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.

6305 vulnerabilities reference this CWE, most recent first.

CVE-2023-51368 (GCVE-0-2023-51368)

Vulnerability from cvelistv5 – Published: 2024-09-06 16:26 – Updated: 2024-09-06 17:34
VLAI
Title
QTS, QuTS hero
Summary
A NULL pointer dereference vulnerability has been reported to affect several QNAP operating system versions. If exploited, the vulnerability could allow users to launch a denial-of-service (DoS) attack via a network. We have already fixed the vulnerability in the following versions: QTS 5.1.6.2722 build 20240402 and later QuTS hero h5.1.6.2734 build 20240414 and later
Severity
5.4 (Medium)
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:N/I:L/A:L
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
Assigner
References
Impacted products
Vendor Product Version
QNAP Systems Inc. QTS Affected: 5.1.x , < 5.1.6.2722 build 20240402 (custom)
Create a notification for this product.
QNAP Systems Inc. QuTS hero Affected: h5.1.x , < h5.1.6.2734 build 20240414 (custom)
Create a notification for this product.
Credits
chumen77
Show details on NVD website
To clipboard 

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CVE-2023-49275 (GCVE-0-2023-49275)

Vulnerability from cvelistv5 – Published: 2024-04-19 14:24 – Updated: 2024-08-02 21:53
VLAI
Title
Wazuh vulnerable to NULL Pointer Dereference in wazuh-analysisd
Summary
Wazuh is a free and open source platform used for threat prevention, detection, and response. A NULL pointer dereference was detected during fuzzing of the analysis engine, allowing malicious clients to DoS the analysis engine. The bug occurs when `analysisd` receives a syscollector message with the `hotfix` `msg_type` but lacking a `timestamp`. It uses `cJSON_GetObjectItem()` to get the `timestamp` object item and dereferences it without checking for a `NULL` value. A malicious client can DoS the analysis engine. This vulnerability is fixed in 4.7.1.
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: poc Automatable: no Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
  • CWE-476 - NULL Pointer Dereference
Assigner
References
Impacted products
Vendor Product Version
wazuh wazuh Affected: >= 3.2.0, < 4.7.1
Create a notification for this product.
wazuh wazuh Affected: -
    cpe:2.3:a:wazuh:wazuh:-:*:*:*:*:*:*:*
 Create a notification for this product.
Show details on NVD website
To clipboard 

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CVE-2023-49083 (GCVE-0-2023-49083)

Vulnerability from cvelistv5 – Published: 2023-11-29 18:50 – Updated: 2025-12-18 15:32
VLAI
Title
cryptography vulnerable to NULL-dereference when loading PKCS7 certificates
Summary
cryptography is a package designed to expose cryptographic primitives and recipes to Python developers. Calling `load_pem_pkcs7_certificates` or `load_der_pkcs7_certificates` could lead to a NULL-pointer dereference and segfault. Exploitation of this vulnerability poses a serious risk of Denial of Service (DoS) for any application attempting to deserialize a PKCS7 blob/certificate. The consequences extend to potential disruptions in system availability and stability. This vulnerability has been patched in version 41.0.6.
Severity
5.9 (Medium)
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
SSVC
Exploitation: poc Automatable: no Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
  • CWE-476 - NULL Pointer Dereference
Assigner
References
Impacted products
Vendor Product Version
pyca cryptography Affected: >= 3.1, < 41.0.6
Create a notification for this product.
Show details on NVD website
To clipboard 

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CVE-2023-48697 (GCVE-0-2023-48697)

Vulnerability from cvelistv5 – Published: 2023-12-05 00:25 – Updated: 2024-08-28 17:30
VLAI
Title
Azure RTOS USBX Remote Code Execution Vulnerability
Summary
Azure RTOS USBX is a USB host, device, and on-the-go (OTG) embedded stack, that is fully integrated with Azure RTOS ThreadX. An attacker can cause remote code execution due to memory buffer and pointer vulnerabilities in Azure RTOS USBX. The affected components include functions/processes in pictbridge and host class, related to PIMA, storage, CDC ACM, ECM, audio, hub in RTOS v6.2.1 and below. The fixes have been included in USBX release 6.3.0. Users are advised to upgrade. There are no known workarounds for this vulnerability.
Severity
6.4 (Medium)
CVSS:3.1/AV:P/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
SSVC
Exploitation: none Automatable: no Technical Impact: total
CISA Coordinator (v2.0.3)
CWE
Assigner
References
Impacted products
Vendor Product Version
azure-rtos usbx Affected: < 6.3.0
Create a notification for this product.
Show details on NVD website
To clipboard 

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CVE-2023-48364 (GCVE-0-2023-48364)

Vulnerability from cvelistv5 – Published: 2024-02-13 08:59 – Updated: 2024-09-10 09:36
VLAI
Summary
A vulnerability has been identified in OpenPCS 7 V9.1 (All versions < V9.1 SP2 UC05), SIMATIC BATCH V9.1 (All versions < V9.1 SP2 UC05), SIMATIC PCS 7 V9.1 (All versions < V9.1 SP2 UC05), SIMATIC Route Control V9.1 (All versions < V9.1 SP2 UC05), SIMATIC WinCC Runtime Professional V18 (All versions < V18 Update 4), SIMATIC WinCC Runtime Professional V19 (All versions < V19 Update 2), SIMATIC WinCC V7.4 (All versions), SIMATIC WinCC V7.5 (All versions < V7.5 SP2 Update 15), SIMATIC WinCC V8.0 (All versions < V8.0 Update 4). The implementation of the RPC (Remote Procedure call) communication protocol in the affected products do not properly handle certain malformed RPC messages. An attacker could use this vulnerability to cause a denial of service condition in the RPC server.
Severity
6.5 (Medium)
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:P/RL:O/RC:C
7.1 (High)
CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
  • CWE-476 - NULL Pointer Dereference
Assigner
References
Impacted products
Show details on NVD website
To clipboard 

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CVE-2023-48363 (GCVE-0-2023-48363)

Vulnerability from cvelistv5 – Published: 2024-02-13 08:59 – Updated: 2024-09-10 09:36
VLAI
Summary
A vulnerability has been identified in OpenPCS 7 V9.1 (All versions < V9.1 SP2 UC05), SIMATIC BATCH V9.1 (All versions < V9.1 SP2 UC05), SIMATIC PCS 7 V9.1 (All versions < V9.1 SP2 UC05), SIMATIC Route Control V9.1 (All versions < V9.1 SP2 UC05), SIMATIC WinCC Runtime Professional V18 (All versions < V18 Update 4), SIMATIC WinCC Runtime Professional V19 (All versions < V19 Update 2), SIMATIC WinCC V7.4 (All versions), SIMATIC WinCC V7.5 (All versions < V7.5 SP2 Update 15), SIMATIC WinCC V8.0 (All versions < V8.0 Update 4). The implementation of the RPC (Remote Procedure call) communication protocol in the affected products do not properly handle certain unorganized RPC messages. An attacker could use this vulnerability to cause a denial of service condition in the RPC server.
Severity
6.5 (Medium)
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:P/RL:O/RC:C
7.1 (High)
CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
  • CWE-476 - NULL Pointer Dereference
Assigner
References
Impacted products
Show details on NVD website
To clipboard 

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CVE-2023-47466 (GCVE-0-2023-47466)

Vulnerability from cvelistv5 – Published: 2025-05-22 00:00 – Updated: 2026-01-24 21:03
VLAI
Summary
TagLib before 2.0 allows a segmentation violation and application crash during tag writing via a crafted WAV file in which an id3 chunk is the only valid chunk.
Severity
2.9 (Low)
CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L
SSVC
Exploitation: poc Automatable: no Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
  • CWE-476 - NULL Pointer Dereference
Assigner
References
Impacted products
Vendor Product Version
TagLib TagLib Affected: 0 , < 2.0 (custom)
Create a notification for this product.
Show details on NVD website
To clipboard 

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CVE-2023-47076 (GCVE-0-2023-47076)

Vulnerability from cvelistv5 – Published: 2023-12-13 09:38 – Updated: 2024-11-25 21:05
VLAI
Title
Adobe InDesign CC 2023 Memory Corruption Vulnerability IV.
Summary
Adobe InDesign versions 19.0 (and earlier) and 17.4.2 (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 (v2.0.3)
CWE
  • CWE-476 - NULL Pointer Dereference (CWE-476)
Assigner
References
Impacted products
Vendor Product Version
Adobe InDesign Desktop Affected: 0 , ≤ 19.0 (semver)
Create a notification for this product.
Date Public
2023-12-12 17:00
Show details on NVD website
To clipboard 

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CVE-2023-46728 (GCVE-0-2023-46728)

Vulnerability from cvelistv5 – Published: 2023-11-06 17:13 – Updated: 2025-11-03 18:08
VLAI
Title
SQUID-2021:8 Denial of Service in Gopher gateway
Summary
Squid is a caching proxy for the Web supporting HTTP, HTTPS, FTP, and more. Due to a NULL pointer dereference bug Squid is vulnerable to a Denial of Service attack against Squid's Gopher gateway. The gopher protocol is always available and enabled in Squid prior to Squid 6.0.1. Responses triggering this bug are possible to be received from any gopher server, even those without malicious intent. Gopher support has been removed in Squid version 6.0.1. Users are advised to upgrade. Users unable to upgrade should reject all gopher URL requests.
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 (v2.0.3)
CWE
  • CWE-476 - NULL Pointer Dereference
Assigner
References
Impacted products
Vendor Product Version
squid-cache squid Affected: < 6.0.1
Create a notification for this product.
Show details on NVD website
To clipboard 

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CVE-2023-45680 (GCVE-0-2023-45680)

Vulnerability from cvelistv5 – Published: 2023-10-20 23:26 – Updated: 2024-09-11 20:22
VLAI
Title
Null pointer dereference in vorbis_deinit in stb_vorbis
Summary
stb_vorbis is a single file MIT licensed library for processing ogg vorbis files. A crafted file may trigger memory allocation failure in `start_decoder`. In that case the function returns early, the `f->comment_list` is set to `NULL`, but `f->comment_list_length` is not reset. Later in `vorbis_deinit` it tries to dereference the `NULL` pointer. This issue may lead to denial of service.
Severity
5.3 (Medium)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
SSVC
Exploitation: poc Automatable: yes Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
  • CWE-476 - NULL Pointer Dereference
Assigner
References
Impacted products
Vendor Product Version
nothings stb Affected: <= 1.22
Create a notification for this product.
Show details on NVD website
To clipboard 

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          "name": "https://github.com/nothings/stb/blob/5736b15f7ea0ffb08dd38af21067c314d6a3aae9/stb_vorbis.c#L4208-L4215",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/nothings/stb/blob/5736b15f7ea0ffb08dd38af21067c314d6a3aae9/stb_vorbis.c#L4208-L4215"
        }
      ],
      "source": {
        "advisory": "GHSA-6w3h-6hpf-r29c",
        "discovery": "UNKNOWN"
      },
      "title": "Null pointer dereference in vorbis_deinit in stb_vorbis"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
    "assignerShortName": "GitHub_M",
    "cveId": "CVE-2023-45680",
    "datePublished": "2023-10-20T23:26:54.394Z",
    "dateReserved": "2023-10-10T14:36:40.862Z",
    "dateUpdated": "2024-09-11T20:22:52.057Z",
    "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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