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
747 results · Clear filters · Feed
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High 7.5
xprtrdma: treat all calls not a bcall when bc_serv is NULL
In the Linux kernel, the following vulnerability has been resolved: xprtrdma: treat all calls not a bcall when bc_serv is NULL When a rdma server returns a fault format reply, nfs v3 client may treats it as a bcall when bc service is not exist. The debug mess…
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High 7.0
nbd: call genl_unregister_family() first in nbd_cleanup()
In the Linux kernel, the following vulnerability has been resolved: nbd: call genl_unregister_family() first in nbd_cleanup() Otherwise there may be race between module removal and the handling of netlink command, which can lead to the oops as shown below: BU…
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High 7.8
xsk: Fix race at socket teardown
In the Linux kernel, the following vulnerability has been resolved: xsk: Fix race at socket teardown Fix a race in the xsk socket teardown code that can lead to a NULL pointer dereference splat. The current xsk unbind code in xsk_unbind_dev() starts by settin…
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High 7.8
net: sfc: add missing xdp queue reinitialization
In the Linux kernel, the following vulnerability has been resolved: net: sfc: add missing xdp queue reinitialization After rx/tx ring buffer size is changed, kernel panic occurs when it acts XDP_TX or XDP_REDIRECT. When tx/rx ring buffer size is changed(ethto…
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High 7.5
SUNRPC: Fix the svc_deferred_event trace class
In the Linux kernel, the following vulnerability has been resolved: SUNRPC: Fix the svc_deferred_event trace class Fix a NULL deref crash that occurs when an svc_rqst is deferred while the sunrpc tracing subsystem is enabled. svc_revisit() sets dr->xprt to NU…
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High 7.5
An issue was discovered in Fluent Bit 3.1.9. When the Prometheus Remote Write input plugin is running and listening on …
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High 7.5
An issue was discovered in Fluent Bit 3.1.9. When the OpenTelemetry input plugin is running and listening on an IP addr…
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High 7.5
A NULL pointer dereference in the component /libsrc/dcrleccd.cc of DCMTK v3.6.9+ DEV allows attackers to cause a Denial…
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High 7.5
Mercedes-Benz head-unit NTG6 contains functions to import or export profile settings over USB. Some values of this tabl…
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High 7.5
Mercedes-Benz head-unit NTG6 contains functions to import or export profile settings over USB. In case of parsing file,…
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High 7.4
NULL pointer dereference in some Intel(R) PROSet/Wireless WiFi and Killerâ„¢ WiFi software for Windows before version 2…
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High 7.9
NULL pointer dereference for some Intel(R) MLC software before version v3.11b may allow an authenticated user to potent…
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High 7.5
An issue was discovered in Samsung Mobile Processor Exynos 1480 and 2400. The absence of a null check leads to a Denial…
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High 7.5
BIG-IP SIP MRF Vulnerability
When SIP session Application Level Gateway mode (ALG) profile with Passthru Mode enabled and SIP router ALG profile are configured on a Message Routing type virtual server, undisclosed traffic can cause the Traffic Management Microkernel (TMM) to terminate. …
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High 7.3
eth: bnxt: always recalculate features after XDP clearing, fix null-deref
In the Linux kernel, the following vulnerability has been resolved: eth: bnxt: always recalculate features after XDP clearing, fix null-deref Recalculate features when XDP is detached. Before: # ip li set dev eth0 xdp obj xdp_dummy.bpf.o sec xdp # ip li set d…
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High 7.5
net: fec: handle page_pool_dev_alloc_pages error
In the Linux kernel, the following vulnerability has been resolved: net: fec: handle page_pool_dev_alloc_pages error The fec_enet_update_cbd function calls page_pool_dev_alloc_pages but did not handle the case when it returned NULL. There was a WARN_ON(!new_p…
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High 7.8
vsock/virtio: discard packets if the transport changes
In the Linux kernel, the following vulnerability has been resolved: vsock/virtio: discard packets if the transport changes If the socket has been de-assigned or assigned to another transport, we must discard any packets received because they are not expected …
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High 7.5
A null pointer dereference was addressed with improved input validation. This issue is fixed in iOS 18.3 and iPadOS 18.…
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High 7.5
A NULL pointer dereference in the ngap_app::handle_receive routine of OpenAirInterface CN5G AMF (oai-cn5g-amf) up to v2…
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High 7.7
Sunshine improperly enforces pairing protocol request order
Sunshine is a self-hosted game stream host for Moonlight. In 0.23.1 and earlier, Sunshine's pairing protocol implementation does not validate request order and is thereby vulnerable to a MITM attack, potentially allowing an unauthenticated attacker to pair a …
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High 7.1
ksmbd: fix a missing return value check bug
In the Linux kernel, the following vulnerability has been resolved: ksmbd: fix a missing return value check bug In the smb2_send_interim_resp(), if ksmbd_alloc_work_struct() fails to allocate a node, it returns a NULL pointer to the in_work pointer. This can …
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High 7.1
sctp: sysctl: udp_port: avoid using current->nsproxy
In the Linux kernel, the following vulnerability has been resolved: sctp: sysctl: udp_port: avoid using current->nsproxy As mentioned in a previous commit of this series, using the 'net' structure via 'current' is not recommended for different reasons: - Inco…
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High 7.5
Belledonne Communications Linphone-Desktop NULL Pointer Dereference
Belledonne Communications Linphone-Desktop is vulnerable to a NULL Dereference vulnerability, which could allow a remote attacker to create a denial-of-service condition.
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High 7.8CVE-2024-55511 Public exploit
A null pointer dereference vulnerability in Macrium Reflect prior to 8.1.8017 allows a local attacker to cause a system…
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High 7.5
D-Link DIR-823X FUN_00412244 null pointer dereference
A vulnerability has been found in D-Link DIR-823X 240126/240802 and classified as critical. Affected by this vulnerability is the function FUN_00412244. The manipulation leads to null pointer dereference. The attack can be launched remotely. The exploit has b…
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High 7.5
Vulnerabilities in TIFF and PCX Image Codecs Impact QNX Software Development Platform
NULL pointer dereference in the PCX image codec in QNX SDP versions 8.0, 7.1 and 7.0 could allow an unauthenticated attacker to cause a denial-of-service condition in the context of the process using the image codec.
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High 7.5CVE-2025-21285 EPSS 56%
Microsoft Message Queuing (MSMQ) Denial of Service Vulnerability
Microsoft Message Queuing (MSMQ) Denial of Service Vulnerability
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High 7.8
drm/dp_mst: Ensure mst_primary pointer is valid in drm_dp_mst_handle_up_req()
In the Linux kernel, the following vulnerability has been resolved: drm/dp_mst: Ensure mst_primary pointer is valid in drm_dp_mst_handle_up_req() While receiving an MST up request message from one thread in drm_dp_mst_handle_up_req(), the MST topology could b…
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High 7.5
Ffmpeg: null pointer dereference in ffmpeg hls parsing
A flaw was found in FFmpeg's HLS playlist parsing. This vulnerability allows a denial of service via a maliciously crafted HLS playlist that triggers a null pointer dereference during initialization.
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High 7.5
sunrpc: clear XPRT_SOCK_UPD_TIMEOUT when reset transport
In the Linux kernel, the following vulnerability has been resolved: sunrpc: clear XPRT_SOCK_UPD_TIMEOUT when reset transport Since transport->sock has been set to NULL during reset transport, XPRT_SOCK_UPD_TIMEOUT also needs to be cleared. Otherwise, the xs_t…
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High 7.8
accel/ivpu: Prevent recovery invocation during probe and resume
In the Linux kernel, the following vulnerability has been resolved: accel/ivpu: Prevent recovery invocation during probe and resume Refactor IPC send and receive functions to allow correct handling of operations that should not trigger a recovery process. Exp…
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High 7.5
RDMA/hns: Fix NULL pointer derefernce in hns_roce_map_mr_sg()
In the Linux kernel, the following vulnerability has been resolved: RDMA/hns: Fix NULL pointer derefernce in hns_roce_map_mr_sg() ib_map_mr_sg() allows ULPs to specify NULL as the sg_offset argument. The driver needs to check whether it is a NULL pointer befo…
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High 8.8
RDMA/mlx5: Move events notifier registration to be after device registration
In the Linux kernel, the following vulnerability has been resolved: RDMA/mlx5: Move events notifier registration to be after device registration Move pkey change work initialization and cleanup from device resources stage to notifier stage, since this is the …
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High 7.5
NFSD: Prevent NULL dereference in nfsd4_process_cb_update()
In the Linux kernel, the following vulnerability has been resolved: NFSD: Prevent NULL dereference in nfsd4_process_cb_update() @ses is initialized to NULL. If __nfsd4_find_backchannel() finds no available backchannel session, setup_callback_client() will try…
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High 7.8
wifi: ath12k: fix crash when unbinding
In the Linux kernel, the following vulnerability has been resolved: wifi: ath12k: fix crash when unbinding If there is an error during some initialization related to firmware, the function ath12k_dp_cc_cleanup is called to release resources. However this is r…
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High 7.5
iperf v3.17.1 was discovered to contain a segmentation violation via the iperf_exchange_parameters() function.
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High 7.5
In raw\TCP.cpp in Matter (aka connectedhomeip or Project CHIP) through 1.4.0.0 before 27ca6ec, there is a NULL pointer …
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High 7.5
A NULL pointer dereference in D-Link DAP-1513 REVA_FIRMWARE_1.01 allows attackers to cause a Denial of Service (DoS) vi…
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High 8.6
GHSL-2024-118: GStreamer has a null pointer dereference in gst_gdk_pixbuf_dec_flush
GStreamer is a library for constructing graphs of media-handling components. A null pointer dereference vulnerability has been identified in `gst_gdk_pixbuf_dec_flush` within `gstgdkpixbufdec.c`. This function invokes `memcpy`, using `out_pix` as the destinat…
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High 7.8
Animate | NULL Pointer Dereference (CWE-476)
Animate versions 23.0.8, 24.0.5 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…