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.

6306 vulnerabilities reference this CWE, most recent first.

CVE-2023-4385 (GCVE-0-2023-4385)

Vulnerability from cvelistv5 – Published: 2023-08-16 16:49 – Updated: 2025-11-20 18:27
VLAI
Title
Kernel: jfs: null pointer dereference in dbfree()
Summary
A NULL pointer dereference flaw was found in dbFree in fs/jfs/jfs_dmap.c in the journaling file system (JFS) in the Linux Kernel. This issue may allow a local attacker to crash the system due to a missing sanity check.
Severity
5.5 (Medium)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
  • CWE-476 - NULL Pointer Dereference
Assigner
References
Impacted products
Date Public
2022-04-11 00:00
Show details on NVD website
To clipboard 

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CVE-2023-3772 (GCVE-0-2023-3772)

Vulnerability from cvelistv5 – Published: 2023-07-25 15:47 – Updated: 2025-11-07 13:03
VLAI
Title
Kernel: xfrm: null pointer dereference in xfrm_update_ae_params()
Summary
A flaw was found in the Linux kernel’s IP framework for transforming packets (XFRM subsystem). This issue may allow a malicious user with CAP_NET_ADMIN privileges to directly dereference a NULL pointer in xfrm_update_ae_params(), leading to a possible kernel crash and denial of service.
Severity
5.5 (Medium)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
CWE
  • CWE-476 - NULL Pointer Dereference
Assigner
References
Impacted products
Vendor Product Version
Red Hat Red Hat Enterprise Linux 8 Unaffected: 0:4.18.0-513.5.1.rt7.307.el8_9 , < * (rpm)
    cpe:/a:redhat:enterprise_linux:8::realtime
    cpe:/a:redhat:enterprise_linux:8::nfv
 Create a notification for this product.
Red Hat Red Hat Enterprise Linux 8 Unaffected: 0:4.18.0-513.5.1.el8_9 , < * (rpm)
    cpe:/o:redhat:enterprise_linux:8::baseos
    cpe:/a:redhat:enterprise_linux:8::crb
 Create a notification for this product.
Red Hat Red Hat Enterprise Linux 8.6 Extended Update Support Unaffected: 0:4.18.0-372.87.1.el8_6 , < * (rpm)
    cpe:/o:redhat:rhel_eus:8.6::baseos
    cpe:/a:redhat:rhel_eus:8.6::crb
    cpe:/o:redhat:rhev_hypervisor:4.4::el8
 Create a notification for this product.
Red Hat Red Hat Enterprise Linux 8.8 Extended Update Support Unaffected: 0:4.18.0-477.43.1.el8_8 , < * (rpm)
    cpe:/a:redhat:rhel_eus:8.8::crb
    cpe:/o:redhat:rhel_eus:8.8::baseos
 Create a notification for this product.
Red Hat Red Hat Enterprise Linux 9 Unaffected: 0:5.14.0-362.8.1.el9_3 , < * (rpm)
    cpe:/a:redhat:enterprise_linux:9::appstream
    cpe:/a:redhat:enterprise_linux:9::nfv
    cpe:/o:redhat:enterprise_linux:9::baseos
    cpe:/a:redhat:enterprise_linux:9::crb
    cpe:/a:redhat:enterprise_linux:9::realtime
 Create a notification for this product.
Red Hat Red Hat Virtualization 4 for Red Hat Enterprise Linux 8 Unaffected: 0:4.18.0-372.87.1.el8_6 , < * (rpm)
    cpe:/o:redhat:rhel_eus:8.6::baseos
    cpe:/a:redhat:rhel_eus:8.6::crb
    cpe:/o:redhat:rhev_hypervisor:4.4::el8
 Create a notification for this product.
Red Hat Red Hat Enterprise Linux 6     cpe:/o:redhat:enterprise_linux:6
 Create a notification for this product.
Red Hat Red Hat Enterprise Linux 7     cpe:/o:redhat:enterprise_linux:7
 Create a notification for this product.
Red Hat Red Hat Enterprise Linux 9     cpe:/o:redhat:enterprise_linux:9
 Create a notification for this product.
Date Public
2023-07-21 00:00
Credits
Red Hat would like to thank Lin Ma (ZJU & Ant Security Light-Year Lab) for reporting this issue.
Show details on NVD website
To clipboard 

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CVE-2023-3603 (GCVE-0-2023-3603)

Vulnerability from cvelistv5 – Published: 2023-07-21 19:09 – Updated: 2024-09-26 20:04
VLAI
Title
Processing sftp server read may cause null dereference
Summary
A missing allocation check in sftp server processing read requests may cause a NULL dereference on low-memory conditions. The malicious client can request up to 4GB SFTP reads, causing allocation of up to 4GB buffers, which was not being checked for failure. This will likely crash the authenticated user's sftp server connection (if implemented as forking as recommended). For thread-based servers, this might also cause DoS for legitimate users. Given this code is not in any released versions, no security releases have been issued.
Severity
3.1 (Low)
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:L
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
  • CWE-476 - NULL Pointer Dereference
Assigner
References
URL Tags
https://access.redhat.com/security/cve/CVE-2023-3603 vdb-entryx_refsource_REDHAT
https://bugzilla.redhat.com/show_bug.cgi?id=2221791 issue-trackingx_refsource_REDHAT
Impacted products
Date Public
2023-07-10 00:00
Credits
Upstream acknowledges Wei Chong Tan as the original reporter.
Show details on NVD website
To clipboard 

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CVE-2023-3359 (GCVE-0-2023-3359)

Vulnerability from cvelistv5 – Published: 2023-06-28 00:00 – Updated: 2025-03-07 15:15
VLAI
Summary
An issue was discovered in the Linux kernel brcm_nvram_parse in drivers/nvmem/brcm_nvram.c. Lacks for the check of the return value of kzalloc() can cause the NULL Pointer Dereference.
Severity
5.5 (Medium)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
Assigner
References
Impacted products
Vendor Product Version
n/a Kernel Affected: kernel 6.1-rc8
Show details on NVD website
To clipboard 

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CVE-2023-3358 (GCVE-0-2023-3358)

Vulnerability from cvelistv5 – Published: 2023-06-28 00:00 – Updated: 2025-03-10 21:07
VLAI
Summary
A null pointer dereference was found in the Linux kernel's Integrated Sensor Hub (ISH) driver. This issue could allow a local user to crash the system.
Severity
5.5 (Medium)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
Assigner
References
Impacted products
Vendor Product Version
n/a Kernel Affected: kernel 6.1-rc8
Show details on NVD website
To clipboard 

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CVE-2023-3357 (GCVE-0-2023-3357)

Vulnerability from cvelistv5 – Published: 2023-06-28 00:00 – Updated: 2025-03-10 21:07
VLAI
Summary
A NULL pointer dereference flaw was found in the Linux kernel AMD Sensor Fusion Hub driver. This flaw allows a local user to crash the system.
Severity
5.5 (Medium)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
Assigner
References
Impacted products
Vendor Product Version
n/a Kernel Affected: kernel 6.1-rc8
Show details on NVD website
To clipboard 

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CVE-2023-3355 (GCVE-0-2023-3355)

Vulnerability from cvelistv5 – Published: 2023-06-28 00:00 – Updated: 2025-03-05 18:55
VLAI
Title
Null pointer dereference in submit_lookup_cmds() in drivers/gpu/drm/msm/msm_gem_submit.c
Summary
A NULL pointer dereference flaw was found in the Linux kernel's drivers/gpu/drm/msm/msm_gem_submit.c code in the submit_lookup_cmds function, which fails because it lacks a check of the return value of kmalloc(). This issue allows a local user to crash the system.
Severity
4.7 (Medium)
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
  • CWE-476 - NULL Pointer Dereference
Assigner
References
Impacted products
Date Public
2023-06-26 00:00
Credits
Red Hat would like to thank Jiasheng Jiang (Institute of Software Chinese Academy of Sciences) for reporting this issue.
Show details on NVD website
To clipboard 

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CVE-2023-3354 (GCVE-0-2023-3354)

Vulnerability from cvelistv5 – Published: 2023-07-11 16:16 – Updated: 2025-02-13 16:55
VLAI
Title
Improper i/o watch removal in tls handshake can lead to remote unauthenticated denial of service
Summary
A flaw was found in the QEMU built-in VNC server. When a client connects to the VNC server, QEMU checks whether the current number of connections crosses a certain threshold and if so, cleans up the previous connection. If the previous connection happens to be in the handshake phase and fails, QEMU cleans up the connection again, resulting in a NULL pointer dereference issue. This could allow a remote unauthenticated client to cause a denial of service.
Severity
7.5 (High)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CWE
  • CWE-476 - NULL Pointer Dereference
Assigner
References
Impacted products
Date Public
2023-06-28 00:00
Credits
Red Hat would like to thank jiangyegen (Huawei Vulnerability Management Center) and yexiao7 (Huawei Vulnerability Management Center) for reporting this issue.
Show details on NVD website
To clipboard 

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CVE-2023-3338 (GCVE-0-2023-3338)

Vulnerability from cvelistv5 – Published: 2023-06-30 00:00 – Updated: 2025-03-05 18:55
VLAI
Title
Crash due to a null pointer dereference in the dn_nsp_send function
Summary
A null pointer dereference flaw was found in the Linux kernel's DECnet networking protocol. This issue could allow a remote user to crash the system.
Severity
6.5 (Medium)
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
SSVC
Exploitation: poc Automatable: no Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
  • CWE-476 - NULL Pointer Dereference
Assigner
References
Impacted products
Date Public
2023-06-26 00:00
Credits
Red Hat would like to thank Davide Ornaghi (Betrusted Srl) for reporting this issue.
Show details on NVD website
To clipboard 

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CVE-2023-3316 (GCVE-0-2023-3316)

Vulnerability from cvelistv5 – Published: 2023-06-19 11:10 – Updated: 2025-11-03 20:35
VLAI
Title
A NULL pointer dereference in TIFFClose() is caused by a failure to open an output file (non-existent path or a path that requires permissions like /dev/null) while specifying zones.
Summary
A NULL pointer dereference in TIFFClose() is caused by a failure to open an output file (non-existent path or a path that requires permissions like /dev/null) while specifying zones.
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: none Automatable: no Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
  • CWE-476 - NULL Pointer Dereference
Assigner
References
Impacted products
Vendor Product Version
libtiff libtiff Affected: 3.9.0 , < 4.5.1 (git)
Create a notification for this product.
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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