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.

6310 vulnerabilities reference this CWE, most recent first.

CVE-2022-2309 (GCVE-0-2022-2309)

Vulnerability from cvelistv5 – Published: 2022-07-05 09:00 – Updated: 2025-11-04 16:09
VLAI
Title
NULL Pointer Dereference in lxml/lxml
Summary
NULL Pointer Dereference allows attackers to cause a denial of service (or application crash). This only applies when lxml is used together with libxml2 2.9.10 through 2.9.14. libxml2 2.9.9 and earlier are not affected. It allows triggering crashes through forged input data, given a vulnerable code sequence in the application. The vulnerability is caused by the iterwalk function (also used by the canonicalize function). Such code shouldn't be in wide-spread use, given that parsing + iterwalk would usually be replaced with the more efficient iterparse function. However, an XML converter that serialises to C14N would also be vulnerable, for example, and there are legitimate use cases for this code sequence. If untrusted input is received (also remotely) and processed via iterwalk function, a crash can be triggered.
Severity
5.3 (Medium)
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
CWE
  • CWE-476 - NULL Pointer Dereference
Assigner
References
Impacted products
Vendor Product Version
lxml lxml/lxml Affected: unspecified , < 4.9.1 (custom)
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Show details on NVD website
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CVE-2022-2279 (GCVE-0-2022-2279)

Vulnerability from cvelistv5 – Published: 2022-07-01 08:15 – Updated: 2024-08-03 00:32
VLAI
Title
NULL Pointer Dereference in bfabiszewski/libmobi
Summary
NULL Pointer Dereference in GitHub repository bfabiszewski/libmobi prior to 0.11.
Severity
6.6 (Medium)
CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:H
CWE
  • CWE-476 - NULL Pointer Dereference
Assigner
References
Impacted products
Vendor Product Version
bfabiszewski bfabiszewski/libmobi Affected: unspecified , < 0.11 (custom)
Create a notification for this product.
Show details on NVD website
To clipboard 

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CVE-2022-2231 (GCVE-0-2022-2231)

Vulnerability from cvelistv5 – Published: 2022-06-28 00:00 – Updated: 2024-08-03 00:32
VLAI
Title
NULL Pointer Dereference in vim/vim
Summary
NULL Pointer Dereference in GitHub repository vim/vim prior to 8.2.
Severity
7.8 (High)
CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
CWE
  • CWE-476 - NULL Pointer Dereference
Assigner
References
Impacted products
Vendor Product Version
vim vim/vim Affected: unspecified , < 8.2 (custom)
Create a notification for this product.
Show details on NVD website
To clipboard 

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CVE-2022-2208 (GCVE-0-2022-2208)

Vulnerability from cvelistv5 – Published: 2022-06-27 00:00 – Updated: 2024-08-03 00:32
VLAI
Title
NULL Pointer Dereference in vim/vim
Summary
NULL Pointer Dereference in GitHub repository vim/vim prior to 8.2.5163.
Severity
7.8 (High)
CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
CWE
  • CWE-476 - NULL Pointer Dereference
Assigner
References
Impacted products
Vendor Product Version
vim vim/vim Affected: unspecified , < 8.2.5163 (custom)
Create a notification for this product.
Show details on NVD website
To clipboard 

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CVE-2022-2153 (GCVE-0-2022-2153)

Vulnerability from cvelistv5 – Published: 2022-08-31 00:00 – Updated: 2024-08-03 00:32
VLAI
Summary
A flaw was found in the Linux kernel’s KVM when attempting to set a SynIC IRQ. This issue makes it possible for a misbehaving VMM to write to SYNIC/STIMER MSRs, causing a NULL pointer dereference. This flaw allows an unprivileged local attacker on the host to issue specific ioctl calls, causing a kernel oops condition that results in a denial of service.
Severity
No CVSS data available.
CWE
Assigner
References
Impacted products
Vendor Product Version
n/a kernel Affected: kernel 5.18
Show details on NVD website
To clipboard 

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CVE-2022-2121 (GCVE-0-2022-2121)

Vulnerability from cvelistv5 – Published: 2022-06-24 15:00 – Updated: 2025-11-03 20:34
VLAI
Title
OFFIS DCMTK NULL Pointer Dereference
Summary
OFFIS DCMTK's (All versions prior to 3.6.7) has a NULL pointer dereference vulnerability while processing DICOM files, which may result in a denial-of-service condition.
Severity
7.5 (High)
CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
SSVC
Exploitation: none Automatable: no Technical Impact: total
CISA Coordinator (v2.0.3)
CWE
  • CWE-476 - NULL Pointer Dereference
Assigner
References
Impacted products
Vendor Product Version
OFFIS DCMTK Affected: unspecified , < 3.6.7 (custom)
Create a notification for this product.
offis dcmtk Affected: 0 , < 3.6.7 (custom)
    cpe:2.3:a:offis:dcmtk:*:*:*:*:*:*:*:*
 Create a notification for this product.
Date Public
2022-06-23 00:00
Show details on NVD website
To clipboard 

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CVE-2022-2085 (GCVE-0-2022-2085)

Vulnerability from cvelistv5 – Published: 2022-06-16 00:00 – Updated: 2025-02-13 16:28
VLAI
Summary
A NULL pointer dereference vulnerability was found in Ghostscript, which occurs when it tries to render a large number of bits in memory. When allocating a buffer device, it relies on an init_device_procs defined for the device that uses it as a prototype that depends upon the number of bits per pixel. For bpp > 64, mem_x_device is used and does not have an init_device_procs defined. This flaw allows an attacker to parse a large number of bits (more than 64 bits per pixel), which triggers a NULL pointer dereference flaw, causing an application to crash.
Severity
No CVSS data available.
CWE
  • CWE-476 - - NULL Pointer Dereference
Assigner
References
Impacted products
Vendor Product Version
n/a GhostScript Affected: Affects in Ghostscript v9.55.0
Show details on NVD website
To clipboard 

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CVE-2022-1852 (GCVE-0-2022-1852)

Vulnerability from cvelistv5 – Published: 2022-06-30 12:42 – Updated: 2024-08-03 00:17
VLAI
Summary
A NULL pointer dereference flaw was found in the Linux kernel’s KVM module, which can lead to a denial of service in the x86_emulate_insn in arch/x86/kvm/emulate.c. This flaw occurs while executing an illegal instruction in guest in the Intel CPU.
Severity
No CVSS data available.
CWE
Assigner
References
Impacted products
Vendor Product Version
n/a kernel Affected: kernel 5.19 rc1
Show details on NVD website
To clipboard 

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CVE-2022-1789 (GCVE-0-2022-1789)

Vulnerability from cvelistv5 – Published: 2022-05-31 18:48 – Updated: 2024-08-03 00:16
VLAI
Summary
With shadow paging enabled, the INVPCID instruction results in a call to kvm_mmu_invpcid_gva. If INVPCID is executed with CR0.PG=0, the invlpg callback is not set and the result is a NULL pointer dereference.
Severity
No CVSS data available.
CWE
Assigner
References
Impacted products
Vendor Product Version
n/a kernel Affected: no patch information available yet
Show details on NVD website
To clipboard 

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CVE-2022-1748 (GCVE-0-2022-1748)

Vulnerability from cvelistv5 – Published: 2022-08-17 20:08 – Updated: 2025-04-16 16:13
VLAI
Title
Softing Secure Integration Server NULL Pointer Dereference
Summary
Softing OPC UA C++ Server SDK, Secure Integration Server, edgeConnector, edgeAggregator, OPC Suite, and uaGate are affected by a NULL pointer dereference vulnerability.
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 (v2.0.3)
CWE
  • CWE-476 - NULL Pointer Dereference
Assigner
References
Impacted products
Credits
Pedro Ribeiro and Radek Domanski, working with Trend Micro Zero Day Initiative, reported these vulnerabilities to Softing and CISA.
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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