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-2025-46400 (GCVE-0-2025-46400)
Vulnerability from cvelistv5 – Published: 2025-04-23 20:55 – Updated: 2026-06-30 03:06
VLAI
EPSS
VEX
Title
Xfig: fig2dev segmentation fault in read_arcobject
Summary
In xfig diagramming tool, a segmentation fault while running fig2dev allows an attacker to availability via local input manipulation via read_arcobject function.
Severity
5.5 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2025-05-23 18:31 UTC
CWE
- CWE-476 - NULL Pointer Dereference
Assigner
References
4 references
| URL | Tags |
|---|---|
| https://access.redhat.com/security/cve/CVE-2025-46400 | vdb-entryx_refsource_REDHAT |
| https://bugzilla.redhat.com/show_bug.cgi?id=2362054 | issue-trackingx_refsource_REDHAT |
| https://sourceforge.net/p/mcj/tickets/187/ | |
| https://lists.debian.org/debian-lts-announce/2025… |
Impacted products
5 products
| Vendor | Product | Version | |
|---|---|---|---|
|
Affected:
0 , ≤ 3.2.9a
(semver)
|
|||
| 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
|
Date Public
2025-04-23 20:55
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CVE-2025-46399 (GCVE-0-2025-46399)
Vulnerability from cvelistv5 – Published: 2025-04-23 20:55 – Updated: 2026-06-30 03:06
VLAI
EPSS
VEX
Title
Xfig: transfig: fig2dev segmentation fault vulnerability
Summary
A flaw was found in fig2dev. This vulnerability allows availability via local input manipulation via genge_itp_spline function.
Severity
5.5 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2025-05-23 18:30 UTC
CWE
- CWE-476 - NULL Pointer Dereference
Assigner
References
4 references
| URL | Tags |
|---|---|
| https://access.redhat.com/security/cve/CVE-2025-46399 | vdb-entryx_refsource_REDHAT |
| https://bugzilla.redhat.com/show_bug.cgi?id=2362053 | issue-trackingx_refsource_REDHAT |
| https://sourceforge.net/p/mcj/tickets/190/ | |
| https://lists.debian.org/debian-lts-announce/2025… |
Impacted products
5 products
| Vendor | Product | Version | |
|---|---|---|---|
|
Affected:
0 , ≤ 3.2.9a
(semver)
|
|||
| 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
|
Date Public
2025-04-23 20:55
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CVE-2025-45525 (GCVE-0-2025-45525)
Vulnerability from cvelistv5 – Published: 2025-06-17 00:00 – Updated: 2025-08-26 18:51 Disputed
VLAI
EPSS
VEX
Summary
A NULL pointer dereference vulnerability has been identified in the JavaScript library microlight version 0.0.7, a lightweight syntax highlighting library. When processing elements with non-standard CSS color values, the library fails to validate the result of a regular expression match before accessing its properties, leading to an uncaught TypeError and potential application crash. NOTE: this is disputed by multiple parties because there is no common scenario in which an adversary can insert those non-standard values.
Severity
SSVC
Exploitation: poc
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2025-06-18 13:20 UTC
CWE
- CWE-476 - NULL Pointer Dereference
Assigner
References
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| asvd | microlight |
Affected:
0 , ≤ 0.0.7
(semver)
|
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CVE-2025-44013 (GCVE-0-2025-44013)
Vulnerability from cvelistv5 – Published: 2026-01-02 14:52 – Updated: 2026-01-02 19:26
VLAI
EPSS
VEX
Title
QTS, QuTS hero
Summary
A NULL pointer dereference vulnerability has been reported to affect several QNAP operating system versions. If a remote attacker gains a user account, they can then exploit the vulnerability to launch a denial-of-service (DoS) attack.
We have already fixed the vulnerability in the following versions:
QTS 5.2.6.3195 build 20250715 and later
QuTS hero h5.2.6.3195 build 20250715 and later
Severity
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-01-02 19:26 UTC
CWE
Assigner
References
1 reference
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| QNAP Systems Inc. | QTS |
Affected:
5.2.x , < 5.2.6.3195 build 20250715
(custom)
cpe:2.3:a:qnap_systems_inc.:qts:*:*:*:*:*:*:*:* |
|
| QNAP Systems Inc. | QuTS hero |
Affected:
h5.2.x , < h5.2.6.3195 build 20250715
(custom)
cpe:2.3:a:qnap_systems_inc.:quts_hero:*:*:*:*:*:*:*:* |
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CVE-2025-44011 (GCVE-0-2025-44011)
Vulnerability from cvelistv5 – Published: 2025-10-03 18:09 – Updated: 2025-10-03 18:49
VLAI
EPSS
VEX
Title
Qsync Central
Summary
A NULL pointer dereference vulnerability has been reported to affect Qsync Central. If a remote attacker gains a user account, they can then exploit the vulnerability to launch a denial-of-service (DoS) attack.
We have already fixed the vulnerability in the following version:
Qsync Central 5.0.0.1 ( 2025/07/09 ) and later
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2025-10-03 18:49 UTC
CWE
Assigner
References
1 reference
Impacted products
1 product
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|---|---|---|---|
| QNAP Systems Inc. | Qsync Central |
Affected:
4.x , < 5.0.0.1 ( 2025/07/09 )
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CVE-2025-44010 (GCVE-0-2025-44010)
Vulnerability from cvelistv5 – Published: 2025-10-03 18:09 – Updated: 2025-10-03 18:43
VLAI
EPSS
VEX
Title
Qsync Central
Summary
A NULL pointer dereference vulnerability has been reported to affect Qsync Central. If a remote attacker gains a user account, they can then exploit the vulnerability to launch a denial-of-service (DoS) attack.
We have already fixed the vulnerability in the following version:
Qsync Central 5.0.0.1 ( 2025/07/09 ) and later
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2025-10-03 18:42 UTC
CWE
Assigner
References
1 reference
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| QNAP Systems Inc. | Qsync Central |
Affected:
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CVE-2025-44009 (GCVE-0-2025-44009)
Vulnerability from cvelistv5 – Published: 2025-10-03 18:09 – Updated: 2025-10-03 18:42
VLAI
EPSS
VEX
Title
Qsync Central
Summary
A NULL pointer dereference vulnerability has been reported to affect Qsync Central. If a remote attacker gains a user account, they can then exploit the vulnerability to launch a denial-of-service (DoS) attack.
We have already fixed the vulnerability in the following version:
Qsync Central 5.0.0.1 ( 2025/07/09 ) and later
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2025-10-03 18:41 UTC
CWE
Assigner
References
1 reference
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| QNAP Systems Inc. | Qsync Central |
Affected:
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CVE-2025-44008 (GCVE-0-2025-44008)
Vulnerability from cvelistv5 – Published: 2025-10-03 18:09 – Updated: 2025-10-03 18:41
VLAI
EPSS
VEX
Title
Qsync Central
Summary
A NULL pointer dereference vulnerability has been reported to affect Qsync Central. If a remote attacker gains a user account, they can then exploit the vulnerability to launch a denial-of-service (DoS) attack.
We have already fixed the vulnerability in the following version:
Qsync Central 5.0.0.1 ( 2025/07/09 ) and later
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2025-10-03 18:41 UTC
CWE
Assigner
References
1 reference
Impacted products
1 product
| Vendor | Product | Version | |
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| QNAP Systems Inc. | Qsync Central |
Affected:
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CVE-2025-43967 (GCVE-0-2025-43967)
Vulnerability from cvelistv5 – Published: 2025-04-20 00:00 – Updated: 2025-04-21 02:10
VLAI
EPSS
VEX
Summary
libheif before 1.19.6 has a NULL pointer dereference in ImageItem_Grid::get_decoder in image-items/grid.cc because a grid image can reference a nonexistent image item.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2025-04-21 02:10 UTC
CWE
- CWE-476 - NULL Pointer Dereference
Assigner
References
Impacted products
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CVE-2025-43966 (GCVE-0-2025-43966)
Vulnerability from cvelistv5 – Published: 2025-04-20 00:00 – Updated: 2025-04-21 02:11
VLAI
EPSS
VEX
Summary
libheif before 1.19.6 has a NULL pointer dereference in ImageItem_iden in image-items/iden.cc.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2025-04-21 02:11 UTC
CWE
- CWE-476 - NULL Pointer Dereference
Assigner
References
Impacted products
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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.