CWE-476
AllowedNULL Pointer Dereference
Abstraction: Base · Status: Stable
The product dereferences a pointer that it expects to be valid but is NULL.
6305 vulnerabilities reference this CWE, most recent first.
GHSA-CX2J-R37J-67J2
Vulnerability from github – Published: 2026-04-24 15:32 – Updated: 2026-04-27 21:30In the Linux kernel, the following vulnerability has been resolved:
i2c: cp2615: fix serial string NULL-deref at probe
The cp2615 driver uses the USB device serial string as the i2c adapter name but does not make sure that the string exists.
Verify that the device has a serial number before accessing it to avoid triggering a NULL-pointer dereference (e.g. with malicious devices).
{
"affected": [],
"aliases": [
"CVE-2026-31549"
],
"database_specific": {
"cwe_ids": [
"CWE-476"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2026-04-24T15:16:29Z",
"severity": "MODERATE"
},
"details": "In the Linux kernel, the following vulnerability has been resolved:\n\ni2c: cp2615: fix serial string NULL-deref at probe\n\nThe cp2615 driver uses the USB device serial string as the i2c adapter\nname but does not make sure that the string exists.\n\nVerify that the device has a serial number before accessing it to avoid\ntriggering a NULL-pointer dereference (e.g. with malicious devices).",
"id": "GHSA-cx2j-r37j-67j2",
"modified": "2026-04-27T21:30:47Z",
"published": "2026-04-24T15:32:33Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-31549"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/13ccf9b106bba121728f1625c4375a1bd8f5c5a3"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/4a22af879172336370ae3e81e7f65fb2f69472ee"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/69aece634a7eebafd9a596e5494d52facf6f26ec"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/a9778298f47036866ea15eeb17242e8a4612580f"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/aa79f996eb41e95aed85a1bd7f56bcd6a3842008"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/e68c267787778bcdf3d91b06f794faaba7f0d1d1"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/efe996bcfe50c2dcc6cf65c574285713b722ced7"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
"type": "CVSS_V3"
}
]
}
GHSA-CX3H-F553-X7GW
Vulnerability from github – Published: 2025-11-24 15:30 – Updated: 2025-11-24 21:30Null 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.
{
"affected": [],
"aliases": [
"CVE-2025-65501"
],
"database_specific": {
"cwe_ids": [
"CWE-476"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2025-11-24T14:15:47Z",
"severity": "MODERATE"
},
"details": "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.",
"id": "GHSA-cx3h-f553-x7gw",
"modified": "2025-11-24T21:30:58Z",
"published": "2025-11-24T15:30:29Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2025-65501"
},
{
"type": "WEB",
"url": "https://github.com/obgm/libcoap/issues/1748"
},
{
"type": "WEB",
"url": "https://github.com/obgm/libcoap/pull/1750"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L",
"type": "CVSS_V3"
}
]
}
GHSA-CX5J-3Q3C-FG8H
Vulnerability from github – Published: 2024-04-09 18:30 – Updated: 2024-04-09 18:30Windows Kerberos Denial of Service Vulnerability
{
"affected": [],
"aliases": [
"CVE-2024-26183"
],
"database_specific": {
"cwe_ids": [
"CWE-476"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2024-04-09T17:15:36Z",
"severity": "MODERATE"
},
"details": "Windows Kerberos Denial of Service Vulnerability",
"id": "GHSA-cx5j-3q3c-fg8h",
"modified": "2024-04-09T18:30:25Z",
"published": "2024-04-09T18:30:25Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2024-26183"
},
{
"type": "WEB",
"url": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2024-26183"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
"type": "CVSS_V3"
}
]
}
GHSA-CX6C-45WP-F5PR
Vulnerability from github – Published: 2026-04-03 18:31 – Updated: 2026-05-26 15:32In the Linux kernel, the following vulnerability has been resolved:
net/rose: fix NULL pointer dereference in rose_transmit_link on reconnect
syzkaller reported a bug [1], and the reproducer is available at [2].
ROSE sockets use four sk->sk_state values: TCP_CLOSE, TCP_LISTEN, TCP_SYN_SENT, and TCP_ESTABLISHED. rose_connect() already rejects calls for TCP_ESTABLISHED (-EISCONN) and TCP_CLOSE with SS_CONNECTING (-ECONNREFUSED), but lacks a check for TCP_SYN_SENT.
When rose_connect() is called a second time while the first connection attempt is still in progress (TCP_SYN_SENT), it overwrites rose->neighbour via rose_get_neigh(). If that returns NULL, the socket is left with rose->state == ROSE_STATE_1 but rose->neighbour == NULL. When the socket is subsequently closed, rose_release() sees ROSE_STATE_1 and calls rose_write_internal() -> rose_transmit_link(skb, NULL), causing a NULL pointer dereference.
Per connect(2), a second connect() while a connection is already in progress should return -EALREADY. Add this missing check for TCP_SYN_SENT to complete the state validation in rose_connect().
[1] https://syzkaller.appspot.com/bug?extid=d00f90e0af54102fb271 [2] https://gist.github.com/mrpre/9e6779e0d13e2c66779b1653fef80516
{
"affected": [],
"aliases": [
"CVE-2026-23460"
],
"database_specific": {
"cwe_ids": [
"CWE-476"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2026-04-03T16:16:32Z",
"severity": "MODERATE"
},
"details": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet/rose: fix NULL pointer dereference in rose_transmit_link on reconnect\n\nsyzkaller reported a bug [1], and the reproducer is available at [2].\n\nROSE sockets use four sk-\u003esk_state values: TCP_CLOSE, TCP_LISTEN,\nTCP_SYN_SENT, and TCP_ESTABLISHED. rose_connect() already rejects\ncalls for TCP_ESTABLISHED (-EISCONN) and TCP_CLOSE with SS_CONNECTING\n(-ECONNREFUSED), but lacks a check for TCP_SYN_SENT.\n\nWhen rose_connect() is called a second time while the first connection\nattempt is still in progress (TCP_SYN_SENT), it overwrites\nrose-\u003eneighbour via rose_get_neigh(). If that returns NULL, the socket\nis left with rose-\u003estate == ROSE_STATE_1 but rose-\u003eneighbour == NULL.\nWhen the socket is subsequently closed, rose_release() sees\nROSE_STATE_1 and calls rose_write_internal() -\u003e\nrose_transmit_link(skb, NULL), causing a NULL pointer dereference.\n\nPer connect(2), a second connect() while a connection is already in\nprogress should return -EALREADY. Add this missing check for\nTCP_SYN_SENT to complete the state validation in rose_connect().\n\n[1] https://syzkaller.appspot.com/bug?extid=d00f90e0af54102fb271\n[2] https://gist.github.com/mrpre/9e6779e0d13e2c66779b1653fef80516",
"id": "GHSA-cx6c-45wp-f5pr",
"modified": "2026-05-26T15:32:06Z",
"published": "2026-04-03T18:31:22Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-23460"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/0c3e8bff808f17ad37a51d8e719eed22c7863120"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/0c9fb70a206a8734e10468ecc24d57c7596cf64e"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/508f49ccbe0329641bb681f7d0052bb4e5943252"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/a12254050e3050f1011cd24f3b880a6882d0139d"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/a753844d2a8136f090123c8fb1ff6c7f6ee7c2b3"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/c2ab74c12932e52cfa1e7e4582d42b0c8bec96c7"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/c85fe6580e86947ca07907ebf4363a73c156fda7"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/e1f0a18c9564cdb16523c802e2c6fe5874e3d944"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
"type": "CVSS_V3"
}
]
}
GHSA-CX6F-43C8-3PCF
Vulnerability from github – Published: 2023-11-02 21:30 – Updated: 2023-11-02 21:30NVIDIA vGPU software for Windows and Linux contains a vulnerability in the Virtual GPU Manager (vGPU plugin), where a malicious user in the guest VM can cause a NULL-pointer dereference, which may lead to denial of service.
{
"affected": [],
"aliases": [
"CVE-2023-31021"
],
"database_specific": {
"cwe_ids": [
"CWE-476"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2023-11-02T19:15:41Z",
"severity": "MODERATE"
},
"details": "NVIDIA vGPU software for Windows and Linux contains a vulnerability in the Virtual GPU Manager (vGPU plugin), where a malicious user in the guest VM can cause a NULL-pointer dereference, which may lead to denial of service.",
"id": "GHSA-cx6f-43c8-3pcf",
"modified": "2023-11-02T21:30:19Z",
"published": "2023-11-02T21:30:19Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2023-31021"
},
{
"type": "WEB",
"url": "https://nvidia.custhelp.com/app/answers/detail/a_id/5491"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
"type": "CVSS_V3"
}
]
}
GHSA-CX9F-VR2H-M23W
Vulnerability from github – Published: 2026-05-27 15:33 – Updated: 2026-06-16 03:30In the Linux kernel, the following vulnerability has been resolved:
ACPICA: Fix NULL pointer dereference in acpi_ev_address_space_dispatch()
Cover a missed execution path with a new check.
{
"affected": [],
"aliases": [
"CVE-2026-45982"
],
"database_specific": {
"cwe_ids": [
"CWE-476"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2026-05-27T14:17:15Z",
"severity": "MODERATE"
},
"details": "In the Linux kernel, the following vulnerability has been resolved:\n\nACPICA: Fix NULL pointer dereference in acpi_ev_address_space_dispatch()\n\nCover a missed execution path with a new check.",
"id": "GHSA-cx9f-vr2h-m23w",
"modified": "2026-06-16T03:30:33Z",
"published": "2026-05-27T15:33:19Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-45982"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/56024dbe8c76cff22f53ba81a95d9efd4d0c9c44"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/7d99cbe717c1b15a66559215df32312d8cf7e525"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/b24595b86920911d2b04f862422b896a0620e9ad"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/cce354524da4d10fd2c7eb835e2e4e8ab8c0ce97"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/f2cf475d23b8486dfa414f7ac09f918ffd3c32a5"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/f851e03bce968ff9b3faad1b616062e1244fd38d"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
"type": "CVSS_V3"
}
]
}
GHSA-CXJM-J999-J645
Vulnerability from github – Published: 2022-05-13 01:27 – Updated: 2022-05-13 01:27In Wireshark 2.6.0 to 2.6.4 and 2.4.0 to 2.4.10, the PVFS dissector could crash. This was addressed in epan/dissectors/packet-pvfs2.c by preventing a NULL pointer dereference.
{
"affected": [],
"aliases": [
"CVE-2018-19624"
],
"database_specific": {
"cwe_ids": [
"CWE-476"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2018-11-29T04:29:00Z",
"severity": "MODERATE"
},
"details": "In Wireshark 2.6.0 to 2.6.4 and 2.4.0 to 2.4.10, the PVFS dissector could crash. This was addressed in epan/dissectors/packet-pvfs2.c by preventing a NULL pointer dereference.",
"id": "GHSA-cxjm-j999-j645",
"modified": "2022-05-13T01:27:50Z",
"published": "2022-05-13T01:27:50Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2018-19624"
},
{
"type": "WEB",
"url": "https://bugs.wireshark.org/bugzilla/show_bug.cgi?id=15280"
},
{
"type": "WEB",
"url": "https://code.wireshark.org/review/gitweb?p=wireshark.git;a=commit;h=3e319db1107b08fc3be804b6d449143ec9aa0dec"
},
{
"type": "WEB",
"url": "https://lists.debian.org/debian-lts-announce/2019/01/msg00010.html"
},
{
"type": "WEB",
"url": "https://www.debian.org/security/2018/dsa-4359"
},
{
"type": "WEB",
"url": "https://www.oracle.com/security-alerts/cpuapr2020.html"
},
{
"type": "WEB",
"url": "https://www.wireshark.org/security/wnpa-sec-2018-56.html"
},
{
"type": "WEB",
"url": "http://lists.opensuse.org/opensuse-security-announce/2020-03/msg00027.html"
},
{
"type": "WEB",
"url": "http://www.securityfocus.com/bid/106051"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H",
"type": "CVSS_V3"
}
]
}
GHSA-CXVJ-JX5H-9XF2
Vulnerability from github – Published: 2022-10-18 12:00 – Updated: 2022-10-18 12:00An Unchecked Return Value to NULL Pointer Dereference vulnerability in Packet Forwarding Engine (PFE) of Juniper Networks Junos OS allows an unauthenticated, network-based attacker to cause a Denial of Service (DoS). On SRX Series if Unified Threat Management (UTM) Enhanced Content Filtering (CF) and AntiVirus (AV) are enabled together and the system processes specific valid transit traffic the Packet Forwarding Engine (PFE) will crash and restart. This issue affects Juniper Networks Junos OS 21.4 versions prior to 21.4R1-S2, 21.4R2 on SRX Series. This issue does not affect Juniper Networks Junos OS versions prior to 21.4R1.
{
"affected": [],
"aliases": [
"CVE-2022-22231"
],
"database_specific": {
"cwe_ids": [
"CWE-252",
"CWE-476",
"CWE-690"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2022-10-18T03:15:00Z",
"severity": "HIGH"
},
"details": "An Unchecked Return Value to NULL Pointer Dereference vulnerability in Packet Forwarding Engine (PFE) of Juniper Networks Junos OS allows an unauthenticated, network-based attacker to cause a Denial of Service (DoS). On SRX Series if Unified Threat Management (UTM) Enhanced Content Filtering (CF) and AntiVirus (AV) are enabled together and the system processes specific valid transit traffic the Packet Forwarding Engine (PFE) will crash and restart. This issue affects Juniper Networks Junos OS 21.4 versions prior to 21.4R1-S2, 21.4R2 on SRX Series. This issue does not affect Juniper Networks Junos OS versions prior to 21.4R1.",
"id": "GHSA-cxvj-jx5h-9xf2",
"modified": "2022-10-18T12:00:30Z",
"published": "2022-10-18T12:00:30Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2022-22231"
},
{
"type": "WEB",
"url": "https://kb.juniper.net/JSA69885"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
"type": "CVSS_V3"
}
]
}
GHSA-F24C-2C3H-F7JX
Vulnerability from github – Published: 2026-05-26 18:31 – Updated: 2026-05-26 18:31IBM HTTP Server 8.5, and 9.0 is vulnerable to denial of service via the optional module mod_ibm_upload.
{
"affected": [],
"aliases": [
"CVE-2026-8850"
],
"database_specific": {
"cwe_ids": [
"CWE-476"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2026-05-26T17:16:55Z",
"severity": "HIGH"
},
"details": "IBM HTTP Server 8.5, and 9.0 is vulnerable to denial of service via the optional module mod_ibm_upload.",
"id": "GHSA-f24c-2c3h-f7jx",
"modified": "2026-05-26T18:31:48Z",
"published": "2026-05-26T18:31:48Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-8850"
},
{
"type": "WEB",
"url": "https://www.ibm.com/support/pages/node/7274065"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
"type": "CVSS_V3"
}
]
}
GHSA-F24F-2MRR-C8P6
Vulnerability from github – Published: 2022-05-17 02:55 – Updated: 2025-04-20 03:34The GraphicsStack::TGraphicsStackElement::~TGraphicsStackElement function in graphicsstack.h in PoDoFo 0.9.5 allows remote attackers to cause a denial of service (NULL pointer dereference) via a crafted file.
{
"affected": [],
"aliases": [
"CVE-2017-6841"
],
"database_specific": {
"cwe_ids": [
"CWE-476"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2017-03-15T14:59:00Z",
"severity": "MODERATE"
},
"details": "The GraphicsStack::TGraphicsStackElement::~TGraphicsStackElement function in graphicsstack.h in PoDoFo 0.9.5 allows remote attackers to cause a denial of service (NULL pointer dereference) via a crafted file.",
"id": "GHSA-f24f-2mrr-c8p6",
"modified": "2025-04-20T03:34:08Z",
"published": "2022-05-17T02:55:00Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2017-6841"
},
{
"type": "WEB",
"url": "https://blogs.gentoo.org/ago/2017/03/02/podofo-null-pointer-dereference-in-graphicsstacktgraphicsstackelementtgraphicsstackelement-graphicsstack-h"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H",
"type": "CVSS_V3"
}
]
}
Mitigation MIT-56
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
Select a programming language that is not susceptible to these issues.
Mitigation
Check the results of all functions that return a value and verify that the value is non-null before acting upon it.
Mitigation
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
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.