Common Weakness Enumeration
CWE-416
AllowedUse After Free
Abstraction: Variant · Status: Stable
The product reuses or references memory after it has been freed. At some point afterward, the memory may be allocated again and saved in another pointer, while the original pointer references a location somewhere within the new allocation. Any operations using the original pointer are no longer valid because the memory "belongs" to the code that operates on the new pointer.
9821 vulnerabilities reference this CWE, most recent first.
CVE-2021-20227 (GCVE-0-2021-20227)
Vulnerability from cvelistv5 – Published: 2021-03-23 00:00 – Updated: 2024-08-03 17:30
VLAI
EPSS
VEX
Summary
A flaw was found in SQLite's SELECT query functionality (src/select.c). This flaw allows an attacker who is capable of running SQL queries locally on the SQLite database to cause a denial of service or possible code execution by triggering a use-after-free. The highest threat from this vulnerability is to system availability.
Severity
No CVSS data available.
CWE
Assigner
References
8 references
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CVE-2021-20226 (GCVE-0-2021-20226)
Vulnerability from cvelistv5 – Published: 2021-02-23 16:36 – Updated: 2024-08-03 17:30
VLAI
EPSS
VEX
Summary
A use-after-free flaw was found in the io_uring in Linux kernel, where a local attacker with a user privilege could cause a denial of service problem on the system The issue results from the lack of validating the existence of an object prior to performing operations on the object by not incrementing the file reference counter while in use. The highest threat from this vulnerability is to data integrity, confidentiality and system availability.
Severity
No CVSS data available.
CWE
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://bugzilla.redhat.com/show_bug.cgi?id=1873476 | x_refsource_MISC |
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CVE-2021-4192 (GCVE-0-2021-4192)
Vulnerability from cvelistv5 – Published: 2021-12-31 00:00 – Updated: 2024-08-03 17:16
VLAI
EPSS
VEX
Title
Use After Free in vim/vim
Summary
vim is vulnerable to Use After Free
Severity
5.5 (Medium)
CWE
- CWE-416 - Use After Free
Assigner
References
13 references
Impacted products
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CVE-2021-4187 (GCVE-0-2021-4187)
Vulnerability from cvelistv5 – Published: 2021-12-29 17:10 – Updated: 2025-11-03 20:34
VLAI
EPSS
VEX
Title
Use After Free in vim/vim
Summary
vim is vulnerable to Use After Free
Severity
6.8 (Medium)
CWE
- CWE-416 - Use After Free
Assigner
References
13 references
| URL | Tags |
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| https://huntr.dev/bounties/a8bee03a-6e2e-43bf-bee… | x_refsource_CONFIRM |
| https://github.com/vim/vim/commit/4bf1006cae7e872… | x_refsource_MISC |
| https://lists.fedoraproject.org/archives/list/pac… | vendor-advisoryx_refsource_FEDORA |
| http://www.openwall.com/lists/oss-security/2022/01/15/1 | mailing-listx_refsource_MLIST |
| https://lists.fedoraproject.org/archives/list/pac… | vendor-advisoryx_refsource_FEDORA |
| https://support.apple.com/kb/HT213183 | x_refsource_CONFIRM |
| http://seclists.org/fulldisclosure/2022/Mar/29 | mailing-listx_refsource_FULLDISC |
| https://support.apple.com/kb/HT213256 | x_refsource_CONFIRM |
| http://seclists.org/fulldisclosure/2022/May/35 | mailing-listx_refsource_FULLDISC |
| https://support.apple.com/kb/HT213343 | x_refsource_CONFIRM |
| http://seclists.org/fulldisclosure/2022/Jul/14 | mailing-listx_refsource_FULLDISC |
| https://security.gentoo.org/glsa/202208-32 | vendor-advisoryx_refsource_GENTOO |
| https://lists.debian.org/debian-lts-announce/2025… |
Impacted products
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CVE-2021-4173 (GCVE-0-2021-4173)
Vulnerability from cvelistv5 – Published: 2021-12-27 12:25 – Updated: 2025-11-03 20:34
VLAI
EPSS
VEX
Title
Use After Free in vim/vim
Summary
vim is vulnerable to Use After Free
Severity
6.8 (Medium)
CWE
- CWE-416 - Use After Free
Assigner
References
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|---|---|
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| https://github.com/vim/vim/commit/9c23f9bb5fe435b… | x_refsource_MISC |
| https://lists.fedoraproject.org/archives/list/pac… | vendor-advisoryx_refsource_FEDORA |
| http://www.openwall.com/lists/oss-security/2022/01/15/1 | mailing-listx_refsource_MLIST |
| https://lists.fedoraproject.org/archives/list/pac… | vendor-advisoryx_refsource_FEDORA |
| https://support.apple.com/kb/HT213183 | x_refsource_CONFIRM |
| http://seclists.org/fulldisclosure/2022/Mar/29 | mailing-listx_refsource_FULLDISC |
| https://support.apple.com/kb/HT213256 | x_refsource_CONFIRM |
| http://seclists.org/fulldisclosure/2022/May/35 | mailing-listx_refsource_FULLDISC |
| https://support.apple.com/kb/HT213343 | x_refsource_CONFIRM |
| http://seclists.org/fulldisclosure/2022/Jul/14 | mailing-listx_refsource_FULLDISC |
| https://security.gentoo.org/glsa/202208-32 | vendor-advisoryx_refsource_GENTOO |
| https://lists.debian.org/debian-lts-announce/2025… |
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CVE-2021-4154 (GCVE-0-2021-4154)
Vulnerability from cvelistv5 – Published: 2022-02-04 22:29 – Updated: 2024-08-03 17:16
VLAI
EPSS
VEX
Summary
A use-after-free flaw was found in cgroup1_parse_param in kernel/cgroup/cgroup-v1.c in the Linux kernel's cgroup v1 parser. A local attacker with a user privilege could cause a privilege escalation by exploiting the fsconfig syscall parameter leading to a container breakout and a denial of service on the system.
Severity
No CVSS data available.
CWE
Assigner
References
4 references
| URL | Tags |
|---|---|
| https://bugzilla.redhat.com/show_bug.cgi?id=2034514 | x_refsource_MISC |
| https://git.kernel.org/pub/scm/linux/kernel/git/t… | x_refsource_MISC |
| https://cloud.google.com/anthos/clusters/docs/sec… | x_refsource_MISC |
| https://security.netapp.com/advisory/ntap-2022022… | x_refsource_CONFIRM |
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CVE-2021-4150 (GCVE-0-2021-4150)
Vulnerability from cvelistv5 – Published: 2022-03-23 19:46 – Updated: 2024-08-03 17:16
VLAI
EPSS
VEX
Summary
A use-after-free flaw was found in the add_partition in block/partitions/core.c in the Linux kernel. A local attacker with user privileges could cause a denial of service on the system. The issue results from the lack of code cleanup when device_add call fails when adding a partition to the disk.
Severity
No CVSS data available.
CWE
Assigner
References
3 references
| URL | Tags |
|---|---|
| https://bugzilla.redhat.com/show_bug.cgi?id=2025938 | x_refsource_MISC |
| https://lkml.org/lkml/2021/10/18/485 | x_refsource_MISC |
| https://lkml.org/lkml/2021/9/6/781 | x_refsource_MISC |
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CVE-2021-4083 (GCVE-0-2021-4083)
Vulnerability from cvelistv5 – Published: 2022-01-18 16:51 – Updated: 2024-08-03 17:16
VLAI
EPSS
VEX
Summary
A read-after-free memory flaw was found in the Linux kernel's garbage collection for Unix domain socket file handlers in the way users call close() and fget() simultaneously and can potentially trigger a race condition. This flaw allows a local user to crash the system or escalate their privileges on the system. This flaw affects Linux kernel versions prior to 5.16-rc4.
Severity
No CVSS data available.
CWE
Assigner
References
7 references
| URL | Tags |
|---|---|
| https://bugzilla.redhat.com/show_bug.cgi?id=2029923 | x_refsource_MISC |
| https://git.kernel.org/pub/scm/linux/kernel/git/t… | 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-5096 | vendor-advisoryx_refsource_DEBIAN |
| https://www.oracle.com/security-alerts/cpujul2022.html | x_refsource_MISC |
| https://security.netapp.com/advisory/ntap-2022021… | x_refsource_CONFIRM |
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CVE-2021-4069 (GCVE-0-2021-4069)
Vulnerability from cvelistv5 – Published: 2021-12-06 00:00 – Updated: 2024-08-03 17:16
VLAI
EPSS
VEX
Title
Use After Free in vim/vim
Summary
vim is vulnerable to Use After Free
Severity
7.3 (High)
CWE
- CWE-416 - Use After Free
Assigner
References
8 references
| URL | Tags |
|---|---|
| https://huntr.dev/bounties/0efd6d23-2259-4081-9ff… | |
| https://github.com/vim/vim/commit/e031fe90cf2e375… | |
| https://lists.fedoraproject.org/archives/list/pac… | vendor-advisory |
| https://lists.fedoraproject.org/archives/list/pac… | vendor-advisory |
| http://www.openwall.com/lists/oss-security/2022/01/15/1 | mailing-list |
| https://lists.debian.org/debian-lts-announce/2022… | mailing-list |
| https://security.gentoo.org/glsa/202208-32 | vendor-advisory |
| https://lists.debian.org/debian-lts-announce/2022… | mailing-list |
Impacted products
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"vendor": "vim",
"versions": [
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"confidentialityImpact": "LOW",
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CVE-2021-4028 (GCVE-0-2021-4028)
Vulnerability from cvelistv5 – Published: 2022-08-24 00:00 – Updated: 2024-08-03 17:16
VLAI
EPSS
VEX
Summary
A flaw in the Linux kernel's implementation of RDMA communications manager listener code allowed an attacker with local access to setup a socket to listen on a high port allowing for a list element to be used after free. Given the ability to execute code, a local attacker could leverage this use-after-free to crash the system or possibly escalate privileges on the system.
Severity
No CVSS data available.
CWE
- CWE-416 - - Use After Free
Assigner
References
6 references
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"url": "https://security.netapp.com/advisory/ntap-20221228-0002/"
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"vendor": "n/a",
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Mitigation
Architecture and Design
Strategy: Language Selection
Choose a language that provides automatic memory management.
Mitigation
Implementation
Strategy: Attack Surface Reduction
When freeing pointers, be sure to set them to NULL once they are freed. However, the utilization of multiple or complex data structures may lower the usefulness of this strategy.
No CAPEC attack patterns related to this CWE.