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.

6731 vulnerabilities reference this CWE, most recent first.

CVE-2026-55209 (GCVE-0-2026-55209)

Vulnerability from cvelistv5 – Published: 2026-09-14 19:52 – Updated: 2026-09-14 20:11
VLAI
Title
resdata insufficiently validates untrusted GRDECL files
Summary
resdata is software for reading and writing result files from the Eclipse reservoir simulator. Prior to 6.2.9, resdata insufficiently validates numeric fields, grid dimensions, keyword sizes, and array indexes while parsing untrusted GRDECL files in lib/resdata/rd_kw_grdecl.cpp and lib/resdata/rd_grid.cpp. Malformed COORD, ZCORN, CORSNUM, ACTNUM, or MAPAXES data can reach rd_grid_alloc_GRDECL_kw__ with inconsistent lengths, while unbounded floating-point conversion can exceed the intended parser buffer. In a network service that accepts untrusted GRDECL files, these conditions can cause a classic buffer overflow, out-of-bounds reads, invalid array access, NULL pointer dereference, memory corruption, or service termination. This issue is fixed in version 6.2.9.
SSVC
Exploitation: none Automatable: yes Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-14 20:10 UTC
CWE
  • CWE-120 - Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')
  • CWE-125 - Out-of-bounds Read
  • CWE-129 - Improper Validation of Array Index
  • CWE-476 - NULL Pointer Dereference
Impacted products
Vendor Product Version
equinor resdata Affected: < 6.2.9
Create a notification for this product.
Show details on NVD website

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CVE-2026-55204 (GCVE-0-2026-55204)

Vulnerability from cvelistv5 – Published: 2026-06-18 16:05 – Updated: 2026-07-14 21:33 X_Open Source
VLAI
Title
HAProxy - NULL Pointer Dereference in hpack_dht_insert Function
Summary
HAProxy through 3.4.0, fixed in commit 9a6d1fe, contains a null pointer dereference vulnerability in hpack_dht_insert() within src/hpack-tbl.c that fails to validate the return value of hpack_dht_defrag() when the memory pool is exhausted. An attacker can trigger HPACK dynamic table insertions under memory pressure to dereference a NULL pointer and crash HAProxy worker processes, causing denial of service.
SSVC
Exploitation: none Automatable: yes Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-06-18 17:26 UTC
CWE
  • CWE-476 - NULL Pointer Dereference
Impacted products
Vendor Product Version
haproxy haproxy Affected: 0 , ≤ 3.4.0 (semver)
Unaffected: 9a6d1fe3f00d86ab4ea6ea6ea0a5d48fc058a513 (git)
    cpe:2.3:a:haproxy:aloha:*:*:*:*:*:*:*:*
Create a notification for this product.
Date Public
2026-06-16 00:00
Show details on NVD website

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CVE-2026-54084 (GCVE-0-2026-54084)

Vulnerability from cvelistv5 – Published: 2026-08-27 23:12 – Updated: 2026-08-28 15:27
VLAI
Title
Wazuh agent enrollment NULL pointer dereference via malformed manager response
Summary
Wazuh is an open-source security platform providing unified XDR and SIEM protection for endpoints and cloud workloads. In versions 4.0.0 through 4.14.6, a malicious or man-in-the-middle enrollment manager can crash a Wazuh agent during enrollment by returning a malformed key response with fewer than four fields, causing a NULL pointer dereference. The  w_enrollment_process_agent_key()  routine splits the manager-provided key into four space-separated fields but does not verify that all fields are present before passing them to validators. Because OS_StrBreak() leaves missing trailing entries as NULL and OS_IsValidName() calls strlen() on its argument without a NULL check, a response such as  OSSEC K:'1'  reaches OS_IsValidName(NULL) and terminates the agent process. Since Wazuh permits enrollment against an unverified manager when no CA certificate is configured, an attacker operating a rogue manager or intercepting the enrollment flow can deterministically crash agents, resulting in denial of service. This issue is fixed in version 4.14.7.
SSVC
Exploitation: poc Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-28 15:27 UTC
CWE
  • CWE-476 - NULL Pointer Dereference
References
Impacted products
Vendor Product Version
wazuh wazuh Affected: >= 4.0.0, < 4.14.7
Create a notification for this product.
Show details on NVD website

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CVE-2026-53719 (GCVE-0-2026-53719)

Vulnerability from cvelistv5 – Published: 2026-09-14 20:13 – Updated: 2026-09-16 18:10
VLAI
Title
Envoy Gateway: Nil-dereference when SecurityPolicy targets TCPRoute without spec.authorization
Summary
Envoy Gateway is an open source project for managing Envoy Proxy as a standalone or Kubernetes-based application gateway. Prior to 1.7.4 and 1.8.1, translateSecurityPolicyForRoute in internal/gatewayapi/securitypolicy.go dereferences a nil authorization value when a namespace-scoped tenant creates a SecurityPolicy targeting a TCPRoute and omits spec.authorization. The persistent object triggers the panic on every reconcile; recovery in message/watchutil.go keeps the process alive but unwinds the runner/runner.go handle callback, stalling controller-wide xDS and infrastructure intermediate-representation publishing until an administrator deletes the object. The data plane continues to serve the last known good configuration while publication is stalled. This issue is fixed in versions 1.7.4 and 1.8.1.
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-16 18:10 UTC
CWE
  • CWE-476 - NULL Pointer Dereference
Impacted products
Vendor Product Version
envoyproxy gateway Affected: < 1.7.4
Affected: >= 1.8.0-rc.0, < 1.8.1
Create a notification for this product.
Show details on NVD website

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CVE-2026-53463 (GCVE-0-2026-53463)

Vulnerability from cvelistv5 – Published: 2026-06-10 22:05 – Updated: 2026-06-11 12:56
VLAI
Title
ImageMagick: Null Pointer Dereference in distort operation when passing incorrect arguments
Summary
ImageMagick is free and open-source software used for editing and manipulating digital images. Prior to versions 6.9.13-50 and 7.1.2-25, when passing incorrect arguments in the distort operation a null pointer deference will occur. This issue has been patched in versions 6.9.13-50 and 7.1.2-25.
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-06-11 12:56 UTC
CWE
  • CWE-476 - NULL Pointer Dereference
References
Impacted products
Vendor Product Version
ImageMagick ImageMagick Affected: < 6.9.13-50
Affected: < 7.1.2-25
Create a notification for this product.
Show details on NVD website

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CVE-2026-52878 (GCVE-0-2026-52878)

Vulnerability from cvelistv5 – Published: 2026-08-07 22:32 – Updated: 2026-08-10 14:16
VLAI
Title
Klever-Go: Unauthenticated nil-pointer DoS in P2P transaction validation can halt the chain
Summary
Klever-Go is the Go implementation of the Klever blockchain protocol. Versions 1.7.14 through 1.7.17 are vulnerable to a nil-pointer panic triggered by a protobuf Transaction whose embedded RawData sub-message is omitted. This omission causes RawData to decode to nil. Every transaction gossiped on the Klever-Go P2P network is decoded and validated synchronously inside the libp2p pubsub topic-validator callback, where txVersionChecker.CheckTxVersion dereferences tx.RawData.Version with no nil check. Because the libp2p pubsub callback, the underlying go-libp2p-pubsub validation worker, and Klever's own network/p2p layer install no recover(), the panic propagates and crashes the entire node process. The attacker payload is a 3-byte protobuf message; no validator key, stake, funds, or on-chain account is required, and delivery aimed at enough of the BLS validator set can halt block production, resulting in a chain halt. This issue has been fixed in version 1.7.18.
SSVC
Exploitation: poc Automatable: yes Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-10 14:09 UTC
CWE
  • CWE-476 - NULL Pointer Dereference
References
Impacted products
Vendor Product Version
klever-io klever-go Affected: >= 1.7.14, < 1.7.18
Create a notification for this product.
Show details on NVD website

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CVE-2026-52865 (GCVE-0-2026-52865)

Vulnerability from cvelistv5 – Published: 2026-07-15 14:33 – Updated: 2026-07-15 15:36
VLAI
Title
NGINX Ingress Controller vulnerability
Summary
When NGINX Ingress Controller processes Ingress or TransportServer resources, an authenticated, remote attacker with permission to create or modify Ingress or TransportServer resources can cause the NGINX Ingress Controller process to terminate. Impact: The NGINX Ingress Controller control plane process terminates and enters a persistent crash loop while the malformed Ingress or TransportServer resource remains in the cluster. This vulnerability allows a remote, authenticated attacker with at least Ingress or TransportServer resource write access to cause a denial-of-service (DoS) on the NGINX Ingress Controller system. There is no data plane exposure; this is a control plane issue only. Note: Software versions which have reached End of Technical Support (EoTS) are not evaluated.
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-07-15 15:36 UTC
CWE
  • CWE-476 - NULL Pointer Dereference
References
URL Tags
https://my.f5.com/manage/s/article/K000161834 vendor-advisorypatch
Impacted products
Vendor Product Version
F5 NGINX Ingress Controller Affected: 5.0.0 , < 5.5.2 (custom)
Affected: 2026-lts-r1 , < 2026-lts-r3 (custom)
Create a notification for this product.
Date Public
2026-07-15 14:00
Credits
Show details on NVD website

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          "url": "https://my.f5.com/manage/s/article/K000161834"
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CVE-2026-50673 (GCVE-0-2026-50673)

Vulnerability from cvelistv5 – Published: 2026-07-14 17:08 – Updated: 2026-09-25 18:23
VLAI
Title
Windows Kernel Elevation of Privilege Vulnerability
Summary
Null pointer dereference in Windows Kernel allows an authorized attacker to elevate privileges locally.
SSVC
Exploitation: none Automatable: no Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-07-15 03:56 UTC
CWE
  • CWE-476 - NULL Pointer Dereference
  • CWE-367 - Time-of-check Time-of-use (TOCTOU) Race Condition
References
Impacted products
Vendor Product Version
Microsoft Windows 10 Version 1607 Affected: 10.0.14393.0 , < 10.0.14393.9339 (custom)
Create a notification for this product.
Microsoft Windows 10 Version 1809 Affected: 10.0.17763.0 , < 10.0.17763.9020 (custom)
Create a notification for this product.
Microsoft Windows 10 Version 21H2 Affected: 10.0.19044.0 , < 10.0.19044.7548 (custom)
Create a notification for this product.
Microsoft Windows 10 Version 22H2 Affected: 10.0.19045.0 , < 10.0.19045.7548 (custom)
Create a notification for this product.
Microsoft Windows 11 Version 24H2 Affected: 10.0.26100.0 , < 10.0.26100.8875 (custom)
Create a notification for this product.
Microsoft Windows 11 Version 25H2 Affected: 10.0.26200.0 , < 10.0.26200.8875 (custom)
Create a notification for this product.
Microsoft Windows 11 version 26H1 Affected: 10.0.28000.0 , < 10.0.28000.2525 (custom)
Create a notification for this product.
Microsoft Windows Server 2012 Affected: 6.2.9200.0 , < 6.2.9200.26226 (custom)
Create a notification for this product.
Microsoft Windows Server 2012 (Server Core installation) Affected: 6.2.9200.0 , < 6.2.9200.26226 (custom)
Create a notification for this product.
Microsoft Windows Server 2012 R2 Affected: 6.3.9600.0 , < 6.3.9600.23291 (custom)
Create a notification for this product.
Microsoft Windows Server 2012 R2 (Server Core installation) Affected: 6.3.9600.0 , < 6.3.9600.23291 (custom)
Create a notification for this product.
Microsoft Windows Server 2016 Affected: 10.0.14393.0 , < 10.0.14393.9339 (custom)
Create a notification for this product.
Microsoft Windows Server 2016 (Server Core installation) Affected: 10.0.14393.0 , < 10.0.14393.9339 (custom)
Create a notification for this product.
Microsoft Windows Server 2019 Affected: 10.0.17763.0 , < 10.0.17763.9020 (custom)
Create a notification for this product.
Microsoft Windows Server 2019 (Server Core installation) Affected: 10.0.17763.0 , < 10.0.17763.9020 (custom)
Create a notification for this product.
Microsoft Windows Server 2022 Affected: 10.0.20348.0 , < 10.0.20348.5386 (custom)
Create a notification for this product.
Microsoft Windows Server 2025 Affected: 10.0.26100.0 , < 10.0.26100.33158 (custom)
Create a notification for this product.
Microsoft Windows Server 2025 (Server Core installation) Affected: 10.0.26100.0 , < 10.0.26100.33158 (custom)
Create a notification for this product.
Date Public
2026-07-14 14:00
Show details on NVD website

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CVE-2026-50366 (GCVE-0-2026-50366)

Vulnerability from cvelistv5 – Published: 2026-07-14 17:06 – Updated: 2026-09-25 18:22
VLAI
Title
Windows Active Directory Domain Services Denial of Service Vulnerability
Summary
Null pointer dereference in Active Directory Domain Services allows an authorized attacker to deny service over a network.
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-07-14 20:36 UTC
CWE
  • CWE-476 - NULL Pointer Dereference
References
Impacted products
Vendor Product Version
Microsoft Windows 10 Version 1607 Affected: 10.0.14393.0 , < 10.0.14393.9339 (custom)
Create a notification for this product.
Microsoft Windows 10 Version 1809 Affected: 10.0.17763.0 , < 10.0.17763.9020 (custom)
Create a notification for this product.
Microsoft Windows 10 Version 21H2 Affected: 10.0.19044.0 , < 10.0.19044.7548 (custom)
Create a notification for this product.
Microsoft Windows 10 Version 22H2 Affected: 10.0.19045.0 , < 10.0.19045.7548 (custom)
Create a notification for this product.
Microsoft Windows 11 Version 24H2 Affected: 10.0.26100.0 , < 10.0.26100.8875 (custom)
Create a notification for this product.
Microsoft Windows 11 Version 25H2 Affected: 10.0.26200.0 , < 10.0.26200.8875 (custom)
Create a notification for this product.
Microsoft Windows 11 version 26H1 Affected: 10.0.28000.0 , < 10.0.28000.2525 (custom)
Create a notification for this product.
Microsoft Windows Server 2012 Affected: 6.2.9200.0 , < 6.2.9200.26226 (custom)
Create a notification for this product.
Microsoft Windows Server 2012 (Server Core installation) Affected: 6.2.9200.0 , < 6.2.9200.26226 (custom)
Create a notification for this product.
Microsoft Windows Server 2012 R2 Affected: 6.3.9600.0 , < 6.3.9600.23291 (custom)
Create a notification for this product.
Microsoft Windows Server 2012 R2 (Server Core installation) Affected: 6.3.9600.0 , < 6.3.9600.23291 (custom)
Create a notification for this product.
Microsoft Windows Server 2016 Affected: 10.0.14393.0 , < 10.0.14393.9339 (custom)
Create a notification for this product.
Microsoft Windows Server 2016 (Server Core installation) Affected: 10.0.14393.0 , < 10.0.14393.9339 (custom)
Create a notification for this product.
Microsoft Windows Server 2019 Affected: 10.0.17763.0 , < 10.0.17763.9020 (custom)
Create a notification for this product.
Microsoft Windows Server 2019 (Server Core installation) Affected: 10.0.17763.0 , < 10.0.17763.9020 (custom)
Create a notification for this product.
Microsoft Windows Server 2022 Affected: 10.0.20348.0 , < 10.0.20348.5386 (custom)
Create a notification for this product.
Microsoft Windows Server 2025 Affected: 10.0.26100.0 , < 10.0.26100.33158 (custom)
Create a notification for this product.
Microsoft Windows Server 2025 (Server Core installation) Affected: 10.0.26100.0 , < 10.0.26100.33158 (custom)
Create a notification for this product.
Date Public
2026-07-14 14:00
Show details on NVD website

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CVE-2026-50315 (GCVE-0-2026-50315)

Vulnerability from cvelistv5 – Published: 2026-07-14 17:06 – Updated: 2026-09-25 18:21
VLAI
Title
Windows Image Acquisition Elevation of Privilege Vulnerability
Summary
Null pointer dereference in Windows Image Acquisition allows an authorized attacker to elevate privileges locally.
SSVC
Exploitation: none Automatable: no Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-07-22 00:00 UTC
CWE
  • CWE-476 - NULL Pointer Dereference
References
Impacted products
Vendor Product Version
Microsoft Windows 11 Version 24H2 Affected: 10.0.26100.0 , < 10.0.26100.8875 (custom)
Create a notification for this product.
Microsoft Windows 11 Version 25H2 Affected: 10.0.26200.0 , < 10.0.26200.8875 (custom)
Create a notification for this product.
Microsoft Windows 11 version 26H1 Affected: 10.0.28000.0 , < 10.0.28000.2525 (custom)
Create a notification for this product.
Microsoft Windows Server 2025 Affected: 10.0.26100.0 , < 10.0.26100.33158 (custom)
Create a notification for this product.
Microsoft Windows Server 2025 (Server Core installation) Affected: 10.0.26100.0 , < 10.0.26100.33158 (custom)
Create a notification for this product.
Date Public
2026-07-14 14:00
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.