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.
1661 vulnerabilities reference this CWE, most recent first.
CVE-2026-44323 (GCVE-0-2026-44323)
Vulnerability from cvelistv5 – Published: 2026-05-27 15:45 – Updated: 2026-06-01 17:08
VLAI
EPSS
VEX
Title
free5GC: UDR nudr-dr DELETE amf-subscriptions panics on missing subsId when UE state exists (nil pointer dereference)
Summary
free5GC is an open-source implementation of the 5G core network. Prior to 4.2.2, free5GC's UDR nudr-dr DELETE /subscription-data/{ueId}/{servingPlmnId}/ee-subscriptions/{subsId}/amf-subscriptions handler contains a nil-pointer dereference reachable from a single authenticated request, after one preparatory authenticated EE-subscription create. The handler checks _, ok = UESubsData.EeSubscriptionCollection[subsId] and sets a 404 problem-details on the miss path, but then continues to UESubsData.EeSubscriptionCollection[subsId].AmfSubscriptionInfos -- dereferencing the same missing entry instead of returning. Gin recovery converts the panic into HTTP 500, but the endpoint remains repeatedly panicable. This vulnerability is fixed in 4.2.2.
Severity
4.3 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-06-01 17:04 UTC
CWE
- CWE-476 - NULL Pointer Dereference
Assigner
GitHub_M
CNA
References
4 references
| URL | Tags |
|---|---|
| https://github.com/free5gc/free5gc/security/advis… | x_refsource_CONFIRM |
| https://github.com/free5gc/free5gc/issues/919 | x_refsource_MISC |
| https://github.com/free5gc/udr/pull/60 | x_refsource_MISC |
| https://github.com/free5gc/udr/commit/8a1d3c63be9… | x_refsource_MISC |
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CVE-2026-44322 (GCVE-0-2026-44322)
Vulnerability from cvelistv5 – Published: 2026-05-27 15:46 – Updated: 2026-05-28 14:42
VLAI
EPSS
VEX
Title
free5GC: NEF 3gpp-pfd-management PATCH applications/{appId} panics on UDR access failure due to nil ProblemDetails dereference
Summary
free5GC is an open-source implementation of the 5G core network. Prior to 4.2.2, free5GC's NEF PATCH /3gpp-pfd-management/v1/{afId}/transactions/{transId}/applications/{appId} handler panics with a nil-pointer dereference when the upstream UDR call fails AND the consumer wrapper returns err != nil together with a nil *ProblemDetails. The handler's errPfdData != nil branch builds its own problemDetailsErr correctly, but immediately after it reads problemDetails.Cause (the OTHER value, which is nil in this branch) and panics. Gin recovery converts the panic into HTTP 500, so a single PATCH against this endpoint returns 500 instead of the intended controlled error response whenever UDR access is failing. This vulnerability is fixed in 4.2.2.
Severity
7.5 (High)
SSVC
Exploitation: poc
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-05-28 14:41 UTC
CWE
Assigner
GitHub_M
CNA
References
4 references
| URL | Tags |
|---|---|
| https://github.com/free5gc/free5gc/security/advis… | x_refsource_CONFIRM |
| https://github.com/free5gc/free5gc/issues/925 | x_refsource_MISC |
| https://github.com/free5gc/nef/pull/22 | x_refsource_MISC |
| https://github.com/free5gc/nef/commit/72a47f3fab4… | x_refsource_MISC |
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CVE-2026-44317 (GCVE-0-2026-44317)
Vulnerability from cvelistv5 – Published: 2026-05-27 15:50 – Updated: 2026-05-28 14:46
VLAI
EPSS
VEX
Title
free5GC: PCF npcf-policyauthorization POST /app-sessions panics on suppFeat=1 with missing AfRoutReq via nil pointer dereference
Summary
free5GC is an open-source implementation of the 5G core network. Prior to 4.2.2, free5GC's PCF POST /npcf-policyauthorization/v1/app-sessions handler panics on a single authenticated request whose ascReqData.suppFeat == "1" (enabling traffic-routing feature negotiation) and whose medComponents entries supply an afAppId but NO AfRoutReq. The create path then calls provisioningOfTrafficRoutingInfo(smPolicy, appID, routeReq, ...) with routeReq == nil and dereferences routeReq.RouteToLocs (and other fields) without a nil check, causing runtime error: invalid memory address or nil pointer dereference. Gin recovery converts the panic into HTTP 500. This vulnerability is fixed in 4.2.2.
Severity
6.5 (Medium)
SSVC
Exploitation: poc
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-05-28 14:45 UTC
CWE
Assigner
GitHub_M
CNA
References
4 references
| URL | Tags |
|---|---|
| https://github.com/free5gc/free5gc/security/advis… | x_refsource_CONFIRM |
| https://github.com/free5gc/free5gc/issues/879 | x_refsource_MISC |
| https://github.com/free5gc/pcf/pull/65 | x_refsource_MISC |
| https://github.com/free5gc/pcf/commit/508d70b8527… | x_refsource_MISC |
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CVE-2026-44316 (GCVE-0-2026-44316)
Vulnerability from cvelistv5 – Published: 2026-05-27 15:52 – Updated: 2026-05-27 17:54
VLAI
EPSS
VEX
Title
free5GC: PCF npcf-smpolicycontrol POST /sm-policies panics on downstream UDR/OpenAPI 404 via nil pointer dereference
Summary
free5GC is an open-source implementation of the 5G core network. Prior to 4.2.2, free5GC's PCF POST /npcf-smpolicycontrol/v1/sm-policies handler (HandleCreateSmPolicyRequest) panics with a nil-pointer dereference when a downstream OpenAPI consumer call (UDR lookup) returns 404 Not Found and the consumer wrapper returns err != nil together with a nil response struct. The handler logs the OpenAPI error and continues executing instead of returning, then dereferences the nil response struct on a subsequent line and panics. Gin recovery converts the panic into HTTP 500, so a single attacker-shaped POST returns 500 instead of a clean 4xx whenever the downstream lookup fails. The PCF process keeps running. The trigger is a single POST containing input that causes the downstream UDR lookup to fail (e.g. an unknown DNN). In 4.2.1 this endpoint is also reachable WITHOUT an Authorization header because the PCF Npcf_SMPolicyControl route group is mounted without inbound auth middleware. This vulnerability is fixed in 4.2.2.
Severity
7.5 (High)
SSVC
Exploitation: poc
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-05-27 17:54 UTC
CWE
Assigner
GitHub_M
CNA
References
4 references
| URL | Tags |
|---|---|
| https://github.com/free5gc/free5gc/security/advis… | x_refsource_CONFIRM |
| https://github.com/free5gc/free5gc/issues/803 | x_refsource_MISC |
| https://github.com/free5gc/pcf/pull/62 | x_refsource_MISC |
| https://github.com/free5gc/pcf/commit/df535f55243… | x_refsource_MISC |
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CVE-2026-43864 (GCVE-0-2026-43864)
Vulnerability from cvelistv5 – Published: 2026-05-04 06:10 – Updated: 2026-05-04 18:26
VLAI
EPSS
VEX
Summary
mutt before 2.3.2 has a show_sig_summary NULL pointer dereference.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-05-04 13:47 UTC
CWE
- CWE-476 - NULL Pointer Dereference
Assigner
mitre
CNA
References
1 reference
Impacted products
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CVE-2026-43603 (GCVE-0-2026-43603)
Vulnerability from cvelistv5 – Published: 2026-11-03 15:06 – Updated: 2026-11-03 15:45
VLAI
EPSS
VEX
Summary
A NULL pointer dereference in the Linux GPU driver could potentially lead to a kernel crash and result in denial of service.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-11-03 15:45 UTC
CWE
- CWE-476 - NULL Pointer Dereference
Assigner
AMD
CNA
References
1 reference
Impacted products
41 products
| Vendor | Product | Version | |
|---|---|---|---|
| AMD | AMD Ryzen™ 4000 Series Mobile Processors with Radeon™ Graphics |
Unaffected:
Radeon Software for Linux 26.13
|
|
| AMD | AMD Ryzen™ 7035 Series Processors with Radeon™ Graphics |
Unaffected:
Radeon Software for Linux 26.13
|
|
| AMD | AMD Athlon™ 3000 Series Mobile Processors with Radeon™ Graphics |
Unaffected:
Radeon Software for Linux 26.13
|
|
| AMD | AMD Ryzen™ 7040 Series Mobile Processors with Radeon™ Graphics |
Unaffected:
Radeon Software for Linux 26.13
|
|
| AMD | AMD Ryzen™ 7020 Series Processors with Radeon™ Graphics |
Unaffected:
Radeon Software for Linux 26.13
|
|
| AMD | AMD Ryzen™ 7045 Series Mobile Processors with Radeon™ Graphics |
Unaffected:
Radeon Software for Linux 26.13
|
|
| AMD | AMD Ryzen™ 7000 Series Desktop Processors |
Unaffected:
Radeon Software for Linux 26.13
|
|
| AMD | AMD Ryzen™ 7030 Series Mobile Processors with Radeon™ Graphics |
Unaffected:
Radeon Software for Linux 26.13
|
|
| AMD | AMD Ryzen™ 9000HX Series Processors |
Unaffected:
Radeon Software for Linux 26.13
|
|
| AMD | AMD Ryzen™ AI 300 Series Processors |
Unaffected:
Radeon Software for Linux 26.13
|
|
| AMD | AMD Ryzen™ 8000 Series Desktop Processors |
Unaffected:
Radeon Software for Linux 26.13
|
|
| AMD | AMD Ryzen™ 9000 Series Desktop Processors |
Unaffected:
Radeon Software for Linux 26.13
|
|
| AMD | AMD Ryzen™ 5000 Series Mobile Processors with Radeon™ Graphics |
Unaffected:
Radeon Software for Linux 26.13
|
|
| AMD | AMD Ryzen™ 4000 Series Desktop Processors |
Unaffected:
Radeon Software for Linux 26.13
|
|
| AMD | AMD Ryzen™ 5000 Series Desktop Processors with Radeon™ Graphics |
Unaffected:
Radeon Software for Linux 26.13
|
|
| AMD | AMD Ryzen™ 8040 Series Mobile Processors with Radeon™ Graphics |
Unaffected:
Radeon Software for Linux 26.13
|
|
| AMD | AMD Ryzen™ 6000 Series Processors with Radeon™ Graphics |
Unaffected:
Radeon Software for Linux 26.13
|
|
| AMD | AMD Ryzen™ AI Max 300 Series Processors |
Unaffected:
Radeon Software for Linux 26.13
|
|
| AMD | AMD Ryzen™ AI Max 400 Series Processors |
Unaffected:
Radeon Software for Linux 26.13
|
|
| AMD | AMD Ryzen™ AI 400 Series Processors |
Unaffected:
Radeon Software for Linux 26.13
|
|
| AMD | AMD Radeon™ RX 9000 Series Graphics Products |
Unaffected:
Radeon Software for Linux 26.13
|
|
| AMD | AMD Radeon™ AI PRO R9000 Series Graphics Products |
Unaffected:
Radeon Software for Linux 26.13
|
|
| AMD | AMD Radeon™ RX 7000 Series Graphics Products |
Unaffected:
Radeon Software for Linux 26.13
|
|
| AMD | AMD Radeon™ PRO W7000 Series Graphics Products |
Unaffected:
Radeon Software for Linux 26.13
|
|
| AMD | AMD Radeon™ PRO W6000 Series Graphics Products |
Unaffected:
Radeon Software for Linux 26.13
|
|
| AMD | AMD Radeon™ RX 6000 Series Graphics Products |
Unaffected:
Radeon Software for Linux 26.13
|
|
| AMD | AMD Radeon™ PRO W5000 Series Graphics Products |
Unaffected:
Radeon Software for Linux 26.13
|
|
| AMD | AMD Radeon™ RX 5000 Series Graphics Products |
Unaffected:
Radeon Software for Linux 26.13
|
|
| AMD | AMD Instinct™ MI210 |
Unaffected:
Linux GPU Driver 31.40
|
|
| AMD | AMD Instinct™ MI250 |
Unaffected:
Linux GPU Driver 31.40
|
|
| AMD | AMD Instinct™ MI300A |
Unaffected:
Linux GPU Driver 31.40
|
|
| AMD | AMD Instinct™ MI300X |
Unaffected:
Linux GPU Driver 31.40
|
|
| AMD | AMD Instinct™ MI325X |
Unaffected:
Linux GPU Driver 31.40
|
|
| AMD | AMD Instinct™ MI350X |
Unaffected:
Linux GPU Driver 31.40
|
|
| AMD | AMD Instinct™ MI355X |
Unaffected:
Linux GPU Driver 31.40
|
|
| AMD | AMD Instinct™ MI308X |
Unaffected:
Linux GPU Driver 31.40
|
|
| AMD | AMD Instinct™ MI250X |
Unaffected:
Linux GPU Driver 31.40
|
|
| AMD | AMD Radeon™ PRO V710 |
Unaffected:
Contact your AMD Customer Engineering representative
|
|
| AMD | AMD Radeon™ PRO V620 |
Unaffected:
Contact your AMD Customer Engineering representative
|
|
| AMD | AMD EPYC™ 4005 Series Processors |
Unaffected:
Radeon Software for Linux 26.13
|
|
| AMD | AMD EPYC™ 4004 Series Processors |
Unaffected:
Radeon Software for Linux 26.13
|
Date Public
2026-11-03 15:06
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CVE-2026-42903 (GCVE-0-2026-42903)
Vulnerability from cvelistv5 – Published: 2026-06-09 17:05 – Updated: 2026-09-24 13:44
VLAI
EPSS
VEX
Title
Windows Kerberos Denial of Service Vulnerability
Summary
Null pointer dereference in Windows Kerberos allows an authorized attacker to deny service over a network.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-06-10 14:14 UTC
CWE
- CWE-476 - NULL Pointer Dereference
Assigner
microsoft
CNA
References
1 reference
| URL | Tags |
|---|---|
| https://msrc.microsoft.com/update-guide/vulnerabi… | vendor-advisorypatch |
Impacted products
20 products
| Vendor | Product | Version | |
|---|---|---|---|
| Microsoft | Windows 10 Version 1607 |
Affected:
10.0.14393.0 , < 10.0.14393.9234
(custom)
|
|
| Microsoft | Windows 10 Version 1809 |
Affected:
10.0.17763.0 , < 10.0.17763.8880
(custom)
|
|
| Microsoft | Windows 10 Version 21H2 |
Affected:
10.0.19044.0 , < 10.0.19044.7417
(custom)
|
|
| Microsoft | Windows 10 Version 22H2 |
Affected:
10.0.19045.0 , < 10.0.19045.7417
(custom)
|
|
| Microsoft | Windows 11 version 23H2 |
Affected:
10.0.22631.0 , < 10.0.22631.7219
(custom)
|
|
| Microsoft | Windows 11 Version 23H2 |
Affected:
10.0.22631.0 , < 10.0.22631.7219
(custom)
|
|
| Microsoft | Windows 11 Version 24H2 |
Affected:
10.0.26100.0 , < 10.0.26100.8655
(custom)
|
|
| Microsoft | Windows 11 Version 25H2 |
Affected:
10.0.26200.0 , < 10.0.26200.8655
(custom)
|
|
| Microsoft | Windows 11 version 26H1 |
Affected:
10.0.28000.0 , < 10.0.28000.2269
(custom)
|
|
| Microsoft | Windows Server 2012 |
Affected:
6.2.9200.0 , < 6.2.9200.26132
(custom)
|
|
| Microsoft | Windows Server 2012 (Server Core installation) |
Affected:
6.2.9200.0 , < 6.2.9200.26132
(custom)
|
|
| Microsoft | Windows Server 2012 R2 |
Affected:
6.3.9600.0 , < 6.3.9600.23228
(custom)
|
|
| Microsoft | Windows Server 2012 R2 (Server Core installation) |
Affected:
6.3.9600.0 , < 6.3.9600.23228
(custom)
|
|
| Microsoft | Windows Server 2016 |
Affected:
10.0.14393.0 , < 10.0.14393.9234
(custom)
|
|
| Microsoft | Windows Server 2016 (Server Core installation) |
Affected:
10.0.14393.0 , < 10.0.14393.9234
(custom)
|
|
| Microsoft | Windows Server 2019 |
Affected:
10.0.17763.0 , < 10.0.17763.8880
(custom)
|
|
| Microsoft | Windows Server 2019 (Server Core installation) |
Affected:
10.0.17763.0 , < 10.0.17763.8880
(custom)
|
|
| Microsoft | Windows Server 2022 |
Affected:
10.0.20348.0 , < 10.0.20348.5256
(custom)
|
|
| Microsoft | Windows Server 2025 |
Affected:
10.0.26100.0 , < 10.0.26100.32995
(custom)
|
|
| Microsoft | Windows Server 2025 (Server Core installation) |
Affected:
10.0.26100.0 , < 10.0.26100.32995
(custom)
|
Date Public
2026-06-09 14:00
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CVE-2026-42801 (GCVE-0-2026-42801)
Vulnerability from cvelistv5 – Published: 2026-09-23 09:03 – Updated: 2026-09-23 15:25
VLAI
EPSS
VEX
Title
Deference after null check in as_rrc
Summary
NULL pointer dereference vulnerability in ASR Crane，Falcon on Linux (as_rrc module) allows Pointer Manipulation.
This vulnerability is associated with program file 3g.mod/lib/src/urrsir.c.
Severity
7.4 (High)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-23 15:25 UTC
CWE
- CWE-476 - NULL pointer dereference
Assigner
ASR
CNA
References
1 reference
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| ASR | Crane，Falcon |
Unaffected:
0 , < 2026/9/20
(date)
|
Date Public
2026-09-23 08:41
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CVE-2026-42800 (GCVE-0-2026-42800)
Vulnerability from cvelistv5 – Published: 2026-04-30 08:52 – Updated: 2026-04-30 13:04
VLAI
EPSS
VEX
Title
Deference after null check in ims_client sip
Summary
NULL pointer dereference vulnerability in ASR1903 in ASR Lapwing_Linux on Linux (ims_client modules) allows Pointer Manipulation.
This vulnerability is associated with program files sip/utils/src/sipuri.c.
Severity
7.4 (High)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-04-30 13:03 UTC
CWE
- CWE-476 - NULL pointer dereference
Assigner
ASR
CNA
References
1 reference
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| ASR | Lapwing_Linux |
Unaffected:
0 , < 2026/4/14
(date)
|
Date Public
2026-04-30 08:00
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CVE-2026-42767 (GCVE-0-2026-42767)
Vulnerability from cvelistv5 – Published: 2026-06-09 16:03 – Updated: 2026-06-10 07:48
VLAI
EPSS
VEX
Title
NULL Pointer Dereference in CRMF EncryptedValue Decryption
Summary
Issue summary: An attacker-controlled CMP (Certificate Management Protocol)
server could trigger a NULL pointer dereference in a CMP client application.
Impact summary: A NULL pointer dereference causes a crash of the
application and a Denial of Service.
An attacker controlling a CMP server (or acting as a man-in-the-middle) could
craft a CMP response containing a CRMF (Certificate Request Message Format)
CertRepMessage with an EncryptedValue structure where the symmAlg field
has an algorithm OID but no parameters field. When the OpenSSL CMP client
processes this response, the NULL dereference occurs, causing a crash of
the CMP client.
Applications that process untrusted CMP/CRMF messages may be affected.
The FIPS modules in 4.0, 3.6, 3.5, 3.4, and 3.0 are not affected by this
issue, as the affected code is outside the OpenSSL FIPS module boundary.
Severity
5.9 (Medium)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-06-09 19:44 UTC
CWE
- CWE-476 - NULL Pointer Dereference
Assigner
openssl
CNA
References
6 references
Impacted products
Date Public
2026-06-09 14:00
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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.