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-2026-113680 (GCVE-0-2026-113680)

Vulnerability from cvelistv5 – Published: 2026-10-20 15:40 – Updated: 2026-10-21 15:54
VLAI
Title
HarfBuzz 8.0.0 through 14.6.0 WebAssembly Shaper NULL Pointer Dereference DoS
Summary
HarfBuzz from 8.0.0 through 14.6.0 contains a NULL pointer dereference vulnerability in the experimental WebAssembly shaper host imports buffer_set_contents, face_create, and font_set_coords. Attackers can supply a crafted font whose embedded wasm module passes out-of-range addresses with non-zero lengths, crashing any application that shapes text with the font.
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: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-10-21 14:24 UTC
CWE
  • CWE-476 - NULL Pointer Dereference
Assigner
VulnCheck CNA
References
Impacted products
Vendor Product Version
harfbuzz harfbuzz Affected: 8.0.0 , ≤ 14.6.0 (semver)
    cpe:2.3:a:harfbuzz_project:harfbuzz:*:*:*:*:*:*:*:*
Create a notification for this product.
Date Public
2026-10-19 21:41
Credits
Aziz Elbelaychy (Ostorlab)
Show details on NVD website
To clipboard 

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CVE-2026-112405 (GCVE-0-2026-112405)

Vulnerability from cvelistv5 – Published: 2026-10-19 21:29 – Updated: 2026-10-20 15:56
VLAI
Title
Pillow: NULL pointer dereference in Image.merge via an unvalidated band 0
Summary
Pillow is a Python imaging library. From 12.0.0 until 13.0.0, Pillow's Image.merge() can dereference a null image8 plane. Validation skips the first input band, allowing a 32-bit integer or floating-point image backed by image32 storage to be merged as a narrower multiband image. A crafted IPTC file can reach this path when an application opens and loads it, or a caller can invoke Image.merge() directly with such a first band. This causes a native process crash. This issue is fixed in version 13.0.0.
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
SSVC
Exploitation: poc Automatable: yes Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-10-20 15:56 UTC
CWE
  • CWE-476 - NULL Pointer Dereference
Assigner
GitHub_M CNA
References
Impacted products
Vendor Product Version
python-pillow Pillow Affected: >= 12.0.0, < 13.0.0
Create a notification for this product.
Show details on NVD website
To clipboard 

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CVE-2026-112392 (GCVE-0-2026-112392)

Vulnerability from cvelistv5 – Published: 2026-10-19 21:17 – Updated: 2026-10-20 14:50
VLAI
Title
Pillow: NULL dereference in ImagingExpand via rank filters on zero-size images
Summary
Pillow is a Python imaging library. Prior to 13.0.0, Pillow's rank-based filters can dereference invalid image storage for a zero-size image. ImagingExpand() allocates a non-empty output and then faults while replicating edges by reading the first pixel from empty input storage; ImagingRankFilter is never reached. An attacker can supply or cause creation of a zero-size image to an application that applies a rank, median, minimum, or maximum filter. This causes a native process crash. This issue is fixed in version 13.0.0.
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
SSVC
Exploitation: poc Automatable: yes Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-10-20 14:49 UTC
CWE
  • CWE-476 - NULL Pointer Dereference
Assigner
GitHub_M CNA
References
Impacted products
Vendor Product Version
python-pillow Pillow Affected: < 13.0.0
Create a notification for this product.
Show details on NVD website
To clipboard 

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CVE-2026-112381 (GCVE-0-2026-112381)

Vulnerability from cvelistv5 – Published: 2026-10-21 19:20 – Updated: 2026-10-23 21:20
VLAI
Title
Apache Traffic Server: Nullptr dereference in net_write_io on a POST half-close with chunked response
Summary
Apache Traffic Server can crash with a null pointer dereference when a client POST request is torn down via half-close while a chunked origin response is being reparsed from a reentrant write-ready callback, a timing-dependent race introduced by the CVE-2021-32564 flow-control backports. This issue affects Apache Traffic Server: 9.2.15, 10.1.4, 10.2.0. Users are recommended to upgrade to version 9.2.16, 10.1.5, or 10.2.1, which fix the issue.
Severity
5.9 (Medium)
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
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
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-10-23 20:43 UTC
CWE
  • CWE-476 - NULL Pointer Dereference
Assigner
apache CNA
References
Impacted products
Vendor Product Version
Apache Software Foundation Apache Traffic Server Affected: 9.2.15 (semver)
Affected: 10.1.4 (semver)
Affected: 10.2.0 (semver)
Create a notification for this product.
Credits
Masaori Koshiba
Show details on NVD website
To clipboard 

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CVE-2026-112318 (GCVE-0-2026-112318)

Vulnerability from cvelistv5 – Published: 2026-11-09 19:08 – Updated: 2026-11-09 19:08
VLAI
Title
Krb5: mit krb5 kadmind authenticated dos exploiting dereference of null policy name pointers
Summary
The policy RPC stubs in kadmin/server/server_stubs.c in MIT Kerberos 5 (aka krb5) 1.5.3 and later do not reject a NULL policy name decoded by xdr_nullstring(), which allows remote authenticated users to cause a denial of service (kadmind crash via NULL pointer dereference) by sending a policy request with an empty policy name that reaches authorization checks or logging code.
Severity
6.5 (Medium)
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
CWE
  • CWE-476 - NULL Pointer Dereference
Assigner
redhat CNA
References
URL Tags
https://access.redhat.com/security/cve/CVE-2026-112318 vdb-entryx_refsource_REDHAT
https://bugzilla.redhat.com/show_bug.cgi?id=2478792 issue-trackingx_refsource_REDHAT
Impacted products
Date Public
2026-11-09 15:00
Credits
This issue was discovered by Found by AISLE in partnership with Red Hat.
Show details on NVD website
To clipboard 

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CVE-2026-112259 (GCVE-0-2026-112259)

Vulnerability from cvelistv5 – Published: 2026-10-19 18:42 – Updated: 2026-11-05 16:28
VLAI
Title
Gimp: gimp: null pointer dereference in swatchbooker (sbz) palette import
Summary
A flaw was found in GIMP. Importing a crafted SBZ palette without a color-model attribute can cause a NULL pointer dereference during string comparison, resulting in denial of service of the GIMP application.
Severity
5.5 (Medium)
CVSS:3.1/AV:L/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 2026-10-22 20:57 UTC
CWE
  • CWE-476 - NULL Pointer Dereference
Assigner
redhat CNA
References
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https://access.redhat.com/security/cve/CVE-2026-112259 vdb-entryx_refsource_REDHAT
https://bugzilla.redhat.com/show_bug.cgi?id=2555595 issue-trackingx_refsource_REDHAT
Impacted products
Date Public
2026-10-05 00:00
Credits
Red Hat would like to thank Alexey Khairov (codem4ster), Konstantin Talgarenko (Marcusov), and Nikolay Kravtsov (Kolya080808) for reporting this issue.
Show details on NVD website
To clipboard 

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CVE-2026-111736 (GCVE-0-2026-111736)

Vulnerability from cvelistv5 – Published: 2026-10-29 15:43 – Updated: 2026-11-05 21:26
VLAI
Title
NULL pointer dereference on implicit read of user specific record index
Summary
P-Net before 1.0.3 dereferences a NULL AR pointer in pf_fspm_cm_read_ind() when handling an implicit read request without a valid target AR UUID for a user specific record index, if the application has registered a read callback. A remote unauthenticated attacker can send such a request to crash the device (denial of service).
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
SSVC
Exploitation: none Automatable: yes Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-11-05 21:26 UTC
CWE
  • CWE-476 - NULL Pointer Dereference
Assigner
rt-labs CNA
References
Impacted products
Vendor Product Version
RT-Labs P-Net Affected: 0 , < 1.0.3 (semver)
Create a notification for this product.
Show details on NVD website
To clipboard 

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CVE-2026-111733 (GCVE-0-2026-111733)

Vulnerability from cvelistv5 – Published: 2026-10-29 15:41 – Updated: 2026-11-05 21:22
VLAI
Title
NULL pointer dereference on implicit read of AR specific record index
Summary
P-Net before 1.0.3 dereferences a NULL AR pointer when handling an implicit read request without a valid target AR UUID for a record index that requires an AR (AR specific indices 0xE000-0xEFFF, and the expected identification data of a slot or subslot). A remote unauthenticated attacker can send such a request to crash the device (denial of service).
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
SSVC
Exploitation: none Automatable: yes Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-11-05 21:22 UTC
CWE
  • CWE-476 - NULL Pointer Dereference
Assigner
rt-labs CNA
References
Impacted products
Vendor Product Version
RT-Labs P-Net Affected: 0 , < 1.0.3 (semver)
Create a notification for this product.
Credits
f0rw4rd (quellsec.dev)
Show details on NVD website
To clipboard 

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CVE-2026-111710 (GCVE-0-2026-111710)

Vulnerability from cvelistv5 – Published: 2026-10-16 17:40 – Updated: 2026-10-19 14:03
VLAI
Title
Netcore NR256CN through 1.5.140116 Boa Web Server NULL Pointer Dereference DoS
Summary
Netcore NR256CN through 1.5.140116 contains a NULL pointer dereference vulnerability in the Boa web server's user_auth() function that allows unauthenticated attackers to crash the server via a malformed Authorization header. Attackers can send a Basic Authorization value lacking a colon, such as one decoding to a single character, to protected routes like /router/get_user_type.cgi to kill the main Boa process and deny management interface access.
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 2026-10-19 14:03 UTC
CWE
  • CWE-476 - NULL Pointer Dereference
Assigner
VulnCheck CNA
References
Impacted products
Vendor Product Version
Netcore NR256CN Affected: 0 , ≤ 1.5.140116 (custom)
Create a notification for this product.
Date Public
2026-10-16 00:00
Credits
Zhou Ao Yin Luxing Lu Fangzhou Liu Xin
Show details on NVD website
To clipboard 

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CVE-2026-111373 (GCVE-0-2026-111373)

Vulnerability from cvelistv5 – Published: 2026-10-16 01:17 – Updated: 2026-10-16 16:25
VLAI
Title
FreeRDP before 3.32.0 NULL Dereference via Zero-Length WebSocket Ping
Summary
FreeRDP before 3.32.0 contains a NULL pointer dereference vulnerability in the websocket transport that allows a malicious gateway to crash clients by sending zero-length pings. When the payload length is zero, websocket_reply_pong passes a nullptr stream to websocket_reply_close, triggering an assertion failure that terminates the client process and causes denial of service.
Severity
6.9 (Medium)
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N
5.3 (Medium)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
SSVC
Exploitation: none Automatable: yes Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-10-16 16:25 UTC
CWE
  • CWE-476 - NULL Pointer Dereference
Assigner
VulnCheck CNA
References
Impacted products
Vendor Product Version
FreeRDP FreeRDP Affected: 0 , < 3.32.0 (semver)
Unaffected: 3.32.0 (semver)
    cpe:2.3:a:freerdp:freerdp:*:*:*:*:*:*:*:*
Create a notification for this product.
Date Public
2026-10-01 00:00
Credits
w226688
Show details on NVD website
To clipboard 

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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.

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