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CWE-476: NULL Pointer Dereference, page 25

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

What the weakness is: CWE-476 at MITRE

Ask an AI about CWE-476

Show the promptExplain CWE-476: NULL Pointer Dereference and how to prevent and detect it in code. Use https://cwe.mitre.org/data/definitions/476.html and https://cve.bz/cve/cwe/476?via=ask-ai-copy for recent CVEs with this weakness. Cite the sources.

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  1. 4.3CVE-2025-65502EPSS 0.3%

    Null pointer dereference in add_ca_certs() in Cesanta Mongoose before 7.2 allows remote attackers to cause a denial of service via TLS initialization where SSL_CTX_get_cert_store() returns NULL.

  2. 4.3CVE-2025-65501EPSS 0.3%

    Null pointer dereference in coap_dtls_info_callback() in OISM libcoap 4.3.5 allows remote attackers to cause a denial of service via a DTLS handshake where SSL_get_app_data() returns NULL.

  3. 4.3CVE-2025-65500EPSS 0.3%

    NULL pointer dereference in coap_dtls_generate_cookie() in src/coap_openssl.c in OISM libcoap 4.3.5 allows remote attackers to cause a denial of service via a crafted DTLS handshake that triggers SSL_get_SSL_CTX() to return NULL.

  4. 4.3CVE-2025-65498EPSS 0.3%

    NULL pointer dereference in coap_dtls_generate_cookie() in src/coap_openssl.c in OISM libcoap 4.3.5 allows remote attackers to cause a denial of service via a crafted DTLS handshake that triggers SSL_get_SSL_CTX() to return NULL.

  5. 4.3CVE-2025-65497EPSS 0.3%

    NULL pointer dereference in coap_dtls_generate_cookie() in src/coap_openssl.c in OISM libcoap 4.3.5 allows remote attackers to cause a denial of service via a crafted DTLS handshake that triggers SSL_get_SSL_CTX() to return NULL.

  6. 4.3CVE-2025-65496EPSS 0.3%

    NULL pointer dereference in coap_dtls_generate_cookie() in src/coap_openssl.c in OISM libcoap 4.3.5 allows remote attackers to cause a denial of service via a crafted DTLS handshake that triggers SSL_get_SSL_CTX() to return NULL.

  7. 7.5CVE-2025-65494EPSS 0.3%

    NULL pointer dereference in get_san_or_cn_from_cert() in src/coap_openssl.c in OISM libcoap 4.3.5 allows remote attackers to cause a denial of service via a crafted X.509 certificate that causes sk_GENERAL_NAME_value() to return NULL.

  8. 7.5CVE-2025-65493EPSS 0.4%

    NULL pointer dereference in src/coap_openssl.c in OISM libcoap 4.3.5 allows remote attackers to cause a denial of service via a crafted DTLS/TLS connection that triggers BIO_get_data() to return NULL.

  9. 5.1CVE-2025-64169EPSS 0.4%

    Wazuh is a free and open source platform used for threat prevention, detection, and response. From version 3.7.0 to before 4.12.0, fim_alert() implementation does not check whether oldsum->md5 is NULL or not before dereferencing it. A comp…

  10. 5.5CVE-2025-62609EPSS 0.4%

    MLX is an array framework for machine learning on Apple silicon. Prior to version 0.29.4, there is a segmentation fault in mlx::core::load_gguf() when loading malicious GGUF files. Untrusted pointer from external gguflib library is derefer…

  11. 1.9CVE-2025-13425EPSS 0.1%

    A bug in the filesystem traversal fallback path causes fs/diriterate/diriterate.go:Next() to overindex an empty slice when ReadDir returns nil for an empty directory, resulting in a panic (index out of range) and an application crash (deni…

  12. 4.8CVE-2025-13397EPSS 0.2%

    A security vulnerability has been detected in mrubyc up to 3.4. This impacts the function mrbc_raw_realloc of the file src/alloc.c. Such manipulation of the argument ptr leads to null pointer dereference. An attack has to be approached loc…

  13. 5.5CVE-2025-63745EPSS 0.2%

    A NULL pointer dereference vulnerability was discovered in radare2 6.0.5 and earlier within the info() function of bin_ne.c. A crafted binary input can trigger a segmentation fault, leading to a denial of service when the tool processes ma…

  14. 4.3CVE-2025-63744EPSS 0.3%

    A NULL pointer dereference vulnerability was discovered in radare2 6.0.5 and earlier within the load() function of bin_dyldcache.c. Processing a crafted file can cause a segmentation fault and crash the program.

  15. 7.5CVE-2025-63929EPSS 0.4%

    A null pointer dereference vulnerability exists in airpig2011 IEC104 thru Commit be6d841 (2019-07-08). When multiple threads enqueue elements concurrently via IEC10X_PrioEnQueue, the function may dereference a null or freed queue pointer, …

  16. 6.8CVE-2025-26694EPSS 0.1%

    Null pointer dereference for some Intel(R) QAT Windows software before version 2.6.0. within Ring 3: User Applications may allow a denial of service. System software adversary with an authenticated user combined with a low complexity attac…

  17. 8.7CVE-2025-59777EPSS 0.5%

    NULL pointer dereference vulnerability exists in GNU libmicrohttpd v1.0.2 and earlier. The vulnerability was fixed in commit ff13abc on the master branch of the libmicrohttpd Git repository, after the v1.0.2 tag. A specially crafted packet…

  18. 5.3CVE-2025-7700EPSS 0.4%

    A flaw was found in FFmpeg’s ALS audio decoder, where it does not properly check for memory allocation failures. This can cause the application to crash when processing certain malformed audio files. While it does not lead to data theft or…

  19. 0.6CVE-2025-53412EPSS 0.5%

    A NULL pointer dereference vulnerability has been reported to affect File Station 5. If a remote attacker gains a user account, they can then exploit the vulnerability to launch a denial-of-service (DoS) attack. We have already fixed the …

  20. 1.3CVE-2025-53408EPSS 0.4%

    A NULL pointer dereference vulnerability has been reported to affect File Station 5. If a remote attacker gains a user account, they can then exploit the vulnerability to launch a denial-of-service (DoS) attack. We have already fixed the …

  21. 1.3CVE-2025-52865EPSS 0.4%

    A NULL pointer dereference vulnerability has been reported to affect File Station 5. If a remote attacker gains a user account, they can then exploit the vulnerability to launch a denial-of-service (DoS) attack. We have already fixed the …

  22. 5.3CVE-2025-47207EPSS 0.4%

    A NULL pointer dereference vulnerability has been reported to affect several product versions. If a remote attacker gains a user account, they can then exploit the vulnerability to launch a denial-of-service (DoS) attack. We have already …

  23. 7.5CVE-2025-27917EPSS 0.5%

    An issue was discovered in AnyDesk for Windows before 9.0.5, AnyDesk for macOS before 9.0.1, AnyDesk for Linux before 7.0.0, AnyDesk for iOS before 7.1.2, and AnyDesk for Android before 8.0.0. Remote Denial of Service can occur because of …

  24. 7.5CVE-2025-46404EPSS 0.6%

    A denial of service vulnerability exists in the lasso_provider_verify_saml_signature functionality of Entr'ouvert Lasso 2.5.1. A specially crafted SAML response can lead to a denial of service. An attacker can send a malformed SAML res…

  25. 7.5CVE-2025-54334EPSS 0.4%

    An issue was discovered in the NPU driver in Samsung Mobile Processor Exynos 1280, 2200, 1380, 1480, 2400, 1580, 2500. There is a NULL Pointer Dereference of hdev in the __npu_vertex_bootup function.

  26. 7.5CVE-2025-54332EPSS 0.4%

    An issue was discovered in NPU in Samsung Mobile Processor Exynos 1380 through July 2025. There is a NULL Pointer Dereference of profiler.node in the npu_vertex_profileoff function.

  27. 6.9CVE-2025-62791EPSS 0.3%

    Wazuh is a free and open source platform used for threat prevention, detection, and response. Prior to 4.11.0, DecodeCiscat() implementation does not check the return the value of cJSON_GetObjectItem() for a possible NULL value in case of …

  28. 6.9CVE-2025-62790EPSS 0.4%

    Wazuh is a free and open source platform used for threat prevention, detection, and response. Prior to 4.11.0, fim_fetch_attributes_state() implementation does not check whether time_string is NULL or not before calling strlen() on it. A c…

  29. 6.9CVE-2025-62789EPSS 0.4%

    Wazuh is a free and open source platform used for threat prevention, detection, and response. Prior to 4.11.0, fim_alert() implementation does not check whether the return value of ctime_r is NULL or not before calling strdup() on it. A co…

  30. 6.9CVE-2025-62785EPSS 0.4%

    Wazuh is a free and open source platform used for threat prevention, detection, and response. fillData() implementation does not check whether value is NULL or not before calling os_strdup() on it. A compromised agent can cause a crash of …

  31. 7.5CVE-2025-61107EPSS 0.6%

    FRRouting/frr from v4.0 through v10.4.1 was discovered to contain a NULL pointer dereference via the show_vty_ext_pref_pref_sid function at ospf_ext.c. This vulnerability allows attackers to cause a Denial of Service (DoS) via a crafted LS…

  32. 7.5CVE-2025-61106EPSS 0.6%

    FRRouting/frr from v4.0 through v10.4.1 was discovered to contain a NULL pointer dereference via the show_vty_ext_pref_pref_sid function at ospf_ext.c. This vulnerability allows attackers to cause a Denial of Service (DoS) via a crafted OS…

  33. 7.5CVE-2025-61104EPSS 0.6%

    FRRouting/frr from v4.0 through v10.4.1 was discovered to contain a NULL pointer dereference via the show_vty_unknown_tlv function at ospf_ext.c. This vulnerability allows attackers to cause a Denial of Service (DoS) via a crafted OSPF pac…

  34. 7.5CVE-2025-61103EPSS 0.6%

    FRRouting/frr from v4.0 through v10.4.1 was discovered to contain a NULL pointer dereference via the show_vty_ext_link_lan_adj_sid function at ospf_ext.c. This vulnerability allows attackers to cause a Denial of Service (DoS) via a crafted…

  35. 7.5CVE-2025-61105EPSS 0.5%

    FRRouting/frr from v4.0 through v10.4.1 was discovered to contain a NULL pointer dereference via the show_vty_link_info function at ospf_ext.c. This vulnerability allows attackers to cause a Denial of Service (DoS) via a crafted OSPF packe…

  36. 7.5CVE-2025-61102EPSS 0.5%

    FRRouting/frr from v4.0 through v10.4.1 was discovered to contain a NULL pointer dereference via the show_vty_ext_link_adj_sid function at ospf_ext.c. This vulnerability allows attackers to cause a Denial of Service (DoS) via a crafted OSP…

  37. 7.5CVE-2025-61101EPSS 0.5%

    FRRouting/frr from v4.0 through v10.4.1 was discovered to contain a NULL pointer dereference via the show_vty_ext_link_rmt_itf_addr function at ospf_ext.c. This vulnerability allows attackers to cause a Denial of Service (DoS) via a crafte…

  38. 7.5CVE-2025-61100EPSS 0.5%

    FRRouting/frr from v2.0 through v10.4.1 was discovered to contain a NULL pointer dereference via the ospf_opaque_lsa_dump function at ospf_opaque.c. This vulnerability allows attackers to cause a Denial of Service (DoS) under specific malf…

  39. 7.5CVE-2025-61099EPSS 0.5%

    FRRouting/frr from v2.0 through v10.4.1 was discovered to contain a NULL pointer dereference via the opaque_info_detail function at ospf_opaque.c. This vulnerability allows attackers to cause a Denial of Service (DoS) via a crafted LS Upda…

  40. 1.9CVE-2025-12207EPSS 0.2%

    A vulnerability has been found in Kamailio 5.5. This affects the function yyerror_at of the file src/core/cfg.y of the component Grammar Rule Handler. Such manipulation leads to null pointer dereference. The attack needs to be performed lo…

  41. 1.9CVE-2025-12206EPSS 0.2%

    A flaw has been found in Kamailio 5.5. The impacted element is the function rve_is_constant of the file src/core/rvalue.c. This manipulation causes null pointer dereference. The attack needs to be launched locally. The exploit has been pub…

  42. 5.0CVE-2025-23332EPSS 0.1%

    NVIDIA Display Driver for Linux contains a vulnerability in a kernel module, where an attacker might be able to trigger a null pointer deference. A successful exploit of this vulnerability might lead to denial of service.

  43. 5.5CVE-2025-23330EPSS 0.2%

    NVIDIA Display Driver for Linux contains a vulnerability where an attacker might be able to trigger a null pointer dereference. A successful exploit of this vulnerability might lead to denial of service.

  44. 5.5CVE-2025-23300EPSS 0.1%

    NVIDIA Display Driver for Linux contains a vulnerability in the kernel driver, where a user could cause a null pointer dereference by allocating a specific memory resource. A successful exploit of this vulnerability might lead to denial of…

  45. 7.5CVE-2025-50950EPSS 0.4%

    Audiofile v0.3.7 was discovered to contain a NULL pointer dereference via the ModuleState::setup function.

  46. 7.5CVE-2025-60336EPSS 1.8%

    A NULL pointer dereference in the sub_41773C function of TOTOLINK N600R v4.3.0cu.7866_B20220506 allows attackers to cause a Denial of Service (DoS) via a crafted HTTP request.

  47. 7.5CVE-2025-60335EPSS 2.1%

    A NULL pointer dereference in the main function of TOTOLINK N600R v4.3.0cu.7866_B20220506 allows attackers to cause a Denial of Service (DoS) via a crafted HTTP request.

  48. 7.5CVE-2025-60332EPSS 5.0%

    A NULL pointer dereference in the SetWLanRadioSettings function of D-Link DIR-823G A1 v1.0.2B05 allows attackers to cause a Denial of Service (DoS) via a crafted HTTP request.

  49. 1.9CVE-2022-4981EPSS 0.3%

    A vulnerability was detected in DCMTK up to 3.6.7. The impacted element is the function DcmQueryRetrieveConfig::readPeerList of the file /dcmqrcnf.cc of the component dcmqrscp. The manipulation results in null pointer dereference. The atta…

  50. 6.6CVE-2025-62409EPSS 0.5%

    Envoy is a cloud-native, open source edge and service proxy. Prior to 1.36.1, 1.35.5, 1.34.9, and 1.33.10, large requests and responses can potentially trigger TCP connection pool crashes due to flow control management in Envoy. It will ha…