsing a specially crafted FLA file. An unauthenticated attacker could leverage this vulnerability to achieve an application denial-of-service in the context of the current user. Exploitation of this issue requires user interaction in that a victim must open a malicious file."
            }
          ]
        },
        "impact": {
          "cvss": {
            "attackComplexity": "Low",
            "attackVector": "Local",
            "availabilityImpact": "High",
            "baseScore": 5.5,
            "baseSeverity": "Medium",
            "confidentialityImpact": "None",
            "integrityImpact": "None",
            "privilegesRequired": "None",
            "scope": "Unchanged",
            "userInteraction": "Required",
            "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H",
            "version": "3.1"
          }
        },
        "problemtype": {
          "problemtype_data": [
            {
              "description": [
                {
                  "lang": "eng",
                  "value": "NULL Pointer Dereference (CWE-476)"
                }
              ]
            }
          ]
        },
        "references": {
          "reference_data": [
            {
              "name": "https://helpx.adobe.com/security/products/animate/apsb21-105.html",
              "refsource": "MISC",
              "url": "https://helpx.adobe.com/security/products/animate/apsb21-105.html"
            }
          ]
        },
        "source": {
          "discovery": "EXTERNAL"
        }
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "078d4453-3bcd-4900-85e6-15281da43538",
    "assignerShortName": "adobe",
    "cveId": "CVE-2021-42268",
    "datePublished": "2021-11-18T16:41:17.134Z",
    "dateReserved": "2021-10-12T00:00:00.000Z",
    "dateUpdated": "2025-04-23T19:20:44.064Z",
    "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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