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-PWX9-2GVJ-242V
Vulnerability from github – Published: 2023-04-25 15:30 – Updated: 2024-02-04 09:30x86 shadow paging arbitrary pointer dereference In environments where host assisted address translation is necessary but Hardware Assisted Paging (HAP) is unavailable, Xen will run guests in so called shadow mode. Due to too lax a check in one of the hypervisor routines used for shadow page handling it is possible for a guest with a PCI device passed through to cause the hypervisor to access an arbitrary pointer partially under guest control.
{
"affected": [],
"aliases": [
"CVE-2022-42335"
],
"database_specific": {
"cwe_ids": [
"CWE-476"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2023-04-25T13:15:09Z",
"severity": "HIGH"
},
"details": "x86 shadow paging arbitrary pointer dereference In environments where host assisted address translation is necessary but Hardware Assisted Paging (HAP) is unavailable, Xen will run guests in so called shadow mode. Due to too lax a check in one of the hypervisor routines used for shadow page handling it is possible for a guest with a PCI device passed through to cause the hypervisor to access an arbitrary pointer partially under guest control.",
"id": "GHSA-pwx9-2gvj-242v",
"modified": "2024-02-04T09:30:40Z",
"published": "2023-04-25T15:30:27Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2022-42335"
},
{
"type": "WEB",
"url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/PSPFWSY6UOPGMADQGOGN2PAAS5LJRPTG"
},
{
"type": "WEB",
"url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/PSPFWSY6UOPGMADQGOGN2PAAS5LJRPTG"
},
{
"type": "WEB",
"url": "https://security.gentoo.org/glsa/202402-07"
},
{
"type": "WEB",
"url": "https://xenbits.xenproject.org/xsa/advisory-430.txt"
},
{
"type": "WEB",
"url": "http://www.openwall.com/lists/oss-security/2023/04/25/1"
},
{
"type": "WEB",
"url": "http://xenbits.xen.org/xsa/advisory-430.html"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
"type": "CVSS_V3"
}
]
}
GHSA-PWXX-FX4J-FFV3
Vulnerability from github – Published: 2024-04-02 09:30 – Updated: 2024-10-31 18:31In the Linux kernel, the following vulnerability has been resolved:
fs/ntfs3: Fix an NULL dereference bug
The issue here is when this is called from ntfs_load_attr_list(). The "size" comes from le32_to_cpu(attr->res.data_size) so it can't overflow on a 64bit systems but on 32bit systems the "+ 1023" can overflow and the result is zero. This means that the kmalloc will succeed by returning the ZERO_SIZE_PTR and then the memcpy() will crash with an Oops on the next line.
{
"affected": [],
"aliases": [
"CVE-2023-52631"
],
"database_specific": {
"cwe_ids": [
"CWE-476"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2024-04-02T07:15:40Z",
"severity": "MODERATE"
},
"details": "In the Linux kernel, the following vulnerability has been resolved:\n\nfs/ntfs3: Fix an NULL dereference bug\n\nThe issue here is when this is called from ntfs_load_attr_list(). The\n\"size\" comes from le32_to_cpu(attr-\u003eres.data_size) so it can\u0027t overflow\non a 64bit systems but on 32bit systems the \"+ 1023\" can overflow and\nthe result is zero. This means that the kmalloc will succeed by\nreturning the ZERO_SIZE_PTR and then the memcpy() will crash with an\nOops on the next line.",
"id": "GHSA-pwxx-fx4j-ffv3",
"modified": "2024-10-31T18:31:16Z",
"published": "2024-04-02T09:30:40Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2023-52631"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/686820fe141ea0220fc6fdfc7e5694f915cf64b2"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/ae4acad41b0f93f1c26cc0fc9135bb79d8282d0b"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/b2dd7b953c25ffd5912dda17e980e7168bebcf6c"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/ec1bedd797588fe38fc11cba26d77bb1d9b194c6"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/fb7bcd1722bc9bc55160378f5f99c01198fd14a7"
}
],
"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-PX47-FMM9-RXW4
Vulnerability from github – Published: 2026-05-08 15:31 – Updated: 2026-05-15 18:30In the Linux kernel, the following vulnerability has been resolved:
ACPI: processor: Fix NULL-pointer dereference in acpi_processor_errata_piix4()
In acpi_processor_errata_piix4(), the pointer dev is first assigned an IDE device and then reassigned an ISA device:
dev = pci_get_subsys(..., PCI_DEVICE_ID_INTEL_82371AB, ...); dev = pci_get_subsys(..., PCI_DEVICE_ID_INTEL_82371AB_0, ...);
If the first lookup succeeds but the second fails, dev becomes NULL. This leads to a potential null-pointer dereference when dev_dbg() is called:
if (errata.piix4.bmisx) dev_dbg(&dev->dev, ...);
To prevent this, use two temporary pointers and retrieve each device independently, avoiding overwriting dev with a possible NULL value.
[ rjw: Subject adjustment, added an empty code line ]
{
"affected": [],
"aliases": [
"CVE-2026-43313"
],
"database_specific": {
"cwe_ids": [
"CWE-476"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2026-05-08T14:16:39Z",
"severity": "MODERATE"
},
"details": "In the Linux kernel, the following vulnerability has been resolved:\n\nACPI: processor: Fix NULL-pointer dereference in acpi_processor_errata_piix4()\n\nIn acpi_processor_errata_piix4(), the pointer dev is first assigned an IDE\ndevice and then reassigned an ISA device:\n\n dev = pci_get_subsys(..., PCI_DEVICE_ID_INTEL_82371AB, ...);\n dev = pci_get_subsys(..., PCI_DEVICE_ID_INTEL_82371AB_0, ...);\n\nIf the first lookup succeeds but the second fails, dev becomes NULL. This\nleads to a potential null-pointer dereference when dev_dbg() is called:\n\n if (errata.piix4.bmisx)\n dev_dbg(\u0026dev-\u003edev, ...);\n\nTo prevent this, use two temporary pointers and retrieve each device\nindependently, avoiding overwriting dev with a possible NULL value.\n\n[ rjw: Subject adjustment, added an empty code line ]",
"id": "GHSA-px47-fmm9-rxw4",
"modified": "2026-05-15T18:30:30Z",
"published": "2026-05-08T15:31:23Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-43313"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/01e8751b37a366b1ca561add0042f2ceb18c03bf"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/0398b641be2b66c2fc7e0163c606ef19372e7ad5"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/06724a60cfa9767ea90b0f5d3dfb5cdd251b64f5"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/29f60d3d06818d40118a30d663231f027ae87a05"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/ad86ac604f8391c0212a91412d4f764c7a85f254"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/b803811485ac0b2f774b6bf3abc8b999ba3b7033"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/f132e089fe89cadc2098991f0a3cb05c3f824ac6"
}
],
"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-PX4C-XGQG-MG27
Vulnerability from github – Published: 2022-05-14 03:33 – Updated: 2025-04-20 03:48drivers/net/usb/asix_devices.c in the Linux kernel through 4.13.11 allows local users to cause a denial of service (NULL pointer dereference and system crash) or possibly have unspecified other impact via a crafted USB device.
{
"affected": [],
"aliases": [
"CVE-2017-16647"
],
"database_specific": {
"cwe_ids": [
"CWE-476"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2017-11-07T23:29:00Z",
"severity": "HIGH"
},
"details": "drivers/net/usb/asix_devices.c in the Linux kernel through 4.13.11 allows local users to cause a denial of service (NULL pointer dereference and system crash) or possibly have unspecified other impact via a crafted USB device.",
"id": "GHSA-px4c-xgqg-mg27",
"modified": "2025-04-20T03:48:09Z",
"published": "2022-05-14T03:33:15Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2017-16647"
},
{
"type": "WEB",
"url": "https://groups.google.com/d/msg/syzkaller/_9a6pd-p_0E/OnmnplQuAgAJ"
},
{
"type": "WEB",
"url": "https://patchwork.ozlabs.org/patch/834686"
},
{
"type": "WEB",
"url": "https://usn.ubuntu.com/3617-1"
},
{
"type": "WEB",
"url": "https://usn.ubuntu.com/3617-2"
},
{
"type": "WEB",
"url": "https://usn.ubuntu.com/3617-3"
},
{
"type": "WEB",
"url": "http://www.securityfocus.com/bid/101767"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.0/AV:P/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
"type": "CVSS_V3"
}
]
}
GHSA-PX5W-PF7Q-23JQ
Vulnerability from github – Published: 2025-09-15 15:31 – Updated: 2025-12-04 15:30In the Linux kernel, the following vulnerability has been resolved:
hwmon: (pmbus_core) Fix NULL pointer dereference
Pass i2c_client to _pmbus_is_enabled to drop the assumption that a regulator device is passed in.
This will fix the issue of a NULL pointer dereference when called from _pmbus_get_flags.
{
"affected": [],
"aliases": [
"CVE-2023-53206"
],
"database_specific": {
"cwe_ids": [
"CWE-476"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2025-09-15T15:15:47Z",
"severity": "MODERATE"
},
"details": "In the Linux kernel, the following vulnerability has been resolved:\n\nhwmon: (pmbus_core) Fix NULL pointer dereference\n\nPass i2c_client to _pmbus_is_enabled to drop the assumption\nthat a regulator device is passed in.\n\nThis will fix the issue of a NULL pointer dereference when called from\n_pmbus_get_flags.",
"id": "GHSA-px5w-pf7q-23jq",
"modified": "2025-12-04T15:30:31Z",
"published": "2025-09-15T15:31:28Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2023-53206"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/0bd66784274a287beada2933c2c0fa3a0ddae0d7"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/7444253cacd92412bc8d33d1c9b5401f52cdf0e2"
}
],
"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-PX6R-PJWR-J383
Vulnerability from github – Published: 2022-05-14 01:15 – Updated: 2022-05-14 01:15An issue was discovered in Xpdf 4.01.01. There is a NULL pointer dereference in the function Gfx::opSetExtGState in Gfx.cc.
{
"affected": [],
"aliases": [
"CVE-2019-10022"
],
"database_specific": {
"cwe_ids": [
"CWE-476"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2019-03-25T00:29:00Z",
"severity": "MODERATE"
},
"details": "An issue was discovered in Xpdf 4.01.01. There is a NULL pointer dereference in the function Gfx::opSetExtGState in Gfx.cc.",
"id": "GHSA-px6r-pjwr-j383",
"modified": "2022-05-14T01:15:48Z",
"published": "2022-05-14T01:15:48Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2019-10022"
},
{
"type": "WEB",
"url": "https://forum.xpdfreader.com/viewtopic.php?f=3\u0026t=41273"
}
],
"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-PXR2-XWWM-F7F3
Vulnerability from github – Published: 2022-05-13 01:11 – Updated: 2022-05-13 01:11win32k.sys in the kernel-mode drivers in Microsoft Windows XP SP2 and SP3, Windows Server 2003 SP2, Windows Vista SP1 and SP2, Windows Server 2008 Gold, SP2, R2, and R2 SP1, and Windows 7 Gold and SP1 allows local users to gain privileges via a crafted application that triggers a NULL pointer dereference, a different vulnerability than other "Vulnerability Type 2" CVEs listed in MS11-034, aka "Win32k Null Pointer De-reference Vulnerability."
{
"affected": [],
"aliases": [
"CVE-2011-1229"
],
"database_specific": {
"cwe_ids": [
"CWE-476"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2011-04-13T20:26:00Z",
"severity": "HIGH"
},
"details": "win32k.sys in the kernel-mode drivers in Microsoft Windows XP SP2 and SP3, Windows Server 2003 SP2, Windows Vista SP1 and SP2, Windows Server 2008 Gold, SP2, R2, and R2 SP1, and Windows 7 Gold and SP1 allows local users to gain privileges via a crafted application that triggers a NULL pointer dereference, a different vulnerability than other \"Vulnerability Type 2\" CVEs listed in MS11-034, aka \"Win32k Null Pointer De-reference Vulnerability.\"",
"id": "GHSA-pxr2-xwwm-f7f3",
"modified": "2022-05-13T01:11:20Z",
"published": "2022-05-13T01:11:20Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2011-1229"
},
{
"type": "WEB",
"url": "https://docs.microsoft.com/en-us/security-updates/securitybulletins/2011/ms11-034"
},
{
"type": "WEB",
"url": "https://exchange.xforce.ibmcloud.com/vulnerabilities/66411"
},
{
"type": "WEB",
"url": "https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A12503"
},
{
"type": "WEB",
"url": "http://blogs.technet.com/b/srd/archive/2011/04/12/ms11-034-addressing-vulnerabilities-in-the-win32k-subsystem.aspx"
},
{
"type": "WEB",
"url": "http://osvdb.org/71735"
},
{
"type": "WEB",
"url": "http://secunia.com/advisories/44156"
},
{
"type": "WEB",
"url": "http://support.avaya.com/css/P8/documents/100133352"
},
{
"type": "WEB",
"url": "http://www.securityfocus.com/bid/47229"
},
{
"type": "WEB",
"url": "http://www.securitytracker.com/id?1025345"
},
{
"type": "WEB",
"url": "http://www.us-cert.gov/cas/techalerts/TA11-102A.html"
},
{
"type": "WEB",
"url": "http://www.vupen.com/english/advisories/2011/0952"
}
],
"schema_version": "1.4.0",
"severity": []
}
GHSA-PXR7-H23V-3WV6
Vulnerability from github – Published: 2025-04-08 18:34 – Updated: 2025-04-08 18:34After Effects versions 25.1, 24.6.4 and earlier are affected by a NULL Pointer Dereference vulnerability that could result in an application denial-of-service. An attacker could exploit this vulnerability to crash the application, leading to a denial-of-service condition. Exploitation of this issue requires user interaction in that a victim must open a malicious file.
{
"affected": [],
"aliases": [
"CVE-2025-27185"
],
"database_specific": {
"cwe_ids": [
"CWE-476"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2025-04-08T18:15:54Z",
"severity": "MODERATE"
},
"details": "After Effects versions 25.1, 24.6.4 and earlier are affected by a NULL Pointer Dereference vulnerability that could result in an application denial-of-service. An attacker could exploit this vulnerability to crash the application, leading to a denial-of-service condition. Exploitation of this issue requires user interaction in that a victim must open a malicious file.",
"id": "GHSA-pxr7-h23v-3wv6",
"modified": "2025-04-08T18:34:49Z",
"published": "2025-04-08T18:34:49Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2025-27185"
},
{
"type": "WEB",
"url": "https://helpx.adobe.com/security/products/after_effects/apsb25-23.html"
}
],
"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-PXRJ-JCHH-722X
Vulnerability from github – Published: 2025-06-18 12:30 – Updated: 2025-11-13 18:31In the Linux kernel, the following vulnerability has been resolved:
fs/ntfs3: Fix missing i_op in ntfs_read_mft
There is null pointer dereference because i_op == NULL. The bug happens because we don't initialize i_op for records in $Extend.
{
"affected": [],
"aliases": [
"CVE-2022-50056"
],
"database_specific": {
"cwe_ids": [
"CWE-476"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2025-06-18T11:15:34Z",
"severity": "MODERATE"
},
"details": "In the Linux kernel, the following vulnerability has been resolved:\n\nfs/ntfs3: Fix missing i_op in ntfs_read_mft\n\nThere is null pointer dereference because i_op == NULL.\nThe bug happens because we don\u0027t initialize i_op for records in $Extend.",
"id": "GHSA-pxrj-jchh-722x",
"modified": "2025-11-13T18:31:00Z",
"published": "2025-06-18T12:30:45Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2022-50056"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/37a530bfe56ca9a0d3129598803f2794c7428aae"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/8089a1bc27b41e6800590a92d17c119e9aa8ff53"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/c293e8abc09e6e1faa50d967bd8862b1cbd575e5"
}
],
"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-PXWF-H36W-WCXX
Vulnerability from github – Published: 2025-03-11 18:32 – Updated: 2025-03-11 18:32Illustrator versions 29.2.1, 28.7.4 and earlier are affected by a NULL Pointer Dereference vulnerability that could result in an application denial-of-service. An attacker could exploit this vulnerability to crash the application, leading to a denial of service condition. Exploitation of this issue requires user interaction in that a victim must open a malicious file.
{
"affected": [],
"aliases": [
"CVE-2025-27170"
],
"database_specific": {
"cwe_ids": [
"CWE-476"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2025-03-11T18:15:35Z",
"severity": "MODERATE"
},
"details": "Illustrator versions 29.2.1, 28.7.4 and earlier are affected by a NULL Pointer Dereference vulnerability that could result in an application denial-of-service. An attacker could exploit this vulnerability to crash the application, leading to a denial of service condition. Exploitation of this issue requires user interaction in that a victim must open a malicious file.",
"id": "GHSA-pxwf-h36w-wcxx",
"modified": "2025-03-11T18:32:21Z",
"published": "2025-03-11T18:32:21Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2025-27170"
},
{
"type": "WEB",
"url": "https://helpx.adobe.com/security/products/illustrator/apsb25-17.html"
}
],
"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"
}
]
}
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.