Common Weakness Enumeration

CWE-476

Allowed

NULL Pointer Dereference

Abstraction: Base · Status: Stable

API response cwe.mitre.org

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

1661 vulnerabilities reference this CWE, most recent first.

CVE-2026-120955 (GCVE-0-2026-120955)

Vulnerability from cvelistv5 – Published: 2026-11-03 18:42 – Updated: 2026-11-03 20:00
VLAI
Title
MongoDB C Driver Modern GridFS mongoc_gridfs_bucket_download_to_stream() Aborts Application on Malformed GridFS Metadata
Summary
The GridFS file download API in the MongoDB C Driver does not check the result of an internal operation under certain error conditions during file retrieval. This can cause the process to terminate when stream operations continue. A user who can influence file download parameters can trigger this condition, which may result in service unavailability for applications using the affected API.
Severity
8.7 (High)
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
7.5 (High)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
SSVC
Exploitation: none Automatable: yes Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-11-03 20:00 UTC
CWE
  • CWE-476 - NULL Pointer Dereference
Assigner
mongodb CNA
References
Impacted products
Vendor Product Version
MongoDB C Driver Affected: 1.25.0 , ≤ 1.30.14 (semver)
Affected: 2.0.0 , ≤ 2.5.7 (semver)
Create a notification for this product.
Show details on NVD website
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CVE-2026-120758 (GCVE-0-2026-120758)

Vulnerability from cvelistv5 – Published: 2026-11-03 15:38 – Updated: 2026-11-03 17:52
VLAI
Title
NULL Pointer Dereference in H5HL_unprotect via Corrupted File
Summary
HDF5 through 2.2.0 contains a NULL pointer dereference vulnerability in H5HL_unprotect() in src/H5HL.c. H5HL_protect() pins a single metadata cache entry for a local heap, either the heap prefix or the separate data block, and H5HL_unprotect() unpins it on the final unprotect. When the metadata cache destroys a corrupted local heap entry, H5HL__prfx_dest() unlinks it from the heap by setting heap->prfx or heap->dblk to NULL. A crafted HDF5 file can therefore reach H5HL_unprotect() with no cached object to unpin, and the function passes the NULL pointer to H5AC_unpin_entry(). This causes an assertion failure in debug builds and a NULL pointer dereference and crash in release builds. An attacker who can get a user or application to open and traverse a malicious file can cause a denial of service.
Severity
5.4 (Medium)
CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:P
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-11-03 17:51 UTC
CWE
  • CWE-476 - NULL pointer dereference
Assigner
HDFG CNA
References
Impacted products
Vendor Product Version
The HDF Group HDF5 Affected: < 2.3.0
Create a notification for this product.
Show details on NVD website
To clipboard 

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CVE-2026-120454 (GCVE-0-2026-120454)

Vulnerability from cvelistv5 – Published: 2026-11-02 14:29 – Updated: 2026-11-05 21:44
VLAI
Title
The Sleuth Kit through 4.15.0 NULL Pointer Dereference via decmpfs LZVN Decompression
Summary
The Sleuth Kit through 4.15.0 contains a NULL pointer dereference vulnerability in decmpfs_decompress_lzvn_attr() that allows attackers to crash the tool by supplying a crafted HFS+ image. Attackers can set a huge uncompressed_size in an LZVN inline com.apple.decmpfs attribute so allocation fails and the decoder writes through NULL, causing denial of service.
Severity
6.8 (Medium)
CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
5.5 (Medium)
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
SSVC
Exploitation: poc Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-11-05 21:44 UTC
CWE
  • CWE-476 - NULL Pointer Dereference
Assigner
VulnCheck CNA
References
Impacted products
Vendor Product Version
The Sleuth Kit The Sleuth Kit Affected: 0 , ≤ 4.15.0 (semver)
    cpe:2.3:a:sleuthkit:the_sleuth_kit:*:*:*:*:*:*:*:*
Create a notification for this product.
Date Public
2026-10-21 00:00
Credits
HaiND from the Post and Telecommunication Institute of Technology
Show details on NVD website
To clipboard 

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CVE-2026-120046 (GCVE-0-2026-120046)

Vulnerability from cvelistv5 – Published: 2026-10-30 18:52 – Updated: 2026-11-05 02:29
VLAI
Title
Nezha 2.0.0 before 2.4.0 Startup NULL Pointer Dereference via Orphaned Service History
Summary
Nezha 2.0.0 before 2.4.0 contains a NULL pointer dereference vulnerability in ServiceSentinel.loadTodayStats that allows authenticated users to crash the dashboard by deleting a service. Attackers can delete their own service via POST /api/v1/batch-delete/service, leaving orphaned service_histories rows that crash the non-TSDB dashboard on its next startup until removed manually.
Severity
6 (Medium)
CVSS:4.0/AV:N/AC:H/AT:P/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
5.3 (Medium)
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-11-05 02:29 UTC
CWE
  • CWE-476 - NULL Pointer Dereference
Assigner
VulnCheck CNA
References
Impacted products
Vendor Product Version
nezhahq nezha Affected: 2.0.0 , < 2.4.0 (semver)
Create a notification for this product.
Date Public
2026-10-21 00:00
Credits
Zachariah Mithani (AploSec) naiba
Show details on NVD website
To clipboard 

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CVE-2026-119842 (GCVE-0-2026-119842)

Vulnerability from cvelistv5 – Published: 2026-10-30 18:51 – Updated: 2026-11-05 17:05
VLAI
Title
Gst-plugins-base: gst-plugins-base: null-pointer dereference in mdvdsub subtitle parser via missing closing-brace check
Summary
A flaw was found in GStreamer's gst-plugins-base MicroDVD subtitle parser. When processing a specially crafted subtitle file, the parser may dereference a NULL pointer, causing the application to crash when a user opens or plays media with a malformed MicroDVD (.sub) subtitle file.
Severity
6.5 (Medium)
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-10-30 21:18 UTC
CWE
  • CWE-476 - NULL Pointer Dereference
Assigner
redhat CNA
References
Impacted products
Date Public
2026-04-07 00:00
Show details on NVD website
To clipboard 

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CVE-2026-119760 (GCVE-0-2026-119760)

Vulnerability from cvelistv5 – Published: 2026-10-30 17:19 – Updated: 2026-11-05 02:25
VLAI
Title
sniproxy through 0.7.0 NULL Pointer Dereference via resolv_cancel()
Summary
sniproxy through 0.7.0 contains a NULL pointer dereference vulnerability in resolv_cancel() that allows remote unauthenticated attackers to crash the daemon by sending overlong hostnames. Attackers can send a 254 or 255 character TLS SNI name or HTTP Host header matching a wildcard backend, then close the connection to terminate the proxy.
Severity
8.7 (High)
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
7.5 (High)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
SSVC
Exploitation: none Automatable: yes Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-11-05 02:25 UTC
CWE
  • CWE-476 - NULL Pointer Dereference
Assigner
VulnCheck CNA
References
Impacted products
Vendor Product Version
dlundquist sniproxy Affected: 0 , ≤ 0.7.0 (semver)
    cpe:2.3:a:sniproxy_project:sniproxy:*:*:*:*:*:*:*:*
Create a notification for this product.
Date Public
2026-10-23 00:00
Credits
Renaud Allard
Show details on NVD website
To clipboard 

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CVE-2026-119728 (GCVE-0-2026-119728)

Vulnerability from cvelistv5 – Published: 2026-10-30 18:34 – Updated: 2026-11-05 17:05
VLAI
Title
Gst-plugins-bad: gst-plugins-bad: null pointer dereference in h.264 mvc sps cleanup during parse failure
Summary
A flaw was found in the H.264 video parser in gst-plugins-bad. When processing a specially crafted H.264 video file or network stream with malformed Multiview (MVC) Sequence Parameter Set data, the parser can dereference a NULL pointer during the cleanup of partially allocated internal structures after a parse failure. This can cause the application using GStreamer to crash, resulting in a denial of service.
Severity
6.5 (Medium)
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-10-30 18:55 UTC
CWE
  • CWE-476 - NULL Pointer Dereference
Assigner
redhat CNA
References
Impacted products
Date Public
2026-04-07 00:00
Show details on NVD website
To clipboard 

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CVE-2026-119188 (GCVE-0-2026-119188)

Vulnerability from cvelistv5 – Published: 2026-10-29 19:21 – Updated: 2026-10-30 16:09
VLAI
Title
Forge: Denial of service in TLS record processing via a record interleaved with a fragmented handshake message
Summary
Forge (also called node-forge) is a native implementation of Transport Layer Security in JavaScript. Prior to 1.4.1, the affected implementation used forge.tls.createConnection(), fragmented handshake message, interleaved record to process the relevant input or security decision. node-forge continued processing after a TLS record of another content type interrupted a fragmented handshake message. A remote peer could trigger an uncaught TypeError in process(), causing the connection or hosting process to fail. This issue is fixed in version 1.4.1.
Severity
7.5 (High)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
SSVC
Exploitation: none Automatable: yes Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-10-30 15:47 UTC
CWE
Assigner
GitHub_M CNA
References
Impacted products
Vendor Product Version
digitalbazaar forge Affected: < 1.4.1
Create a notification for this product.
Show details on NVD website
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CVE-2026-118778 (GCVE-0-2026-118778)

Vulnerability from cvelistv5 – Published: 2026-10-29 18:44 – Updated: 2026-11-03 16:20
VLAI
Title
Forge: TLS client crash when the server sends no certificate
Summary
Forge (also called node-forge) is a native implementation of Transport Layer Security in JavaScript. Prior to 1.4.1, the affected implementation used forge.tls.createConnection(), c.session.serverCertificate, RSA key exchange to process the relevant input or security decision. node-forge's TLS client checked the wrong property when deciding whether a server certificate was missing. A malicious TLS server or on-path peer could omit the Certificate message and reach code that dereferenced the absent certificate, causing an uncaught exception and terminating the connection or process. This issue is fixed in version 1.4.1.
Severity
5.9 (Medium)
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
SSVC
Exploitation: poc Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-11-03 16:18 UTC
CWE
  • CWE-476 - NULL Pointer Dereference
Assigner
GitHub_M CNA
References
Impacted products
Vendor Product Version
digitalbazaar forge Affected: < 1.4.1
Create a notification for this product.
Show details on NVD website
To clipboard 

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CVE-2026-117610 (GCVE-0-2026-117610)

Vulnerability from cvelistv5 – Published: 2026-10-28 02:03 – Updated: 2026-11-05 15:47
VLAI
Title
libexpat through 2.9.0 NULL Pointer Dereference via External Entity Subparser
Summary
libexpat through 2.9.0 contains a NULL pointer dereference vulnerability in externalEntityInitProcessor2() in lib/xmlparse.c that mishandles the XML_TOK_NONE token from empty input. Attackers who control stream chunking can force an empty non-final first parse on an external entity subparser, causing a later parse to crash the application.
Severity
8.2 (High)
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
5.9 (Medium)
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-11-05 15:47 UTC
CWE
  • CWE-476 - NULL Pointer Dereference
Assigner
VulnCheck CNA
References
Impacted products
Vendor Product Version
libexpat libexpat Affected: 0 , ≤ 2.9.0 (semver)
    cpe:2.3:a:libexpat_project:libexpat:*:*:*:*:*:*:*:*
Create a notification for this product.
Date Public
2026-10-26 00:00
Credits
Minkyung Park Sebastian Pipping
Show details on NVD website
To clipboard 

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              "cweId": "CWE-476",
              "description": "NULL Pointer Dereference",
              "lang": "en",
              "type": "CWE"
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          ]
        }
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      "providerMetadata": {
        "dateUpdated": "2026-10-28T02:03:18.766Z",
        "orgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10",
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          "url": "https://github.com/libexpat/libexpat/pull/1444"
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          "url": "https://github.com/libexpat/libexpat/commit/7b0d50e4b1d16fafd55876260701e04279a7489d"
        },
        {
          "tags": [
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          "url": "https://github.com/libexpat/libexpat/blob/a76b1174c1ea52abb639a4c69d52b630a8a106a2/expat/lib/xmlparse.c#L3468-L3510"
        },
        {
          "tags": [
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          "url": "https://github.com/libexpat/libexpat"
        },
        {
          "name": "VulnCheck Advisory: libexpat through 2.9.0 NULL Pointer Dereference via External Entity Subparser",
          "tags": [
            "third-party-advisory"
          ],
          "url": "https://www.vulncheck.com/advisories/libexpat-through-2.9.0-null-pointer-dereference-via-external-entity-subparser"
        }
      ],
      "title": "libexpat through 2.9.0 NULL Pointer Dereference via External Entity Subparser",
      "x_generator": {
        "engine": "vulncheck-endgame"
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    }
  },
  "cveMetadata": {
    "assignerOrgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10",
    "assignerShortName": "VulnCheck",
    "cveId": "CVE-2026-117610",
    "datePublished": "2026-10-28T02:03:18.766Z",
    "dateReserved": "2026-10-27T13:04:09.906Z",
    "dateUpdated": "2026-11-05T15:47:54.654Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}
Mitigation MIT-56
Implementation

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
Requirements

Select a programming language that is not susceptible to these issues.

Mitigation
Implementation

Check the results of all functions that return a value and verify that the value is non-null before acting upon it.

Mitigation
Architecture and Design

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
Implementation

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.

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