Common Weakness Enumeration
CWE-122
AllowedHeap-based Buffer Overflow
Abstraction: Variant · Status: Draft
A heap overflow condition is a buffer overflow, where the buffer that can be overwritten is allocated in the heap portion of memory, generally meaning that the buffer was allocated using a routine such as malloc().
4111 vulnerabilities reference this CWE, most recent first.
CVE-2021-3973 (GCVE-0-2021-3973)
Vulnerability from cvelistv5 – Published: 2021-11-19 11:35 – Updated: 2024-08-03 17:09
VLAI
EPSS
VEX
Title
Heap-based Buffer Overflow in vim/vim
Summary
vim is vulnerable to Heap-based Buffer Overflow
Severity
7.3 (High)
CWE
- CWE-122 - Heap-based Buffer Overflow
Assigner
References
7 references
| URL | Tags |
|---|---|
| https://huntr.dev/bounties/ce6e8609-77c6-4e17-b9f… | x_refsource_CONFIRM |
| https://github.com/vim/vim/commit/615ddd5342b50a6… | 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 |
| http://www.openwall.com/lists/oss-security/2022/01/15/1 | mailing-listx_refsource_MLIST |
| https://lists.debian.org/debian-lts-announce/2022… | mailing-listx_refsource_MLIST |
| https://security.gentoo.org/glsa/202208-32 | vendor-advisoryx_refsource_GENTOO |
Impacted products
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CVE-2021-3968 (GCVE-0-2021-3968)
Vulnerability from cvelistv5 – Published: 2021-11-19 11:40 – Updated: 2024-08-03 17:09
VLAI
EPSS
VEX
Title
Heap-based Buffer Overflow in vim/vim
Summary
vim is vulnerable to Heap-based Buffer Overflow
Severity
CWE
- CWE-122 - Heap-based Buffer Overflow
Assigner
References
6 references
| URL | Tags |
|---|---|
| https://huntr.dev/bounties/00d62924-a7b4-4a61-ba2… | x_refsource_CONFIRM |
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| http://www.openwall.com/lists/oss-security/2022/01/15/1 | mailing-listx_refsource_MLIST |
| https://security.gentoo.org/glsa/202208-32 | vendor-advisoryx_refsource_GENTOO |
Impacted products
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CVE-2021-3966 (GCVE-0-2021-3966)
Vulnerability from cvelistv5 – Published: 2023-01-11 00:00 – Updated: 2025-04-09 18:29
VLAI
EPSS
VEX
Title
Usb bluetooth device ACL read cb buffer overflow
Summary
usb device bluetooth class includes a buffer overflow related to implementation of net_buf_add_mem.
Severity
9.6 (Critical)
SSVC
Exploitation: poc
Automatable: no
Technical Impact: total
CISA Coordinator (v2.0.3)
CWE
- CWE-122 - Heap-based Buffer Overflow (CWE-122)
Assigner
References
1 reference
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| zephyrproject-rtos | zephyr |
Affected:
unspecified , ≤ v3.0
(custom)
|
Date Public
2022-02-16 00:00
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CVE-2021-3927 (GCVE-0-2021-3927)
Vulnerability from cvelistv5 – Published: 2021-11-05 00:00 – Updated: 2024-08-03 17:09
VLAI
EPSS
VEX
Title
Heap-based Buffer Overflow in vim/vim
Summary
vim is vulnerable to Heap-based Buffer Overflow
Severity
7.3 (High)
CWE
- CWE-122 - Heap-based Buffer Overflow
Assigner
References
9 references
| URL | Tags |
|---|---|
| https://huntr.dev/bounties/9c2b2c82-48bb-4be9-ab8… | |
| https://github.com/vim/vim/commit/0b5b06cb4777d14… | |
| https://lists.fedoraproject.org/archives/list/pac… | vendor-advisory |
| 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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CVE-2021-3903 (GCVE-0-2021-3903)
Vulnerability from cvelistv5 – Published: 2021-10-27 21:00 – Updated: 2024-08-03 17:09
VLAI
EPSS
VEX
Title
Heap-based Buffer Overflow in vim/vim
Summary
vim is vulnerable to Heap-based Buffer Overflow
Severity
7.3 (High)
CWE
- CWE-122 - Heap-based Buffer Overflow
Assigner
References
7 references
| URL | Tags |
|---|---|
| https://huntr.dev/bounties/35738a4f-55ce-446c-b83… | x_refsource_CONFIRM |
| https://github.com/vim/vim/commit/777e7c21b7627be… | 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://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.debian.org/debian-lts-announce/2022… | mailing-listx_refsource_MLIST |
Impacted products
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CVE-2021-3875 (GCVE-0-2021-3875)
Vulnerability from cvelistv5 – Published: 2021-10-15 13:40 – Updated: 2024-08-03 17:09
VLAI
EPSS
VEX
Title
Heap-based Buffer Overflow in vim/vim
Summary
vim is vulnerable to Heap-based Buffer Overflow
Severity
7.8 (High)
CWE
- CWE-122 - Heap-based Buffer Overflow
Assigner
References
6 references
| URL | Tags |
|---|---|
| https://huntr.dev/bounties/5cdbc168-6ba1-4bc2-ba6… | x_refsource_CONFIRM |
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CVE-2021-3872 (GCVE-0-2021-3872)
Vulnerability from cvelistv5 – Published: 2021-10-19 12:30 – Updated: 2025-11-03 20:33
VLAI
EPSS
VEX
Title
Heap-based Buffer Overflow in vim/vim
Summary
vim is vulnerable to Heap-based Buffer Overflow
Severity
7.8 (High)
CWE
- CWE-122 - Heap-based Buffer Overflow
Assigner
References
7 references
| URL | Tags |
|---|---|
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| https://lists.debian.org/debian-lts-announce/2025… |
Impacted products
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CVE-2021-3861 (GCVE-0-2021-3861)
Vulnerability from cvelistv5 – Published: 2022-02-07 22:00 – Updated: 2024-09-16 16:18
VLAI
EPSS
VEX
Title
The RNDIS USB device class includes a buffer overflow vulnerability
Summary
The RNDIS USB device class includes a buffer overflow vulnerability. Zephyr versions >= v2.6.0 contain Heap-based Buffer Overflow (CWE-122). For more information, see https://github.com/zephyrproject-rtos/zephyr/security/advisories/GHSA-hvfp-w4h8-gxvj
Severity
8.2 (High)
CWE
- CWE-122 - Heap-based Buffer Overflow (CWE-122)
Assigner
References
1 reference
| URL | Tags |
|---|---|
| http://github.com/zephyrproject-rtos/zephyr/secur… | x_refsource_MISC |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| zephyrproject-rtos | zephyr |
Affected:
v2.6.0 , < unspecified
(custom)
|
Date Public
2022-01-05 00:00
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CVE-2021-3835 (GCVE-0-2021-3835)
Vulnerability from cvelistv5 – Published: 2022-02-07 22:00 – Updated: 2024-09-17 00:15
VLAI
EPSS
VEX
Title
Buffer overflow in usb device class
Summary
Buffer overflow in usb device class. Zephyr versions >= v2.6.0 contain Heap-based Buffer Overflow (CWE-122). For more information, see https://github.com/zephyrproject-rtos/zephyr/security/advisories/GHSA-fm6v-8625-99jf
Severity
8.2 (High)
CWE
- CWE-122 - Heap-based Buffer Overflow (CWE-122)
Assigner
References
1 reference
| URL | Tags |
|---|---|
| http://github.com/zephyrproject-rtos/zephyr/secur… | x_refsource_MISC |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| zephyrproject-rtos | zephyr |
Affected:
v2.6.0 , < unspecified
(custom)
|
Date Public
2021-10-02 00:00
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CVE-2021-3778 (GCVE-0-2021-3778)
Vulnerability from cvelistv5 – Published: 2021-09-15 00:00 – Updated: 2024-08-03 17:09
VLAI
EPSS
VEX
Title
Heap-based Buffer Overflow in vim/vim
Summary
vim is vulnerable to Heap-based Buffer Overflow
Severity
7.8 (High)
CWE
- CWE-122 - Heap-based Buffer Overflow
Assigner
References
9 references
Impacted products
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Mitigation
Pre-design: Use a language or compiler that performs automatic bounds checking.
Mitigation
Architecture and Design
Use an abstraction library to abstract away risky APIs. Not a complete solution.
Mitigation MIT-10
Operation
Build and Compilation
Strategy: Environment Hardening
- Use automatic buffer overflow detection mechanisms that are offered by certain compilers or compiler extensions. Examples include: the Microsoft Visual Studio /GS flag, Fedora/Red Hat FORTIFY_SOURCE GCC flag, StackGuard, and ProPolice, which provide various mechanisms including canary-based detection and range/index checking.
- D3-SFCV (Stack Frame Canary Validation) from D3FEND [REF-1334] discusses canary-based detection in detail.
Mitigation MIT-11
Operation
Build and Compilation
Strategy: Environment Hardening
- Run or compile the software using features or extensions that randomly arrange the positions of a program's executable and libraries in memory. Because this makes the addresses unpredictable, it can prevent an attacker from reliably jumping to exploitable code.
- Examples include Address Space Layout Randomization (ASLR) [REF-58] [REF-60] and Position-Independent Executables (PIE) [REF-64]. Imported modules may be similarly realigned if their default memory addresses conflict with other modules, in a process known as "rebasing" (for Windows) and "prelinking" (for Linux) [REF-1332] using randomly generated addresses. ASLR for libraries cannot be used in conjunction with prelink since it would require relocating the libraries at run-time, defeating the whole purpose of prelinking.
- For more information on these techniques see D3-SAOR (Segment Address Offset Randomization) from D3FEND [REF-1335].
Mitigation
Implementation
Implement and perform bounds checking on input.
Mitigation
Implementation
Strategy: Libraries or Frameworks
Do not use dangerous functions such as gets. Look for their safe equivalent, which checks for the boundary.
Mitigation
Operation
Use OS-level preventative functionality. This is not a complete solution, but it provides some defense in depth.
CAPEC-92: Forced Integer Overflow
This attack forces an integer variable to go out of range. The integer variable is often used as an offset such as size of memory allocation or similarly. The attacker would typically control the value of such variable and try to get it out of range. For instance the integer in question is incremented past the maximum possible value, it may wrap to become a very small, or negative number, therefore providing a very incorrect value which can lead to unexpected behavior. At worst the attacker can execute arbitrary code.