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.
6309 vulnerabilities reference this CWE, most recent first.
CVE-2026-3238 (GCVE-0-2026-3238)
Vulnerability from cvelistv5 – Published: 2026-06-08 07:34 – Updated: 2026-07-15 01:08
VLAI
EPSS
VEX
Title
Samba: denial of service against ad dc wins server
Summary
A flaw was found in Samba’s WINS server component when running as an Active Directory Domain Controller. The WINS protocol handlers for certain request types did not properly validate incoming packets, allowing an unauthenticated remote attacker to trigger a NULL pointer dereference and crash the WINS service using specially crafted UDP packets.
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
| URL | Tags |
|---|---|
| https://access.redhat.com/security/cve/CVE-2026-3238 | vdb-entryx_refsource_REDHAT |
| https://bugzilla.redhat.com/show_bug.cgi?id=2486176 | issue-trackingx_refsource_REDHAT |
| https://www.samba.org/samba/security/CVE-2026-3238.html | |
| https://security.access.redhat.com/data/csaf/v2/v… | x_sadp-csaf-vex |
Impacted products
6 products
| Vendor | Product | Version | |
|---|---|---|---|
| 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
2026-05-26 00:00
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CVE-2026-3202 (GCVE-0-2026-3202)
Vulnerability from cvelistv5 – Published: 2026-02-25 14:35 – Updated: 2026-03-27 13:56
VLAI
EPSS
VEX
Title
NULL Pointer Dereference in Wireshark
Summary
NTS-KE protocol dissector crash in Wireshark 4.6.0 to 4.6.3 allows denial of service
Severity
4.7 (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://www.wireshark.org/security/wnpa-sec-2026-… | |
| https://gitlab.com/wireshark/wireshark/-/issues/21000 | issue-trackingpermissions-required |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Wireshark Foundation | Wireshark |
Affected:
4.6.0 , < 4.6.4
(semver)
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CVE-2026-3146 (GCVE-0-2026-3146)
Vulnerability from cvelistv5 – Published: 2026-02-25 03:02 – Updated: 2026-02-25 15:52 X_Open Source
VLAI
EPSS
VEX
Title
libvips matrixload.c vips_foreign_load_matrix_header null pointer dereference
Summary
A vulnerability has been found in libvips up to 8.18.0. The impacted element is the function vips_foreign_load_matrix_header of the file libvips/foreign/matrixload.c. The manipulation leads to null pointer dereference. The attack needs to be performed locally. The identifier of the patch is d4ce337c76bff1b278d7085c3c4f4725e3aa6ece. To fix this issue, it is recommended to deploy a patch.
Severity
SSVC
Exploitation: poc
Automatable: no
Technical Impact: partial
CISA Coordinator (v2.0.3)
Assigner
References
7 references
| URL | Tags |
|---|---|
| https://vuldb.com/?id.347652 | vdb-entrytechnical-description |
| https://vuldb.com/?ctiid.347652 | signaturepermissions-required |
| https://vuldb.com/?submit.758691 | third-party-advisory |
| https://github.com/libvips/libvips/issues/4875 | issue-tracking |
| https://github.com/libvips/libvips/pull/4888 | issue-trackingpatch |
| https://github.com/libvips/libvips/commit/d4ce337… | patch |
| https://github.com/libvips/libvips/ | product |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| n/a | libvips |
Affected:
8.0
Affected: 8.1 Affected: 8.2 Affected: 8.3 Affected: 8.4 Affected: 8.5 Affected: 8.6 Affected: 8.7 Affected: 8.8 Affected: 8.9 Affected: 8.10 Affected: 8.11 Affected: 8.12 Affected: 8.13 Affected: 8.14 Affected: 8.15 Affected: 8.16 Affected: 8.17 Affected: 8.18.0 cpe:2.3:a:libvips:libvips:*:*:*:*:*:*:*:* |
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CVE-2026-2903 (GCVE-0-2026-2903)
Vulnerability from cvelistv5 – Published: 2026-02-22 00:32 – Updated: 2026-06-23 15:50 X_Open Source
VLAI
EPSS
VEX
Title
skvadrik re2c ast.cc check_and_merge_special_rules null pointer dereference
Summary
A flaw has been found in skvadrik re2c up to 4.4. Impacted is the function check_and_merge_special_rules of the file src/parse/ast.cc. This manipulation causes null pointer dereference. The attack can only be executed locally. The exploit has been published and may be used. Patch name: febeb977936f9519a25d9fbd10ff8256358cdb97. It is suggested to install a patch to address this issue.
Severity
SSVC
Exploitation: poc
Automatable: no
Technical Impact: partial
CISA Coordinator (v2.0.3)
Assigner
References
8 references
| URL | Tags |
|---|---|
| https://vuldb.com/?id.347210 | vdb-entrytechnical-description |
| https://vuldb.com/?ctiid.347210 | signaturepermissions-required |
| https://vuldb.com/?submit.755030 | third-party-advisory |
| https://github.com/skvadrik/re2c/issues/571 | issue-tracking |
| https://github.com/skvadrik/re2c/issues/571#issue… | issue-tracking |
| https://github.com/oneafter/0202/blob/main/re/repro | exploit |
| https://github.com/skvadrik/re2c/commit/febeb9779… | patch |
| https://github.com/skvadrik/re2c/ | product |
Impacted products
Credits
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CVE-2026-2642 (GCVE-0-2026-2642)
Vulnerability from cvelistv5 – Published: 2026-02-18 06:32 – Updated: 2026-02-23 10:16
VLAI
EPSS
VEX
Title
ggreer the_silver_searcher search.c search_stream null pointer dereference
Summary
A security vulnerability has been detected in ggreer the_silver_searcher up to 2.2.0. The impacted element is the function search_stream of the file src/search.c. The manipulation leads to null pointer dereference. Local access is required to approach this attack. The exploit has been disclosed publicly 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.346398 | vdb-entrytechnical-description |
| https://vuldb.com/?ctiid.346398 | signaturepermissions-required |
| https://vuldb.com/?submit.752769 | third-party-advisory |
| https://github.com/ggreer/the_silver_searcher/iss… | issue-tracking |
| https://github.com/oneafter/0119/blob/main/segv1 | exploit |
| https://github.com/ggreer/the_silver_searcher/ | product |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| ggreer | the_silver_searcher |
Affected:
2.0
Affected: 2.1 Affected: 2.2.0 |
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CVE-2026-2507 (GCVE-0-2026-2507)
Vulnerability from cvelistv5 – Published: 2026-02-18 15:55 – Updated: 2026-02-18 17:52
VLAI
EPSS
VEX
Title
BIG-IP TMM Vulnerability
Summary
When BIG-IP AFM or BIG-IP DDoS is provisioned, undisclosed traffic can cause TMM to terminate. Note: Software versions which have reached End of Technical Support (EoTS) are not evaluated.
Severity
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://my.f5.com/manage/s/article/K000160003 | vendor-advisory |
Impacted products
Date Public
2026-02-18 15:00
Credits
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CVE-2026-2062 (GCVE-0-2026-2062)
Vulnerability from cvelistv5 – Published: 2026-02-06 18:32 – Updated: 2026-02-23 09:26 X_Open Source
VLAI
EPSS
VEX
Title
Open5GS PGW S5U Address sgwc_sxa_handle_session_modification_response null pointer dereference
Summary
A vulnerability was identified in Open5GS up to 2.7.6. This affects the function sgwc_s5c_handle_modify_bearer_response/sgwc_sxa_handle_session_modification_response of the component PGW S5U Address Handler. The manipulation leads to null pointer dereference. The attack can be initiated remotely. The exploit is publicly available and might be used. The identifier of the patch is f1bbd7b57f831e2a070780a7d8d5d4c73babdb59. Applying a patch is the recommended action to fix this issue.
Severity
SSVC
Exploitation: poc
Automatable: yes
Technical Impact: partial
CISA Coordinator (v2.0.3)
Assigner
References
7 references
| URL | Tags |
|---|---|
| https://vuldb.com/?id.344622 | vdb-entrytechnical-description |
| https://vuldb.com/?ctiid.344622 | signaturepermissions-required |
| https://vuldb.com/?submit.744719 | third-party-advisory |
| https://github.com/open5gs/open5gs/issues/4257 | issue-tracking |
| https://github.com/open5gs/open5gs/issues/4257#is… | exploitissue-tracking |
| https://github.com/open5gs/open5gs/commit/f1bbd7b… | patch |
| https://github.com/open5gs/open5gs/ | product |
Impacted products
Credits
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CVE-2026-1991 (GCVE-0-2026-1991)
Vulnerability from cvelistv5 – Published: 2026-02-06 05:32 – Updated: 2026-02-23 09:21
VLAI
EPSS
VEX
Title
libuvc UVC Descriptor device.c uvc_scan_streaming null pointer dereference
Summary
A vulnerability was detected in libuvc up to 0.0.7. Affected is the function uvc_scan_streaming of the file src/device.c of the component UVC Descriptor Handler. The manipulation results in null pointer dereference. The attack needs to be approached locally. The exploit is now 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.344509 | vdb-entrytechnical-description |
| https://vuldb.com/?ctiid.344509 | signaturepermissions-required |
| https://vuldb.com/?submit.743388 | third-party-advisory |
| https://github.com/libuvc/libuvc/issues/300 | issue-tracking |
| https://github.com/oneafter/0104/blob/main/repro | exploit |
| https://github.com/libuvc/libuvc/ | product |
Impacted products
Credits
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CVE-2026-1990 (GCVE-0-2026-1990)
Vulnerability from cvelistv5 – Published: 2026-02-06 05:02 – Updated: 2026-02-23 09:21
VLAI
EPSS
VEX
Title
oatpp Type.hpp ObjectWrapper null pointer dereference
Summary
A security vulnerability has been detected in oatpp up to 1.3.1. This impacts the function oatpp::data::type::ObjectWrapper::ObjectWrapper of the file src/oatpp/data/type/Type.hpp. The manipulation leads to null pointer dereference. Local access is required to approach this attack. The exploit has been disclosed publicly 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.344508 | vdb-entrytechnical-description |
| https://vuldb.com/?ctiid.344508 | signaturepermissions-required |
| https://vuldb.com/?submit.743387 | third-party-advisory |
| https://github.com/oatpp/oatpp/issues/1080 | issue-tracking |
| https://github.com/oatpp/oatpp/issues/1080#issue-… | exploitissue-tracking |
| https://github.com/oatpp/oatpp/ | product |
Credits
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CVE-2026-1976 (GCVE-0-2026-1976)
Vulnerability from cvelistv5 – Published: 2026-02-06 03:02 – Updated: 2026-02-23 09:20
VLAI
EPSS
VEX
Title
Free5GC SMF SessionDeletionResponse null pointer dereference
Summary
A weakness has been identified in Free5GC up to 4.1.0. Affected is the function SessionDeletionResponse of the component SMF. This manipulation causes null pointer dereference. The attack is possible to be carried out remotely. The exploit has been made available to the public and could be used for attacks. It is suggested to install a patch to address this issue.
Severity
SSVC
Exploitation: poc
Automatable: yes
Technical Impact: partial
CISA Coordinator (v2.0.3)
Assigner
References
7 references
| URL | Tags |
|---|---|
| https://vuldb.com/?id.344498 | vdb-entrytechnical-description |
| https://vuldb.com/?ctiid.344498 | signaturepermissions-required |
| https://vuldb.com/?submit.743239 | third-party-advisory |
| https://github.com/free5gc/free5gc/issues/817 | issue-tracking |
| https://github.com/free5gc/free5gc/issues/817#iss… | exploitissue-tracking |
| https://github.com/free5gc/smf/pull/189 | issue-trackingpatch |
| https://github.com/free5gc/free5gc/ | product |
Impacted products
Credits
{
"containers": {
"adp": [
{
"metrics": [
{
"other": {
"content": {
"id": "CVE-2026-1976",
"options": [
{
"Exploitation": "poc"
},
{
"Automatable": "yes"
},
{
"Technical Impact": "partial"
}
],
"role": "CISA Coordinator",
"timestamp": "2026-02-06T19:33:53.291970Z",
"version": "2.0.3"
},
"type": "ssvc"
}
}
],
"providerMetadata": {
"dateUpdated": "2026-02-06T19:34:01.663Z",
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP"
},
"title": "CISA ADP Vulnrichment"
}
],
"cna": {
"affected": [
{
"cpes": [
"cpe:2.3:a:free5gc:free5gc:*:*:*:*:*:*:*:*"
],
"modules": [
"SMF"
],
"product": "Free5GC",
"vendor": "n/a",
"versions": [
{
"status": "affected",
"version": "4.0"
},
{
"status": "affected",
"version": "4.1.0"
}
]
}
],
"credits": [
{
"lang": "en",
"type": "reporter",
"value": "LinZiyu (VulDB User)"
}
],
"descriptions": [
{
"lang": "en",
"value": "A weakness has been identified in Free5GC up to 4.1.0. Affected is the function SessionDeletionResponse of the component SMF. This manipulation causes null pointer dereference. The attack is possible to be carried out remotely. The exploit has been made available to the public and could be used for attacks. It is suggested to install a patch to address this issue."
}
],
"metrics": [
{
"cvssV4_0": {
"baseScore": 6.9,
"baseSeverity": "MEDIUM",
"vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:P",
"version": "4.0"
}
},
{
"cvssV3_1": {
"baseScore": 5.3,
"baseSeverity": "MEDIUM",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L/E:P/RL:O/RC:C",
"version": "3.1"
}
},
{
"cvssV3_0": {
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"baseSeverity": "MEDIUM",
"vectorString": "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L/E:P/RL:O/RC:C",
"version": "3.0"
}
},
{
"cvssV2_0": {
"baseScore": 5,
"vectorString": "AV:N/AC:L/Au:N/C:N/I:N/A:P/E:POC/RL:OF/RC:C",
"version": "2.0"
}
}
],
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-476",
"description": "NULL Pointer Dereference",
"lang": "en",
"type": "CWE"
}
]
},
{
"descriptions": [
{
"cweId": "CWE-404",
"description": "Denial of Service",
"lang": "en",
"type": "CWE"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2026-02-23T09:20:25.492Z",
"orgId": "1af790b2-7ee1-4545-860a-a788eba489b5",
"shortName": "VulDB"
},
"references": [
{
"name": "VDB-344498 | Free5GC SMF SessionDeletionResponse null pointer dereference",
"tags": [
"vdb-entry",
"technical-description"
],
"url": "https://vuldb.com/?id.344498"
},
{
"name": "VDB-344498 | CTI Indicators (IOB, IOC, IOA)",
"tags": [
"signature",
"permissions-required"
],
"url": "https://vuldb.com/?ctiid.344498"
},
{
"name": "Submit #743239 | free5gc SMF v4.1.0 Denial of Service",
"tags": [
"third-party-advisory"
],
"url": "https://vuldb.com/?submit.743239"
},
{
"tags": [
"issue-tracking"
],
"url": "https://github.com/free5gc/free5gc/issues/817"
},
{
"tags": [
"exploit",
"issue-tracking"
],
"url": "https://github.com/free5gc/free5gc/issues/817#issue-3832188092"
},
{
"tags": [
"issue-tracking",
"patch"
],
"url": "https://github.com/free5gc/smf/pull/189"
},
{
"tags": [
"product"
],
"url": "https://github.com/free5gc/free5gc/"
}
],
"timeline": [
{
"lang": "en",
"time": "2026-02-05T00:00:00.000Z",
"value": "Advisory disclosed"
},
{
"lang": "en",
"time": "2026-02-05T01:00:00.000Z",
"value": "VulDB entry created"
},
{
"lang": "en",
"time": "2026-02-09T17:03:04.000Z",
"value": "VulDB entry last update"
}
],
"title": "Free5GC SMF SessionDeletionResponse null pointer dereference"
}
},
"cveMetadata": {
"assignerOrgId": "1af790b2-7ee1-4545-860a-a788eba489b5",
"assignerShortName": "VulDB",
"cveId": "CVE-2026-1976",
"datePublished": "2026-02-06T03:02:11.211Z",
"dateReserved": "2026-02-05T13:33:54.329Z",
"dateUpdated": "2026-02-23T09:20:25.492Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}
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.