Common Weakness Enumeration
CWE-476
AllowedNULL Pointer Dereference
Abstraction: Base · Status: Stable
The product dereferences a pointer that it expects to be valid but is NULL.
6458 vulnerabilities reference this CWE, most recent first.
CVE-2026-72582 (GCVE-0-2026-72582)
Vulnerability from cvelistv5 – Published: 2026-08-10 10:41 – Updated: 2026-08-10 13:17
VLAI
EPSS
VEX
Title
fastschema - Unauthenticated NULL Pointer Dereference DoS in Account Recovery Endpoint
Summary
A NULL pointer dereference vulnerability in fastschema through v0.15.1 allows an unauthenticated remote attacker to crash the server process with a single HTTP request. The sendOTPEmail function in pkg/auth/local.go dereferences a pointer obtained from an unchecked error path without validating it is non-nil, causing a fatal panic that terminates the entire server when a recovery request is sent to the /api/auth/local/recover endpoint.
Severity
7.5 (High)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-10 13:17 UTC
CWE
- CWE-476 - NULL Pointer Dereference
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://github.com/fastschema/fastschema | third-party-advisory |
| https://github.com/fastschema/fastschema/blob/mai… | technical-description |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| fastschema | fastschema |
Affected:
0 , ≤ 0.15.1
(semver)
|
Date Public
2026-08-10 10:32
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CVE-2026-71967 (GCVE-0-2026-71967)
Vulnerability from cvelistv5 – Published: 2026-08-10 18:11 – Updated: 2026-08-10 21:10 X_Open Source
VLAI
EPSS
VEX
Title
OP-TEE OS 4.10.0 NULL Pointer Dereference DoS via Widevine PTA open_session
Summary
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Severity
5.5 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-10 18:58 UTC
CWE
- CWE-476 - NULL Pointer Dereference
Assigner
References
3 references
| URL | Tags |
|---|---|
| https://github.com/OP-TEE/optee_os/pull/7899 | issue-tracking |
| https://github.com/OP-TEE/optee_os/commit/0aadfc2… | patch |
| https://www.vulncheck.com/advisories/op-tee-os-nu… | third-party-advisory |
Impacted products
Date Public
2026-07-30 00:00
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CVE-2026-70640 (GCVE-0-2026-70640)
Vulnerability from cvelistv5 – Published: 2026-08-06 15:38 – Updated: 2026-08-07 19:03 X_Open Source
VLAI
EPSS
VEX
Title
llama.cpp b1886–b7445 Race Condition Use-After-Free via llama-android.cpp
Summary
llama.cpp builds b1886 through b7445 contain a race condition use-after-free vulnerability in the LLaMA-Android JNI wrapper where bench_1model() and free_1context() lack synchronization, allowing Thread A to operate on freed memory while Thread B concurrently frees the llama_context. Attackers can exploit this by performing heap spray with attacker-controlled data containing a fake vtable to hijack the vtable pointer at offset +0x30, causing llama_batch_allocr::clear() to dereference arbitrary memory and achieve remote code execution.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-07 16:18 UTC
CWE
Assigner
References
4 references
| URL | Tags |
|---|---|
| https://github.com/ggml-org/llama.cpp/releases/ta… | release-notes |
| https://github.com/ggml-org/llama.cpp/commit/5c0d… | patch |
| https://github.com/Vladimir-tokarev-cyera/llama-c… | related |
| https://www.vulncheck.com/advisories/llama-cpp-b1… | third-party-advisory |
Impacted products
Date Public
2026-05-06 00:00
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CVE-2026-70639 (GCVE-0-2026-70639)
Vulnerability from cvelistv5 – Published: 2026-08-06 15:37 – Updated: 2026-08-07 19:03 X_Open Source
VLAI
EPSS
VEX
Title
llama.cpp b1886–b7445 Null Pointer Dereference DoS via llama-android.cpp
Summary
llama.cpp builds b1886 through b7445 contain a null pointer dereference vulnerability in the LLaMA-Android JNI wrapper where the bench_1model() function fails to validate the model context pointer before dereferencing it. Attackers can supply a malicious, corrupt, or truncated model file to trigger a null context condition, causing a SIGSEGV crash that terminates the Android application process and results in denial of service.
Severity
5.5 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-07 15:54 UTC
CWE
- CWE-476 - NULL Pointer Dereference
Assigner
References
4 references
| URL | Tags |
|---|---|
| https://github.com/ggml-org/llama.cpp/releases/ta… | release-notes |
| https://github.com/ggml-org/llama.cpp/commit/5c0d… | patch |
| https://github.com/Vladimir-tokarev-cyera/llama-c… | related |
| https://www.vulncheck.com/advisories/llama-cpp-b1… | third-party-advisory |
Impacted products
Date Public
2026-05-06 00:00
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CVE-2026-67304 (GCVE-0-2026-67304)
Vulnerability from cvelistv5 – Published: 2026-08-01 12:22 – Updated: 2026-08-03 18:11
VLAI
EPSS
VEX
Title
FreeRDP before 3.29.0 NULL Dereference via smartcard cleanup
Summary
FreeRDP before 3.29.0 contains a null pointer dereference vulnerability in smartcard device control request cleanup when reader-state decoding fails. Attackers can send malformed smartcard IRP requests with non-zero cReaders and truncated reader-state data to crash the process via null pointer access in free_reader_states functions.
Severity
SSVC
Exploitation: poc
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-03 18:10 UTC
CWE
- CWE-476 - NULL Pointer Dereference
Assigner
References
3 references
| URL | Tags |
|---|---|
| https://github.com/FreeRDP/FreeRDP/security/advis… | vendor-advisory |
| https://github.com/FreeRDP/FreeRDP/commit/1cc783d… | patch |
| https://www.vulncheck.com/advisories/freerdp-befo… | third-party-advisory |
Impacted products
Date Public
2026-07-15 00:00
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CVE-2026-67288 (GCVE-0-2026-67288)
Vulnerability from cvelistv5 – Published: 2026-08-01 12:22 – Updated: 2026-08-03 19:49
VLAI
EPSS
VEX
Title
FreeRDP before 3.29.0 Denial of Service via smartcard cache
Summary
FreeRDP before 3.29.0 contains a null pointer dereference vulnerability in smartcard cache request decoders that accept NULL NDR pointers for LookupName in SCARD_IOCTL_READCACHEA and SCARD_IOCTL_WRITECACHEA operations. When smartcard emulation is enabled, attackers can send crafted smartcard cache requests with NULL lookup-name pointers to trigger strlen() on a null pointer, causing client process termination.
Severity
SSVC
Exploitation: poc
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-03 19:47 UTC
CWE
- CWE-476 - NULL Pointer Dereference
Assigner
References
5 references
| URL | Tags |
|---|---|
| https://github.com/FreeRDP/FreeRDP/security/advis… | vendor-advisory |
| https://github.com/FreeRDP/FreeRDP/commit/f3b4347… | patch |
| https://github.com/FreeRDP/FreeRDP/commit/5370fb2… | patch |
| https://www.vulncheck.com/advisories/freerdp-befo… | third-party-advisory |
| https://github.com/FreeRDP/FreeRDP/security/advis… | exploit |
Impacted products
Date Public
2026-07-15 00:00
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CVE-2026-67184 (GCVE-0-2026-67184)
Vulnerability from cvelistv5 – Published: 2026-07-28 16:28 – Updated: 2026-07-28 17:38 X_Open Source
VLAI
EPSS
VEX
Title
TinyWeb 0.0.8 Null Pointer Dereference DoS via Malformed HTTP Request
Summary
TinyWeb through 0.0.8 contains a null pointer dereference vulnerability that allows unauthenticated remote attackers to crash worker processes by sending a malformed HTTP request line with an invalid version string. The HttpParser::execute() function fails to allocate the Url object when version parsing fails, leaving the url pointer NULL, and buildResponse() subsequently dereferences this NULL pointer without checking the valid_requ flag, producing a SIGSEGV that terminates the worker process and, when repeated across all workers, takes the server permanently offline until manually restarted.
Severity
SSVC
Exploitation: poc
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-07-28 17:38 UTC
CWE
- CWE-476 - NULL Pointer Dereference
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://github.com/theopaid/Unauthenticated-NULL-… | technical-descriptionexploit |
| https://www.vulncheck.com/advisories/tinyweb-null… | third-party-advisory |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| GeneralSandman | TinyWeb |
Affected:
e48f15d38d2bebeec9cabcfdde81931b10a1963b , ≤ a381da252fe8e873c8aff22703040426cc9b2ae0
(git)
Affected: 0.0.8 (semver) |
Date Public
2026-07-26 00:00
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CVE-2026-66749 (GCVE-0-2026-66749)
Vulnerability from cvelistv5 – Published: 2026-07-28 15:30 – Updated: 2026-07-28 16:43 X_Open Source Unsupported When Assigned
VLAI
EPSS
VEX
Title
Let's Chat 0.4.0 - 0.4.8 Denial of Service via Null Dereference in Room Lookup
Summary
Let's Chat 0.4.0 through 0.4.8 contains a null dereference vulnerability that allows authenticated attackers to crash the server by supplying a valid 24-character hex string room parameter that matches no document in the database. Attackers can send a crafted GET /messages request causing an uncaught TypeError in an asynchronous Mongoose callback that terminates the Node.js server process, with the same defect reachable through multiple code paths including the socket.io interface.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-07-28 16:41 UTC
CWE
- CWE-476 - NULL Pointer Dereference
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://github.com/theopaid/Unchecked-Room-Lookup… | technical-descriptionexploit |
| https://www.vulncheck.com/advisories/let-s-chat-d… | third-party-advisory |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| sdelements | lets-chat |
Affected:
0.4.0 , ≤ 0.4.8
(semver)
Affected: 84981a6d2534445c00ea4e095c934e46943c0b1d , ≤ 617207ff3c0c0bf8e3c7a915bd9ec03f1dd8390c (git) |
Date Public
2026-07-26 00:00
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CVE-2026-65681 (GCVE-0-2026-65681)
Vulnerability from cvelistv5 – Published: 2026-08-11 17:06 – Updated: 2026-08-13 17:37
VLAI
EPSS
VEX
Title
Windows iSCSI Target Service Denial of Service Vulnerability
Summary
Null pointer dereference in Windows iSCSI Target Service allows an unauthorized attacker to deny service over a network.
Severity
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-11 18:05 UTC
CWE
- CWE-476 - NULL Pointer Dereference
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://msrc.microsoft.com/update-guide/vulnerabi… | vendor-advisorypatch |
Impacted products
9 products
| Vendor | Product | Version | |
|---|---|---|---|
| Microsoft | Windows 10 Version 1607 |
Affected:
10.0.14393.0 , < 10.0.14393.9418
(custom)
|
|
| Microsoft | Windows 10 Version 1809 |
Affected:
10.0.17763.0 , < 10.0.17763.9115
(custom)
|
|
| Microsoft | Windows Server 2016 |
Affected:
10.0.14393.0 , < 10.0.14393.9418
(custom)
|
|
| Microsoft | Windows Server 2016 (Server Core installation) |
Affected:
10.0.14393.0 , < 10.0.14393.9418
(custom)
|
|
| Microsoft | Windows Server 2019 |
Affected:
10.0.17763.0 , < 10.0.17763.9115
(custom)
|
|
| Microsoft | Windows Server 2019 (Server Core installation) |
Affected:
10.0.17763.0 , < 10.0.17763.9115
(custom)
|
|
| Microsoft | Windows Server 2022 |
Affected:
10.0.20348.0 , < 10.0.20348.5499
(custom)
|
|
| Microsoft | Windows Server 2025 |
Affected:
10.0.26100.0 , < 10.0.26100.33296
(custom)
|
|
| Microsoft | Windows Server 2025 (Server Core installation) |
Affected:
10.0.26100.0 , < 10.0.26100.33296
(custom)
|
Date Public
2026-08-11 14:00
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CVE-2026-63762 (GCVE-0-2026-63762)
Vulnerability from cvelistv5 – Published: 2026-07-20 12:04 – Updated: 2026-07-28 01:05
VLAI
EPSS
VEX
Title
SurrealDB before v2.6.1 Denial of Service via scripting
Summary
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Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-07-21 15:10 UTC
CWE
- CWE-476 - NULL Pointer Dereference
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://github.com/surrealdb/surrealdb/security/a… | vendor-advisory |
| https://www.vulncheck.com/advisories/surrealdb-be… | third-party-advisory |
Impacted products
Date Public
2026-02-12 00:00
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"userInteraction": "NONE",
"vectorString": "CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N",
"version": "4.0",
"vulnAvailabilityImpact": "HIGH",
"vulnConfidentialityImpact": "NONE",
"vulnIntegrityImpact": "NONE"
},
"format": "CVSS"
}
],
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-476",
"description": "NULL Pointer Dereference",
"lang": "en",
"type": "CWE"
}
]
}
],
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"dateUpdated": "2026-07-28T01:05:52.215Z",
"orgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10",
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"references": [
{
"name": "GitHub Security Advisory (GHSA-xx7m-69ff-9crp)",
"tags": [
"vendor-advisory"
],
"url": "https://github.com/surrealdb/surrealdb/security/advisories/GHSA-xx7m-69ff-9crp"
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{
"name": "VulnCheck Advisory: SurrealDB before v2.6.1 Denial of Service via scripting",
"tags": [
"third-party-advisory"
],
"url": "https://www.vulncheck.com/advisories/surrealdb-before-denial-of-service-via-scripting"
}
],
"title": "SurrealDB before v2.6.1 Denial of Service via scripting",
"x_generator": {
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}
},
"cveMetadata": {
"assignerOrgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10",
"assignerShortName": "VulnCheck",
"cveId": "CVE-2026-63762",
"datePublished": "2026-07-20T12:04:51.673Z",
"dateReserved": "2026-07-18T12:34:08.780Z",
"dateUpdated": "2026-07-28T01:05:52.215Z",
"state": "PUBLISHED"
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"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.