Common Weakness Enumeration
CWE-476
AllowedNULL Pointer Dereference
Abstraction: Base · Status: Stable
The product dereferences a pointer that it expects to be valid but is NULL.
6677 vulnerabilities reference this CWE, most recent first.
CVE-2026-16702 (GCVE-0-2026-16702)
Vulnerability from cvelistv5 – Published: 2026-09-14 19:43 – Updated: 2026-09-14 20:13
VLAI
EPSS
VEX
Title
IBM® Db2® federated server could allow a remote authenticated attacker to cause a denial of service due to a null pointer dereference
Summary
IBM Db2 11.5.0 through 11.5.9, and 12.1.0 through 12.1.5 for Linux, UNIX and Windows (includes DB2 Connect Server) could allow a remote authenticated attacker to cause a denial of service due to a null pointer dereference.
Severity
6.5 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-14 20:10 UTC
CWE
- CWE-476 - NULL Pointer Dereference
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://www.ibm.com/support/pages/node/7286981 | vendor-advisorypatch |
Impacted products
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"value": "\u003cp\u003eCustomers running any vulnerable affected level of an affected Program, V11.5, and V12.1, can download the security update containing the interim fix for this issue from Fix Central. These security updates are available based on the most recent level for each impacted release: V11.5.9, V12.1.4, and V12.1.5. They can be applied to any affected level of the appropriate release to remediate this vulnerability.\u003c/p\u003e\u003cdiv\u003e\u003ctable\u003e\u003ccolgroup\u003e\u003ccol/\u003e\u003ccol/\u003e\u003ccol/\u003e\u003ccol/\u003e\u003c/colgroup\u003e\u003ctbody\u003e\u003ctr\u003e\u003ctd\u003e\u003cstrong\u003eRelease\u003c/strong\u003e\u003c/td\u003e\u003ctd\u003e\u003cstrong\u003eFixed in mod pack\u003c/strong\u003e\u003c/td\u003e\u003ctd\u003e\u003cstrong\u003eAPAR\u003c/strong\u003e\u003c/td\u003e\u003ctd\u003e\u003cstrong\u003eDownload URL\u003c/strong\u003e\u003c/td\u003e\u003c/tr\u003e\u003ctr\u003e\u003ctd\u003eV11.5\u003c/td\u003e\u003ctd\u003eTBD\u003c/td\u003e\u003ctd\u003e\u003ca href=\"https://www.ibm.com/mysupport/s/defect/aCIgJ000000EjbZ/dt472908\" rel=\"nofollow\"\u003eDT472908\u003c/a\u003e\u003c/td\u003e\u003ctd\u003eSecurity Update #90467 or later for V11.5.9 available at this link:\u003cbr/\u003e\u003ca href=\"https://www.ibm.com/support/pages/node/7087189\" rel=\"noopener noreferrer nofollow\"\u003ehttps://www.ibm.com/support/pages/node/7087189\u003c/a\u003e\u003c/td\u003e\u003c/tr\u003e\u003ctr\u003e\u003ctd\u003eV12.1\u003c/td\u003e\u003ctd\u003eTBD\u003c/td\u003e\u003ctd\u003e\u003ca href=\"https://www.ibm.com/mysupport/s/defect/aCIgJ000000EjbZ/dt472908\" rel=\"nofollow\"\u003eDT472908\u003c/a\u003e\u003c/td\u003e\u003ctd\u003e\u003cp\u003eSecurity Update #91310 or later for V12.1.4 available at this link:\u003cbr/\u003e\u003ca href=\"https://www.ibm.com/support/pages/node/7267513\" rel=\"nofollow\"\u003ehttps://www.ibm.com/support/pages/node/7267513\u003c/a\u003e\u003c/p\u003e\u003cp\u003eSecurity Update #89304 or later for V12.1.5 available at this link:\u003cbr/\u003e\u003ca href=\"https://www.ibm.com/support/pages/node/7282633\" rel=\"nofollow\"\u003ehttps://www.ibm.com/support/pages/node/7282633\u003c/a\u003e\u003c/p\u003e\u003c/td\u003e\u003c/tr\u003e\u003c/tbody\u003e\u003c/table\u003e\u003c/div\u003e\u003cp\u003eIBM does not disclose key Db2 functionality nor replication steps for a vulnerability to avoid providing too much information to any potential malicious attacker. IBM does not want to enable a malicious attacker with sufficient knowledge to craft an exploit of the vulnerability.\u003c/p\u003e"
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CVE-2026-15891 (GCVE-0-2026-15891)
Vulnerability from cvelistv5 – Published: 2026-09-13 22:46 – Updated: 2026-09-14 13:00
VLAI
EPSS
VEX
Title
NULL pointer dereference in Zephyr MQTT-SN client when removing a non-responsive gateway
Summary
The MQTT-SN client keepalive handler process_ping() in subsys/net/lib/mqtt_sn/mqtt_sn.c removes the gateway record after PINGREQ retries are exhausted. It invoked SYS_SLIST_PEEK_HEAD_CONTAINER(&client->gateways, gw, next) but discarded the result. That macro is a pure expression that does not assign to gw, so gw retained its NULL initializer regardless of the list contents.
The code then dereferences the NULL gw (gw->gw_id) and passes it to mqtt_sn_gw_destroy(), reaching k_mem_slab_free(&gateways, NULL). With CONFIG_MEM_SLAB_POINTER_VALIDATE enabled this triggers k_panic(); in the default configuration it performs a write through the NULL pointer ((char )mem = slab->free_list;) and corrupts the slab free list. The outcome is a crash/kernel panic or, on targets where address 0 is writable, silent memory-allocator corruption.
The vulnerable branch runs whenever the connected MQTT-SN gateway fails to answer keepalive PINGREQs for the configured number of retries. This condition is controlled by the remote peer: a malicious or compromised gateway, or an on-path/adjacent attacker that advertises itself as a gateway and then stops responding (or blackholes the real gateway's PINGRESPs), forces the client into the defect. MQTT-SN runs over UDP and no authentication is required.
The impact is a remotely triggerable denial of service (availability) of the affected MQTT-SN client; there is no attacker-controlled data written. The sibling remover process_advertise() uses SYS_SLIST_FOR_EACH_CONTAINER_SAFE and is not affected. The fix assigns the macro's return value to gw.
Severity
7.5 (High)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-14 12:55 UTC
CWE
- CWE-476 - memory-safety
Assigner
References
2 references
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| zephyrproject | zephyr |
Affected:
4.1.0 , < 4.4.2
(semver)
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CVE-2026-15690 (GCVE-0-2026-15690)
Vulnerability from cvelistv5 – Published: 2026-07-14 11:45 – Updated: 2026-07-14 12:56
VLAI
EPSS
VEX
Title
open62541 Shared Client ua_client_connect.c responseReadNamespacesArray null pointer dereference
Summary
A vulnerability was identified in open62541 up to 1.5.5. Affected by this issue is the function responseReadNamespacesArray of the file src/client/ua_client_connect.c of the component Shared Client Library. Such manipulation of the argument Server_NamespaceArray leads to null pointer dereference. The attack can be executed remotely. The attack requires a high level of complexity. The exploitation is known to be difficult. The exploit is publicly available and might be used. The project closed the issue report, stating that this is not the official way to report a security vulnerability.
Severity
SSVC
Exploitation: poc
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-07-14 12:56 UTC
Assigner
References
6 references
| URL | Tags |
|---|---|
| https://vuldb.com/vuln/378237 | vdb-entrytechnical-description |
| https://vuldb.com/vuln/378237/cti | signaturepermissions-required |
| https://vuldb.com/cve/CVE-2026-15690 | third-party-advisory |
| https://vuldb.com/submit/855996 | third-party-advisory |
| https://github.com/open62541/open62541/issues/8104 | exploitissue-tracking |
| https://github.com/open62541/open62541/ | product |
Impacted products
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CVE-2026-15352 (GCVE-0-2026-15352)
Vulnerability from cvelistv5 – Published: 2026-07-16 19:48 – Updated: 2026-07-17 13:26
VLAI
EPSS
VEX
Title
NASA Core Flight System (cFS) Health & Safety (HS) Application NULL Pointer Dereference
Summary
A vulnerability exists in the Health & Safety (HS) application of NASA's Core Flight System (cFS). The flaw allows the application to crash via segmentation fault when processing a routine Housekeeping Telemetry request, leading to denial of service.
Severity
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-07-17 13:26 UTC
CWE
- CWE-476 - NULL pointer dereference
Assigner
References
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| NASA | Core Flight System (cFS) Health & Safety (HS) Application |
Affected:
0 , < v7.0.1
(custom)
Unaffected: v7.0.1 |
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CVE-2026-15184 (GCVE-0-2026-15184)
Vulnerability from cvelistv5 – Published: 2026-07-09 12:00 – Updated: 2026-07-09 12:55 X_Open Source
VLAI
EPSS
VEX
Title
GNU LibreDWG DWG File dwg.c dwg_next_entity null pointer dereference
Summary
A vulnerability was found in GNU LibreDWG up to 0.13.4. The impacted element is the function dwg_next_entity of the file src/dwg.c of the component DWG File Handler. Performing a manipulation of the argument next_obj results in null pointer dereference. The attack must be initiated from a local position. The exploit has been made public and could be used. Upgrading to version 0.14 is sufficient to resolve this issue. The patch is named dde45dac3c4d902e4d8fed150a8017b9732019c9. Upgrading the affected component is recommended. Different than CVE-2026-9503.
Severity
SSVC
Exploitation: poc
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-07-09 12:54 UTC
Assigner
References
9 references
| URL | Tags |
|---|---|
| https://vuldb.com/vuln/377110 | vdb-entrytechnical-description |
| https://vuldb.com/vuln/377110/cti | signaturepermissions-required |
| https://vuldb.com/cve/CVE-2026-15184 | third-party-advisory |
| https://vuldb.com/submit/851192 | third-party-advisory |
| https://github.com/LibreDWG/libredwg/issues/1253 | issue-tracking |
| https://github.com/HackC0der/CVE-Repos/blob/main/… | exploit |
| https://github.com/LibreDWG/libredwg/commit/dde45… | patch |
| https://github.com/LibreDWG/libredwg/releases/tag/0.14 | patch |
| https://www.gnu.org/ | broken-linkproduct |
Impacted products
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CVE-2026-15171 (GCVE-0-2026-15171)
Vulnerability from cvelistv5 – Published: 2026-07-08 20:51 – Updated: 2026-07-09 13:44
VLAI
EPSS
VEX
Title
NULL Pointer Dereference in Wireshark
Summary
SSH protocol dissector crash in Wireshark 4.6.0 to 4.6.6 and 4.4.0 to 4.4.16 allows denial of service
Severity
5.5 (Medium)
SSVC
Exploitation: poc
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-07-09 13:44 UTC
CWE
- CWE-476 - NULL Pointer Dereference
Assigner
References
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Wireshark Foundation | Wireshark |
Affected:
4.6.0 , < 4.6.7
(semver)
Affected: 4.4.0 , < 4.4.17 (semver) |
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CVE-2026-14790 (GCVE-0-2026-14790)
Vulnerability from cvelistv5 – Published: 2026-07-06 02:15 – Updated: 2026-07-06 15:20 X_Open Source
VLAI
EPSS
VEX
Title
GPAC Media File write_nhml.c nhmldump_send_frame null pointer dereference
Summary
A flaw has been found in GPAC 26.02.0. This affects the function nhmldump_send_frame of the file src/filters/write_nhml.c of the component Media File Handler. Executing a manipulation can lead to null pointer dereference. The attack requires local access. The exploit has been published and may be used. This patch is called bd1d94e70e3bef364c07c5a1d94eca5c9f56e160. A patch should be applied to remediate this issue. The project explains: "I would consider most of these more as bugs than vulns but anyway they're good to fix".
Severity
SSVC
Exploitation: poc
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-07-06 15:20 UTC
Assigner
References
7 references
| URL | Tags |
|---|---|
| https://vuldb.com/vuln/376379 | vdb-entrytechnical-description |
| https://vuldb.com/vuln/376379/cti | signaturepermissions-required |
| https://vuldb.com/cve/CVE-2026-14790 | third-party-advisory |
| https://vuldb.com/submit/850391 | third-party-advisory |
| https://github.com/gpac/gpac/issues/3596 | exploitissue-tracking |
| https://github.com/gpac/gpac/commit/bd1d94e70e3be… | patch |
| https://github.com/gpac/gpac/ | product |
Impacted products
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CVE-2026-14457 (GCVE-0-2026-14457)
Vulnerability from cvelistv5 – Published: 2026-08-25 12:58 – Updated: 2026-08-25 14:13
VLAI
EPSS
VEX
Title
RPK Server Signature Algorithm Selection Can Dereference a Missing Certificate
Summary
Issue summary: In a server or client configuration with RFC7250 Raw Public Keys (RPKs)
enabled, and only the private key (with no associated certificate) configured locally,
a NULL pointer dereference may occur when the remote peer solicits raw public keys and
also sends the typically omitted "signature_algorithms_cert" TLS extension.
Impact summary: The impact is limited to a possible Denial of Service as a result of
an application abort, no data disclosure or remote command execution are possible.
CWE: CWE-476: NULL Pointer Dereference
Description: While a passing comment in sample code in the documentation suggests
that key-only RPK configurations are supported, the best-practice RPK configuration
is to always configure a corresponding certificate (possibly self-signed or
signed by any convenient CA).
When the private key is configured along with a matching certificate, the
"signature_algorithms_cert" extension is handled reliably even without the
fix, and peer clients or servers that don't support raw public keys may be
able to complete a TLS connection by pinning or verifying the corresponding
certificate or its public key.
Deployments that prefer to configure just a private key with no certificate
need to upgrade to an updated release as noted below.
FIPS impact: no
No FIPS modules are affected by this issue, as the SSL protocol implementation
is outside the OpenSSL FIPS module boundary.
Severity
7.5 (High)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-25 14:13 UTC
CWE
- CWE-476 - NULL Pointer Dereference
Assigner
References
5 references
Impacted products
Date Public
2026-08-25 11:36
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CVE-2026-14324 (GCVE-0-2026-14324)
Vulnerability from cvelistv5 – Published: 2026-07-01 14:09 – Updated: 2026-08-31 08:07
VLAI
EPSS
VEX
Title
Pipewire: raop rtsp null deref
Summary
RAOP module accepts unbounded Content-Length values and does not check the pw_array_add() return.
Severity
6.5 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-07-01 16:15 UTC
CWE
- CWE-476 - NULL Pointer Dereference
Assigner
References
4 references
| URL | Tags |
|---|---|
| https://access.redhat.com/errata/RHSA-2026:61240 | vendor-advisoryx_refsource_REDHAT |
| https://access.redhat.com/errata/RHSA-2026:61241 | vendor-advisoryx_refsource_REDHAT |
| https://access.redhat.com/security/cve/CVE-2026-14324 | vdb-entryx_refsource_REDHAT |
| https://bugzilla.redhat.com/show_bug.cgi?id=2495903 | issue-trackingx_refsource_REDHAT |
Impacted products
4 products
| Vendor | Product | Version | |
|---|---|---|---|
| Red Hat | Red Hat Enterprise Linux 10 |
Unaffected:
0:1.4.11-1.el10_2.1 , < *
(rpm)
cpe:/o:redhat:enterprise_linux:10.2 |
|
| Red Hat | Red Hat Enterprise Linux 9 |
Unaffected:
0:1.4.11-1.el9_8.2 , < *
(rpm)
cpe:/a:redhat:enterprise_linux:9::appstream |
|
| Red Hat | Red Hat Enterprise Linux 10 |
cpe:/o:redhat:enterprise_linux:10
|
|
| Red Hat | Red Hat Enterprise Linux 8 |
cpe:/o:redhat:enterprise_linux:8
|
Date Public
2026-07-01 00:00
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CVE-2026-13217 (GCVE-0-2026-13217)
Vulnerability from cvelistv5 – Published: 2026-08-25 16:05 – Updated: 2026-08-25 19:40
VLAI
EPSS
VEX
Title
NULL-pointer dereference in Zephyr OCPP CALLRESULT parsing via unchecked strtok_r/atoi
Summary
The OCPP 1.6 client in subsys/net/lib/ocpp/ocpp.c reconstructs a session handle and PDU id from the uid field of a CALLRESULT message. In ocpp_process_server_msg() the code calls atoi(strtok_r(uid, "-", &tmp)) without checking the strtok_r return value. When the server-supplied uid is empty or contains no - delimiter, strtok_r() returns NULL and atoi(NULL) dereferences a NULL pointer, which is undefined behaviour.
The uid originates from network data: parse_rpc_msg() in subsys/net/lib/ocpp/ocpp_j.c JSON-parses a frame received from the OCPP central system over TCP/WebSocket and copies the server-controlled string into the local buffer. A malicious or compromised central system, or a man-in-the-middle on a non-TLS ws:// connection, can return a malformed uid to reach the defect. No authentication beyond the existing server connection (or MITM position) is required, and the reconstructed pointer is membership-validated by ocpp_session_is_valid(), so the impact is limited to the NULL dereference rather than arbitrary pointer use.
On Zephyr targets that trap access to address 0 (MMU/MPU platforms or CONFIG_NULL_POINTER_EXCEPTION_DETECTION), the dereference faults inside the OCPP reader thread and invokes the fatal handler, producing a remote denial of service of the charge point; on bare targets where address 0 is readable the call returns 0 and is benign, so the impact is availability-only and platform-conditional.
The applied fix guards only the first atoi(); the second strtok_r(NULL, "-", &tmp) followed by pdu = atoi(buf) in the same function remains unguarded and the identical NULL dereference is still reachable from the same network input when the uid has a first token but no second --delimited token. A complete fix should validate the second token as well.
Severity
5.9 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-25 19:40 UTC
CWE
- CWE-476 - memory-safety
Assigner
References
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| zephyrproject | zephyr |
Affected:
4.3.0 , < 4.4.2
(semver)
|
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Mitigation MIT-56
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].
Mitigation
Requirements
Select a programming language that is not susceptible to these issues.
Mitigation
Implementation
Check the results of all functions that return a value and verify that the value is non-null before acting upon it.
Mitigation
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.
Mitigation
Implementation
Explicitly initialize all variables and other data stores, either during declaration or just before the first usage.
No CAPEC attack patterns related to this CWE.