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
2,669 results · Feed
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High 7.8
When Animate parses FLA files, there is a UAF vulnerability caused by referencing uninitialized memory at Animate.exe+0x1149dcf
Animate versions 24.0.2, 23.0.5 and earlier are affected by a NULL Pointer Dereference vulnerability that could result in arbitrary code execution in the context of the current user. Exploitation of this issue requires user interaction in that a victim must o…
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High 7.8
Win32k Elevation of Privilege Vulnerability
Win32k Elevation of Privilege Vulnerability
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Medium 6.5
An attacker who successfully exploited these vulnerabilities could cause the robot to stop, make the robot controller i…
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Low 3.3
A vulnerability has been identified in JT2Go (All versions < V2312.0005), Teamcenter Visualization V14.2 (All versions …
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High 7.5
TMM Vulnerability
When BIG-IP AFM is licensed and provisioned, undisclosed DNS 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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Low 3.3
Bluetooth Service has a use after free vulnerability
in OpenHarmony v4.0.0 and prior versions allow a local attacker cause service crash through NULL pointer dereference.
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Medium 5.2
Arkcompiler ets frontend has an out-of-bounds read vulnerability
in OpenHarmony v4.0.0 and prior versions allow a local attacker arbitrary code execution in pre-installed apps through use after free or cause DOS through NULL pointer dereference.
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Medium 5.9
nscd: Null pointer crashes after notfound response
nscd: Null pointer crashes after notfound response If the Name Service Cache Daemon's (nscd) cache fails to add a not-found netgroup response to the cache, the client request can result in a null pointer dereference. This flaw was introduced in glibc 2.15 whe…
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Medium 4.3
dcmnet in DCMTK before 3.6.9 has a segmentation fault via an invalid DIMSE message.
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Medium 6.5
Unified Automation UaGateway OPC UA Server Null Pointer Dereference Denial-of-Service Vulnerability
Unified Automation UaGateway OPC UA Server Null Pointer Dereference Denial-of-Service Vulnerability. This vulnerability allows remote attackers to create a denial-of-service condition on affected installations of Unified Automation UaGateway. Authentication i…
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High 7.5
Softing edgeConnector Siemens OPC UA Server Null Pointer Dereference Denial-of-Service Vulnerability
Softing edgeConnector Siemens OPC UA Server Null Pointer Dereference Denial-of-Service Vulnerability. This vulnerability allows remote attackers to create a denial-of-service condition on affected installations of Softing edgeConnector Siemens. Authentication…
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High 8.8
wifi: wilc1000: fix RCU usage in connect path
In the Linux kernel, the following vulnerability has been resolved: wifi: wilc1000: fix RCU usage in connect path With lockdep enabled, calls to the connect function from cfg802.11 layer lead to the following warning: ============================= WARNING: su…
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Medium 5.5
drm/amd/display: fix NULL checks for adev->dm.dc in amdgpu_dm_fini()
In the Linux kernel, the following vulnerability has been resolved: drm/amd/display: fix NULL checks for adev->dm.dc in amdgpu_dm_fini() Since 'adev->dm.dc' in amdgpu_dm_fini() might turn out to be NULL before the call to dc_enable_dmub_notifications(), check…
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Medium 5.5
clk: zynq: Prevent null pointer dereference caused by kmalloc failure
In the Linux kernel, the following vulnerability has been resolved: clk: zynq: Prevent null pointer dereference caused by kmalloc failure The kmalloc() in zynq_clk_setup() will return null if the physical memory has run out. As a result, if we use snprintf() …
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Medium 6.5
spi: spi-mt65xx: Fix NULL pointer access in interrupt handler
In the Linux kernel, the following vulnerability has been resolved: spi: spi-mt65xx: Fix NULL pointer access in interrupt handler The TX buffer in spi_transfer can be a NULL pointer, so the interrupt handler may end up writing to the invalid memory and cause …
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Unscored —
serial: max310x: fix NULL pointer dereference in I2C instantiation
In the Linux kernel, the following vulnerability has been resolved: serial: max310x: fix NULL pointer dereference in I2C instantiation When trying to instantiate a max14830 device from userspace: echo max14830 0x60 > /sys/bus/i2c/devices/i2c-2/new_device we g…
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High 7.5
In FRRouting (FRR) through 9.1, it is possible for the get_edge() function in ospf_te.c in the OSPF daemon to return a …
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Medium 5.3
simple-dhcp-server through ec976d2 allows remote attackers to cause a denial of service (daemon crash) by sending a DHC…
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Medium 5.3
The O-RAN E2T I-Release buildPrometheusList function can have a NULL pointer dereference because peerInfo can be NULL.
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Medium 6.5
D-Link DIR-823G A1V1.0.2B05 was found to contain a Null-pointer dereference in the main function of upload_firmware.cgi…
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Medium 6.2
sfc/siena: fix null pointer dereference in efx_hard_start_xmit
In the Linux kernel, the following vulnerability has been resolved: sfc/siena: fix null pointer dereference in efx_hard_start_xmit Like in previous patch for sfc, prevent potential (but unlikely) NULL pointer dereference.
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High 7.8
s390/dasd: fix Oops in dasd_alias_get_start_dev due to missing pavgroup
In the Linux kernel, the following vulnerability has been resolved: s390/dasd: fix Oops in dasd_alias_get_start_dev due to missing pavgroup Fix Oops in dasd_alias_get_start_dev() function caused by the pavgroup pointer being NULL. The pavgroup pointer is chec…
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High 7.6
cJSON v1.7.17 was discovered to contain a segmentation violation, which can trigger through the second parameter of fun…
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High 7.8
netfilter: nft_set_pipapo: do not free live element
In the Linux kernel, the following vulnerability has been resolved: netfilter: nft_set_pipapo: do not free live element Pablo reports a crash with large batches of elements with a back-to-back add/remove pattern. Quoting Pablo: add_elem("00000000") timeout 10…
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High 7.5
FreeRDP rdp_write_logon_info_v1 NULL access
FreeRDP is a free implementation of the Remote Desktop Protocol. FreeRDP based clients prior to version 3.5.1 are vulnerable to a possible `NULL` access and crash. Version 3.5.1 contains a patch for the issue. No known workarounds are available.
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Medium 5.5
Watchdog Antivirus v1.6.415 - Denial of Service
Watchdog Antivirus v1.6.415 is vulnerable to a Denial of Service vulnerability by triggering the 0x80002014 IOCTL code of the wsdk-driver.sys driver.
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High 7.5
QuickJS before c4cdd61 has a build_for_in_iterator NULL pointer dereference because of an erroneous lexical scope of "t…
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Medium 6.5
Wazuh vulnerable to NULL Pointer Dereference in wazuh-analysisd
Wazuh is a free and open source platform used for threat prevention, detection, and response. A NULL pointer dereference was detected during fuzzing of the analysis engine, allowing malicious clients to DoS the analysis engine. The bug occurs when `analysisd`…
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Medium 6.5
A Null Pointer Dereference vulnerability in WLAvalancheService component of Ivanti Avalanche before 6.4.3 allows an aut…
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Medium 6.5
A Null Pointer Dereference vulnerability in WLAvalancheService component of Ivanti Avalanche before 6.4.3 allows an aut…
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Medium 5.5
Bluetooth: rfcomm: Fix null-ptr-deref in rfcomm_check_security
In the Linux kernel, the following vulnerability has been resolved: Bluetooth: rfcomm: Fix null-ptr-deref in rfcomm_check_security During our fuzz testing of the connection and disconnection process at the RFCOMM layer, we discovered this bug. By comparing th…
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High 7.5
ice: fix uninitialized dplls mutex usage
In the Linux kernel, the following vulnerability has been resolved: ice: fix uninitialized dplls mutex usage The pf->dplls.lock mutex is initialized too late, after its first use. Move it to the top of ice_dpll_init. Note that the "err_exit" error path destro…
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Medium 5.3
NULL pointer deference in acpi_db_convert_to_package of Linux acpi module
The memory allocation function ACPI_ALLOCATE_ZEROED does not guarantee a successful allocation, but the subsequent code directly dereferences the pointer that receives it, which may lead to null pointer dereference. To fix this issue, a null pointer check sho…
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High 7.5
Null Pointer Dereference vulnerability in topic_filtern function in mqtt_parser.c in NanoMQ 0.21.7 allows attackers to …
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Medium 6.5
net-snmp: A malformed OID in a SET to the nsVacmAccessTable can cause a NULL pointer dereference.
net-snmp provides various tools relating to the Simple Network Management Protocol. Prior to version 5.9.2, a user with read-write credentials can use a malformed OID in a SET to the nsVacmAccessTable to cause a NULL pointer dereference. Version 5.9.2 contain…
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Medium 6.5
net-snmp: A malformed OID in a SET request to NET-SNMP-AGENT-MIB::nsLogTable can cause a NULL pointer dereference
net-snmp provides various tools relating to the Simple Network Management Protocol. Prior to version 5.9.2, a user with read-only credentials can use a malformed OID in a `GET-NEXT` to the `nsVacmAccessTable` to cause a NULL pointer dereference. Version 5.9.2…
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Medium 6.5
net-snmp: A malformed OID in a SET request to NET-SNMP-AGENT-MIB::nsLogTable can cause a NULL pointer dereference
net-snmp provides various tools relating to the Simple Network Management Protocol. Prior to version 5.9.2, a user with read-write credentials can use a malformed OID in a `SET` request to `NET-SNMP-AGENT-MIB::nsLogTable` to cause a NULL pointer dereference. …
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High 7.5
Micrium OS Network uC-HTTP server header parsing invalid pointer dereference vulnerability
A bug in Micrium OS Network HTTP Server permits an invalid pointer dereference during header processing - potentially allowing a device crash and Denial of Service.
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High 7.5
It was possible to mutate a JavaScript object so that the JIT could crash while tracing it. This vulnerability affects …
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Medium 6.5
Junos OS Evolved: When MAC learning happens, and an interface gets flapped, the PFE crashes
A NULL Pointer Dereference vulnerability in the Packet Forwarding Engine (PFE) of Juniper Networks Junos OS Evolved allows an unauthenticated, adjacent attacker to cause a Denial of Service (DoS). When Layer 2 traffic is sent through a logical interface, MAC …