CWE-476
AllowedNULL Pointer Dereference
Abstraction: Base · Status: Stable
The product dereferences a pointer that it expects to be valid but is NULL.
6769 vulnerabilities reference this CWE, most recent first.
GHSA-Q62Q-9VGF-P9J3
Vulnerability from github – Published: 2022-05-24 17:23 – Updated: 2022-12-03 15:30A vulnerability in the EGG archive parsing module in Clam AntiVirus (ClamAV) Software versions 0.102.0 - 0.102.3 could allow an unauthenticated, remote attacker to cause a denial of service condition on an affected device. The vulnerability is due to a null pointer dereference. An attacker could exploit this vulnerability by sending a crafted EGG file to an affected device. An exploit could allow the attacker to cause the ClamAV scanning process crash, resulting in a denial of service condition.
{
"affected": [],
"aliases": [
"CVE-2020-3481"
],
"database_specific": {
"cwe_ids": [
"CWE-476"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2020-07-20T18:15:00Z",
"severity": "MODERATE"
},
"details": "A vulnerability in the EGG archive parsing module in Clam AntiVirus (ClamAV) Software versions 0.102.0 - 0.102.3 could allow an unauthenticated, remote attacker to cause a denial of service condition on an affected device. The vulnerability is due to a null pointer dereference. An attacker could exploit this vulnerability by sending a crafted EGG file to an affected device. An exploit could allow the attacker to cause the ClamAV scanning process crash, resulting in a denial of service condition.",
"id": "GHSA-q62q-9vgf-p9j3",
"modified": "2022-12-03T15:30:27Z",
"published": "2022-05-24T17:23:59Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2020-3481"
},
{
"type": "WEB",
"url": "https://blog.clamav.net/2020/07/clamav-01024-security-patch-released.html"
},
{
"type": "WEB",
"url": "https://lists.debian.org/debian-lts-announce/2020/08/msg00010.html"
},
{
"type": "WEB",
"url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/IJ67VH37NCG25PICGWFWZHSVG7PBT7MC"
},
{
"type": "WEB",
"url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/QM7EXJHDEZJLWM2NKH6TCDXOBP5NNYIN"
},
{
"type": "WEB",
"url": "https://security.gentoo.org/glsa/202007-23"
},
{
"type": "WEB",
"url": "https://usn.ubuntu.com/4435-1"
},
{
"type": "WEB",
"url": "https://usn.ubuntu.com/4435-2"
}
],
"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-Q63G-PX5V-R7JV
Vulnerability from github – Published: 2026-06-03 18:33 – Updated: 2026-06-09 21:32In the Linux kernel, the following vulnerability has been resolved:
PCI: endpoint: Add missing NULL check for alloc_workqueue()
alloc_workqueue() can return NULL on memory allocation failure. Without proper error checking, this may lead to a NULL pointer dereference when queue_work() is later called with the NULL workqueue pointer in epf_ntb_epc_init().
Add a NULL check immediately after alloc_workqueue() and return -ENOMEM on failure to prevent the driver from loading with an invalid workqueue pointer.
{
"affected": [],
"aliases": [
"CVE-2025-71313"
],
"database_specific": {
"cwe_ids": [
"CWE-476"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2026-06-03T18:16:19Z",
"severity": "MODERATE"
},
"details": "In the Linux kernel, the following vulnerability has been resolved:\n\nPCI: endpoint: Add missing NULL check for alloc_workqueue()\n\nalloc_workqueue() can return NULL on memory allocation failure. Without\nproper error checking, this may lead to a NULL pointer dereference when\nqueue_work() is later called with the NULL workqueue pointer in\nepf_ntb_epc_init().\n\nAdd a NULL check immediately after alloc_workqueue() and return -ENOMEM on\nfailure to prevent the driver from loading with an invalid workqueue\npointer.",
"id": "GHSA-q63g-px5v-r7jv",
"modified": "2026-06-09T21:32:20Z",
"published": "2026-06-03T18:33:11Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2025-71313"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/03f336a869b3a3f119d3ae52ac9723739c7fb7b6"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/314eab6740bcda504ef978be599f805de05ce6de"
}
],
"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-Q6C3-CW35-V2GH
Vulnerability from github – Published: 2022-07-23 00:00 – Updated: 2022-07-30 00:00Radare2 v5.7.2 was discovered to contain a NULL pointer dereference via the function r_bin_file_xtr_load_buffer at bin/bfile.c. This vulnerability allows attackers to cause a Denial of Service (DOS) via a crafted binary file.
{
"affected": [],
"aliases": [
"CVE-2022-34520"
],
"database_specific": {
"cwe_ids": [
"CWE-476"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2022-07-22T15:15:00Z",
"severity": "MODERATE"
},
"details": "Radare2 v5.7.2 was discovered to contain a NULL pointer dereference via the function r_bin_file_xtr_load_buffer at bin/bfile.c. This vulnerability allows attackers to cause a Denial of Service (DOS) via a crafted binary file.",
"id": "GHSA-q6c3-cw35-v2gh",
"modified": "2022-07-30T00:00:43Z",
"published": "2022-07-23T00:00:22Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2022-34520"
},
{
"type": "WEB",
"url": "https://github.com/radareorg/radare2/issues/20354"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H",
"type": "CVSS_V3"
}
]
}
GHSA-Q6CW-2HR2-G93J
Vulnerability from github – Published: 2026-05-08 15:31 – Updated: 2026-05-21 18:33In the Linux kernel, the following vulnerability has been resolved:
firmware: stratix10-rsu: Fix NULL pointer dereference when RSU is disabled
When the Remote System Update (RSU) isn't enabled in the First Stage Boot Loader (FSBL), the driver encounters a NULL pointer dereference when excute svc_normal_to_secure_thread() thread, resulting in a kernel panic:
Unable to handle kernel NULL pointer dereference at virtual address 0000000000000008 Mem abort info: ... Data abort info: ... [0000000000000008] user address but active_mm is swapper Internal error: Oops: 0000000096000004 [#1] SMP Modules linked in: CPU: 0 UID: 0 PID: 79 Comm: svc_smc_hvc_thr Not tainted 6.19.0-rc8-yocto-standard+ #59 PREEMPT Hardware name: SoCFPGA Stratix 10 SoCDK (DT) pstate: 60000005 (nZCv daif -PAN -UAO -TCO -DIT -SSBS BTYPE=--) pc : svc_normal_to_secure_thread+0x38c/0x990 lr : svc_normal_to_secure_thread+0x144/0x990 ... Call trace: svc_normal_to_secure_thread+0x38c/0x990 (P) kthread+0x150/0x210 ret_from_fork+0x10/0x20 Code: 97cfc113 f9400260 aa1403e1 f9400400 (f9400402) ---[ end trace 0000000000000000 ]---
The issue occurs because rsu_send_async_msg() fails when RSU is not enabled in firmware, causing the channel to be freed via stratix10_svc_free_channel(). However, the probe function continues execution and registers svc_normal_to_secure_thread(), which subsequently attempts to access the already-freed channel, triggering the NULL pointer dereference.
Fix this by properly cleaning up the async client and returning early on failure, preventing the thread from being used with an invalid channel.
{
"affected": [],
"aliases": [
"CVE-2026-43410"
],
"database_specific": {
"cwe_ids": [
"CWE-476"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2026-05-08T15:16:52Z",
"severity": "MODERATE"
},
"details": "In the Linux kernel, the following vulnerability has been resolved:\n\nfirmware: stratix10-rsu: Fix NULL pointer dereference when RSU is disabled\n\nWhen the Remote System Update (RSU) isn\u0027t enabled in the First Stage\nBoot Loader (FSBL), the driver encounters a NULL pointer dereference when\nexcute svc_normal_to_secure_thread() thread, resulting in a kernel panic:\n\nUnable to handle kernel NULL pointer dereference at virtual address 0000000000000008\nMem abort info:\n...\nData abort info:\n...\n[0000000000000008] user address but active_mm is swapper\nInternal error: Oops: 0000000096000004 [#1] SMP\nModules linked in:\nCPU: 0 UID: 0 PID: 79 Comm: svc_smc_hvc_thr Not tainted 6.19.0-rc8-yocto-standard+ #59 PREEMPT\nHardware name: SoCFPGA Stratix 10 SoCDK (DT)\npstate: 60000005 (nZCv daif -PAN -UAO -TCO -DIT -SSBS BTYPE=--)\npc : svc_normal_to_secure_thread+0x38c/0x990\nlr : svc_normal_to_secure_thread+0x144/0x990\n...\nCall trace:\n svc_normal_to_secure_thread+0x38c/0x990 (P)\n kthread+0x150/0x210\n ret_from_fork+0x10/0x20\nCode: 97cfc113 f9400260 aa1403e1 f9400400 (f9400402)\n---[ end trace 0000000000000000 ]---\n\nThe issue occurs because rsu_send_async_msg() fails when RSU is not enabled\nin firmware, causing the channel to be freed via stratix10_svc_free_channel().\nHowever, the probe function continues execution and registers\nsvc_normal_to_secure_thread(), which subsequently attempts to access the\nalready-freed channel, triggering the NULL pointer dereference.\n\nFix this by properly cleaning up the async client and returning early on\nfailure, preventing the thread from being used with an invalid channel.",
"id": "GHSA-q6cw-2hr2-g93j",
"modified": "2026-05-21T18:33:06Z",
"published": "2026-05-08T15:31:27Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-43410"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/aa5739e0c51ad01c6e763ca89c1bfb58fc6ea71a"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/c45f7263100cece247dd3fa5fe277bd97fdb5687"
}
],
"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-Q6FC-WP2R-HVQ3
Vulnerability from github – Published: 2022-05-13 01:02 – Updated: 2025-06-09 18:31nghttp2 version >= 1.10.0 and nghttp2 <= v1.31.0 contains an Improper Input Validation CWE-20 vulnerability in ALTSVC frame handling that can result in segmentation fault leading to denial of service. This attack appears to be exploitable via network client. This vulnerability appears to have been fixed in >= 1.31.1.
{
"affected": [],
"aliases": [
"CVE-2018-1000168"
],
"database_specific": {
"cwe_ids": [
"CWE-20",
"CWE-476"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2018-05-08T15:29:00Z",
"severity": "HIGH"
},
"details": "nghttp2 version \u003e= 1.10.0 and nghttp2 \u003c= v1.31.0 contains an Improper Input Validation CWE-20 vulnerability in ALTSVC frame handling that can result in segmentation fault leading to denial of service. This attack appears to be exploitable via network client. This vulnerability appears to have been fixed in \u003e= 1.31.1.",
"id": "GHSA-q6fc-wp2r-hvq3",
"modified": "2025-06-09T18:31:56Z",
"published": "2022-05-13T01:02:32Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2018-1000168"
},
{
"type": "WEB",
"url": "https://access.redhat.com/errata/RHSA-2019:0366"
},
{
"type": "WEB",
"url": "https://access.redhat.com/errata/RHSA-2019:0367"
},
{
"type": "WEB",
"url": "https://lists.debian.org/debian-lts-announce/2021/10/msg00011.html"
},
{
"type": "WEB",
"url": "https://nghttp2.org/blog/2018/04/12/nghttp2-v1-31-1"
},
{
"type": "WEB",
"url": "https://nodejs.org/en/blog/vulnerability/june-2018-security-releases"
},
{
"type": "WEB",
"url": "http://www.securityfocus.com/bid/103952"
}
],
"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-Q6M5-RPFJ-C92F
Vulnerability from github – Published: 2024-05-19 09:34 – Updated: 2024-11-12 18:30In the Linux kernel, the following vulnerability has been resolved:
of: module: prevent NULL pointer dereference in vsnprintf()
In of_modalias(), we can get passed the str and len parameters which would cause a kernel oops in vsnprintf() since it only allows passing a NULL ptr when the length is also 0. Also, we need to filter out the negative values of the len parameter as these will result in a really huge buffer since snprintf() takes size_t parameter while ours is ssize_t...
Found by Linux Verification Center (linuxtesting.org) with the Svace static analysis tool.
{
"affected": [],
"aliases": [
"CVE-2024-35878"
],
"database_specific": {
"cwe_ids": [
"CWE-476"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2024-05-19T09:15:09Z",
"severity": "MODERATE"
},
"details": "In the Linux kernel, the following vulnerability has been resolved:\n\nof: module: prevent NULL pointer dereference in vsnprintf()\n\nIn of_modalias(), we can get passed the str and len parameters which would\ncause a kernel oops in vsnprintf() since it only allows passing a NULL ptr\nwhen the length is also 0. Also, we need to filter out the negative values\nof the len parameter as these will result in a really huge buffer since\nsnprintf() takes size_t parameter while ours is ssize_t...\n\nFound by Linux Verification Center (linuxtesting.org) with the Svace static\nanalysis tool.",
"id": "GHSA-q6m5-rpfj-c92f",
"modified": "2024-11-12T18:30:50Z",
"published": "2024-05-19T09:34:46Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2024-35878"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/544561dc56f7e69a053c25e11e6170f48bb97898"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/a1aa5390cc912934fee76ce80af5f940452fa987"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/e4a449368a2ce6d57a775d0ead27fc07f5a86e5b"
}
],
"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:L",
"type": "CVSS_V3"
}
]
}
GHSA-Q6PX-8PWJ-PPVH
Vulnerability from github – Published: 2024-03-26 18:32 – Updated: 2025-01-27 15:30In the Linux kernel, the following vulnerability has been resolved:
drm/amdgpu: Fix the null pointer when load rlc firmware
If the RLC firmware is invalid because of wrong header size, the pointer to the rlc firmware is released in function amdgpu_ucode_request. There will be a null pointer error in subsequent use. So skip validation to fix it.
{
"affected": [],
"aliases": [
"CVE-2024-26649"
],
"database_specific": {
"cwe_ids": [
"CWE-476"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2024-03-26T18:15:10Z",
"severity": "MODERATE"
},
"details": "In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/amdgpu: Fix the null pointer when load rlc firmware\n\nIf the RLC firmware is invalid because of wrong header size,\nthe pointer to the rlc firmware is released in function\namdgpu_ucode_request. There will be a null pointer error\nin subsequent use. So skip validation to fix it.",
"id": "GHSA-q6px-8pwj-ppvh",
"modified": "2025-01-27T15:30:55Z",
"published": "2024-03-26T18:32:07Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2024-26649"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/8b5bacce2d13dbe648f0bfd3f738ecce8db4978c"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/bc03c02cc1991a066b23e69bbcc0f66e8f1f7453"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/d3887448486caeef9687fb5dfebd4ff91e0f25aa"
}
],
"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-Q6RW-M9P2-PJQ2
Vulnerability from github – Published: 2026-10-09 06:31 – Updated: 2026-10-09 06:31OpenPrinting CUPS before 2.4.20 contains a NULL pointer dereference caused by repeated IPP group tags in job-creation requests. IPP parsing creates unnamed separator attributes with IPP_TAG_ZERO, but add_job() converts these separators to IPP_TAG_JOB. During job startup, get_options()/ipp_length() subsequently calls strlen() on a NULL attribute name, terminating cupsd and disrupting all queues. A single crafted Print-Job request can trigger the crash when the client can reach the scheduler and submit jobs to an accepting, enabled queue supporting the submitted document format. Anonymous submission is possible when permitted by listener and access-control configuration.
{
"affected": [],
"aliases": [
"CVE-2026-107890"
],
"database_specific": {
"cwe_ids": [
"CWE-476"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2026-10-09T05:16:44Z",
"severity": "LOW"
},
"details": "OpenPrinting CUPS before 2.4.20 contains a NULL pointer dereference caused by repeated IPP group tags in job-creation requests. IPP parsing creates unnamed separator attributes with IPP_TAG_ZERO, but add_job() converts these separators to IPP_TAG_JOB. During job startup, get_options()/ipp_length() subsequently calls strlen() on a NULL attribute name, terminating cupsd and disrupting all queues. A single crafted Print-Job request can trigger the crash when the client can reach the scheduler and submit jobs to an accepting, enabled queue supporting the submitted document format. Anonymous submission is possible when permitted by listener and access-control configuration.",
"id": "GHSA-q6rw-m9p2-pjq2",
"modified": "2026-10-09T06:31:15Z",
"published": "2026-10-09T06:31:15Z",
"references": [
{
"type": "WEB",
"url": "https://github.com/OpenPrinting/cups/security/advisories/GHSA-wjc4-qhjr-5m5x"
},
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-107890"
}
],
"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:L",
"type": "CVSS_V3"
}
]
}
GHSA-Q6X9-7RWW-JJGG
Vulnerability from github – Published: 2025-09-09 15:31 – Updated: 2025-10-20 21:30A denial-of-service security issue exists in the affected product and version. The security issue stems from the controller repeatedly attempting to forward messages. The issue could result in a major nonrecoverable fault on the controller.
{
"affected": [],
"aliases": [
"CVE-2025-9166"
],
"database_specific": {
"cwe_ids": [
"CWE-476"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2025-09-09T13:15:33Z",
"severity": "HIGH"
},
"details": "A denial-of-service security issue exists in the affected product and version. The security issue stems from the controller repeatedly attempting to forward messages. The issue could result in a major nonrecoverable fault on the controller.",
"id": "GHSA-q6x9-7rww-jjgg",
"modified": "2025-10-20T21:30:27Z",
"published": "2025-09-09T15:31:19Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2025-9166"
},
{
"type": "WEB",
"url": "https://www.rockwellautomation.com/en-us/trust-center/security-advisories/advisory.SD1747.html"
}
],
"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"
},
{
"score": "CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X",
"type": "CVSS_V4"
}
]
}
GHSA-Q725-VFRQ-PW65
Vulnerability from github – Published: 2022-05-14 01:00 – Updated: 2022-05-14 01:00LibRaw::copy_bayer in libraw_cxx.cpp in LibRaw 0.19.1 has a NULL pointer dereference.
{
"affected": [],
"aliases": [
"CVE-2018-20364"
],
"database_specific": {
"cwe_ids": [
"CWE-476"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2018-12-22T17:29:00Z",
"severity": "MODERATE"
},
"details": "LibRaw::copy_bayer in libraw_cxx.cpp in LibRaw 0.19.1 has a NULL pointer dereference.",
"id": "GHSA-q725-vfrq-pw65",
"modified": "2022-05-14T01:00:53Z",
"published": "2022-05-14T01:00:53Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2018-20364"
},
{
"type": "WEB",
"url": "https://github.com/LibRaw/LibRaw/issues/194"
},
{
"type": "WEB",
"url": "https://usn.ubuntu.com/3989-1"
},
{
"type": "WEB",
"url": "http://www.securityfocus.com/bid/106299"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.0/AV:N/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.