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.

1661 vulnerabilities reference this CWE, most recent first.

CVE-2026-6525 (GCVE-0-2026-6525)

Vulnerability from cvelistv5 – Published: 2026-05-02 11:33 – Updated: 2026-05-04 14:59
VLAI
Title
NULL Pointer Dereference in Wireshark
Summary
IEEE 802.11 protocol dissector crash in Wireshark 4.6.0 to 4.6.4
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: poc Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-05-04 14:58 UTC
CWE
  • CWE-476 - NULL Pointer Dereference
Assigner
GitLab CNA
References
Impacted products
Vendor Product Version
Wireshark Foundation Wireshark Affected: 4.6.0 , < 4.6.5 (semver)
Create a notification for this product.
Credits
Nils Bagge
Show details on NVD website
To clipboard 

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CVE-2026-5745 (GCVE-0-2026-5745)

Vulnerability from cvelistv5 – Published: 2026-04-07 14:57 – Updated: 2026-11-06 07:52
VLAI
Title
Libarchive: a null pointer dereference vulnerability exists in the acl parser of libarchive
Summary
A flaw was found in libarchive. A NULL pointer dereference vulnerability exists in the ACL parsing logic, specifically within the archive_acl_from_text_nl() function. When processing a malformed ACL string (such as a bare "d" or "default" tag without subsequent fields), the function fails to perform adequate validation before advancing the pointer. An attacker can exploit this by providing a maliciously crafted archive, causing an application utilizing the libarchive API (such as bsdtar) to crash, resulting in a Denial of Service (DoS).
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 2026-04-07 16:31 UTC
CWE
  • CWE-476 - NULL Pointer Dereference
Assigner
redhat CNA
References
URL Tags
https://access.redhat.com/errata/RHSA-2026:8944 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/security/cve/CVE-2026-5745 vdb-entryx_refsource_REDHAT
https://bugzilla.redhat.com/show_bug.cgi?id=2455921 issue-trackingx_refsource_REDHAT
Impacted products
Date Public
2026-04-07 00:00
Show details on NVD website
To clipboard 

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CVE-2026-5590 (GCVE-0-2026-5590)

Vulnerability from cvelistv5 – Published: 2026-04-05 03:34 – Updated: 2026-10-15 22:10
VLAI
Title
net: ip/tcp: Null pointer dereference can be triggered by a race condition
Summary
A race condition during TCP connection teardown can cause tcp_recv() to operate on a connection that has already been released. If tcp_conn_search() returns NULL while processing a SYN packet, a NULL pointer derived from stale context data is passed to tcp_backlog_is_full() and dereferenced without validation, leading to a crash.
Severity
6.4 (Medium)
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:H
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-04-06 14:21 UTC
CWE
  • CWE-476 - NULL Pointer Dereference
Assigner
zephyr CNA
References
Impacted products
Vendor Product Version
zephyrproject-rtos Zephyr Affected: * , < 4.3.1 (git)
Create a notification for this product.
Show details on NVD website
To clipboard 

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CVE-2026-4751 (GCVE-0-2026-4751)

Vulnerability from cvelistv5 – Published: 2026-03-24 05:37 – Updated: 2026-03-24 14:29
VLAI
Title
NULL Pointer Dereference in tmate-io tmate
Summary
NULL Pointer Dereference vulnerability in tmate-io tmate.This issue affects tmate: before 2.4.0.
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: none Automatable: yes Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-03-24 14:28 UTC
CWE
  • CWE-476 - NULL Pointer Dereference
Assigner
References
Impacted products
Vendor Product Version
tmate-io tmate Affected: 0 , < 2.4.0 (git)
Create a notification for this product.
Credits
TITAN Team (titancaproject@gmail.com)
Show details on NVD website
To clipboard 

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CVE-2026-4743 (GCVE-0-2026-4743)

Vulnerability from cvelistv5 – Published: 2026-03-24 03:25 – Updated: 2026-03-24 14:33
VLAI
Title
Null-Pointer Dereference Vulnerability in taurusxin/ncmdump
Summary
NULL Pointer Dereference vulnerability in taurusxin ncmdump (‎src/utils‎ modules). This vulnerability is associated with program files cJSON.Cpp‎. This issue affects ncmdump: before 1.4.0.
Severity
5.2 (Medium)
CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:P/S:N/AU:N/R:U/V:D/RE:L/U:Green
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-03-24 14:33 UTC
CWE
  • CWE-476 - NULL Pointer Dereference
Assigner
References
Impacted products
Vendor Product Version
taurusxin ncmdump Affected: 0 , < 1.4.0 (git)
Create a notification for this product.
Credits
TITAN Team (titancaproject@gmail.com)
Show details on NVD website
To clipboard 

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CVE-2026-4652 (GCVE-0-2026-4652)

Vulnerability from cvelistv5 – Published: 2026-03-26 06:15 – Updated: 2026-03-26 13:31
VLAI
Title
Remote denial of service via null pointer dereference
Summary
On a system exposing an NVMe/TCP target, a remote client can trigger a kernel panic by sending a CONNECT command for an I/O queue with a bogus or stale CNTLID. An attacker with network access to the NVMe/TCP target can trigger an unauthenticated Denial of Service condition on the affected machine.
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 2026-03-26 13:31 UTC
CWE
  • CWE-476 - NULL Pointer Dereference
Assigner
freebsd CNA
References
Impacted products
Vendor Product Version
FreeBSD FreeBSD Affected: 15.0-RELEASE , < p5 (release)
Create a notification for this product.
Date Public
2026-03-26 05:00
Credits
Nikolay Denev <ndenev@gmail.com>
Show details on NVD website
To clipboard 

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CVE-2026-3776 (GCVE-0-2026-3776)

Vulnerability from cvelistv5 – Published: 2026-04-01 01:40 – Updated: 2026-04-02 02:12
VLAI
Title
Null pointer dereference in Foxit PDF Editor/Reader when accessing stamp annotation
Summary
The application does not validate the presence of required appearance (AP) data before accessing stamp annotation resources. When a PDF contains a stamp annotation missing its AP entry, the code continues to dereference the associated object without a prior null or validity check, which allows a crafted document to trigger a null pointer dereference and crash the application, resulting in denial of service.
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 2026-04-01 14:16 UTC
CWE
  • CWE-476 - NULL pointer dereference
Assigner
Foxit CNA
References
Impacted products
Vendor Product Version
Foxit Software Inc. Foxit PDF Editor Affected: Versions 2025.3 and earlier
Affected: Versions 14.0.2 and earlier
Affected: Versions 13.2.2 and earlier
Create a notification for this product.
Foxit Software Inc. Foxit PDF Reader Affected: Versions 2025.3 and earlier
Create a notification for this product.
Credits
Suyue Guo from UCSB Seclab
Show details on NVD website
To clipboard 

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CVE-2026-3665 (GCVE-0-2026-3665)

Vulnerability from cvelistv5 – Published: 2026-03-07 15:32 – Updated: 2026-03-11 16:29
VLAI
Title
xlnt-community xlnt XLSX File xlsx_consumer.cpp read_office_document null pointer dereference
Summary
A vulnerability was identified in xlnt-community xlnt up to 1.6.1. The affected element is the function xlnt::detail::xlsx_consumer::read_office_document of the file source/detail/serialization/xlsx_consumer.cpp of the component XLSX File Parser. The manipulation leads to null pointer dereference. The attack must be carried out locally. The exploit is publicly available and might be used.
Severity
4.8 (Medium)
CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:P
3.3 (Low)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L/E:P/RL:X/RC:R
3.3 (Low)
CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L/E:P/RL:X/RC:R
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-03-11 16:14 UTC
CWE
Assigner
VulDB CNA
References
Impacted products
Vendor Product Version
xlnt-community xlnt Affected: 1.6.0
Affected: 1.6.1
Create a notification for this product.
Credits
Oneafter (VulDB User)
Show details on NVD website
To clipboard 

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CVE-2026-3408 (GCVE-0-2026-3408)

Vulnerability from cvelistv5 – Published: 2026-03-02 03:32 – Updated: 2026-03-02 14:39 X_Open Source
VLAI
Title
Open Babel CDXML File atom.cpp GetExplicitValence null pointer dereference
Summary
A vulnerability was identified in Open Babel up to 3.1.1. This impacts the function OBAtom::GetExplicitValence of the file isrc/atom.cpp of the component CDXML File Handler. Such manipulation leads to null pointer dereference. The attack can be launched remotely. The exploit is publicly available and might be used. The name of the patch is e23a224b8fd9d7c2a7cde9ef4ec6afb4c05aa08a. It is best practice to apply a patch to resolve this issue.
Severity
5.3 (Medium)
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:P
4.3 (Medium)
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L/E:P/RL:O/RC:C
4.3 (Medium)
CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L/E:P/RL:O/RC:C
SSVC
Exploitation: poc Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-03-02 14:38 UTC
CWE
Assigner
VulDB CNA
References
Impacted products
Vendor Product Version
n/a Open Babel Affected: 3.1.0
Affected: 3.1.1
Credits
Oneafter (VulDB User)
Show details on NVD website
To clipboard 

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CVE-2026-3392 (GCVE-0-2026-3392)

Vulnerability from cvelistv5 – Published: 2026-03-01 11:32 – Updated: 2026-03-02 18:20
VLAI
Title
FascinatedBox lily lily_emitter.c eval_tree null pointer dereference
Summary
A weakness has been identified in FascinatedBox lily up to 2.3. The affected element is the function eval_tree of the file src/lily_emitter.c. This manipulation causes null pointer dereference. The attack is restricted to local execution. The exploit has been made available to the public and could be used for attacks. The project was informed of the problem early through an issue report but has not responded yet.
Severity
4.8 (Medium)
CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:P
3.3 (Low)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L/E:P/RL:X/RC:R
3.3 (Low)
CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L/E:P/RL:X/RC:R
SSVC
Exploitation: poc Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-03-02 18:19 UTC
CWE
Assigner
VulDB CNA
References
Impacted products
Vendor Product Version
FascinatedBox lily Affected: 2.0
Affected: 2.1
Affected: 2.2
Affected: 2.3
Create a notification for this product.
Credits
Oneafter (VulDB User)
Show details on NVD website
To clipboard 

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          "value": "A weakness has been identified in FascinatedBox lily up to 2.3. The affected element is the function eval_tree of the file src/lily_emitter.c. This manipulation causes null pointer dereference. The attack is restricted to local execution. The exploit has been made available to the public and could be used for attacks. The project was informed of the problem early through an issue report but has not responded yet."
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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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