Common Weakness Enumeration

CWE-476

Allowed

NULL Pointer Dereference

Abstraction: Base · Status: Stable

API response cwe.mitre.org

The product dereferences a pointer that it expects to be valid but is NULL.

6736 vulnerabilities reference this CWE, most recent first.

CVE-2026-0710 (GCVE-0-2026-0710)

Vulnerability from cvelistv5 – Published: 2026-01-23 03:47 – Updated: 2026-01-23 19:04

Title

Sipp/sipp: sipp: denial of service and potential arbitrary code execution vulnerability

Summary

A flaw was found in SIPp. A remote attacker could exploit this by sending specially crafted Session Initiation Protocol (SIP) messages during an active call. This vulnerability, a NULL pointer dereference, can cause the application to crash, leading to a denial of service. Under specific conditions, it may also allow an attacker to execute unauthorized code, compromising the system's integrity and availability.

Severity

8.4 (High)


                        
                          CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

SSVC

Exploitation: none Automatable: no Technical Impact: total

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-01-23 19:03 UTC

CWE

CWE-476 - NULL Pointer Dereference

Assigner

fedora redhat root Scorecard

References

2 references

URL	Tags
https://access.redhat.com/security/cve/CVE-2026-0710	vdb-entryx_refsource_REDHAT
https://bugzilla.redhat.com/show_bug.cgi?id=2427788	issue-trackingx_refsource_REDHAT

Impacted products

1 product

Vendor	Product	Version
		Affected: 3.7.3 (semver)

Date Public

2026-01-08 00:00

Credits

Red Hat would like to thank ChenYiFan Liu, Fanny-wen, and Zhoufan Wen for reporting this issue.

Show details on NVD website

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GCVE-1988-2026-0421

Vulnerability from gna-1988 – Published: 2026-10-02 04:57 – Updated: 2026-10-02 04:57

Title

[NotCVE-2026-0017] game-music-emu (libgme) 0.6.5 and Earlier AY Loader NULL Pointer Dereference Allows Denial of Service

Summary

---------------------------------------------------------------------------- NotCVE Advisory — NotCVE-2026-0017 ---------------------------------------------------------------------------- [-] Summary: A NULL pointer dereference in the AY file loader of game-music-emu (libgme), the open-source video game music emulation library, allows an attacker who supplies a crafted .ay file to terminate any application that begins playback of it. CVSS:3.1 6.5 (AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H). [-] Affected: game-music-emu (libgme) 0.6.5 and earlier (present in 0.6.0 and 0.6.5), and master as of commit fe8da4b. Default builds; no fixed version is verified. [-] Technical Description: get_data() resolves the format's internal 16-bit relative offsets and returns 0 when an offset word is 0x0000, as well as when the target would fall outside the file buffer. The data-block copy loop in Ay_Emu::start_track_() (gme/Ay_Emu.cpp) uses that result without testing it: - the block's source pointer comes from get_data( file, blocks, 0 ) and is never compared against NULL; - the only guard before the copy, if ( len > uint32_t (file.end - in) ), compares len against the low 32 bits of the buffer's end address when in == NULL, so it does not reliably clamp; - execution reaches memcpy( mem.ram + addr, in, len ) with in == NULL. The process terminates with SIGSEGV. The invalid access is a read from address 0, so no attacker-controlled data is read or written; the impact is denial of service of the process that parses the file. Reachability: the AY handler is part of a default build (option(USE_GME_AY ... ON)) and is reached from the public entry point gme_start_track() via Music_Emu::start_track(). The condition is a two-byte field in an otherwise structurally valid file, so it survives type detection and track enumeration. FFmpeg documents optional use of the library; the researcher additionally names VLC, Kodi and Audacious as consumers. Commit ae10a8f ("Ay_Emu.cpp: Don't read farther than buffer allows", July 2026) changed get_data() to return 0 instead of asserting when the pointer is out of range. That widens the set of inputs that produce a NULL return in release builds and does not add the missing check. Weaknesses: CWE-476: NULL Pointer Dereference CWE-252: Unchecked Return Value CAPEC-165: File Manipulation [-] Credit: Discovered by netspacer1124 (https://github.com/netspacer1124). [-] Full Details and Updates: https://notcve.org/notcve/NotCVE-2026-0017 [-] Main References: https://github.com/libgme/game-music-emu https://github.com/libgme/game-music-emu/blob/0.6.5/gme/Ay_Emu.cpp https://github.com/libgme/game-music-emu/commit/ae10a8f [-] About NotCVE: NotCVE (https://notcve.org) assigns public, timestamped NotCVE IDs to vulnerabilities not acknowledged by vendors. Vendor will not assign a CVE? Request a NotCVE: https://notcve.org/form/ · Contributors: https://notcve.org/hall/ _______________________________________________ Sent through the Full Disclosure mailing list https://nmap.org/mailman/listinfo/fulldisclosure Web Archives & RSS: https://seclists.org/fulldisclosure/

Severity

No CVSS data available.

CWE

Assigner

VULNARCHIVE GNA-1988 Scorecard

References

12 references

URL	Tags
https://vuln.freearchive.org/archive/full-disclos…	technical-description
https://seclists.org/fulldisclosure/2026/Sep/93	technical-description
https://github.com/libgme/game-music-emu
https://github.com/libgme/game-music-emu/blob/0.6…
https://github.com/libgme/game-music-emu/commit/ae10a8f
https://github.com/netspacer1124
https://nmap.org/mailman/listinfo/fulldisclosure
https://notcve.org
https://notcve.org/form/
https://notcve.org/hall/
https://notcve.org/notcve/NotCVE-2026-0017
https://seclists.org/fulldisclosure/

Impacted products

1 product

Vendor	Product	Version
unknown	game-music-emu libgme	Affected: unknown

Credits

advisories

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CVE-2026-0401 (GCVE-0-2026-0401)

Vulnerability from cvelistv5 – Published: 2026-02-24 14:55 – Updated: 2026-02-24 15:34

Summary

A post-authentication NULL Pointer Dereference vulnerability in SonicOS allows a remote attacker to crash a firewall.

Severity

4.9 (Medium)


                        
                          CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-02-24 15:34 UTC

CWE

CWE-476 - NULL Pointer Dereference

Assigner

sonicwall mitre root Scorecard

References

1 reference

URL	Tags
https://psirt.global.sonicwall.com/vuln-detail/SN…	vendor-advisory

Impacted products

1 product

Vendor	Product	Version
SonicWall	SonicOS	Affected: 7.0.1-5169 and older versions Affected: 7.3.1-7013 and older versions Affected: 8.1.0-8017 and older versions

Date Public

2026-02-24 13:46

Credits

Vang3lis of VARAS@IIE N3vv of Red-Shield Security Lab

Show details on NVD website

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GCVE-1988-2026-0234

Vulnerability from gna-1988 – Published: 2026-09-08 08:13 – Updated: 2026-09-09 10:12

Title

CVE-2026-33150, CVE-2026-33179: libfuse io_uring memory safety vulnerabilities (use-after-free, NULL deref)

Summary

Two memory safety vulnerabilities in libfuse's io_uring code path (introduced in 3.18.0) have been fixed in libfuse 3.18.2. Only the io_uring transport is affected; the traditional /dev/fuse path is not. Affected versions: libfuse >= 3.18.0, < 3.18.2 Fixed in: libfuse 3.18.2 https://github.com/libfuse/libfuse/releases/tag/fuse-3.18.2 CVE-2026-33150: Use-After-Free Severity: High (CVSS 7.8) CWE: CWE-416 Use-after-free in io_uring session shutdown path. A local user can crash the FUSE daemon or potentially execute arbitrary code. Advisory: https://github.com/libfuse/libfuse/security/advisories/GHSA-qxv7-xrc2-qmfx Fix: https://github.com/libfuse/libfuse/commit/49fcd891a58f622c098e2ca67d66086f7b213836 Credit: Abhinav Agarwal (reporter) Remediation review: Akshat Sinha CVE-2026-33179: NULL Pointer Dereference + Memory Leak Severity: Moderate (CVSS 5.5) CWE: CWE-476 Missing NULL checks and error-path cleanup in io_uring queue initialization can crash the FUSE daemon on allocation failure and leak NUMA memory. Advisory: https://github.com/libfuse/libfuse/security/advisories/GHSA-x669-v3mq-r358 Fix: https://github.com/libfuse/libfuse/commit/7beb86c09b6ec5aab14dc25256ed8a5ad18554d7 Credit: Abhinav Agarwal (reporter) Remediation review: Akshat Sinha Both issues were reported privately to the libfuse maintainer and fixed in a coordinated release. Timeline: 2026-03-16 Use-after-free vulnerability reported to libfuse maintainer 2026-03-17 NULL deref vulnerability reported to libfuse maintainer 2026-03-18 Release 3.18.2 with fixes 2026-03-19 GHSA advisories published (CVE-2026-33150, CVE-2026-33179) -- Abhinav Agarwal _______________________________________________ Sent through the Full Disclosure mailing list https://nmap.org/mailman/listinfo/fulldisclosure Web Archives & RSS: https://seclists.org/fulldisclosure/

Severity

No CVSS data available.

CWE

Assigner

VULNARCHIVE GNA-1988 Scorecard

References

9 references

URL	Tags
https://vuln.freearchive.org/archive/full-disclos…	technical-description
https://seclists.org/fulldisclosure/2026/Mar/12	technical-description
https://github.com/libfuse/libfuse/commit/49fcd89…
https://github.com/libfuse/libfuse/commit/7beb86c…
https://github.com/libfuse/libfuse/releases/tag/f…
https://github.com/libfuse/libfuse/security/advis…
https://github.com/libfuse/libfuse/security/advis…
https://nmap.org/mailman/listinfo/fulldisclosure
https://seclists.org/fulldisclosure/

Impacted products

1 product

Vendor	Product	Version
Cve	CVE-2026-33150 CVE-2026-33179 libfuse	Affected: unknown

Credits

Abhinav Agarwal

Relationships

reference GCVE-1988-2026-0234 (this record)

related CVE-2026-33150
related CVE-2026-33179

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CVE-2025-69421 (GCVE-0-2025-69421)

Vulnerability from cvelistv5 – Published: 2026-01-27 16:01 – Updated: 2026-05-12 12:08

Title

NULL Pointer Dereference in PKCS12_item_decrypt_d2i_ex function

Summary

Issue summary: Processing a malformed PKCS#12 file can trigger a NULL pointer dereference in the PKCS12_item_decrypt_d2i_ex() function. Impact summary: A NULL pointer dereference can trigger a crash which leads to Denial of Service for an application processing PKCS#12 files. The PKCS12_item_decrypt_d2i_ex() function does not check whether the oct parameter is NULL before dereferencing it. When called from PKCS12_unpack_p7encdata() with a malformed PKCS#12 file, this parameter can be NULL, causing a crash. The vulnerability is limited to Denial of Service and cannot be escalated to achieve code execution or memory disclosure. Exploiting this issue requires an attacker to provide a malformed PKCS#12 file to an application that processes it. For that reason the issue was assessed as Low severity according to our Security Policy. The FIPS modules in 3.6, 3.5, 3.4, 3.3 and 3.0 are not affected by this issue, as the PKCS#12 implementation is outside the OpenSSL FIPS module boundary. OpenSSL 3.6, 3.5, 3.4, 3.3, 3.0, 1.1.1 and 1.0.2 are vulnerable to this issue.

Severity

7.5 (High)


                        
                          CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

SSVC

Exploitation: none Automatable: yes Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-01-28 15:17 UTC

CWE

CWE-476 - NULL Pointer Dereference

Assigner

openssl mitre root Scorecard

References

7 references

URL	Tags
https://openssl-library.org/news/secadv/20260127.txt	vendor-advisory
https://github.com/openssl/openssl/commit/a2dbc53…	patch
https://github.com/openssl/openssl/commit/3524a29…	patch
https://github.com/openssl/openssl/commit/6439869…	patch
https://github.com/openssl/openssl/commit/4bbc8d4…	patch
https://github.com/openssl/openssl/commit/36ecb49…	patch
https://cert-portal.siemens.com/productcert/html/…

Impacted products

2 products

Vendor	Product	Version
OpenSSL	OpenSSL	Affected: 3.6.0 , < 3.6.1 (semver) Affected: 3.5.0 , < 3.5.5 (semver) Affected: 3.4.0 , < 3.4.4 (semver) Affected: 3.3.0 , < 3.3.6 (semver) Affected: 3.0.0 , < 3.0.19 (semver) Affected: 1.1.1 , < 1.1.1ze (custom) Affected: 1.0.2 , < 1.0.2zn (custom)
Siemens	SIMATIC S7-1500 TM MFP - GNU/Linux subsystem	Affected: 0 , < * (custom)

Date Public

2026-01-27 14:00

Credits

Luigino Camastra (Aisle Research) Luigino Camastra (Aisle Research)

Show details on NVD website

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CVE-2025-69252 (GCVE-0-2025-69252)

Vulnerability from cvelistv5 – Published: 2026-02-23 23:56 – Updated: 2026-02-25 16:21

Title

free5GC has Null Pointer Dereference in UDM, Leading to Service Panic

Summary

free5gc UDM provides Unified Data Management (UDM) for free5GC, an open-source project for 5th generation (5G) mobile core networks. Versions up to and including 1.4.1 have a NULL Pointer Dereference vulnerability. Remote unauthenticated attackers can trigger a service panic (Denial of Service) by sending a crafted PUT request with an unexpected ueId, crashing the UDM service. All deployments of free5GC using the UDM component may be affected. free5gc/udm pull request 76 contains a fix for the issue. No direct workaround is available at the application level. Applying the official patch is recommended.

Severity

6.6 (Medium)


                        
                          CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U

SSVC

Exploitation: none Automatable: yes Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-02-25 16:20 UTC

CWE

CWE-476 - NULL Pointer Dereference

Assigner

GitHub_M mitre root Scorecard

References

4 references

URL	Tags
https://github.com/free5gc/free5gc/security/advis…	x_refsource_CONFIRM
https://github.com/free5gc/free5gc/issues/752	x_refsource_MISC
https://github.com/free5gc/udm/pull/76	x_refsource_MISC
https://github.com/free5gc/udm/commit/504b14458d1…	x_refsource_MISC

Impacted products

1 product

Vendor	Product	Version
free5gc	udm	Affected: <= 1.4.1

Show details on NVD website

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CVE-2025-68699 (GCVE-0-2025-68699)

Vulnerability from cvelistv5 – Published: 2026-02-04 19:25 – Updated: 2026-02-04 19:51

Title

NanoMQ $share/ Subscription Validation and Forwarding Parsing Inconsistency: NULL Pointer Increment Causes Crash

Summary

NanoMQ MQTT Broker (NanoMQ) is an all-around Edge Messaging Platform. In version 0.24.6, NanoMQ has a protocol parsing / forwarding inconsistency when handling shared subscriptions ($share/). A malformed SUBSCRIBE topic such as $share/ab (missing the second /) is not strictly validated during the subscription stage, so the invalid Topic Filter is stored into the subscription table. Later, when any PUBLISH matches this subscription, the broker send path (nmq_pipe_send_start_v4/v5) performs a second $share/ parsing using strchr() and increments the returned pointer without NULL checks. If the second strchr() returns NULL, sub_topic++ turns the pointer into an invalid address (e.g. 0x1). This invalid pointer is then passed into topic_filtern(), which triggers strlen() and crashes with SIGSEGV. The crash is stable and remotely triggerable. This issue has been patched in version 0.24.7.

Severity

6.5 (Medium)


                        
                          CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-02-04 19:43 UTC

CWE

CWE-476 - NULL Pointer Dereference

Assigner

GitHub_M mitre root Scorecard

References

2 references

URL	Tags
https://github.com/nanomq/nanomq/security/advisor…	x_refsource_CONFIRM
https://github.com/nanomq/nanomq/commit/89d68d678…	x_refsource_MISC

Impacted products

1 product

Vendor	Product	Version
nanomq	nanomq	Affected: = 0.24.6

Show details on NVD website

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CVE-2025-68274 (GCVE-0-2025-68274)

Vulnerability from cvelistv5 – Published: 2025-12-16 22:02 – Updated: 2025-12-17 21:15

Title

SIPGO library has response DoS vulnerability via nil pointer dereference

Summary

SIPGO is a library for writing SIP services in the GO language. Starting in version 0.3.0 and prior to version 1.0.0-alpha-1, a nil pointer dereference vulnerability is in the SIPGO library's `NewResponseFromRequest` function that affects all normal SIP operations. The vulnerability allows remote attackers to crash any SIP application by sending a single malformed SIP request without a To header. The vulnerability occurs when SIP message parsing succeeds for a request missing the To header, but the response creation code assumes the To header exists without proper nil checks. This affects routine operations like call setup, authentication, and message handling - not just error cases. This vulnerability affects all SIP applications using the sipgo library, not just specific configurations or edge cases, as long as they make use of the `NewResponseFromRequest` function. Version 1.0.0-alpha-1 contains a patch for the issue.

Severity

8.7 (High)


                        
                          CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N

SSVC

Exploitation: poc Automatable: yes Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2025-12-17 21:14 UTC

CWE

CWE-476 - NULL Pointer Dereference
CWE-755 - Improper Handling of Exceptional Conditions

Assigner

GitHub_M mitre root Scorecard

References

2 references

URL	Tags
https://github.com/emiago/sipgo/security/advisori…	x_refsource_CONFIRM
https://github.com/emiago/sipgo/commit/dc9669364a…	x_refsource_MISC

Impacted products

1 product

Vendor	Product	Version
emiago	sipgo	Affected: >= v0.3.0, < v1.0.0-alpha-1

Show details on NVD website

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CVE-2025-68141 (GCVE-0-2025-68141)

Vulnerability from cvelistv5 – Published: 2026-01-21 19:56 – Updated: 2026-01-22 16:50

Title

EVerest vulnerable to null pointer dereference during DC_ChargeLoopRes document deserialization

Summary

EVerest is an EV charging software stack. Prior to version 2025.10.0, during the deserialization of a `DC_ChargeLoopRes` message that includes Receipt as well as TaxCosts, the vector `<DetailedTax>tax_costs` in the target `Receipt` structure is accessed out of bounds. This occurs in the method `template <> void convert(const struct iso20_dc_DetailedTaxType& in, datatypes::DetailedTax& out)` which leads to a null pointer dereference and causes the module to terminate. The EVerest processes and all its modules shut down, affecting all EVSE. Version 2025.10.0 fixes the issue.

Severity

7.4 (High)


                        
                          CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-01-22 15:09 UTC

CWE

CWE-476 - NULL Pointer Dereference

Assigner

GitHub_M mitre root Scorecard

References

1 reference

URL	Tags
https://github.com/EVerest/everest-core/security/…	x_refsource_CONFIRM

Impacted products

1 product

Vendor	Product	Version
EVerest	everest-core	Affected: < 2025.10.0

Show details on NVD website

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CVE-2025-66646 (GCVE-0-2025-66646)

Vulnerability from cvelistv5 – Published: 2025-12-17 19:18 – Updated: 2025-12-17 20:30

Title

RIOT-OS has NULL pointer dereference in gnrc_ipv6_ext_frag_reass

Summary

RIOT is an open-source microcontroller operating system, designed to match the requirements of Internet of Things (IoT) devices and other embedded devices. A vulnerability was discovered in the IPv6 fragmentation reassembly implementation of RIOT OS v2025.07. When receiving an fragmented IPv6 packet with fragment offset 0 and an empty payload, the payload pointer is set to NULL. However, the implementation still tries to copy the payload into the reassembly buffer, resulting in a NULL pointer dereference which crashes the OS (DoS). To trigger the vulnerability, the `gnrc_ipv6_ext_frag` module must be enabled and the attacker must be able to send arbitrary IPv6 packets to the victim. RIOT OS v2025.10 fixes the issue.

Severity

1.7 (Low)


                        
                          CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:U

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2025-12-17 20:26 UTC

CWE

CWE-476 - NULL Pointer Dereference

Assigner

GitHub_M mitre root Scorecard

References

10 references

URL	Tags
https://github.com/RIOT-OS/RIOT/security/advisori…	x_refsource_CONFIRM
https://github.com/RIOT-OS/RIOT/blob/eb65305cf9f1…	x_refsource_MISC
https://github.com/RIOT-OS/RIOT/blob/eb65305cf9f1…	x_refsource_MISC
https://github.com/RIOT-OS/RIOT/blob/eb65305cf9f1…	x_refsource_MISC
https://github.com/RIOT-OS/RIOT/blob/eb65305cf9f1…	x_refsource_MISC
https://github.com/RIOT-OS/RIOT/blob/eb65305cf9f1…	x_refsource_MISC
https://github.com/RIOT-OS/RIOT/blob/eb65305cf9f1…	x_refsource_MISC
https://github.com/RIOT-OS/RIOT/blob/eb65305cf9f1…	x_refsource_MISC
https://github.com/RIOT-OS/RIOT/releases/tag/2025.10	x_refsource_MISC
https://github.com/user-attachments/files/2390399…	x_refsource_MISC

Impacted products

1 product

Vendor	Product	Version
RIOT-OS	RIOT	Affected: < 2025.10

Show details on NVD website

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  "cveMetadata": {
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    "assignerShortName": "GitHub_M",
    "cveId": "CVE-2025-66646",
    "datePublished": "2025-12-17T19:18:08.696Z",
    "dateReserved": "2025-12-05T20:23:19.595Z",
    "dateUpdated": "2025-12-17T20:30:49.970Z",
    "state": "PUBLISHED"
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  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

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.

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