Common Weakness Enumeration
CWE-476
AllowedNULL Pointer Dereference
Abstraction: Base · Status: Stable
The product dereferences a pointer that it expects to be valid but is NULL.
6769 vulnerabilities reference this CWE, most recent first.
CVE-2026-6666 (GCVE-0-2026-6666)
Vulnerability from cvelistv5 – Published: 2026-05-09 00:43 – Updated: 2026-05-11 14:44
VLAI
EPSS
VEX
Title
PgBouncer crash in kill_pool_logins_server_error
Summary
A possible null pointer reference in PgBouncer before 1.25.2 could lead to a crash, if a server sends an error response without SQLSTATE field.
Severity
5.9 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-05-11 14:44 UTC
CWE
- CWE-476 - NULL Pointer Dereference
Assigner
References
1 reference
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CVE-2026-6526 (GCVE-0-2026-6526)
Vulnerability from cvelistv5 – Published: 2026-04-30 05:34 – Updated: 2026-04-30 15:19
VLAI
EPSS
VEX
Title
NULL Pointer Dereference in Wireshark
Summary
RTSP protocol dissector crash in Wireshark 4.6.0 to 4.6.4
Severity
5.5 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-04-30 15:02 UTC
CWE
- CWE-476 - NULL Pointer Dereference
Assigner
References
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Wireshark Foundation | Wireshark |
Affected:
4.6.0 , < 4.6.5
(semver)
|
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CVE-2026-6525 (GCVE-0-2026-6525)
Vulnerability from cvelistv5 – Published: 2026-05-02 11:33 – Updated: 2026-05-04 14:59
VLAI
EPSS
VEX
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)
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
References
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Wireshark Foundation | Wireshark |
Affected:
4.6.0 , < 4.6.5
(semver)
|
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CVE-2026-5745 (GCVE-0-2026-5745)
Vulnerability from cvelistv5 – Published: 2026-04-07 14:57 – Updated: 2026-09-01 11:44
VLAI
EPSS
VEX
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)
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
References
3 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
7 products
| Vendor | Product | Version | |
|---|---|---|---|
| Red Hat | Red Hat Hardened Images |
Unaffected:
3.8.7-1.hum1 , < *
(rpm)
cpe:/a:redhat:hummingbird:1 |
|
| Red Hat | Red Hat Enterprise Linux 10 |
cpe:/o:redhat:enterprise_linux:10
|
|
| Red Hat | Red Hat Enterprise Linux 6 |
cpe:/o:redhat:enterprise_linux:6
|
|
| Red Hat | Red Hat Enterprise Linux 7 |
cpe:/o:redhat:enterprise_linux:7
|
|
| Red Hat | Red Hat Enterprise Linux 8 |
cpe:/o:redhat:enterprise_linux:8
|
|
| Red Hat | Red Hat Enterprise Linux 9 |
cpe:/o:redhat:enterprise_linux:9
|
|
| Red Hat | Red Hat OpenShift Container Platform 4 |
cpe:/a:redhat:openshift:4
|
Date Public
2026-04-07 00:00
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CVE-2026-5590 (GCVE-0-2026-5590)
Vulnerability from cvelistv5 – Published: 2026-04-05 03:34 – Updated: 2026-04-06 14:22
VLAI
EPSS
VEX
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)
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
References
1 reference
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| zephyrproject-rtos | Zephyr |
Affected:
* , ≤ 4.3
(git)
|
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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
EPSS
VEX
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)
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
1 reference
| URL | Tags |
|---|---|
| https://github.com/tmate-io/tmate/pull/328 | patch |
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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
EPSS
VEX
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
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
1 reference
| URL | Tags |
|---|---|
| https://github.com/taurusxin/ncmdump/pull/52 | patch |
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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
EPSS
VEX
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)
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
References
1 reference
| URL | Tags |
|---|---|
| https://security.freebsd.org/advisories/FreeBSD-S… | vendor-advisory |
Impacted products
Date Public
2026-03-26 05:00
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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
EPSS
VEX
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)
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
References
1 reference
Impacted products
2 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 |
|
| Foxit Software Inc. | Foxit PDF Reader |
Affected:
Versions 2025.3 and earlier
|
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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
EPSS
VEX
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
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-03-11 16:14 UTC
Assigner
References
6 references
| URL | Tags |
|---|---|
| https://vuldb.com/?id.349554 | vdb-entrytechnical-description |
| https://vuldb.com/?ctiid.349554 | signaturepermissions-required |
| https://vuldb.com/?submit.764647 | third-party-advisory |
| https://github.com/xlnt-community/xlnt/issues/140 | issue-tracking |
| https://github.com/oneafter/0128/blob/main/xl4/repro | exploit |
| https://github.com/xlnt-community/xlnt/ | product |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| xlnt-community | xlnt |
Affected:
1.6.0
Affected: 1.6.1 |
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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.