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.
6310 vulnerabilities reference this CWE, most recent first.
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 (v2.0.3)
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 (v2.0.3)
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 (v2.0.3)
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 (v2.0.3)
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 (v2.0.3)
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 (v2.0.3)
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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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
EPSS
VEX
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
SSVC
Exploitation: poc
Automatable: no
Technical Impact: partial
CISA Coordinator (v2.0.3)
Assigner
References
7 references
| URL | Tags |
|---|---|
| https://vuldb.com/?id.348303 | vdb-entrytechnical-description |
| https://vuldb.com/?ctiid.348303 | signaturepermissions-required |
| https://vuldb.com/?submit.763756 | third-party-advisory |
| https://github.com/openbabel/openbabel/issues/2848 | issue-tracking |
| https://github.com/openbabel/openbabel/pull/2862 | issue-trackingpatch |
| https://github.com/oneafter/0128/blob/main/ob3/re… | exploit |
| https://github.com/VedantMadane/openbabel/commit/… | patch |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| n/a | Open Babel |
Affected:
3.1.0
Affected: 3.1.1 |
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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
EPSS
VEX
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
SSVC
Exploitation: poc
Automatable: no
Technical Impact: partial
CISA Coordinator (v2.0.3)
Assigner
References
6 references
| URL | Tags |
|---|---|
| https://vuldb.com/?id.348278 | vdb-entrytechnical-description |
| https://vuldb.com/?ctiid.348278 | signaturepermissions-required |
| https://vuldb.com/?submit.761328 | third-party-advisory |
| https://github.com/FascinatedBox/lily/issues/384 | issue-tracking |
| https://github.com/oneafter/0122/blob/main/i384/r… | exploit |
| https://github.com/FascinatedBox/lily/ | product |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| FascinatedBox | lily |
Affected:
2.0
Affected: 2.1 Affected: 2.2 Affected: 2.3 |
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CVE-2026-3389 (GCVE-0-2026-3389)
Vulnerability from cvelistv5 – Published: 2026-03-01 10:02 – Updated: 2026-03-02 13:57
VLAI
EPSS
VEX
Title
Squirrel sqstdrex.cpp sqstd_rex_newnode null pointer dereference
Summary
A vulnerability was determined in Squirrel up to 3.2. This vulnerability affects the function sqstd_rex_newnode in the library sqstdlib/sqstdrex.cpp. Executing a manipulation can lead to null pointer dereference. The attack can only be executed locally. The exploit has been publicly disclosed and may be utilized. The project was informed of the problem early through an issue report but has not responded yet.
Severity
SSVC
Exploitation: poc
Automatable: no
Technical Impact: partial
CISA Coordinator (v2.0.3)
Assigner
References
5 references
| URL | Tags |
|---|---|
| https://vuldb.com/?id.348275 | vdb-entrytechnical-description |
| https://vuldb.com/?ctiid.348275 | signaturepermissions-required |
| https://vuldb.com/?submit.761315 | third-party-advisory |
| https://github.com/albertodemichelis/squirrel/iss… | issue-tracking |
| https://github.com/oneafter/0122/blob/main/i314/repro | exploit |
Impacted products
Credits
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CVE-2026-3387 (GCVE-0-2026-3387)
Vulnerability from cvelistv5 – Published: 2026-03-01 09:32 – Updated: 2026-03-02 19:35
VLAI
EPSS
VEX
Title
wren-lang wren wren_compiler.c getByteCountForArguments null pointer dereference
Summary
A vulnerability has been found in wren-lang wren up to 0.4.0. Affected by this issue is the function getByteCountForArguments of the file src/vm/wren_compiler.c. Such manipulation leads to null pointer dereference. Local access is required to approach this attack. The exploit has been disclosed to the public and may be used. The project was informed of the problem early through an issue report but has not responded yet.
Severity
SSVC
Exploitation: poc
Automatable: no
Technical Impact: partial
CISA Coordinator (v2.0.3)
Assigner
References
6 references
| URL | Tags |
|---|---|
| https://vuldb.com/?id.348273 | vdb-entrytechnical-description |
| https://vuldb.com/?ctiid.348273 | signaturepermissions-required |
| https://vuldb.com/?submit.761312 | third-party-advisory |
| https://github.com/wren-lang/wren/issues/1220 | issue-tracking |
| https://github.com/oneafter/0122/blob/main/i1220/repro | exploit |
| https://github.com/wren-lang/wren/ | product |
Impacted products
Credits
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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.