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CWE-476

NULL Pointer Dereference

4303 CVEs Avg CVSS 6.1 MITRE
88
CRITICAL
1036
HIGH
3083
MEDIUM
94
LOW
874
POC
1
KEV

Monthly

CVE-2026-82055 Sep 08, 16:12 HIGH PATCH This Week

Null pointer dereference in MongoDB Server 8.3.x crashes the mongod process when a specially crafted GeoJSON document is inserted into a collection with a 2dsphere index. An authenticated user with write access can trigger an inconsistency in geometry parsing that leaves an internal object in a partially initialized state; subsequent index key generation then dereferences a null pointer and terminates the server. The net effect is a targeted denial of service requiring only a valid database account with write privileges. No public exploit code or active exploitation (CISA KEV) has been identified at time of analysis.

Denial Of Service Null Pointer Dereference MongoDB Mongodb Server
NVD
CVSS 4.0
7.1
CVE-2026-18453 Sep 07, 14:14 HIGH This Week

Unauthenticated remote denial of service in 389 Directory Server (Red Hat Directory Server 11/12/13) allows a network attacker to crash the LDAP server by sending a crafted sequence of search requests that combine the paged results control with the USE_ONE_BACKEND control, triggering a NULL pointer dereference in `op_shared_search`. The crash terminates the directory service process, disrupting all LDAP-dependent services such as authentication, authorization, and group resolution until manually restarted. No public exploit code or active exploitation (CISA KEV) has been identified at time of analysis, but the AV:N/AC:L/PR:N/UI:N vector makes automated, repeated disruption straightforward.

Denial Of Service Null Pointer Dereference Red Hat Enterprise Linux 10 Red Hat Enterprise Linux 6 Red Hat Enterprise Linux 7 +6
NVD VulDB
CVSS 3.1
7.5
EPSS
0.8%
CVE-2026-86097 Sep 04, 22:38 HIGH PATCH This Week

Null pointer dereference in PX4 Autopilot through 1.17.0 allows any party with PX4 shell access to crash the autopilot process by issuing 'param select' or 'param select-backup' with no path argument, triggering a dereference of a null filename pointer passed to strcmp() inside param_set_default_file() and param_set_backup_file(). The CVSS 4.0 vector (AV:A) confirms the shell must be reachable via an adjacent vector - MAVLink console, UART/USB serial, or companion-computer link - with no authentication required within the shell environment itself. In airborne or safety-critical deployments, a process crash during flight could have consequences beyond mere software unavailability. No public exploit code identified at time of analysis; the fix is confirmed in upstream PR #28475.

Denial Of Service Null Pointer Dereference Px4 Autopilot Px4
NVD GitHub
CVSS 4.0
7.1
EPSS
0.2%
CVE-2026-80118 Sep 04, 18:37 HIGH POC PATCH This Week

Physical memory disclosure and arbitrary SYSTEM-context file write in PassMark PerformanceTest (before 11.1 build 1012), BurnInTest (before 11.1 build 1000), and OSForensics (before 11.1 build 1016) are caused by the shared DirectIo64.sys kernel driver accepting a single IOCTL with no caller-identity validation. Any unprivileged local Windows user can invoke the handler to dump all physical memory in PAGEDU64 crash-dump format to an attacker-chosen path, with the write executed in SYSTEM context - enabling cross-process memory extraction, credential harvesting, and writes to otherwise-inaccessible filesystem locations. Publicly available exploit code exists (GitHub repository confirmed by VulnCheck); no active exploitation has been confirmed in CISA KEV at time of analysis.

Windows Denial Of Service Information Disclosure Null Pointer Dereference Burnintest +3
NVD GitHub
CVSS 4.0
8.4
EPSS
0.1%
CVE-2026-85150 Sep 03, 10:47 HIGH This Week

NULL pointer dereference in GStreamer's RTSP support library (gst-plugins-base) crashes any process that parses a Digest authentication header containing specially crafted whitespace, resulting in a denial-of-service condition. The flaw is bidirectional: an unauthenticated remote attacker can crash an RTSP server by sending a single malformed request when Digest authentication is enabled, and a malicious or compromised RTSP server can crash an RTSP client using the same technique. No confidentiality or integrity impact is confirmed; the sole consequence is process termination. No public exploit code or CISA KEV listing has been identified at time of analysis.

Denial Of Service Null Pointer Dereference Red Hat Enterprise Linux 10 Red Hat Enterprise Linux 7 Red Hat Enterprise Linux 8 +2
NVD VulDB
CVSS 3.1
7.5
EPSS
0.5%
CVE-2026-78222 Sep 02, 15:40 HIGH PATCH This Week

NULL pointer dereference in NGINX JavaScript (njs) crashes NGINX worker processes when an njs script calls ngx.fetch() against a server that returns a malformed HTTP response and subsequently reads Response.statusText on the result. All versions of F5's NGINX JavaScript module are listed as affected per the wildcard CPE, and the impact is confined entirely to the data plane - worker availability - with no control-plane, confidentiality, or integrity exposure. No public exploit code exists and the CVE is not listed in CISA KEV at time of analysis, but the network-accessible path and zero-privilege requirement make this a credible service-disruption risk for any NGINX deployment using njs-based outbound HTTP fetching.

Denial Of Service Null Pointer Dereference Nginx Nginx Javascript F5
NVD
CVSS 4.0
8.7
EPSS
0.3%
CVE-2026-81490 Aug 28, 20:10 HIGH PATCH This Week

Schema-sampling denial-of-service in MongoDB Connector for BI allows a low-privileged database user to permanently halt the schema-refresh routine by creating a view in a sampled namespace that reliably fails on evaluation. The mongosqld process misclassifies the persistent failure as transient, exhausts its retry budget, then continues running with no valid schema - leaving all downstream SQL clients unable to retrieve results until an operator manually removes the offending view or excludes the namespace. No public exploit has been identified at time of analysis, but the low privilege requirement and network accessibility make this a credible insider or multi-tenant threat.

Denial Of Service Null Pointer Dereference MongoDB Bi Connector
NVD
CVSS 4.0
8.3
EPSS
0.2%
CVE-2026-26453 Aug 27, 00:00 HIGH This Week

Null pointer dereference in ccoap's CoAP server (commit 77f55c4b) allows unauthenticated remote attackers to crash the server process by sending a crafted CoAP message. The vulnerability exists in coap_server_handle_session(), which calls strncmp() on a URI_PATH option's data pointer without first validating that the pointer is non-NULL, triggering a segmentation fault on receipt of a malformed packet. With CVSS A:H and no authentication required (PR:N/AC:L), this is a straightforward remote denial-of-service; no public exploit or KEV listing has been identified at time of analysis.

Denial Of Service Null Pointer Dereference
NVD GitHub
CVSS 3.1
7.5
EPSS
0.2%
CVE-2026-26457 Aug 27, 00:00 HIGH This Week

Null pointer dereference in ccoap's coap_dump_msg() function causes remote denial of service when processing CoAP messages that carry options with zero-length values. The flaw is pinned to commit 77f55c4b466e99327c24ace8a2913d3ba7e2ccd5 of the ipflavors/ccoap library. An unauthenticated remote attacker reachable by the CoAP service can crash any process that links this library by sending a single crafted packet. No public exploit has been identified at time of analysis, and EPSS is 0.15% (5th percentile), reflecting low real-world exploitation activity.

Denial Of Service Null Pointer Dereference
NVD GitHub
CVSS 3.1
7.5
EPSS
0.2%
CVE-2026-30056 Aug 27, 00:00 HIGH This Week

NULL pointer dereference in the AMF NGAP Dispatcher of free5GC v4.0.1 allows an unauthenticated remote attacker to crash the Access and Mobility Management Function by sending crafted NGAP messages during the initialization of a new RAN connection, resulting in complete availability loss for the 5G core control plane. The AMF is a central 5G core component responsible for registration and mobility management for all connected user equipment, so a successful crash severs control-plane service for all gNBs attached to that AMF instance. No public exploit code has been confirmed and no CISA KEV listing exists at time of analysis, though SSVC rates the attack as Automatable given the no-authentication, low-complexity network exposure.

Denial Of Service Null Pointer Dereference N A
NVD GitHub
CVSS 3.1
7.5
EPSS
0.3%
CVSS 7.1
HIGH PATCH This Week

Null pointer dereference in MongoDB Server 8.3.x crashes the mongod process when a specially crafted GeoJSON document is inserted into a collection with a 2dsphere index. An authenticated user with write access can trigger an inconsistency in geometry parsing that leaves an internal object in a partially initialized state; subsequent index key generation then dereferences a null pointer and terminates the server. The net effect is a targeted denial of service requiring only a valid database account with write privileges. No public exploit code or active exploitation (CISA KEV) has been identified at time of analysis.

Denial Of Service Null Pointer Dereference MongoDB +1
NVD
EPSS 1% CVSS 7.5
HIGH This Week

Unauthenticated remote denial of service in 389 Directory Server (Red Hat Directory Server 11/12/13) allows a network attacker to crash the LDAP server by sending a crafted sequence of search requests that combine the paged results control with the USE_ONE_BACKEND control, triggering a NULL pointer dereference in `op_shared_search`. The crash terminates the directory service process, disrupting all LDAP-dependent services such as authentication, authorization, and group resolution until manually restarted. No public exploit code or active exploitation (CISA KEV) has been identified at time of analysis, but the AV:N/AC:L/PR:N/UI:N vector makes automated, repeated disruption straightforward.

Denial Of Service Null Pointer Dereference Red Hat Enterprise Linux 10 +8
NVD VulDB
EPSS 0% CVSS 7.1
HIGH PATCH This Week

Null pointer dereference in PX4 Autopilot through 1.17.0 allows any party with PX4 shell access to crash the autopilot process by issuing 'param select' or 'param select-backup' with no path argument, triggering a dereference of a null filename pointer passed to strcmp() inside param_set_default_file() and param_set_backup_file(). The CVSS 4.0 vector (AV:A) confirms the shell must be reachable via an adjacent vector - MAVLink console, UART/USB serial, or companion-computer link - with no authentication required within the shell environment itself. In airborne or safety-critical deployments, a process crash during flight could have consequences beyond mere software unavailability. No public exploit code identified at time of analysis; the fix is confirmed in upstream PR #28475.

Denial Of Service Null Pointer Dereference Px4 Autopilot +1
NVD GitHub
EPSS 0% CVSS 8.4
HIGH POC PATCH This Week

Physical memory disclosure and arbitrary SYSTEM-context file write in PassMark PerformanceTest (before 11.1 build 1012), BurnInTest (before 11.1 build 1000), and OSForensics (before 11.1 build 1016) are caused by the shared DirectIo64.sys kernel driver accepting a single IOCTL with no caller-identity validation. Any unprivileged local Windows user can invoke the handler to dump all physical memory in PAGEDU64 crash-dump format to an attacker-chosen path, with the write executed in SYSTEM context - enabling cross-process memory extraction, credential harvesting, and writes to otherwise-inaccessible filesystem locations. Publicly available exploit code exists (GitHub repository confirmed by VulnCheck); no active exploitation has been confirmed in CISA KEV at time of analysis.

Windows Denial Of Service Information Disclosure +5
NVD GitHub
EPSS 0% CVSS 7.5
HIGH This Week

NULL pointer dereference in GStreamer's RTSP support library (gst-plugins-base) crashes any process that parses a Digest authentication header containing specially crafted whitespace, resulting in a denial-of-service condition. The flaw is bidirectional: an unauthenticated remote attacker can crash an RTSP server by sending a single malformed request when Digest authentication is enabled, and a malicious or compromised RTSP server can crash an RTSP client using the same technique. No confidentiality or integrity impact is confirmed; the sole consequence is process termination. No public exploit code or CISA KEV listing has been identified at time of analysis.

Denial Of Service Null Pointer Dereference Red Hat Enterprise Linux 10 +4
NVD VulDB
EPSS 0% CVSS 8.7
HIGH PATCH This Week

NULL pointer dereference in NGINX JavaScript (njs) crashes NGINX worker processes when an njs script calls ngx.fetch() against a server that returns a malformed HTTP response and subsequently reads Response.statusText on the result. All versions of F5's NGINX JavaScript module are listed as affected per the wildcard CPE, and the impact is confined entirely to the data plane - worker availability - with no control-plane, confidentiality, or integrity exposure. No public exploit code exists and the CVE is not listed in CISA KEV at time of analysis, but the network-accessible path and zero-privilege requirement make this a credible service-disruption risk for any NGINX deployment using njs-based outbound HTTP fetching.

Denial Of Service Null Pointer Dereference Nginx +2
NVD
EPSS 0% CVSS 8.3
HIGH PATCH This Week

Schema-sampling denial-of-service in MongoDB Connector for BI allows a low-privileged database user to permanently halt the schema-refresh routine by creating a view in a sampled namespace that reliably fails on evaluation. The mongosqld process misclassifies the persistent failure as transient, exhausts its retry budget, then continues running with no valid schema - leaving all downstream SQL clients unable to retrieve results until an operator manually removes the offending view or excludes the namespace. No public exploit has been identified at time of analysis, but the low privilege requirement and network accessibility make this a credible insider or multi-tenant threat.

Denial Of Service Null Pointer Dereference MongoDB +1
NVD
EPSS 0% CVSS 7.5
HIGH This Week

Null pointer dereference in ccoap's CoAP server (commit 77f55c4b) allows unauthenticated remote attackers to crash the server process by sending a crafted CoAP message. The vulnerability exists in coap_server_handle_session(), which calls strncmp() on a URI_PATH option's data pointer without first validating that the pointer is non-NULL, triggering a segmentation fault on receipt of a malformed packet. With CVSS A:H and no authentication required (PR:N/AC:L), this is a straightforward remote denial-of-service; no public exploit or KEV listing has been identified at time of analysis.

Denial Of Service Null Pointer Dereference
NVD GitHub
EPSS 0% CVSS 7.5
HIGH This Week

Null pointer dereference in ccoap's coap_dump_msg() function causes remote denial of service when processing CoAP messages that carry options with zero-length values. The flaw is pinned to commit 77f55c4b466e99327c24ace8a2913d3ba7e2ccd5 of the ipflavors/ccoap library. An unauthenticated remote attacker reachable by the CoAP service can crash any process that links this library by sending a single crafted packet. No public exploit has been identified at time of analysis, and EPSS is 0.15% (5th percentile), reflecting low real-world exploitation activity.

Denial Of Service Null Pointer Dereference
NVD GitHub
EPSS 0% CVSS 7.5
HIGH This Week

NULL pointer dereference in the AMF NGAP Dispatcher of free5GC v4.0.1 allows an unauthenticated remote attacker to crash the Access and Mobility Management Function by sending crafted NGAP messages during the initialization of a new RAN connection, resulting in complete availability loss for the 5G core control plane. The AMF is a central 5G core component responsible for registration and mobility management for all connected user equipment, so a successful crash severs control-plane service for all gNBs attached to that AMF instance. No public exploit code has been confirmed and no CISA KEV listing exists at time of analysis, though SSVC rates the attack as Automatable given the no-authentication, low-complexity network exposure.

Denial Of Service Null Pointer Dereference N A
NVD GitHub

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