Common Weakness Enumeration

CWE-476

Allowed

NULL Pointer Dereference

Abstraction: Base · Status: Stable

The product dereferences a pointer that it expects to be valid but is NULL.

6677 vulnerabilities reference this CWE, most recent first.

CVE-2026-19888 (GCVE-0-2026-19888)

Vulnerability from cvelistv5 – Published: 2026-09-23 16:04 – Updated: 2026-09-23 16:46
VLAI
Title
NULL pointer dereference in SCRAM client-final-message parsing in PgBouncer
Summary
Missing validation of a mandatory attribute in the SCRAM client-final-message parser in PgBouncer through 1.25.2 allows an unauthenticated remote attacker to crash the process. A malformed message can make the parser report success while leaving a required value unset, which is then dereferenced as a NULL pointer. The crash occurs before any credential is verified, so no valid account is required. Because PgBouncer serves all clients from a single process, this terminates every pooled connection.
SSVC
Exploitation: none Automatable: yes Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-23 16:33 UTC
CWE
  • CWE-476 - NULL Pointer Dereference
References
Impacted products
Vendor Product Version
n/a PgBouncer Affected: 0 , ≤ 1.25.2 (semver)
Show details on NVD website

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CVE-2026-19411 (GCVE-0-2026-19411)

Vulnerability from cvelistv5 – Published: 2026-08-10 20:45 – Updated: 2026-08-11 13:29
VLAI
Title
Shim/dp.c library: null-pointer dereference in is_removable_media_path() when devicepathtostr() returns null
Summary
A NULL pointer vulnerability has been found in the the shim application of dp.c library. A missing NULL pointer could allow attackers to perform a denial of service attack on a system that uses shim application for UEFI bootloader.
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-11 13:28 UTC
CWE
  • CWE-476 - NULL Pointer Dereference
References
URL Tags
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https://bugzilla.redhat.com/show_bug.cgi?id=2513060 issue-trackingx_refsource_REDHAT
Impacted products
Vendor Product Version
Red Hat Red Hat Enterprise Linux 7     cpe:/o:redhat:enterprise_linux:7
Create a notification for this product.
Red Hat Red Hat Enterprise Linux 8     cpe:/o:redhat:enterprise_linux:8
Create a notification for this product.
Red Hat Red Hat Enterprise Linux 9     cpe:/o:redhat:enterprise_linux:9
Create a notification for this product.
Date Public
2026-08-10 09:00
Show details on NVD website

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CVE-2026-19026 (GCVE-0-2026-19026)

Vulnerability from cvelistv5 – Published: 2026-08-05 22:47 – Updated: 2026-08-06 14:31
VLAI
Title
Nbit filter NULL/short parameter-array dereference
Summary
H5Z__filter_nbit in H5Znbit.c in HDF5 through 2.3.0 dereferences cd_values[0] through cd_values[4] without validating that cd_values is non-NULL or that cd_nelmts is at least 5, the fixed size of the filter's header. This allows attackers to cause a denial of service via a crafted HDF5 file that stores the N-Bit filter pipeline message with zero client-data values, opened and read via H5Dread, e.g. by the h5ls or h5repack tools.
SSVC
Exploitation: poc Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-06 14:31 UTC
CWE
  • CWE-476 - NULL pointer dereference
  • CWE-1284 - Improper validation of specified quantity in input
Impacted products
Vendor Product Version
The HDF Group HDF5 Affected: <=2.3.0
Create a notification for this product.
Show details on NVD website

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CVE-2026-19024 (GCVE-0-2026-19024)

Vulnerability from cvelistv5 – Published: 2026-08-05 22:14 – Updated: 2026-08-06 15:30
VLAI
Title
HDF5 H5Pget_fill_value NULL Pointer Dereference via Malformed Fill Value Message
Summary
NULL pointer dereference in H5Pget_fill_value in HDF5 before 2.3.0 allows attackers to cause a denial of service via a dataset whose version 1 or 2 fill value message has the "defined" flag set together with a negative size field, which is not normalized to the library's "undefined" sentinel and reaches H5T_path_find with a NULL datatype.
SSVC
Exploitation: poc Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-06 14:36 UTC
CWE
  • CWE-476 - NULL pointer dereference
References
Impacted products
Vendor Product Version
The HDF Group HDF5 Affected: <= 2.3.0 (custom)
Create a notification for this product.
Show details on NVD website

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CVE-2026-19012 (GCVE-0-2026-19012)

Vulnerability from cvelistv5 – Published: 2026-08-07 19:18 – Updated: 2026-08-10 18:24
VLAI
Title
Authenticated denial of service in Consul Enterprise-to-Community Edition downgrade path
Summary
Consul Community Edition and Consul Enterprise 1.18.0 through 2.0.2 are vulnerable to an authenticated denial of service in the Enterprise-to-Community Edition downgrade path that may allow an authorized caller to crash the Consul server. A caller with config-entry write permission can submit a service-router configuration entry that causes the agent to exit unexpectedly. This vulnerability, CVE-2026-19012, is fixed in Consul 2.0.3 and Consul Enterprise 1.21.17, 1.22.11, and 2.0.3.
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-10 17:45 UTC
CWE
  • CWE-476 - NULL Pointer Dereference
Impacted products
Vendor Product Version
HashiCorp Consul Affected: 1.18.0 , < 2.0.3 (semver)
Create a notification for this product.
HashiCorp Consul Enterprise Affected: 1.18.0 , < 2.0.3 (semver)
Create a notification for this product.
Show details on NVD website

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CVE-2026-18699 (GCVE-0-2026-18699)

Vulnerability from cvelistv5 – Published: 2026-08-11 18:46 – Updated: 2026-08-11 20:18
VLAI
Title
Improper Input Validation in MongoDB Query Planner Leads to Denial of Service
Summary
An issue in MongoDB Server's query planner could allow an authenticated user with read-level privileges to cause the server process to terminate unexpectedly by submitting a specially formed query against a collection with a text index. This could result in a denial of service, affecting connected clients and in-flight operations.
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-11 20:17 UTC
CWE
  • CWE-476 - NULL Pointer Dereference
References
Impacted products
Vendor Product Version
MongoDB MongoDB Server Affected: 8.3.0 , < 8.3.8 (semver)
Affected: 8.0 , < 8.0.29 (semver)
Affected: 7.0 , < 7.0.40 (semver)
Create a notification for this product.
Show details on NVD website

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CVE-2026-18638 (GCVE-0-2026-18638)

Vulnerability from cvelistv5 – Published: 2026-08-11 15:00 – Updated: 2026-08-11 17:22
VLAI
Title
Velociraptor server crash via the SetPassword API
Summary
Any authenticated Velociraptor user — including one holding only the readerrole — can terminate the entire server process with a single request, by calling SetPassword with a username that does not exist.
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-11 17:15 UTC
CWE
  • CWE-476 - NULL pointer dereference
  • CWE-703 - Improper Check or Handling of Exceptional Conditions
Impacted products
Vendor Product Version
Rapid7 Velociraptor Affected: 0 , < 0.77.2 (semver)
Create a notification for this product.
Show details on NVD website

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CVE-2026-18453 (GCVE-0-2026-18453)

Vulnerability from cvelistv5 – Published: 2026-09-07 14:14 – Updated: 2026-09-09 14:40
VLAI
Title
389-ds-base: 389-ds-base: pre-authentication null pointer dereference via paged results and use_one_backend control in op_shared_search
Summary
A flaw was found in 389 Directory Server. A missing NULL pointer check in the paged results handling of op_shared_search allows an unauthenticated remote attacker to crash the LDAP server by sending a crafted sequence of search requests using the USE_ONE_BACKEND control, resulting in denial of service.
SSVC
Exploitation: none Automatable: yes Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-09 14:40 UTC
CWE
  • CWE-476 - NULL Pointer Dereference
References
URL Tags
https://access.redhat.com/errata/RHSA-2026:64771 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:64776 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:64778 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:64779 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:64780 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:64781 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:64783 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:64784 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:64785 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:64789 vendor-advisoryx_refsource_REDHAT
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https://access.redhat.com/errata/RHSA-2026:65119 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/security/cve/CVE-2026-18453 vdb-entryx_refsource_REDHAT
https://bugzilla.redhat.com/show_bug.cgi?id=2509696 issue-trackingx_refsource_REDHAT
Impacted products
Vendor Product Version
Red Hat Red Hat Directory Server 11.7 E4S for RHEL 8 Unaffected: 8080020260903102346.f969626e , < * (rpm)
    cpe:/a:redhat:directory_server_e4s:11.7::el8
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Red Hat Red Hat Directory Server 11.9 for RHEL 8 Unaffected: 8100020260904171440.37ed7c03 , < * (rpm)
    cpe:/a:redhat:directory_server:11.9::el8
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Red Hat Red Hat Directory Server 12.2 E4S for RHEL 9 Unaffected: 9020020260903155914.1674d574 , < * (rpm)
    cpe:/a:redhat:directory_server_e4s:12.2::el9
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Red Hat Red Hat Directory Server 12.4 E4S for RHEL 9 Unaffected: 9040020260903102623.1674d574 , < * (rpm)
    cpe:/a:redhat:directory_server_e4s:12.4::el9
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Red Hat Red Hat Enterprise Linux 10 Unaffected: 0:3.2.0-10.el10_2 , < * (rpm)
    cpe:/o:redhat:enterprise_linux:10.2
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Red Hat Red Hat Enterprise Linux 10.0 Extended Update Support Unaffected: 0:3.0.6-21.el10_0 , < * (rpm)
    cpe:/o:redhat:enterprise_linux_eus:10.0
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Red Hat Red Hat Enterprise Linux 7 Extended Lifecycle Support Unaffected: 0:1.3.11.1-15.el7_9 , < * (rpm)
    cpe:/o:redhat:rhel_els:7
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Red Hat Red Hat Enterprise Linux 8 Unaffected: 8100020260904155442.25e700aa , < * (rpm)
    cpe:/a:redhat:enterprise_linux:8::appstream
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Red Hat Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support Unaffected: 8040020260901171549.96015a92 , < * (rpm)
    cpe:/a:redhat:rhel_aus:8.4::appstream
    cpe:/a:redhat:rhel_eus_long_life:8.4::appstream
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Red Hat Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On Unaffected: 8040020260901171549.96015a92 , < * (rpm)
    cpe:/a:redhat:rhel_aus:8.4::appstream
    cpe:/a:redhat:rhel_eus_long_life:8.4::appstream
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Red Hat Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support Unaffected: 8060020260901145727.824efc52 , < * (rpm)
    cpe:/a:redhat:rhel_aus:8.6::appstream
    cpe:/a:redhat:rhel_eus_long_life:8.6::appstream
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Red Hat Red Hat Enterprise Linux 8.6 Extended Update Support Long-Life Add-On Unaffected: 8060020260901145727.824efc52 , < * (rpm)
    cpe:/a:redhat:rhel_aus:8.6::appstream
    cpe:/a:redhat:rhel_eus_long_life:8.6::appstream
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Red Hat Red Hat Enterprise Linux 8.8 Telecommunications Update Service Unaffected: 8080020260831180218.6dbb3803 , < * (rpm)
    cpe:/a:redhat:rhel_e4s:8.8::appstream
    cpe:/a:redhat:rhel_tus:8.8::appstream
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Red Hat Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions Unaffected: 8080020260831180218.6dbb3803 , < * (rpm)
    cpe:/a:redhat:rhel_e4s:8.8::appstream
    cpe:/a:redhat:rhel_tus:8.8::appstream
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Red Hat Red Hat Enterprise Linux 9 Unaffected: 0:2.8.0-10.el9_8 , < * (rpm)
    cpe:/a:redhat:enterprise_linux:9::appstream
    cpe:/a:redhat:enterprise_linux:9::crb
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Red Hat Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions Unaffected: 0:2.2.4-22.el9_2 , < * (rpm)
    cpe:/a:redhat:rhel_e4s:9.2::appstream
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Red Hat Red Hat Enterprise Linux 9.4 Update Services for SAP Solutions Unaffected: 0:2.4.5-29.el9_4 , < * (rpm)
    cpe:/a:redhat:rhel_e4s:9.4::appstream
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Red Hat Red Hat Enterprise Linux 9.6 Extended Update Support Unaffected: 0:2.6.1-24.el9_6 , < * (rpm)
    cpe:/a:redhat:rhel_eus:9.6::appstream
    cpe:/a:redhat:rhel_eus:9.6::crb
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Red Hat Red Hat Directory Server 13.2 Unaffected: 1788851765 , < * (rpm)
    cpe:/a:redhat:directory_server:13.2::el10
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Red Hat Red Hat Directory Server 12     cpe:/a:redhat:directory_server:12
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Red Hat Red Hat Directory Server 13     cpe:/a:redhat:directory_server:13
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Red Hat Red Hat Enterprise Linux 6     cpe:/o:redhat:enterprise_linux:6
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Date Public
2026-09-07 09:00
Show details on NVD website

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CVE-2026-18064 (GCVE-0-2026-18064)

Vulnerability from cvelistv5 – Published: 2026-07-30 21:35 – Updated: 2026-07-31 15:41
VLAI
Title
NASA Core Flight System (cFS) Health & Safety (HS) Application NULL Pointer Dereference
Summary
An incomplete fix for CVE-2026-15352 in the NASA core Flight System (cFS) Health and Safety (HS) application leaves a separate NULL pointer dereference reachable in versions through 7.0.1. An attacker who can trigger the affected command under specific conditions could cause the HS application to crash, resulting in a denial-of-service condition and processor reset.
SSVC
Exploitation: none Automatable: yes Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-07-31 15:40 UTC
CWE
  • CWE-476 - NULL Pointer Dereference
Impacted products
Show details on NVD website

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CVE-2026-17574 (GCVE-0-2026-17574)

Vulnerability from cvelistv5 – Published: 2026-07-27 15:12 – Updated: 2026-07-27 18:36
VLAI
Title
NULL Pointer Dereference in HDF5 via Invalid Variable-Length Datatype Type Tag
Summary
HDF5 contains a NULL pointer dereference vulnerability. Processing a crafted HDF5 file containing an attribute with an invalid variable-length datatype type field may cause the application to crash when the attribute is read.
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-07-27 18:36 UTC
CWE
Impacted products
Vendor Product Version
The HDF Group HDF5 Affected: <= 2.1.1 (custom)
Create a notification for this product.
Show details on NVD website

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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.