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
1,545 results · Clear filters · Feed
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Medium 4.7
NULL pointer dereference in Zephyr Dhara FTL disk driver on flash read error during journal resume
The Dhara flash translation layer disk driver (drivers/disk/ftl_dhara.c) implemented the dhara_nand_ callbacks so that, on a flash error, the error code was written unconditionally through the caller-supplied dhara_error_t err pointer (e.g. *err = DHARA_E_ECC…
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Medium 5.5
A NULL pointer dereference in smooth_parse_stream_index() in src/media_tools/mpd.c in GPAC master HEAD before commit b3…
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Medium 5.5
DNG SDK | NULL Pointer Dereference (CWE-476)
DNG SDK versions 1.7.1 2536 and earlier are affected by a NULL Pointer Dereference vulnerability that could result in an application denial-of-service. An attacker could exploit this vulnerability to crash the application, leading to a denial-of-service condi…
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Medium 4.6
NULL-pointer dereference DoS in MAX32 USB device controller transfer-completion handlers
The MAX32xxx USB device controller driver (drivers/usb/udc/udc_max32.c, compatible adi_max32_usbhs) dereferenced an endpoint buffer in its OUT and IN transfer-completion handlers without checking it for NULL. udc_event_xfer_out_done() called net_buf_add(buf, …
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Medium 6.5
Pipewire: raop rtsp null deref
RAOP module accepts unbounded Content-Length values and does not check the pw_array_add() return.
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Medium 5.3
In Modem, there is a possible system crash due to improper input validation. This could lead to remote denial of servic…
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Medium 6.2
A NULL pointer dereference in the AP4_TkhdAtom::GetTrackId() function of Aleksoid1978 MPC-BE before commit 4341cb3 allo…
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Medium 5.3
Woodpecker < 3.15.0 - Unauthenticated NULL Pointer Dereference in /api/orgs/lookup Enables Log-Flooding Denial of Service
Woodpecker before 3.15.0 registers the /api/orgs/lookup/*org_full_name endpoint without authentication middleware, and the LookupOrg handler unconditionally dereferences the session user (user.ForgeID, via ForgeFromUser) when selecting the forge to query. For…
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Medium 6.2
NULL-pointer dereference in MCUmgr serial/console SMP transport on buffer-pool exhaustion
mcumgr_serial_process_frag() in subsys/mgmt/mcumgr/transport/src/serial_util.c calls net_buf_reset() on the result of smp_packet_alloc() before checking it for NULL. smp_packet_alloc() uses net_buf_alloc(K_NO_WAIT) against the shared MCUmgr packet pool (CONFI…
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Medium 6.5
Remotely triggerable NULL-pointer dereference in Bluetooth LE Audio BAP unicast client QoS-state handling
The Zephyr Bluetooth LE Audio Basic Audio Profile (BAP) unicast client mishandles peer-supplied ASE state notifications. In unicast_client_ep_qos_state() (subsys/bluetooth/audio/bap_unicast_client.c), the handler writes attacker-controlled QoS fields (interva…
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Medium 6.5
Envoy: grpc_stats filter segfault on Connect protocol requests to direct_response routes
Envoy is an open source edge and service proxy designed for cloud-native applications. From 1.26.0 until 1.35.13, 1.36.9, 1.37.5, and 1.38.3, the envoy.filters.http.grpc_stats filter crashes (null pointer dereference / segfault) when a Connect protocol reques…
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Medium 5.9
Envoy: Null pointer deref in internal redirects
Envoy is an open source edge and service proxy designed for cloud-native applications. From 1.18.0 until 1.35.13, 1.36.9, 1.37.5, and 1.38.3, the router filter contains a null pointer dereference vulnerability when handling HTTP 303 (See Other) internal redir…
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Medium 6.5
Authenticated Denial of Service via Malicious Backup Tarball in LXD
Nil-pointer dereference in CreateCustomVolumeFromBackup in LXD up to version 6.8 and 5.21 on Linux allows an authenticated user with can_create_storage_volumes permissions to cause a denial of service via a specially crafted custom-volume backup tarball that …
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Medium 5.5
A NULL pointer dereference in the gf_filter_in_parent_chain function (/filter_core/filter_pid.c) of GPAC Project/MP4Box…
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Medium 6.5
GPAC MP4Box v2.4 was discovered to contain a NULL pointer dereference in the gf_isom_add_track_kind() function at isome…
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Medium 5.9
Websphere Application Server is Affected By a Denial of Service
IBM WebSphere Application Server and IBM WebSphere Application Server Liberty are vulnerable to denial of service in the WebSphere WebServer Plug-in component when an attacker can pass crafted requests to the web server.
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Medium 5.5
pam_usb: NULL Dereference Crash in pusb_is_loginctl_local when loginctl Returns Empty Remote Field
pam_usb provides hardware authentication for Linux using ordinary removable media. In versions 0.9.1 and below, pusb_is_loginctl_local() can cause a NULL dereference crash when parsing loginctl output. The function calls popen() and reads the result; if the R…
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Medium 5.5
RFA File Parsing Vulnerability in Autodesk Revit
A maliciously crafted RFA file, when converted to FormIt via “Convert RFA to FormIt” in Autodesk Revit, can force a NULL Pointer Dereference vulnerability. Successful exploitation may cause the application to crash, leading to a denial-of-service condition.
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Medium 5.3
Memory safety bug fixed in Thunderbird ESR 140.12
Memory safety bug fixed in Thunderbird ESR 140.12. This vulnerability was fixed in Firefox ESR 140.12 and Thunderbird 140.12.
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Medium 5.5
A segmentation violation in the Track_SetStreamDescriptor function (isomedia/track.c) of GPAC MP4Box v2.4 allows attack…
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Medium 5.5
A NULL pointer dereference in the gf_isom_copy_sample_info function (isomedia/isom_write.c) of GPAC MP4Box v2.4 allows …
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Medium 5.5
A NULL pointer dereference in the gf_media_map_esd function (media_tools/isom_tools.c) of GPAC MP4Box v2.4 allows attac…
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Medium 5.5
A NULL pointer dereference in the TrackWriter handling component (filters/mux_isom.c) of GPAC MP4Box v2.4 allows attack…
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Medium 6.3
A NULL pointer dereference occurs in Roy Marples NetworkConfiguration/dhcpcd 10.3.0 while parsing configuration options…
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Medium 5.5
Avira antivirus engine null pointer dereference when scanning a malformed PE file
Null pointer dereference vulnerability in Avira Antivirus engine when scanning a malformed Windows PE file may allow Denial-of-Service of the antivirus engine process. This issue affects Avira Antivirus on Windows, macOS, and Linux for engine builds before 8.…
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Medium 4.3
ImageMagick: Null Pointer Dereference in distort operation when passing incorrect arguments
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…
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Medium 6.9
QTS, QuTS hero
A NULL pointer dereference vulnerability has been reported to affect several QNAP operating system versions. The remote attackers can then exploit the vulnerability to launch a denial-of-service (DoS) attack. We have already fixed the vulnerability in the fol…
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Medium 5.1
NULL Pointer Dereference in networkRequest.cgi
A NULL pointer dereference vulnerability has been reported to affect QTS, QVP, QuTS cloud and QuTS hero. If a remote attacker gains an administrator account, they can then exploit the vulnerability to launch a denial-of-service (DoS) attack. We have already f…
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Medium 6.5
GeometryCollection with strict-winding polygon causes server crash during 2dsphere index key generation
An authorized user could trigger a server crash by running a query with a 2dsphere index on a field that stores a GeoJSON GeometryCollection containing a Polygon with a strict-winding CRS. Strict-winding polygons are intentionally unsupported for indexing, bu…
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Medium 6.5
Aggregation sub-pipeline null dereference may allow DoS via crafted getMore
In MongoDB Server 8.0, an aggregation stage can leave its _subPipeline field null during processing of certain pipelines. If a getMore is subsequently issued on the same cursor, the server may dereference this null sub-pipeline when reattaching to the operati…
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Medium 5.5
InDesign Desktop | NULL Pointer Dereference (CWE-476)
InDesign Desktop versions 21.3, 20.5.3 and earlier are affected by a NULL Pointer Dereference vulnerability that could result in an application denial-of-service. An attacker could exploit this vulnerability to crash the application, leading to a denial-of-se…
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Medium 5.5
InDesign Desktop | NULL Pointer Dereference (CWE-476)
InDesign Desktop versions 21.3, 20.5.3 and earlier are affected by a NULL Pointer Dereference vulnerability that could result in an application denial-of-service. An attacker could exploit this vulnerability to crash the application, leading to a denial-of-se…
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Medium 6.5
Windows Kerberos Denial of Service Vulnerability
Null pointer dereference in Windows Kerberos allows an authorized attacker to deny service over a network.
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Medium 5.9
NULL Pointer Dereference in CRMF EncryptedValue Decryption
Issue summary: An attacker-controlled CMP (Certificate Management Protocol) server could trigger a NULL pointer dereference in a CMP client application. Impact summary: A NULL pointer dereference causes a crash of the application and a Denial of Service. An a…
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Medium 5.9
Possible NULL Dereference in Password-Based CMS Decryption
Issue summary: A specially crafted password-encrypted CMS message can trigger a NULL pointer dereference during CMS decryption. Impact summary: This NULL pointer dereference leads to an application crash and a Denial of Service. The CMS PasswordRecipientInfo.…
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Medium 5.9
389-ds-base: 389-ds-base: null pointer dereference in deref control plugin ber parser
A flaw was found in 389 Directory Server. The dereference control plugin does not check for allocation failure before using a BER structure, allowing an unauthenticated remote attacker to crash the LDAP server when the system is under memory pressure.
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Medium 6.5
A NULL pointer dereference in the ctts_box_write function (isomedia/box_code_base.c) of GPAC MP4Box v2.4 allows attacke…
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Medium 5.5
A NULL pointer dereference in the gf_isom_get_user_data_count function (isomedia/isom_read.c) of GPAC MP4Box v2.4 allow…
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Medium 6.5
HAX CMS NodeJS application Vulnerable to Denial of Service using Malicious Import Request
HAX CMS helps manage microsite universe with PHP or NodeJs backends. Prior to version 26.0.0, the HAX CMS NodeJS application crashes when an authenticated attacker sends a specially crafted site creation request to the createSite endpoint. A single request is…
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Medium 5.0
A NULL pointer dereference in the gf_filter_pid_resolve_file_template_ex function (/filter_core/filter_pid.c) of GPAC P…