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.

7014 vulnerabilities reference this CWE, most recent first.

CVE-2020-27819 (GCVE-0-2020-27819)

Vulnerability from cvelistv5 – Published: 2021-02-23 03:40 – Updated: 2024-08-04 16:25
VLAI
Summary
An issue was discovered in libxls before and including 1.6.1 when reading Microsoft Excel files. A NULL pointer dereference vulnerability exists when parsing XLS cells in libxls/xls2csv.c:199. It could allow a remote attacker to cause a denial of service via crafted XLS file.
Severity
No CVSS data available.
CWE
Assigner
redhat CNA under the redhat root
CNA scorecard B 82/100 over 1062 records in the last 180 days details
References
Impacted products
Vendor Product Version
n/a libxls Affected: libxls before 1.6.2
Show details on NVD website
To clipboard 

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CVE-2020-27279 (GCVE-0-2020-27279)

Vulnerability from cvelistv5 – Published: 2021-01-06 15:03 – Updated: 2026-06-02 20:09
VLAI
Summary
A NULL pointer deference vulnerability has been identified in the protocol converter. An attacker could send a specially crafted packet that could reboot the device running Crimson 3.1 (Build versions prior to 3119.001).
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 2026-06-02 20:09 UTC
CWE
  • CWE-476 - NULL POINTER DEREFERENCE CWE-476
Assigner
icscert CNA under the icscert root
CNA scorecard B 75/100 over 349 records in the last 180 days details
References
Impacted products
Vendor Product Version
n/a Crimson 3.1 Affected: Build versions prior to 3119.001
Show details on NVD website
To clipboard 

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CVE-2020-26235 (GCVE-0-2020-26235)

Vulnerability from cvelistv5 – Published: 2020-11-24 21:20 – Updated: 2024-08-04 15:56
VLAI
Title
Segmentation fault in Rust time crate
Summary
In Rust time crate from version 0.2.7 and before version 0.2.23, unix-like operating systems may segfault due to dereferencing a dangling pointer in specific circumstances. This requires the user to set any environment variable in a different thread than the affected functions. The affected functions are time::UtcOffset::local_offset_at, time::UtcOffset::try_local_offset_at, time::UtcOffset::current_local_offset, time::UtcOffset::try_current_local_offset, time::OffsetDateTime::now_local and time::OffsetDateTime::try_now_local. Non-Unix targets are unaffected. This includes Windows and wasm. The issue was introduced in version 0.2.7 and fixed in version 0.2.23.
Severity
5.3 (Medium)
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H
CWE
  • CWE-476 - NULL Pointer Dereference
Assigner
GitHub_M CNA under the mitre root
CNA scorecard C 72/100 over 7926 records in the last 180 days details
References
Impacted products
Vendor Product Version
time-rs time Affected: >= 0.2.7, <0.2.23
Create a notification for this product.
Show details on NVD website
To clipboard 

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CVE-2020-26213 (GCVE-0-2020-26213)

Vulnerability from cvelistv5 – Published: 2020-11-06 16:45 – Updated: 2024-08-04 15:49
VLAI
Title
Denial of Service in teler
Summary
In teler before version 0.0.1, if you run teler inside a Docker container and encounter `errors.Exit` function, it will cause denial-of-service (`SIGSEGV`) because it doesn't get process ID and process group ID of teler properly to kills. The issue is patched in teler 0.0.1 and 0.0.1-dev5.1.
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-476 - {"CWE-476":"NULL Pointer Dereference"}
Assigner
GitHub_M CNA under the mitre root
CNA scorecard C 72/100 over 7926 records in the last 180 days details
References
Impacted products
Vendor Product Version
kitabisa teler Affected: < 0.0.1
Create a notification for this product.
Show details on NVD website
To clipboard 

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CVE-2020-25858 (GCVE-0-2020-25858)

Vulnerability from cvelistv5 – Published: 2020-10-15 15:11 – Updated: 2024-08-04 15:49
VLAI
Summary
The QCMAP_Web_CLIENT binary in the Qualcomm QCMAP software suite prior to versions released in October 2020 does not validate the return value of a strstr() or strchr() call in the Tokenizer() function. An attacker who invokes the web interface with a crafted URL can crash the process, causing denial of service. This version of QCMAP is used in many kinds of networking devices, primarily mobile hotspots and LTE routers.
Severity
No CVSS data available.
CWE
  • CWE-476 - Remote authenticated null dereference (CWE-476)
Assigner
VDOO CNA
CNA scorecard – unranked: 0 records in the last 180 days, 10 needed details
References
Impacted products
Vendor Product Version
n/a Qualcomm QCMAP Affected: Fixed in October 2020
Show details on NVD website
To clipboard 

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CVE-2020-25692 (GCVE-0-2020-25692)

Vulnerability from cvelistv5 – Published: 2020-12-08 00:06 – Updated: 2026-10-14 09:35
VLAI
Summary
A NULL pointer dereference was found in OpenLDAP server and was fixed in openldap 2.4.55, during a request for renaming RDNs. An unauthenticated attacker could remotely crash the slapd process by sending a specially crafted request, causing a Denial of Service.
Severity
No CVSS data available.
CWE
Assigner
redhat CNA under the redhat root
CNA scorecard B 82/100 over 1062 records in the last 180 days details
References
Impacted products
Show details on NVD website
To clipboard 

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CVE-2020-25639 (GCVE-0-2020-25639)

Vulnerability from cvelistv5 – Published: 2021-03-04 21:56 – Updated: 2026-10-08 21:03
VLAI
Summary
A NULL pointer dereference flaw was found in the Linux kernel's GPU Nouveau driver functionality in versions prior to 5.12-rc1 in the way the user calls ioctl DRM_IOCTL_NOUVEAU_CHANNEL_ALLOC. This flaw allows a local user to crash the system.
Severity
No CVSS data available.
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-10-08 21:00 UTC
CWE
Assigner
redhat CNA under the redhat root
CNA scorecard B 82/100 over 1062 records in the last 180 days details
References
Impacted products
Vendor Product Version
n/a kernel Affected: Linux kernel versions prior to 5.12-rc1
Show details on NVD website
To clipboard 

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CVE-2020-24421 (GCVE-0-2020-24421)

Vulnerability from cvelistv5 – Published: 2020-10-21 21:28 – Updated: 2024-09-16 20:07
VLAI
Title
Adobe InDesign 15.1.2 NULL Pointer Dereference Bug
Summary
Adobe InDesign version 15.1.2 (and earlier) is affected by a NULL pointer dereference bug that occurs when handling a malformed .indd file. The impact is limited to causing a denial-of-service of the client application. User interaction is required to exploit this issue.
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 818 records in the last 180 days details
References
Impacted products
Vendor Product Version
Adobe InDesign Affected: unspecified , ≤ 15.1.2 (custom)
Affected: unspecified , ≤ None (custom)
Create a notification for this product.
Date Public
2020-10-20 00:00
Show details on NVD website
To clipboard 

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CVE-2020-17525 (GCVE-0-2020-17525)

Vulnerability from cvelistv5 – Published: 2021-03-17 09:20 – Updated: 2025-02-13 16:27
VLAI
Title
Remote unauthenticated denial-of-service in Subversion mod_authz_svn
Summary
Subversion's mod_authz_svn module will crash if the server is using in-repository authz rules with the AuthzSVNReposRelativeAccessFile option and a client sends a request for a non-existing repository URL. This can lead to disruption for users of the service. This issue was fixed in mod_dav_svn+mod_authz_svn servers 1.14.1 and mod_dav_svn+mod_authz_svn servers 1.10.7
Severity
No CVSS data available.
CWE
  • CWE-476 - NULL Pointer Dereference
Assigner
apache CNA under the mitre root
CNA scorecard B 76/100 over 1090 records in the last 180 days details
References
Impacted products
Vendor Product Version
Apache Software Foundation Apache Subversion Unaffected: mod_authz_svn 1.10.7
Affected: mod_authz_svn , < 1.14.1 (custom)
Create a notification for this product.
Credits
Thomas Åkesson (simonsoft.se)
Show details on NVD website
To clipboard 

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CVE-2020-15209 (GCVE-0-2020-15209)

Vulnerability from cvelistv5 – Published: 2020-09-25 18:45 – Updated: 2024-08-04 13:08
VLAI
Title
Null pointer dereference in tensorflow-lite
Summary
In tensorflow-lite before versions 1.15.4, 2.0.3, 2.1.2, 2.2.1 and 2.3.1, a crafted TFLite model can force a node to have as input a tensor backed by a `nullptr` buffer. This can be achieved by changing a buffer index in the flatbuffer serialization to convert a read-only tensor to a read-write one. The runtime assumes that these buffers are written to before a possible read, hence they are initialized with `nullptr`. However, by changing the buffer index for a tensor and implicitly converting that tensor to be a read-write one, as there is nothing in the model that writes to it, we get a null pointer dereference. The issue is patched in commit 0b5662bc, and is released in TensorFlow versions 1.15.4, 2.0.3, 2.1.2, 2.2.1, or 2.3.1.
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-476 - {"CWE-476":"NULL Pointer Dereference"}
Assigner
GitHub_M CNA under the mitre root
CNA scorecard C 72/100 over 7926 records in the last 180 days details
References
Impacted products
Vendor Product Version
tensorflow tensorflow Affected: < 1.15.4
Affected: >= 2.0.0, < 2.0.3
Affected: >= 2.1.0, < 2.1.2
Affected: >= 2.2.0, < 2.2.1
Affected: >= 2.3.0, < 2.3.1
Create a notification for this product.
Show details on NVD website
To clipboard 

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                  ]
                },
                "vendor_name": "tensorflow"
              }
            ]
          }
        },
        "data_format": "MITRE",
        "data_type": "CVE",
        "data_version": "4.0",
        "description": {
          "description_data": [
            {
              "lang": "eng",
              "value": "In tensorflow-lite before versions 1.15.4, 2.0.3, 2.1.2, 2.2.1 and 2.3.1, a crafted TFLite model can force a node to have as input a tensor backed by a `nullptr` buffer. This can be achieved by changing a buffer index in the flatbuffer serialization to convert a read-only tensor to a read-write one. The runtime assumes that these buffers are written to before a possible read, hence they are initialized with `nullptr`. However, by changing the buffer index for a tensor and implicitly converting that tensor to be a read-write one, as there is nothing in the model that writes to it, we get a null pointer dereference. The issue is patched in commit 0b5662bc, and is released in TensorFlow versions 1.15.4, 2.0.3, 2.1.2, 2.2.1, or 2.3.1."
            }
          ]
        },
        "impact": {
          "cvss": {
            "attackComplexity": "HIGH",
            "attackVector": "NETWORK",
            "availabilityImpact": "HIGH",
            "baseScore": 5.9,
            "baseSeverity": "MEDIUM",
            "confidentialityImpact": "NONE",
            "integrityImpact": "NONE",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H",
            "version": "3.1"
          }
        },
        "problemtype": {
          "problemtype_data": [
            {
              "description": [
                {
                  "lang": "eng",
                  "value": "{\"CWE-476\":\"NULL Pointer Dereference\"}"
                }
              ]
            }
          ]
        },
        "references": {
          "reference_data": [
            {
              "name": "https://github.com/tensorflow/tensorflow/releases/tag/v2.3.1",
              "refsource": "MISC",
              "url": "https://github.com/tensorflow/tensorflow/releases/tag/v2.3.1"
            },
            {
              "name": "https://github.com/tensorflow/tensorflow/security/advisories/GHSA-qh32-6jjc-qprm",
              "refsource": "CONFIRM",
              "url": "https://github.com/tensorflow/tensorflow/security/advisories/GHSA-qh32-6jjc-qprm"
            },
            {
              "name": "https://github.com/tensorflow/tensorflow/commit/0b5662bc2be13a8c8f044d925d87fb6e56247cd8",
              "refsource": "MISC",
              "url": "https://github.com/tensorflow/tensorflow/commit/0b5662bc2be13a8c8f044d925d87fb6e56247cd8"
            },
            {
              "name": "openSUSE-SU-2020:1766",
              "refsource": "SUSE",
              "url": "http://lists.opensuse.org/opensuse-security-announce/2020-10/msg00065.html"
            }
          ]
        },
        "source": {
          "advisory": "GHSA-qh32-6jjc-qprm",
          "discovery": "UNKNOWN"
        }
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
    "assignerShortName": "GitHub_M",
    "cveId": "CVE-2020-15209",
    "datePublished": "2020-09-25T18:45:35.000Z",
    "dateReserved": "2020-06-25T00:00:00.000Z",
    "dateUpdated": "2024-08-04T13:08:22.925Z",
    "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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