Weakness (CWE)
CWE-476: NULL Pointer Dereference
The product dereferences a pointer that it expects to be valid but is NULL.
How to prevent it (5 mitigations)
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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].
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Requirements
Select a programming language that is not susceptible to these issues.
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Implementation
Check the results of all functions that return a value and verify that the value is non-null before acting upon it.
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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.
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Implementation
Explicitly initialize all variables and other data stores, either during declaration or just before the first usage.
Source: MITRE CWE-476
746 results · Clear filters · Feed
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High 7.5
A NULL pointer dereference in the sub_41773C function of TOTOLINK N600R v4.3.0cu.7866_B20220506 allows attackers to cau…
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High 7.5
A NULL pointer dereference in the main function of TOTOLINK N600R v4.3.0cu.7866_B20220506 allows attackers to cause a D…
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High 7.5
A NULL pointer dereference in the SetWLanRadioSettings function of D-Link DIR-823G A1 v1.0.2B05 allows attackers to cau…
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High 7.1
Icinga 2 Denial of Service (DoS) By Dereferencing Invalid Reference
Icinga 2 is an open source monitoring system. From 2.10.0 to before 2.15.1, 2.14.7, and 2.13.13, when creating an invalid reference, such as a reference to null, dereferencing results in a segmentation fault. This can be used by any API user with access to an…
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High 7.5
BIG-IP APM portal access vulnerability
When a per-request policy is configured on a BIG-IP APM portal access virtual server, undisclosed traffic can cause the Traffic Management Microkernel (TMM) to terminate. Note: Software versions which have reached End of Technical Support (EoTS) are not eval…
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High 7.5
BIG-IP Next (CNF, SPK, and Kubernetes) vulnerability
When HTTP/2 Ingress is configured, undisclosed traffic can cause the Traffic Management Microkernel (TMM) to terminate. Note: Software versions which have reached End of Technical Support (EoTS) are not evaluated.
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High 7.7
DirectX Graphics Kernel Denial of Service Vulnerability
Null pointer dereference in Windows DirectX allows an authorized attacker to deny service over a network.
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High 8.7
@plone/volto vulnerable to potential DoS by invoking specific URL by anonymous user
Volto is a ReactJS-based frontend for the Plone Content Management System. Versions 16.34.0 and below, 17.0.0 through 17.22.1, 18.0.0 through 18.27.1, and 19.0.0-alpha.1 through 19.0.0-alpha.5, an anonymous user could cause the NodeJS server part of Volto to …
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High 7.5
argo-cd is vulnerable to unauthenticated DoS attack via malformed Gogs webhook payload
Argo CD is a declarative, GitOps continuous delivery tool for Kubernetes. Versions 1.2.0 through 1.8.7, 2.0.0-rc1 through 2.14.19, 3.0.0-rc1 through 3.2.0-rc1, 3.1.7 and 3.0.18 are vulnerable to malicious API requests which can crash the API server and cause …
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High 7.5
Suricata: Keyword tls.subjectaltname can lead to NULL-ptr deref
Suricata is a network IDS, IPS and NSM engine developed by the OISF (Open Information Security Foundation) and the Suricata community. Version 8.0.0's usage of the tls.subjectaltname keyword can lead to a segmentation fault when the decoded subjectaltname con…
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High 7.5
Suricata's improper use of entropy keyword can lead to a NULL-ptr deref
Suricata is a network IDS, IPS and NSM engine developed by the OISF (Open Information Security Foundation) and the Suricata community. Versions 8.0.0 and below incorrectly handle the entropy keyword when not anchored to a "sticky" buffer, which can lead to a …
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High 7.8
drm/amd/display: remove oem i2c adapter on finish
In the Linux kernel, the following vulnerability has been resolved: drm/amd/display: remove oem i2c adapter on finish Fixes a bug where unbinding of the GPU would leave the oem i2c adapter registered resulting in a null pointer dereference when applications t…
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High 7.5
net: xilinx: axienet: Add error handling for RX metadata pointer retrieval
In the Linux kernel, the following vulnerability has been resolved: net: xilinx: axienet: Add error handling for RX metadata pointer retrieval Add proper error checking for dmaengine_desc_get_metadata_ptr() which can return an error pointer and lead to potent…
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High 7.5
Multiple versions of Central Monitor CNS-6201 contain a NULL pointer dereference vulnerability. When processing a craft…
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High 7.5CVE-2025-55780 Public exploit
A null pointer dereference occurs in the function break_word_for_overflow_wrap() in MuPDF 1.26.4 when rendering a malfo…
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High 7.5
vxlan: Fix NPD when refreshing an FDB entry with a nexthop object
In the Linux kernel, the following vulnerability has been resolved: vxlan: Fix NPD when refreshing an FDB entry with a nexthop object VXLAN FDB entries can point to either a remote destination or an FDB nexthop group. The latter is usually used in EVPN deploy…
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High 7.8
nilfs2: fix sysfs interface lifetime
In the Linux kernel, the following vulnerability has been resolved: nilfs2: fix sysfs interface lifetime The current nilfs2 sysfs support has issues with the timing of creation and deletion of sysfs entries, potentially leading to null pointer dereferences, u…
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High 7.8
net/tunnel: wait until all sk_user_data reader finish before releasing the sock
In the Linux kernel, the following vulnerability has been resolved: net/tunnel: wait until all sk_user_data reader finish before releasing the sock There is a race condition in vxlan that when deleting a vxlan device during receiving packets, there is a possi…
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High 7.5
ksmbd: fix NULL pointer dereference in smb2_get_info_filesystem()
In the Linux kernel, the following vulnerability has been resolved: ksmbd: fix NULL pointer dereference in smb2_get_info_filesystem() If share is , share->path is NULL and it cause NULL pointer dereference issue.
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High 7.8
skbuff: skb_segment, Call zero copy functions before using skbuff frags
In the Linux kernel, the following vulnerability has been resolved: skbuff: skb_segment, Call zero copy functions before using skbuff frags Commit bf5c25d60861 ("skbuff: in skb_segment, call zerocopy functions once per nskb") added the call to zero copy funct…
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High 7.5
RDMA/cxgb4: Fix potential null-ptr-deref in pass_establish()
In the Linux kernel, the following vulnerability has been resolved: RDMA/cxgb4: Fix potential null-ptr-deref in pass_establish() If get_ep_from_tid() fails to lookup non-NULL value for ep, ep is dereferenced later regardless of whether it is empty. This patch…
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High 7.8
drm/amdkfd: Fix kfd_process_device_init_vm error handling
In the Linux kernel, the following vulnerability has been resolved: drm/amdkfd: Fix kfd_process_device_init_vm error handling Should only destroy the ib_mem and let process cleanup worker to free the outstanding BOs. Reset the pointer in pdd->qpd structure, t…
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High 7.3
A null pointer dereference vulnerability was discovered in SumatraPDF 3.5.2 during the processing of a crafted .djvu fi…
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High 7.5
Arm issues with page refcounting
[This CNA information record relates to multiple CVEs; the text explains which aspects/vulnerabilities correspond to which CVE.] There are two issues related to the mapping of pages belonging to other domains: For one, an assertion is wrong there, where the c…
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High 8.2
Rockwell Automation ControlLogix® 5580 V35.013 Denial-Of-Service
A denial-of-service security issue exists in the affected product and version. The security issue stems from the controller repeatedly attempting to forward messages. The issue could result in a major nonrecoverable fault on the controller.
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High 7.5
In TBD of TBD, there is a possible DoS due to a missing null check. This could lead to remote denial of service with no…
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High 7.8
NULL Pointer Dereference in Wireshark
SSH dissector crash in Wireshark 4.4.0 to 4.4.8 allows denial of service
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High 7.5
An issue was discovered in rust-ffmpeg 0.3.0 (after comit 5ac0527) An integer overflow vulnerability in the Vector::new…
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High 7.5
An issue was discovered in rust-ffmpeg 0.3.0 (after comit 5ac0527) A null pointer dereference vulnerability in the inpu…
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High 7.5
An issue was discovered in rust-ffmpeg 0.3.0 (after comit 5ac0527) Null pointer dereference vulnerability in the name()…
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High 7.1
File Station 5
A NULL pointer dereference vulnerability has been reported to affect File Station 5. If a remote attacker gains a user account, they can then exploit the vulnerability to launch a denial-of-service (DoS) attack. We have already fixed the vulnerability in the …
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High —
Versity panic induced by AWS chunked data sent to port
Sending AWS chunk data with no Content-Length HTTP header causes the panic, every time. ### Reproduction Setup versity server running on port 7071, no SSL (for ease of packet tracing with tshark). Problem can be reproduced with or without SSL on the versity e…
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High 7.5
Kea crash upon interaction between specific client options and subnet selection
If a DHCPv4 client sends a request with some specific options, and Kea fails to find an appropriate subnet for the client, the `kea-dhcp4` process will abort with an assertion failure. This happens only if the client request is unicast directly to Kea; broadc…
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High 7.1
File Station 5
A NULL pointer dereference vulnerability has been reported to affect File Station 5. If a remote attacker gains a user account, they can then exploit the vulnerability to launch a denial-of-service (DoS) attack. We have already fixed the vulnerability in the …
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High 7.5
BIG-IP Client SSL profile vulnerability
When a BIG-IP LTM Client SSL profile is configured on a virtual server with SSL Forward Proxy enabled and Anonymous Diffie-Hellman (ADH) ciphers enabled, undisclosed requests can cause the Traffic Management Microkernel (TMM) to terminate. Note: Software vers…
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High 7.5
A null pointer dereference vulnerability was discovered in Netis WF2780 v2.2.35445. The vulnerability exists in the FUN…
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High 7.8
Windows Ancillary Function Driver for WinSock Elevation of Privilege Vulnerability
Null pointer dereference in Windows Ancillary Function Driver for WinSock allows an authorized attacker to elevate privileges locally.
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High 7.8
Windows Ancillary Function Driver for WinSock Elevation of Privilege Vulnerability
Null pointer dereference in Windows Ancillary Function Driver for WinSock allows an authorized attacker to elevate privileges locally.
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High 7.5
CODESYS Control DoS via Unauthenticated NULL Pointer Dereference
An unauthenticated remote attacker may trigger a NULL pointer dereference in the affected CODESYS Control runtime systems by sending specially crafted communication requests, potentially leading to a denial-of-service (DoS) condition.
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High 7.5
NULL Pointer Dereference in µD3TN
NULL Pointer Dereference in µD3TN via non-singleton destination Endpoint Identifier allows remote attacker to reliably cause DoS