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.
6769 vulnerabilities reference this CWE, most recent first.
CVE-2022-0696 (GCVE-0-2022-0696)
Vulnerability from cvelistv5 – Published: 2022-02-21 00:00 – Updated: 2024-08-02 23:40
VLAI
EPSS
VEX
Title
NULL Pointer Dereference in vim/vim
Summary
NULL Pointer Dereference in GitHub repository vim/vim prior to 8.2.4428.
Severity
6.2 (Medium)
CWE
- CWE-476 - NULL Pointer Dereference
References
7 references
Impacted products
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CVE-2022-0632 (GCVE-0-2022-0632)
Vulnerability from cvelistv5 – Published: 2022-02-19 14:00 – Updated: 2024-08-02 23:32
VLAI
EPSS
VEX
Title
NULL Pointer Dereference in mruby/mruby
Summary
NULL Pointer Dereference in Homebrew mruby prior to 3.2.
Severity
5.5 (Medium)
CWE
- CWE-476 - NULL Pointer Dereference
References
2 references
| URL | Tags |
|---|---|
| https://huntr.dev/bounties/3e5bb8f6-30fd-4553-86d… | x_refsource_CONFIRM |
| https://github.com/mruby/mruby/commit/44f591aa8f7… | x_refsource_MISC |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| mruby | mruby/mruby |
Affected:
unspecified , < 3.2
(custom)
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CVE-2022-0617 (GCVE-0-2022-0617)
Vulnerability from cvelistv5 – Published: 2022-02-16 16:38 – Updated: 2024-08-02 23:32
VLAI
EPSS
VEX
Summary
A flaw null pointer dereference in the Linux kernel UDF file system functionality was found in the way user triggers udf_file_write_iter function for the malicious UDF image. A local user could use this flaw to crash the system. Actual from Linux kernel 4.2-rc1 till 5.17-rc2.
Severity
No CVSS data available.
CWE
Assigner
References
8 references
| URL | Tags |
|---|---|
| https://git.kernel.org/pub/scm/linux/kernel/git/t… | x_refsource_MISC |
| https://git.kernel.org/pub/scm/linux/kernel/git/t… | x_refsource_MISC |
| https://lore.kernel.org/lkml/20220114172329.ygzry… | x_refsource_MISC |
| https://lists.debian.org/debian-lts-announce/2022… | mailing-listx_refsource_MLIST |
| https://lists.debian.org/debian-lts-announce/2022… | mailing-listx_refsource_MLIST |
| https://www.debian.org/security/2022/dsa-5095 | vendor-advisoryx_refsource_DEBIAN |
| https://www.debian.org/security/2022/dsa-5096 | vendor-advisoryx_refsource_DEBIAN |
| http://www.openwall.com/lists/oss-security/2022/04/13/2 | mailing-listx_refsource_MLIST |
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CVE-2022-0481 (GCVE-0-2022-0481)
Vulnerability from cvelistv5 – Published: 2022-02-04 22:33 – Updated: 2024-08-02 23:32
VLAI
EPSS
VEX
Title
NULL Pointer Dereference in mruby/mruby
Summary
NULL Pointer Dereference in Homebrew mruby prior to 3.2.
Severity
5.5 (Medium)
CWE
- CWE-476 - NULL Pointer Dereference
References
2 references
| URL | Tags |
|---|---|
| https://huntr.dev/bounties/54725c8c-87f4-41b6-878… | x_refsource_CONFIRM |
| https://github.com/mruby/mruby/commit/ae3c99767a2… | x_refsource_MISC |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| mruby | mruby/mruby |
Affected:
unspecified , < 3.2
(custom)
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CVE-2022-0419 (GCVE-0-2022-0419)
Vulnerability from cvelistv5 – Published: 2022-02-01 10:38 – Updated: 2024-08-02 23:25
VLAI
EPSS
VEX
Title
NULL Pointer Dereference in radareorg/radare2
Summary
NULL Pointer Dereference in GitHub repository radareorg/radare2 prior to 5.6.0.
Severity
5.9 (Medium)
CWE
- CWE-476 - NULL Pointer Dereference
References
6 references
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|---|---|
| https://huntr.dev/bounties/1f84e79d-70e7-4b29-8b4… | x_refsource_CONFIRM |
| https://github.com/radareorg/radare2/commit/feaa4… | x_refsource_MISC |
| https://lists.fedoraproject.org/archives/list/pac… | vendor-advisoryx_refsource_FEDORA |
| https://lists.fedoraproject.org/archives/list/pac… | vendor-advisoryx_refsource_FEDORA |
| https://census-labs.com/news/2022/05/24/multiple-… | x_refsource_MISC |
| http://www.openwall.com/lists/oss-security/2022/05/25/1 | mailing-listx_refsource_MLIST |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| radareorg | radareorg/radare2 |
Affected:
unspecified , < 5.6.0
(custom)
|
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CVE-2022-0326 (GCVE-0-2022-0326)
Vulnerability from cvelistv5 – Published: 2022-01-21 06:45 – Updated: 2024-08-02 23:25
VLAI
EPSS
VEX
Title
NULL Pointer Dereference in mruby/mruby
Summary
NULL Pointer Dereference in Homebrew mruby prior to 3.2.
Severity
5.5 (Medium)
CWE
- CWE-476 - NULL Pointer Dereference
References
2 references
| URL | Tags |
|---|---|
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| https://github.com/mruby/mruby/commit/b611c43a5de… | x_refsource_MISC |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| mruby | mruby/mruby |
Affected:
unspecified , < 3.2
(custom)
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CVE-2022-0240 (GCVE-0-2022-0240)
Vulnerability from cvelistv5 – Published: 2022-01-17 13:35 – Updated: 2024-08-02 23:18
VLAI
EPSS
VEX
Title
NULL Pointer Dereference in mruby/mruby
Summary
mruby is vulnerable to NULL Pointer Dereference
Severity
6.2 (Medium)
CWE
- CWE-476 - NULL Pointer Dereference
References
2 references
| URL | Tags |
|---|---|
| https://huntr.dev/bounties/5857eced-aad9-417d-864… | x_refsource_CONFIRM |
| https://github.com/mruby/mruby/commit/31fa3304049… | x_refsource_MISC |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| mruby | mruby/mruby |
Affected:
unspecified , < 3.2
(custom)
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CVE-2022-0168 (GCVE-0-2022-0168)
Vulnerability from cvelistv5 – Published: 2022-08-26 17:25 – Updated: 2024-08-02 23:18
VLAI
EPSS
VEX
Summary
A denial of service (DOS) issue was found in the Linux kernel’s smb2_ioctl_query_info function in the fs/cifs/smb2ops.c Common Internet File System (CIFS) due to an incorrect return from the memdup_user function. This flaw allows a local, privileged (CAP_SYS_ADMIN) attacker to crash the system.
Severity
No CVSS data available.
CWE
- CWE-476 - - NULL Pointer Dereference
Assigner
References
3 references
| URL | Tags |
|---|---|
| https://bugzilla.redhat.com/show_bug.cgi?id=2037386 | x_refsource_MISC |
| https://access.redhat.com/security/cve/CVE-2022-0168 | x_refsource_MISC |
| https://git.kernel.org/pub/scm/linux/kernel/git/t… | x_refsource_MISC |
Impacted products
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CVE-2021-44741 (GCVE-0-2021-44741)
Vulnerability from cvelistv5 – Published: 2022-01-14 19:05 – Updated: 2024-09-16 17:59
VLAI
EPSS
VEX
Title
Adobe Acrobat Pro DC NULL Pointer Dereference could lead to Application-denial-of-service
Summary
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Severity
CWE
- CWE-476 - NULL Pointer Dereference (CWE-476)
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://helpx.adobe.com/security/products/acrobat… | x_refsource_MISC |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Adobe | Acrobat Reader |
Affected:
unspecified , ≤ 21.007.20099
(custom)
Affected: unspecified , ≤ 20.004.30017 (custom) Affected: unspecified , ≤ 17.011.30204 (custom) Affected: unspecified , ≤ None (custom) |
Date Public
2022-01-11 00:00
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CVE-2021-44740 (GCVE-0-2021-44740)
Vulnerability from cvelistv5 – Published: 2022-01-14 19:05 – Updated: 2024-09-16 17:03
VLAI
EPSS
VEX
Title
Adobe Acrobat Pro DC NULL Pointer Dereference could lead to Application-denial-of-service
Summary
Acrobat Reader DC version 21.007.20099 (and earlier), 20.004.30017 (and earlier) and 17.011.30204 (and earlier) are affected by a Null pointer dereference vulnerability when parsing a specially crafted file. An unauthenticated attacker could leverage this vulnerability to achieve an application denial-of-service in the context of the current user. Exploitation of this issue requires user interaction in that a victim must open a malicious file.
Severity
CWE
- CWE-476 - NULL Pointer Dereference (CWE-476)
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://helpx.adobe.com/security/products/acrobat… | x_refsource_MISC |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Adobe | Acrobat Reader |
Affected:
unspecified , ≤ 21.007.20099
(custom)
Affected: unspecified , ≤ 20.004.30017 (custom) Affected: unspecified , ≤ 17.011.30204 (custom) Affected: unspecified , ≤ None (custom) |
Date Public
2022-01-11 00:00
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}
]
},
"vendor_name": "Adobe"
}
]
}
},
"data_format": "MITRE",
"data_type": "CVE",
"data_version": "4.0",
"description": {
"description_data": [
{
"lang": "eng",
"value": "Acrobat Reader DC version 21.007.20099 (and earlier), 20.004.30017 (and earlier) and 17.011.30204 (and earlier) are affected by a Null pointer dereference vulnerability when parsing a specially crafted file. An unauthenticated attacker could leverage this vulnerability to achieve an application denial-of-service in the context of the current user. Exploitation of this issue requires user interaction in that a victim must open a malicious file."
}
]
},
"impact": {
"cvss": {
"attackComplexity": "Low",
"attackVector": "Local",
"availabilityImpact": "Low",
"baseScore": 3.3,
"baseSeverity": "Low",
"confidentialityImpact": "None",
"integrityImpact": "None",
"privilegesRequired": "None",
"scope": "Unchanged",
"userInteraction": "Required",
"vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L",
"version": "3.1"
}
},
"problemtype": {
"problemtype_data": [
{
"description": [
{
"lang": "eng",
"value": "NULL Pointer Dereference (CWE-476)"
}
]
}
]
},
"references": {
"reference_data": [
{
"name": "https://helpx.adobe.com/security/products/acrobat/apsb22-01.html",
"refsource": "MISC",
"url": "https://helpx.adobe.com/security/products/acrobat/apsb22-01.html"
}
]
},
"source": {
"discovery": "EXTERNAL"
}
}
}
},
"cveMetadata": {
"assignerOrgId": "078d4453-3bcd-4900-85e6-15281da43538",
"assignerShortName": "adobe",
"cveId": "CVE-2021-44740",
"datePublished": "2022-01-14T19:05:07.378Z",
"dateReserved": "2021-12-08T00:00:00.000Z",
"dateUpdated": "2024-09-16T17:03:35.259Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.1"
}
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.