CWE-476
NULL Pointer Dereference
The product dereferences a pointer that it expects to be valid but is NULL.
CVE-2025-68699 (GCVE-0-2025-68699)
Vulnerability from cvelistv5 – Published: 2026-02-04 19:25 – Updated: 2026-02-04 19:51
VLAI
Title
NanoMQ $share/ Subscription Validation and Forwarding Parsing Inconsistency: NULL Pointer Increment Causes Crash
Summary
NanoMQ MQTT Broker (NanoMQ) is an all-around Edge Messaging Platform. In version 0.24.6, NanoMQ has a protocol parsing / forwarding inconsistency when handling shared subscriptions ($share/). A malformed SUBSCRIBE topic such as $share/ab (missing the second /) is not strictly validated during the subscription stage, so the invalid Topic Filter is stored into the subscription table. Later, when any PUBLISH matches this subscription, the broker send path (nmq_pipe_send_start_v4/v5) performs a second $share/ parsing using strchr() and increments the returned pointer without NULL checks. If the second strchr() returns NULL, sub_topic++ turns the pointer into an invalid address (e.g. 0x1). This invalid pointer is then passed into topic_filtern(), which triggers strlen() and crashes with SIGSEGV. The crash is stable and remotely triggerable. This issue has been patched in version 0.24.7.
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
2 references
| URL | Tags |
|---|---|
| https://github.com/nanomq/nanomq/security/advisor… | x_refsource_CONFIRM |
| https://github.com/nanomq/nanomq/commit/89d68d678… | x_refsource_MISC |
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CVE-2025-69252 (GCVE-0-2025-69252)
Vulnerability from cvelistv5 – Published: 2026-02-23 23:56 – Updated: 2026-02-25 16:21
VLAI
Title
free5GC has Null Pointer Dereference in UDM, Leading to Service Panic
Summary
free5gc UDM provides Unified Data Management (UDM) for free5GC, an open-source project for 5th generation (5G) mobile core networks. Versions up to and including 1.4.1 have a NULL Pointer Dereference vulnerability. Remote unauthenticated attackers can trigger a service panic (Denial of Service) by sending a crafted PUT request with an unexpected ueId, crashing the UDM service. All deployments of free5GC using the UDM component may be affected. free5gc/udm pull request 76 contains a fix for the issue. No direct workaround is available at the application level. Applying the official patch is recommended.
Severity
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
- CWE-476 - NULL Pointer Dereference
Assigner
References
4 references
| URL | Tags |
|---|---|
| https://github.com/free5gc/free5gc/security/advis… | x_refsource_CONFIRM |
| https://github.com/free5gc/free5gc/issues/752 | x_refsource_MISC |
| https://github.com/free5gc/udm/pull/76 | x_refsource_MISC |
| https://github.com/free5gc/udm/commit/504b14458d1… | x_refsource_MISC |
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CVE-2025-69421 (GCVE-0-2025-69421)
Vulnerability from cvelistv5 – Published: 2026-01-27 16:01 – Updated: 2026-05-12 12:08
VLAI
Title
NULL Pointer Dereference in PKCS12_item_decrypt_d2i_ex function
Summary
Issue summary: Processing a malformed PKCS#12 file can trigger a NULL pointer
dereference in the PKCS12_item_decrypt_d2i_ex() function.
Impact summary: A NULL pointer dereference can trigger a crash which leads to
Denial of Service for an application processing PKCS#12 files.
The PKCS12_item_decrypt_d2i_ex() function does not check whether the oct
parameter is NULL before dereferencing it. When called from
PKCS12_unpack_p7encdata() with a malformed PKCS#12 file, this parameter can
be NULL, causing a crash. The vulnerability is limited to Denial of Service
and cannot be escalated to achieve code execution or memory disclosure.
Exploiting this issue requires an attacker to provide a malformed PKCS#12 file
to an application that processes it. For that reason the issue was assessed as
Low severity according to our Security Policy.
The FIPS modules in 3.6, 3.5, 3.4, 3.3 and 3.0 are not affected by this issue,
as the PKCS#12 implementation is outside the OpenSSL FIPS module boundary.
OpenSSL 3.6, 3.5, 3.4, 3.3, 3.0, 1.1.1 and 1.0.2 are vulnerable to this issue.
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
7 references
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| OpenSSL | OpenSSL |
Affected:
3.6.0 , < 3.6.1
(semver)
Affected: 3.5.0 , < 3.5.5 (semver) Affected: 3.4.0 , < 3.4.4 (semver) Affected: 3.3.0 , < 3.3.6 (semver) Affected: 3.0.0 , < 3.0.19 (semver) Affected: 1.1.1 , < 1.1.1ze (custom) Affected: 1.0.2 , < 1.0.2zn (custom) |
|
| Siemens | SIMATIC S7-1500 TM MFP - GNU/Linux subsystem |
Affected:
0 , < *
(custom)
|
Date Public
2026-01-27 14:00
Credits
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CVE-2025-6966 (GCVE-0-2025-6966)
Vulnerability from cvelistv5 – Published: 2025-12-05 12:59 – Updated: 2025-12-15 22:04
VLAI
Title
Null-pointer dereference in python-apt TagSection.keys()
Summary
NULL pointer dereference in TagSection.keys() in python-apt on APT-based Linux systems allows a local attacker to cause a denial of service (process crash) via a crafted deb822 file with a malformed non-UTF-8 key.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
- CWE-476 - NULL Pointer Dereference
Assigner
References
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Canonical | python-apt |
Affected:
3.0 , < 3.0.0ubuntu1.1
(custom)
Affected: 3.0 , < 3.0.0ubuntu0.25.04.1 (custom) Affected: 2.7 , < 2.7.7ubuntu5.1 (custom) Affected: 2.4 , < 2.4.0ubuntu4.1 (custom) Affected: 2.0 , < 2.0.1ubuntu0.20.04.1+esm1 (custom) Affected: 1.6 , < 1.6.6ubuntu0.1~esm1 (custom) Affected: 1.1 , < 1.1.0~beta1ubuntu0.16.04.12+esm1 (custom) Affected: 0 , < 0.9.3.5ubuntu3+esm5 (custom) |
Date Public
2025-12-05 12:00
Credits
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CVE-2025-7007 (GCVE-0-2025-7007)
Vulnerability from cvelistv5 – Published: 2025-12-01 16:34 – Updated: 2025-12-01 17:08
VLAI
Title
Null pointer dereference in Avast Antivirus on macOS (16.0.0) or Linux (3.0.3)
Summary
NULL Pointer Dereference vulnerability in Avast Antivirus on MacOS, Avast Anitvirus on Linux when scanning a malformed Windows PE file causes the antivirus process to crash.This issue affects Antivirus: 16.0.0; Anitvirus: 3.0.3.
Severity
7.5 (High)
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator (v2.0.3)
CWE
- CWE-476 - NULL Pointer Dereference
Assigner
References
1 reference
Impacted products
Credits
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CVE-2025-7209 (GCVE-0-2025-7209)
Vulnerability from cvelistv5 – Published: 2025-07-09 01:02 – Updated: 2025-07-09 17:04
VLAI
Title
9fans plan9port x509.c value_decode null pointer dereference
Summary
A vulnerability has been found in 9fans plan9port up to 9da5b44 and classified as problematic. Affected by this vulnerability is the function value_decode in the library src/libsec/port/x509.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. This product takes the approach of rolling releases to provide continious delivery. Therefore, version details for affected and updated releases are not available. The identifier of the patch is deae8939583d83fd798fca97665e0e94656c3ee8. It is recommended to apply a patch to fix 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.315157 | vdb-entrytechnical-description |
| https://vuldb.com/?ctiid.315157 | signaturepermissions-required |
| https://vuldb.com/?submit.607685 | third-party-advisory |
| https://github.com/9fans/plan9port/issues/711 | issue-tracking |
| https://github.com/9fans/plan9port/issues/711#iss… | issue-tracking |
| https://github.com/user-attachments/files/1969836… | exploit |
| https://git.9front.org/plan9front/plan9front/deae… | patch |
Credits
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CVE-2025-7462 (GCVE-0-2025-7462)
Vulnerability from cvelistv5 – Published: 2025-07-12 05:32 – Updated: 2025-11-03 17:45
VLAI
Title
Artifex GhostPDL New Output File Open Error gdevpdf.c pdf_ferror null pointer dereference
Summary
A vulnerability was found in Artifex GhostPDL up to 3989415a5b8e99b9d1b87cc9902bde9b7cdea145. It has been classified as problematic. This affects the function pdf_ferror of the file devices/vector/gdevpdf.c of the component New Output File Open Error Handler. The manipulation leads to null pointer dereference. It is possible to initiate the attack remotely. The identifier of the patch is 619a106ba4c4abed95110f84d5efcd7aee38c7cb. It is recommended to apply a patch to fix this issue.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator (v2.0.3)
Assigner
References
6 references
| URL | Tags |
|---|---|
| https://vuldb.com/?id.316113 | vdb-entrytechnical-description |
| https://vuldb.com/?ctiid.316113 | signaturepermissions-required |
| https://vuldb.com/?submit.610173 | third-party-advisory |
| https://cgit.ghostscript.com/cgi-bin/cgit.cgi/gho… | patch |
| https://artifex.com/ | product |
| https://lists.debian.org/debian-lts-announce/2025… |
Impacted products
Credits
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CVE-2025-7700 (GCVE-0-2025-7700)
Vulnerability from cvelistv5 – Published: 2025-11-07 18:59 – Updated: 2026-05-06 14:38
VLAI
Title
Ffmpeg: null pointer dereference in ffmpeg als decoder (libavcodec/alsdec.c)
Summary
A flaw was found in FFmpeg’s ALS audio decoder, where it does not properly check for memory allocation failures. This can cause the application to crash when processing certain malformed audio files. While it does not lead to data theft or system control, it can be used to disrupt services and cause a denial of service.
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
3 references
| URL | Tags |
|---|---|
| https://access.redhat.com/security/cve/CVE-2025-7700 | vdb-entryx_refsource_REDHAT |
| https://bugzilla.redhat.com/show_bug.cgi?id=2380420 | issue-trackingx_refsource_REDHAT |
| https://github.com/FFmpeg/FFmpeg/commit/35a6de137… |
Date Public
2025-07-15 00:00
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CVE-2025-7797 (GCVE-0-2025-7797)
Vulnerability from cvelistv5 – Published: 2025-07-18 17:44 – Updated: 2025-07-18 18:04
VLAI
Title
GPAC dash_client.c gf_dash_download_init_segment null pointer dereference
Summary
A vulnerability was found in GPAC up to 2.4. It has been rated as problematic. Affected by this issue is the function gf_dash_download_init_segment of the file src/media_tools/dash_client.c. The manipulation of the argument base_init_url leads to null pointer dereference. The attack may be launched remotely. The exploit has been disclosed to the public and may be used. The patch is identified as 153ea314b6b053db17164f8bc3c7e1e460938eaa. It is recommended to apply a patch to fix this issue.
Severity
SSVC
Exploitation: poc
Automatable: yes
Technical Impact: partial
CISA Coordinator (v2.0.3)
Assigner
References
5 references
| URL | Tags |
|---|---|
| https://vuldb.com/?id.316862 | vdb-entrytechnical-description |
| https://vuldb.com/?ctiid.316862 | signaturepermissions-required |
| https://vuldb.com/?submit.616664 | third-party-advisory |
| https://drive.google.com/file/d/1Z-C6RajpZ40ujo1i… | exploit |
| https://github.com/gpac/gpac/commit/153ea314b6b05… | patch |
Impacted products
Credits
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CVE-2025-8090 (GCVE-0-2025-8090)
Vulnerability from cvelistv5 – Published: 2026-01-13 16:36 – Updated: 2026-01-13 21:41
VLAI
Title
Vulnerability in the QNX Neutrino Kernel impacts the QNX Software Development Platform and QNX OS for Safety
Summary
Null pointer dereference in the MsgRegisterEvent() system call could allow an attacker with local access and code execution abilities to crash the QNX Neutrino kernel.
Severity
6.2 (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://support.blackberry.com/pkb/s/article/141027 | vendor-advisory |
Impacted products
3 products
| Vendor | Product | Version | |
|---|---|---|---|
| BlackBerry Ltd | QNX Software Development Platform |
Affected:
7.1 and 7.0
(custom)
Affected: cpe:2.3:a:blackberry:qnx_software_development_platform:7.1:*:*:*:*:*:*:* (cpe) Affected: cpe:2.3:a:blackberry:qnx_software_development_platform:7.0:*:*:*:*:*:*:* (cpe) |
|
| BlackBerry Ltd | QNX OS for Safety |
Affected:
2.2.7 and earlier
(custom)
Affected: cpe:2.3:o:blackberry:qnx_os_for_safety:2.2:7:*:*:*:*:*:* (cpe) Affected: 2.1.4 and earlier (custom) Affected: cpe:2.3:o:blackberry:qnx_os_for_safety:2.1:4:*:*:*:*:*:* (cpe) Affected: 2.0.2 and earlier (custom) Affected: cpe:2.3:o:blackberry:qnx_os_for_safety:2.0:2:*:*:*:*:*:* (cpe) |
|
| BlackBerry Ltd. | QNX OS for Medical |
Affected:
2.0.1 and earlier
(custom)
Affected: cpe:2.3:o:blackberry:qnx_os_for_medical:2.0:1:*:*:*:*:*:* (cpe) |
Date Public
2026-01-13 16:25
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{
"descriptions": [
{
"cweId": "CWE-476",
"description": "CWE-476 NULL Pointer Dereference",
"lang": "en",
"type": "CWE"
}
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"providerMetadata": {
"dateUpdated": "2026-01-13T18:57:38.781Z",
"orgId": "dbe78b00-5e7b-4fda-8748-329789ecfc5c",
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"tags": [
"vendor-advisory"
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"url": "https://support.blackberry.com/pkb/s/article/141027"
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"source": {
"discovery": "UNKNOWN"
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"title": "Vulnerability in the QNX Neutrino Kernel impacts the QNX Software Development Platform and QNX OS for Safety",
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"assignerShortName": "blackberry",
"cveId": "CVE-2025-8090",
"datePublished": "2026-01-13T16:36:21.061Z",
"dateReserved": "2025-07-23T15:38:00.519Z",
"dateUpdated": "2026-01-13T21:41:51.831Z",
"state": "PUBLISHED"
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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.