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-HMR2-524C-VV28
Vulnerability from github – Published: 2026-01-19 06:30 – Updated: 2026-03-04 15:30HarfBuzz::Shaper versions before 0.032 for Perl contains a bundled library with a null pointer dereference vulnerability.
Versions before 0.032 contain HarfBuzz 8.4.0 or earlier bundled as hb_src.tar.gz in the source tarball, which is affected by CVE-2026-22693.
{
"affected": [],
"aliases": [
"CVE-2026-0943"
],
"database_specific": {
"cwe_ids": [
"CWE-476"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2026-01-19T04:15:58Z",
"severity": "HIGH"
},
"details": "HarfBuzz::Shaper versions before 0.032 for Perl contains a bundled library with a null pointer dereference vulnerability.\u00a0\n\nVersions before 0.032 contain HarfBuzz 8.4.0 or earlier bundled as hb_src.tar.gz in the source tarball, which is affected by CVE-2026-22693.",
"id": "GHSA-hmr2-524c-vv28",
"modified": "2026-03-04T15:30:32Z",
"published": "2026-01-19T06:30:27Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-0943"
},
{
"type": "WEB",
"url": "https://bugzilla.redhat.com/show_bug.cgi?id=2429296"
},
{
"type": "WEB",
"url": "https://metacpan.org/release/JV/HarfBuzz-Shaper-0.032/changes"
},
{
"type": "WEB",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-22693"
}
],
"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-HMWX-8XFX-MG6M
Vulnerability from github – Published: 2022-05-24 19:18 – Updated: 2025-08-15 21:31In the CODESYS V2 web server prior to V1.1.9.22 crafted web server requests may cause a Null pointer dereference in the CODESYS web server and may result in a denial-of-service condition.
{
"affected": [],
"aliases": [
"CVE-2021-34586"
],
"database_specific": {
"cwe_ids": [
"CWE-476"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2021-10-26T10:15:00Z",
"severity": "HIGH"
},
"details": "In the CODESYS V2 web server prior to V1.1.9.22 crafted web server requests may cause a Null pointer dereference in the CODESYS web server and may result in a denial-of-service condition.",
"id": "GHSA-hmwx-8xfx-mg6m",
"modified": "2025-08-15T21:31:14Z",
"published": "2022-05-24T19:18:51Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2021-34586"
},
{
"type": "WEB",
"url": "https://customers.codesys.com/index.php?eID=dumpFile\u0026t=f\u0026f=16876\u0026token=a3f1d937f95e7034879f4f2ea8e5a99b168256a7\u0026download="
},
{
"type": "WEB",
"url": "https://www.tenable.com/security/research/tra-2021-47"
}
],
"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-HP25-PG36-QR59
Vulnerability from github – Published: 2022-05-17 02:47 – Updated: 2022-05-17 02:47libyara/lexer.l in YARA 3.5.0 allows remote attackers to cause a denial of service (NULL pointer dereference and application crash) via a crafted rule that is mishandled in the yy_get_next_buffer function.
{
"affected": [],
"aliases": [
"CVE-2016-10210"
],
"database_specific": {
"cwe_ids": [
"CWE-476"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2017-04-03T05:59:00Z",
"severity": "HIGH"
},
"details": "libyara/lexer.l in YARA 3.5.0 allows remote attackers to cause a denial of service (NULL pointer dereference and application crash) via a crafted rule that is mishandled in the yy_get_next_buffer function.",
"id": "GHSA-hp25-pg36-qr59",
"modified": "2022-05-17T02:47:20Z",
"published": "2022-05-17T02:47:20Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2016-10210"
},
{
"type": "WEB",
"url": "https://github.com/VirusTotal/yara/issues/576"
},
{
"type": "WEB",
"url": "https://github.com/VirusTotal/yara/commit/3119b232c9c453c98d8fa8b6ae4e37ba18117cd4"
},
{
"type": "WEB",
"url": "http://www.securityfocus.com/bid/98077"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
"type": "CVSS_V3"
}
]
}
GHSA-HP2J-Q576-5VVW
Vulnerability from github – Published: 2024-07-30 09:31 – Updated: 2025-09-25 21:30In the Linux kernel, the following vulnerability has been resolved:
s390/dasd: Fix invalid dereferencing of indirect CCW data pointer
Fix invalid dereferencing of indirect CCW data pointer in dasd_eckd_dump_sense() that leads to a kernel panic in error cases.
When using indirect addressing for DASD CCWs (IDAW) the CCW CDA pointer does not contain the data address itself but a pointer to the IDAL. This needs to be translated from physical to virtual as well before using it.
This dereferencing is also used for dasd_page_cache and also fixed although it is very unlikely that this code path ever gets used.
{
"affected": [],
"aliases": [
"CVE-2024-42099"
],
"database_specific": {
"cwe_ids": [
"CWE-476"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2024-07-30T08:15:02Z",
"severity": "MODERATE"
},
"details": "In the Linux kernel, the following vulnerability has been resolved:\n\ns390/dasd: Fix invalid dereferencing of indirect CCW data pointer\n\nFix invalid dereferencing of indirect CCW data pointer in\ndasd_eckd_dump_sense() that leads to a kernel panic in error cases.\n\nWhen using indirect addressing for DASD CCWs (IDAW) the CCW CDA pointer\ndoes not contain the data address itself but a pointer to the IDAL.\nThis needs to be translated from physical to virtual as well before\nusing it.\n\nThis dereferencing is also used for dasd_page_cache and also fixed\nalthough it is very unlikely that this code path ever gets used.",
"id": "GHSA-hp2j-q576-5vvw",
"modified": "2025-09-25T21:30:19Z",
"published": "2024-07-30T09:31:51Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2024-42099"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/b3a58f3b90f564f42a5c35778d8c5107b2c2150b"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/c116475f7d6410b1e6d399207ac75de6cf9c3652"
}
],
"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-HP2V-MMP5-5MCX
Vulnerability from github – Published: 2022-05-17 02:24 – Updated: 2022-05-17 02:24In OpenSSL 1.1.0 before 1.1.0c, applications parsing invalid CMS structures can crash with a NULL pointer dereference. This is caused by a bug in the handling of the ASN.1 CHOICE type in OpenSSL 1.1.0 which can result in a NULL value being passed to the structure callback if an attempt is made to free certain invalid encodings. Only CHOICE structures using a callback which do not handle NULL value are affected.
{
"affected": [],
"aliases": [
"CVE-2016-7053"
],
"database_specific": {
"cwe_ids": [
"CWE-476"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2017-05-04T19:29:00Z",
"severity": "HIGH"
},
"details": "In OpenSSL 1.1.0 before 1.1.0c, applications parsing invalid CMS structures can crash with a NULL pointer dereference. This is caused by a bug in the handling of the ASN.1 CHOICE type in OpenSSL 1.1.0 which can result in a NULL value being passed to the structure callback if an attempt is made to free certain invalid encodings. Only CHOICE structures using a callback which do not handle NULL value are affected.",
"id": "GHSA-hp2v-mmp5-5mcx",
"modified": "2022-05-17T02:24:38Z",
"published": "2022-05-17T02:24:38Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2016-7053"
},
{
"type": "WEB",
"url": "https://h20566.www2.hpe.com/hpsc/doc/public/display?docLocale=en_US\u0026docId=emr_na-hpesbhf03744en_us"
},
{
"type": "WEB",
"url": "https://www.openssl.org/news/secadv/20161110.txt"
},
{
"type": "WEB",
"url": "http://www.securityfocus.com/bid/94244"
},
{
"type": "WEB",
"url": "http://www.securitytracker.com/id/1037261"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
"type": "CVSS_V3"
}
]
}
GHSA-HP2V-W3XQ-4JVV
Vulnerability from github – Published: 2026-02-14 18:30 – Updated: 2026-03-19 18:31In the Linux kernel, the following vulnerability has been resolved:
i2c: imx: preserve error state in block data length handler
When a block read returns an invalid length, zero or >I2C_SMBUS_BLOCK_MAX, the length handler sets the state to IMX_I2C_STATE_FAILED. However, i2c_imx_master_isr() unconditionally overwrites this with IMX_I2C_STATE_READ_CONTINUE, causing an endless read loop that overruns buffers and crashes the system.
Guard the state transition to preserve error states set by the length handler.
{
"affected": [],
"aliases": [
"CVE-2026-23197"
],
"database_specific": {
"cwe_ids": [
"CWE-476"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2026-02-14T17:15:57Z",
"severity": "MODERATE"
},
"details": "In the Linux kernel, the following vulnerability has been resolved:\n\ni2c: imx: preserve error state in block data length handler\n\nWhen a block read returns an invalid length, zero or \u003eI2C_SMBUS_BLOCK_MAX,\nthe length handler sets the state to IMX_I2C_STATE_FAILED. However,\ni2c_imx_master_isr() unconditionally overwrites this with\nIMX_I2C_STATE_READ_CONTINUE, causing an endless read loop that overruns\nbuffers and crashes the system.\n\nGuard the state transition to preserve error states set by the length\nhandler.",
"id": "GHSA-hp2v-w3xq-4jvv",
"modified": "2026-03-19T18:31:14Z",
"published": "2026-02-14T18:30:16Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-23197"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/3f9b508b3eecc00a243edf320bd83834d6a9b482"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/b126097b0327437048bd045a0e4d273dea2910dd"
}
],
"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-HP4V-GPJ6-G9J7
Vulnerability from github – Published: 2022-05-17 02:25 – Updated: 2022-05-17 02:25An issue was discovered in certain Apple products. macOS before 10.12.2 is affected. The issue involves the "CoreCapture" component. It allows local users to cause a denial of service (NULL pointer dereference) via unspecified vectors.
{
"affected": [],
"aliases": [
"CVE-2016-7604"
],
"database_specific": {
"cwe_ids": [
"CWE-476"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2017-02-20T08:59:00Z",
"severity": "MODERATE"
},
"details": "An issue was discovered in certain Apple products. macOS before 10.12.2 is affected. The issue involves the \"CoreCapture\" component. It allows local users to cause a denial of service (NULL pointer dereference) via unspecified vectors.",
"id": "GHSA-hp4v-gpj6-g9j7",
"modified": "2022-05-17T02:25:30Z",
"published": "2022-05-17T02:25:30Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2016-7604"
},
{
"type": "WEB",
"url": "https://support.apple.com/HT207423"
},
{
"type": "WEB",
"url": "http://www.securityfocus.com/bid/94903"
},
{
"type": "WEB",
"url": "http://www.securitytracker.com/id/1037469"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
"type": "CVSS_V3"
}
]
}
GHSA-HP5P-V8V6-Q6H6
Vulnerability from github – Published: 2022-05-17 02:40 – Updated: 2025-04-20 03:38libreswan before 3.18 allows remote attackers to cause a denial of service (NULL pointer dereference and pluto daemon restart).
{
"affected": [],
"aliases": [
"CVE-2016-5391"
],
"database_specific": {
"cwe_ids": [
"CWE-476"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2017-06-13T17:29:00Z",
"severity": "HIGH"
},
"details": "libreswan before 3.18 allows remote attackers to cause a denial of service (NULL pointer dereference and pluto daemon restart).",
"id": "GHSA-hp5p-v8v6-q6h6",
"modified": "2025-04-20T03:38:54Z",
"published": "2022-05-17T02:40:37Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2016-5391"
},
{
"type": "WEB",
"url": "https://bugzilla.redhat.com/show_bug.cgi?id=1356183"
},
{
"type": "WEB",
"url": "https://libreswan.org/security/CVE-2016-5391/CVE-2016-5391.txt"
},
{
"type": "WEB",
"url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/65R6OA5AY7K2UBQUDOLOS5Y3SCULQI6I"
},
{
"type": "WEB",
"url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/UKMS7R4TG6LTAGEBOWVUXF6LAWQXLNXV"
},
{
"type": "WEB",
"url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/65R6OA5AY7K2UBQUDOLOS5Y3SCULQI6I"
},
{
"type": "WEB",
"url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/UKMS7R4TG6LTAGEBOWVUXF6LAWQXLNXV"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
"type": "CVSS_V3"
}
]
}
GHSA-HP5R-FRGX-32V8
Vulnerability from github – Published: 2025-03-27 15:31 – Updated: 2026-06-26 00:31A flaw was found in gnuplot. The plot3d_points() function may lead to a segmentation fault and cause a system crash.
{
"affected": [],
"aliases": [
"CVE-2025-31176"
],
"database_specific": {
"cwe_ids": [
"CWE-476"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2025-03-27T15:16:03Z",
"severity": "MODERATE"
},
"details": "A flaw was found in gnuplot. The plot3d_points() function may lead to a segmentation fault and cause a system crash.",
"id": "GHSA-hp5r-frgx-32v8",
"modified": "2026-06-26T00:31:58Z",
"published": "2025-03-27T15:31:14Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2025-31176"
},
{
"type": "WEB",
"url": "https://access.redhat.com/security/cve/CVE-2025-31176"
},
{
"type": "WEB",
"url": "https://bugzilla.redhat.com/show_bug.cgi?id=2355343"
},
{
"type": "WEB",
"url": "https://sourceforge.net/p/gnuplot/bugs/2776"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
"type": "CVSS_V3"
}
]
}
GHSA-HP67-RVGQ-RWRP
Vulnerability from github – Published: 2025-03-13 21:31 – Updated: 2025-03-13 21:31In the Linux kernel, the following vulnerability has been resolved:
net: dsa: felix: fix possible NULL pointer dereference
As the possible failure of the allocation, kzalloc() may return NULL pointer. Therefore, it should be better to check the 'sgi' in order to prevent the dereference of NULL pointer.
{
"affected": [],
"aliases": [
"CVE-2022-49141"
],
"database_specific": {
"cwe_ids": [
"CWE-476"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2025-02-26T07:00:51Z",
"severity": "MODERATE"
},
"details": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: dsa: felix: fix possible NULL pointer dereference\n\nAs the possible failure of the allocation, kzalloc() may return NULL\npointer.\nTherefore, it should be better to check the \u0027sgi\u0027 in order to prevent\nthe dereference of NULL pointer.",
"id": "GHSA-hp67-rvgq-rwrp",
"modified": "2025-03-13T21:31:18Z",
"published": "2025-03-13T21:31:18Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2022-49141"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/866b7a278cdb51eb158cd8513bc7438fc857804a"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/b7ff8b5e75d4e91ec8c62d621aac8dfb84c57aa9"
}
],
"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"
}
]
}
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.