CWE-476
NULL Pointer Dereference
The product dereferences a pointer that it expects to be valid but is NULL.
CVE-2025-64169 (GCVE-0-2025-64169)
Vulnerability from cvelistv5 – Published: 2025-11-21 18:39 – Updated: 2025-11-21 19:05
VLAI
Title
Wazuh NULL pointer dereference in fim_alert line 666
Summary
Wazuh is a free and open source platform used for threat prevention, detection, and response. From version 3.7.0 to before 4.12.0, fim_alert() implementation does not check whether oldsum->md5 is NULL or not before dereferencing it. A compromised agent can cause a crash of analysisd by sending a specially crafted message to the wazuh manager. This issue has been patched in version 4.12.0.
Severity
SSVC
Exploitation: poc
Automatable: no
Technical Impact: partial
CISA Coordinator (v2.0.3)
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://github.com/wazuh/wazuh/security/advisorie… | x_refsource_CONFIRM |
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CVE-2025-64335 (GCVE-0-2025-64335)
Vulnerability from cvelistv5 – Published: 2025-11-26 22:39 – Updated: 2025-12-12 15:13
VLAI
Title
Suricata is vulnerable to a null deref when used with base64_data
Summary
Suricata is a network IDS, IPS and NSM engine developed by the OISF (Open Information Security Foundation) and the Suricata community. In versions from 8.0.0 to before 8.0.2, a NULL dereference can occur when the entropy keyword is used in conjunction with base64_data. This issue has been patched in version 8.0.2. A workaround involves disabling rules that use entropy in conjunction with base64_data.
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
4 references
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CVE-2025-64527 (GCVE-0-2025-64527)
Vulnerability from cvelistv5 – Published: 2025-12-03 18:04 – Updated: 2025-12-03 20:18
VLAI
Title
Envoy crashes when JWT authentication is configured with the remote JWKS fetching
Summary
Envoy is a high-performance edge/middle/service proxy. In 1.33.12, 1.34.10, 1.35.6, 1.36.2, and earlier, Envoy crashes when JWT authentication is configured with the remote JWKS fetching, allow_missing_or_failed is enabled, multiple JWT tokens are present in the request headers and the JWKS fetch fails. This is caused by a re-entry bug in the JwksFetcherImpl. When the first token's JWKS fetch fails, onJwksError() callback triggers processing of the second token, which calls fetch() again on the same fetcher object. The original callback's reset() then clears the second fetch's state (receiver_ and request_) which causes a crash when the async HTTP response arrives.
Severity
6.5 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
- CWE-476 - NULL Pointer Dereference
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://github.com/envoyproxy/envoy/security/advi… | x_refsource_CONFIRM |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| envoyproxy | envoy |
Affected:
>= 1.36.0, <= 1.36.2
Affected: >= 1.35.0, <= 1.35.6 Affected: >= 1.34.0, <= 1.34.10 Affected: <= 1.33.12 |
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CVE-2025-6491 (GCVE-0-2025-6491)
Vulnerability from cvelistv5 – Published: 2025-07-13 22:10 – Updated: 2025-11-04 21:14
VLAI
Title
NULL Pointer Dereference in PHP SOAP Extension via Large XML Namespace Prefix
Summary
In PHP versions:8.1.* before 8.1.33, 8.2.* before 8.2.29, 8.3.* before 8.3.23, 8.4.* before 8.4.10 when parsing XML data in SOAP extensions, overly large (>2Gb) XML namespace prefix may lead to null pointer dereference. This may lead to crashes and affect the availability of the target server.
Severity
5.9 (Medium)
SSVC
Exploitation: poc
Automatable: no
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
- CWE-476 - NULL Pointer Dereference
Assigner
References
Impacted products
Date Public
2025-07-03 12:27
Credits
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CVE-2025-6496 (GCVE-0-2025-6496)
Vulnerability from cvelistv5 – Published: 2025-06-23 00:00 – Updated: 2025-06-23 13:06
VLAI
Title
HTACG tidy-html5 parser.c InsertNodeAsParent null pointer dereference
Summary
A vulnerability was found in HTACG tidy-html5 5.8.0. It has been declared as problematic. This vulnerability affects the function InsertNodeAsParent of the file src/parser.c. The 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.
Severity
SSVC
Exploitation: poc
Automatable: no
Technical Impact: partial
CISA Coordinator (v2.0.3)
Assigner
References
5 references
| URL | Tags |
|---|---|
| https://vuldb.com/?id.313612 | vdb-entrytechnical-description |
| https://vuldb.com/?ctiid.313612 | signaturepermissions-required |
| https://vuldb.com/?submit.601007 | third-party-advisory |
| https://github.com/htacg/tidy-html5/issues/1141 | issue-tracking |
| https://github.com/user-attachments/files/1965294… | exploit |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| HTACG | tidy-html5 |
Affected:
5.8.0
|
Credits
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CVE-2025-66274 (GCVE-0-2025-66274)
Vulnerability from cvelistv5 – Published: 2026-02-11 12:15 – Updated: 2026-06-09 06:17
VLAI
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 an administrator 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 5.2.9.3410 build 20260214 and later
QuTS hero h5.2.9.3410 build 20260214 and later
QuTS hero h5.3.2.3354 build 20251225 and later
QuTS hero h6.0.0.3397 build 20260206 and later
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
Assigner
References
1 reference
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| QNAP Systems Inc. | QTS |
Affected:
5.2.0 , < 5.2.9.3410 build 20260214
(custom)
|
|
| QNAP Systems Inc. | QuTS hero |
Affected:
h5.2.0 , < h5.2.9.3410 build 20260214
(custom)
Affected: h5.3.0 , < h5.3.2.3354 build 20251225 (custom) Affected: ? , < h6.0.0.3397 build 20260206 (custom) |
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CVE-2025-66646 (GCVE-0-2025-66646)
Vulnerability from cvelistv5 – Published: 2025-12-17 19:18 – Updated: 2025-12-17 20:30
VLAI
Title
RIOT-OS has NULL pointer dereference in gnrc_ipv6_ext_frag_reass
Summary
RIOT is an open-source microcontroller operating system, designed to match the requirements of Internet of Things (IoT) devices and other embedded devices. A vulnerability was discovered in the IPv6 fragmentation reassembly implementation of RIOT OS v2025.07. When receiving an fragmented IPv6 packet with fragment offset 0 and an empty payload, the payload pointer is set to NULL. However, the implementation still tries to copy the payload into the reassembly buffer, resulting in a NULL pointer dereference which crashes the OS (DoS). To trigger the vulnerability, the `gnrc_ipv6_ext_frag` module must be enabled and the attacker must be able to send arbitrary IPv6 packets to the victim. RIOT OS v2025.10 fixes the issue.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
- CWE-476 - NULL Pointer Dereference
Assigner
References
10 references
| URL | Tags |
|---|---|
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| https://github.com/RIOT-OS/RIOT/blob/eb65305cf9f1… | x_refsource_MISC |
| https://github.com/RIOT-OS/RIOT/blob/eb65305cf9f1… | x_refsource_MISC |
| https://github.com/RIOT-OS/RIOT/blob/eb65305cf9f1… | x_refsource_MISC |
| https://github.com/RIOT-OS/RIOT/blob/eb65305cf9f1… | x_refsource_MISC |
| https://github.com/RIOT-OS/RIOT/blob/eb65305cf9f1… | x_refsource_MISC |
| https://github.com/RIOT-OS/RIOT/blob/eb65305cf9f1… | x_refsource_MISC |
| https://github.com/RIOT-OS/RIOT/blob/eb65305cf9f1… | x_refsource_MISC |
| https://github.com/RIOT-OS/RIOT/releases/tag/2025.10 | x_refsource_MISC |
| https://github.com/user-attachments/files/2390399… | x_refsource_MISC |
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CVE-2025-68141 (GCVE-0-2025-68141)
Vulnerability from cvelistv5 – Published: 2026-01-21 19:56 – Updated: 2026-01-22 16:50
VLAI
Title
EVerest vulnerable to null pointer dereference during DC_ChargeLoopRes document deserialization
Summary
EVerest is an EV charging software stack. Prior to version 2025.10.0, during the deserialization of a `DC_ChargeLoopRes` message that includes Receipt as well as TaxCosts, the vector `<DetailedTax>tax_costs` in the target `Receipt` structure is accessed out of bounds. This occurs in the method `template <> void convert(const struct iso20_dc_DetailedTaxType& in, datatypes::DetailedTax& out)` which leads to a null pointer dereference and causes the module to terminate. The EVerest processes and all its modules shut down, affecting all EVSE. Version 2025.10.0 fixes the issue.
Severity
7.4 (High)
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/EVerest/everest-core/security/… | x_refsource_CONFIRM |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| EVerest | everest-core |
Affected:
< 2025.10.0
|
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CVE-2025-68274 (GCVE-0-2025-68274)
Vulnerability from cvelistv5 – Published: 2025-12-16 22:02 – Updated: 2025-12-17 21:15
VLAI
Title
SIPGO library has response DoS vulnerability via nil pointer dereference
Summary
SIPGO is a library for writing SIP services in the GO language. Starting in version 0.3.0 and prior to version 1.0.0-alpha-1, a nil pointer dereference vulnerability is in the SIPGO library's `NewResponseFromRequest` function that affects all normal SIP operations. The vulnerability allows remote attackers to crash any SIP application by sending a single malformed SIP request without a To header. The vulnerability occurs when SIP message parsing succeeds for a request missing the To header, but the response creation code assumes the To header exists without proper nil checks. This affects routine operations like call setup, authentication, and message handling - not just error cases. This vulnerability affects all SIP applications using the sipgo library, not just specific configurations or edge cases, as long as they make use of the `NewResponseFromRequest` function. Version 1.0.0-alpha-1 contains a patch for the issue.
Severity
SSVC
Exploitation: poc
Automatable: yes
Technical Impact: partial
CISA Coordinator (v2.0.3)
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://github.com/emiago/sipgo/security/advisori… | x_refsource_CONFIRM |
| https://github.com/emiago/sipgo/commit/dc9669364a… | x_refsource_MISC |
Impacted products
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CVE-2025-6858 (GCVE-0-2025-6858)
Vulnerability from cvelistv5 – Published: 2025-06-29 11:00 – Updated: 2025-06-30 20:11
VLAI
Title
HDF5 H5Centry.c H5C__flush_single_entry null pointer dereference
Summary
A vulnerability was found in HDF5 1.14.6 and classified as problematic. Affected by this issue is the function H5C__flush_single_entry of the file src/H5Centry.c. The manipulation leads to null pointer dereference. The attack needs to be approached locally. The exploit has been disclosed to the public and may be used.
Severity
SSVC
Exploitation: poc
Automatable: no
Technical Impact: partial
CISA Coordinator (v2.0.3)
Assigner
References
5 references
| URL | Tags |
|---|---|
| https://vuldb.com/?id.314330 | vdb-entrytechnical-description |
| https://vuldb.com/?ctiid.314330 | signaturepermissions-required |
| https://vuldb.com/?submit.602530 | third-party-advisory |
| https://github.com/HDFGroup/hdf5/issues/5576 | issue-tracking |
| https://github.com/user-attachments/files/2062347… | exploit |
Credits
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Mitigation ID: MIT-56
Phase: Implementation
Description:
- 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
Phase: Requirements
Description:
- Select a programming language that is not susceptible to these issues.
Mitigation
Phase: Implementation
Description:
- Check the results of all functions that return a value and verify that the value is non-null before acting upon it.
Mitigation
Phase: Architecture and Design
Description:
- 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
Phase: Implementation
Description:
- 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.