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.

6357 vulnerabilities reference this CWE, most recent first.

CVE-2020-35525 (GCVE-0-2020-35525)

Vulnerability from cvelistv5 – Published: 2022-09-01 00:00 – Updated: 2024-08-04 17:02
VLAI
Summary
In SQlite 3.31.1, a potential null pointer derreference was found in the INTERSEC query processing.
Severity
No CVSS data available.
CWE
Assigner
References
Impacted products
Vendor Product Version
n/a sqlite Affected: sqlite 3.31.1
Show details on NVD website
To clipboard 

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CVE-2020-35507 (GCVE-0-2020-35507)

Vulnerability from cvelistv5 – Published: 2021-01-04 14:24 – Updated: 2024-08-04 17:02
VLAI
Summary
There's a flaw in bfd_pef_parse_function_stubs of bfd/pef.c in binutils in versions prior to 2.34 which could allow an attacker who is able to submit a crafted file to be processed by objdump to cause a NULL pointer dereference. The greatest threat of this flaw is to application availability.
Severity
No CVSS data available.
CWE
Assigner
References
Impacted products
Vendor Product Version
n/a binutils Affected: binutils 2.34
Show details on NVD website
To clipboard 

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CVE-2020-35505 (GCVE-0-2020-35505)

Vulnerability from cvelistv5 – Published: 2021-05-28 10:20 – Updated: 2024-08-04 17:02
VLAI
Summary
A NULL pointer dereference flaw was found in the am53c974 SCSI host bus adapter emulation of QEMU in versions before 6.0.0. This issue occurs while handling the 'Information Transfer' command. This flaw allows a privileged guest user to crash the QEMU process on the host, resulting in a denial of service. The highest threat from this vulnerability is to system availability.
Severity
No CVSS data available.
CWE
Assigner
References
Impacted products
Vendor Product Version
n/a QEMU Affected: qemu 6.0.0
Show details on NVD website
To clipboard 

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CVE-2020-35504 (GCVE-0-2020-35504)

Vulnerability from cvelistv5 – Published: 2021-05-28 10:20 – Updated: 2024-08-04 17:02
VLAI
Summary
A NULL pointer dereference flaw was found in the SCSI emulation support of QEMU in versions before 6.0.0. This flaw allows a privileged guest user to crash the QEMU process on the host, resulting in a denial of service. The highest threat from this vulnerability is to system availability.
Severity
No CVSS data available.
CWE
Assigner
References
Impacted products
Vendor Product Version
n/a QEMU Affected: qemu 6.0.0
Show details on NVD website
To clipboard 

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CVE-2020-35503 (GCVE-0-2020-35503)

Vulnerability from cvelistv5 – Published: 2021-06-02 13:22 – Updated: 2024-08-04 17:02
VLAI
Summary
A NULL pointer dereference flaw was found in the megasas-gen2 SCSI host bus adapter emulation of QEMU in versions before and including 6.0. This issue occurs in the megasas_command_cancelled() callback function while dropping a SCSI request. This flaw allows a privileged guest user to crash the QEMU process on the host, resulting in a denial of service. The highest threat from this vulnerability is to system availability.
Severity
No CVSS data available.
CWE
Assigner
References
Impacted products
Vendor Product Version
n/a QEMU Affected: All QEMU versions before and including 6.0
Show details on NVD website
To clipboard 

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CVE-2020-35499 (GCVE-0-2020-35499)

Vulnerability from cvelistv5 – Published: 2021-02-19 19:49 – Updated: 2024-08-04 17:02
VLAI
Summary
A NULL pointer dereference flaw in Linux kernel versions prior to 5.11 may be seen if sco_sock_getsockopt function in net/bluetooth/sco.c do not have a sanity check for a socket connection, when using BT_SNDMTU/BT_RCVMTU for SCO sockets. This could allow a local attacker with a special user privilege to crash the system (DOS) or leak kernel internal information.
Severity
No CVSS data available.
CWE
Assigner
References
Impacted products
Vendor Product Version
n/a kernel Affected: kernel 5.11
Show details on NVD website
To clipboard 

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CVE-2020-35496 (GCVE-0-2020-35496)

Vulnerability from cvelistv5 – Published: 2021-01-04 14:24 – Updated: 2024-08-04 17:02
VLAI
Summary
There's a flaw in bfd_pef_scan_start_address() of bfd/pef.c in binutils which could allow an attacker who is able to submit a crafted file to be processed by objdump to cause a NULL pointer dereference. The greatest threat of this flaw is to application availability. This flaw affects binutils versions prior to 2.34.
Severity
No CVSS data available.
CWE
Assigner
References
Impacted products
Vendor Product Version
n/a binutils Affected: binutils 2.34
Show details on NVD website
To clipboard 

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CVE-2020-35495 (GCVE-0-2020-35495)

Vulnerability from cvelistv5 – Published: 2021-01-04 14:23 – Updated: 2024-08-04 17:02
VLAI
Summary
There's a flaw in binutils /bfd/pef.c. An attacker who is able to submit a crafted input file to be processed by the objdump program could cause a null pointer dereference. The greatest threat from this flaw is to application availability. This flaw affects binutils versions prior to 2.34.
Severity
No CVSS data available.
CWE
Assigner
References
Impacted products
Vendor Product Version
n/a binutils Affected: binutils 2.34
Show details on NVD website
To clipboard 

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CVE-2020-27830 (GCVE-0-2020-27830)

Vulnerability from cvelistv5 – Published: 2021-05-13 14:15 – Updated: 2024-08-04 16:25
VLAI
Summary
A vulnerability was found in Linux Kernel where in the spk_ttyio_receive_buf2() function, it would dereference spk_ttyio_synth without checking whether it is NULL or not, and may lead to a NULL-ptr deref crash.
Severity
No CVSS data available.
CWE
Assigner
References
Impacted products
Vendor Product Version
n/a kernel Affected: kernel 5.9.14
Show details on NVD website
To clipboard 

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CVE-2020-27819 (GCVE-0-2020-27819)

Vulnerability from cvelistv5 – Published: 2021-02-23 03:40 – Updated: 2024-08-04 16:25
VLAI
Summary
An issue was discovered in libxls before and including 1.6.1 when reading Microsoft Excel files. A NULL pointer dereference vulnerability exists when parsing XLS cells in libxls/xls2csv.c:199. It could allow a remote attacker to cause a denial of service via crafted XLS file.
Severity
No CVSS data available.
CWE
Assigner
References
Impacted products
Vendor Product Version
n/a libxls Affected: libxls before 1.6.2
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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