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
1,548 results · Clear filters · Feed
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Medium 6.2
media: vidtv: psi: Add check for kstrdup
In the Linux kernel, the following vulnerability has been resolved: media: vidtv: psi: Add check for kstrdup Add check for the return value of kstrdup() and return the error if it fails in order to avoid NULL pointer dereference.
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Medium 5.5
drm/amdgpu: Fix a null pointer access when the smc_rreg pointer is NULL
In the Linux kernel, the following vulnerability has been resolved: drm/amdgpu: Fix a null pointer access when the smc_rreg pointer is NULL In certain types of chips, such as VEGA20, reading the amdgpu_regs_smc file could result in an abnormal null pointer ac…
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Medium 5.5
drm/amdgpu: Fix potential null pointer derefernce
In the Linux kernel, the following vulnerability has been resolved: drm/amdgpu: Fix potential null pointer derefernce The amdgpu_ras_get_context may return NULL if device not support ras feature, so add check before using.
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Medium 6.2
mfd: qcom-spmi-pmic: Fix revid implementation
In the Linux kernel, the following vulnerability has been resolved: mfd: qcom-spmi-pmic: Fix revid implementation The Qualcomm SPMI PMIC revid implementation is broken in multiple ways. First, it assumes that just because the sibling base device has been regi…
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Medium 5.5
s390/qeth: fix NULL deref in qeth_clear_working_pool_list()
In the Linux kernel, the following vulnerability has been resolved: s390/qeth: fix NULL deref in qeth_clear_working_pool_list() When qeth_set_online() calls qeth_clear_working_pool_list() to roll back after an error exit from qeth_hardsetup_card(), we are at …
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Medium 5.5
netfilter: nf_tables: Fix dereference of null pointer flow
In the Linux kernel, the following vulnerability has been resolved: netfilter: nf_tables: Fix dereference of null pointer flow In the case where chain->flags & NFT_CHAIN_HW_OFFLOAD is false then nft_flow_rule_create is not called and flow is NULL. The subsequ…
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Medium 5.5
net: ieee802154: fix null deref in parse dev addr
In the Linux kernel, the following vulnerability has been resolved: net: ieee802154: fix null deref in parse dev addr Fix a logic error that could result in a null deref if the user sets the mode incorrectly for the given addr type.
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Medium 6.6
KVM: x86: Immediately reset the MMU context when the SMM flag is cleared
In the Linux kernel, the following vulnerability has been resolved: KVM: x86: Immediately reset the MMU context when the SMM flag is cleared Immediately reset the MMU context when the vCPU's SMM flag is cleared so that the SMM flag in the MMU role is always s…
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Medium 5.0
taurusxin ncmdump v1.3.2 was discovered to contain a segmentation violation via the NeteaseCrypt::FixMetadata() functio…
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Medium 5.5
pstore/zone: Add a null pointer check to the psz_kmsg_read
In the Linux kernel, the following vulnerability has been resolved: pstore/zone: Add a null pointer check to the psz_kmsg_read kasprintf() returns a pointer to dynamically allocated memory which can be NULL upon failure. Ensure the allocation was successful b…
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Medium 5.3
of: module: prevent NULL pointer dereference in vsnprintf()
In the Linux kernel, the following vulnerability has been resolved: of: module: prevent NULL pointer dereference in vsnprintf() In of_modalias(), we can get passed the str and len parameters which would cause a kernel oops in vsnprintf() since it only allows …
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Medium 5.0
NULL pointer dereference in Intel(R) Power Gadget software for Windows all versions may allow an authenticated user to …
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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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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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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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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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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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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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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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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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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 …
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Medium 5.5
Adobe Animate 2024 WAV File Parsing Null Pointer Dereference
Animate versions 23.0.4, 24.0.1 and earlier are affected by a NULL Pointer Dereference vulnerability that could lead to an application denial-of-service. An attacker could leverage this vulnerability to cause a system crash, resulting in a denial of service. …
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Medium 5.3
Time4J Base v5.9.3 was discovered to contain a NullPointerException via the component net.time4j.format.internal.Format…
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Medium 6.5
Windows Kerberos Denial of Service Vulnerability
Windows Kerberos Denial of Service Vulnerability
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Medium 5.3
In modem-ps-nas-ngmm, there is a possible undefined behavior due to incorrect error handling. This could lead to remote…
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Medium 5.5
In asn1_ec_pkey_parse_p384 of asn1_common.c, there is a possible OOB Read due to a missing null check. This could lead …
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Medium 5.5
In asn1_ec_pkey_parse of asn1_common.c, there is a possible OOB read due to a missing null check. This could lead to lo…