Common Weakness Enumeration
CWE-121
AllowedStack-based Buffer Overflow
Abstraction: Variant · Status: Draft
A stack-based buffer overflow condition is a condition where the buffer being overwritten is allocated on the stack (i.e., is a local variable or, rarely, a parameter to a function).
5640 vulnerabilities reference this CWE, most recent first.
CVE-2026-22262 (GCVE-0-2026-22262)
Vulnerability from cvelistv5 – Published: 2026-01-27 18:18 – Updated: 2026-01-27 19:30
VLAI
EPSS
VEX
Title
Suricata datasets: stack overflow when saving a set
Summary
Suricata is a network IDS, IPS and NSM engine. While saving a dataset a stack buffer is used to prepare the data. Prior to versions 8.0.3 and 7.0.14, if the data in the dataset is too large, this can result in a stack overflow. Versions 8.0.3 and 7.0.14 contain a patch. As a workaround, do not use rules with datasets `save` nor `state` options.
Severity
5.9 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-01-27 19:29 UTC
CWE
- CWE-121 - Stack-based Buffer Overflow
Assigner
References
8 references
| URL | Tags |
|---|---|
| https://github.com/OISF/suricata/security/advisor… | x_refsource_CONFIRM |
| https://github.com/OISF/suricata/commit/0eff24213… | x_refsource_MISC |
| https://github.com/OISF/suricata/commit/27a2180bc… | x_refsource_MISC |
| https://github.com/OISF/suricata/commit/32609e689… | x_refsource_MISC |
| https://github.com/OISF/suricata/commit/32a1b9ae6… | x_refsource_MISC |
| https://github.com/OISF/suricata/commit/d6bc718e3… | x_refsource_MISC |
| https://github.com/OISF/suricata/commit/d767dfadc… | x_refsource_MISC |
| https://redmine.openinfosecfoundation.org/issues/8110 | x_refsource_MISC |
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CVE-2026-22214 (GCVE-0-2026-22214)
Vulnerability from cvelistv5 – Published: 2026-01-12 23:03 – Updated: 2026-07-14 15:53
VLAI
EPSS
VEX
Title
RIOT OS <= 2026.01-devel-317 Stack-Based Buffer Overflow in ethos Serial Frame Parser
Summary
RIOT OS versions up to and including 2026.01-devel-317 contain a stack-based buffer overflow vulnerability in the ethos utility due to missing bounds checking when processing incoming serial frame data. The vulnerability occurs in the _handle_char() function, where incoming frame bytes are appended to a fixed-size stack buffer without verifying that the current write index remains within bounds. An attacker capable of sending crafted serial or TCP-framed input can cause the current write index to exceed the buffer size, resulting in a write past the end of the stack buffer. This condition leads to memory corruption and application crash.
Severity
SSVC
Exploitation: poc
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-01-13 18:50 UTC
CWE
- CWE-121 - Stack-based Buffer Overflow
Assigner
References
4 references
| URL | Tags |
|---|---|
| https://seclists.org/fulldisclosure/2026/Jan/16 | technical-descriptionexploit |
| https://www.riot-os.org/ | product |
| https://github.com/RIOT-OS/RIOT | product |
| https://www.vulncheck.com/advisories/riot-os-stac… | third-party-advisory |
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CVE-2026-22213 (GCVE-0-2026-22213)
Vulnerability from cvelistv5 – Published: 2026-01-12 23:03 – Updated: 2026-07-14 15:53
VLAI
EPSS
VEX
Title
RIOT OS <= 2026.01-devel-317 Stack-Based Buffer Overflow in tapslip6 Utility
Summary
RIOT OS versions up to and including 2026.01-devel-317 contain a stack-based buffer overflow vulnerability in the tapslip6 utility. The vulnerability is caused by unsafe string concatenation in the devopen() function, which constructs a device path using unbounded user-controlled input. The utility uses strcpy() and strcat() to concatenate the fixed prefix '/dev/' with a user-supplied device name provided via the -s command-line option without bounds checking. This allows an attacker to supply an excessively long device name and overflow a fixed-size stack buffer, leading to process crashes and memory corruption.
Severity
SSVC
Exploitation: poc
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-01-13 18:37 UTC
CWE
- CWE-121 - Stack-based Buffer Overflow
Assigner
References
4 references
| URL | Tags |
|---|---|
| https://seclists.org/fulldisclosure/2026/Jan/15 | technical-descriptionexploit |
| https://www.riot-os.org/ | product |
| https://github.com/RIOT-OS/RIOT | product |
| https://www.vulncheck.com/advisories/riot-os-stac… | third-party-advisory |
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CVE-2026-22212 (GCVE-0-2026-22212)
Vulnerability from cvelistv5 – Published: 2026-01-12 23:02 – Updated: 2026-07-14 15:53
VLAI
EPSS
VEX
Title
TinyOS <= 2.1.2 Stack-Based Buffer Overflow in mcp2200gpio
Summary
TinyOS versions up to and including 2.1.2 contain a stack-based buffer overflow vulnerability in the mcp2200gpio utility. The vulnerability is caused by unsafe use of strcpy() and strcat() functions when constructing device paths during automatic device discovery. A local attacker can exploit this by creating specially crafted filenames under /dev/usb/, leading to stack memory corruption and application crashes.
Severity
SSVC
Exploitation: poc
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-01-13 19:06 UTC
CWE
- CWE-121 - Stack-based Buffer Overflow
Assigner
References
3 references
| URL | Tags |
|---|---|
| https://seclists.org/fulldisclosure/2026/Jan/14 | technical-descriptionexploit |
| https://github.com/tinyos/tinyos-main | product |
| https://www.vulncheck.com/advisories/tinyos-stack… | third-party-advisory |
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CVE-2026-22189 (GCVE-0-2026-22189)
Vulnerability from cvelistv5 – Published: 2026-01-07 20:25 – Updated: 2026-07-14 15:53
VLAI
EPSS
VEX
Title
Panda3D <= 1.10.16 egg-mkfont Stack Buffer Overflow
Summary
The egg-mkfont utility in Panda3D versions up to and including 1.10.16 contains a stack-based buffer overflow vulnerability due to use of an unbounded sprintf() call with attacker-controlled input. When constructing glyph filenames, egg-mkfont formats a user-supplied glyph pattern (-gp) into a fixed-size stack buffer without length validation. Supplying an excessively long glyph pattern string can overflow the stack buffer, resulting in memory corruption and a deterministic crash. Depending on build configuration and execution environment, the overflow may also be exploitable for arbitrary code execution.
Severity
SSVC
Exploitation: poc
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-01-07 21:21 UTC
CWE
- CWE-121 - Stack-based Buffer Overflow
Assigner
References
4 references
| URL | Tags |
|---|---|
| https://seclists.org/fulldisclosure/2026/Jan/10 | technical-descriptionexploit |
| https://www.panda3d.org/ | product |
| https://github.com/panda3d/panda3d | product |
| https://www.vulncheck.com/advisories/panda3d-egg-… | third-party-advisory |
Impacted products
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CVE-2026-21903 (GCVE-0-2026-21903)
Vulnerability from cvelistv5 – Published: 2026-01-15 20:18 – Updated: 2026-01-15 21:12
VLAI
EPSS
VEX
Title
Junos OS: Subscribing to telemetry sensors at scale causes all FPCs to crash
Summary
A Stack-based Buffer Overflow vulnerability in the Packet Forwarding Engine (pfe) of Juniper Networks Junos OS allows a network-based attacker, authenticated with low privileges to cause a Denial-of-Service (DoS).
Subscribing to telemetry sensors at scale causes all FPC connections to drop, resulting in an FPC crash and restart.
The issue was not seen when YANG packages for the specific sensors were installed.
This issue affects Junos OS:
* all versions before 22.4R3-S7,
* 23.2 version before 23.2R2-S4,
* 23.4 versions before 23.4R2.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-01-15 21:12 UTC
CWE
- CWE-121 - Stack-based Buffer Overflow
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://supportportal.juniper.net/JSA106022 | vendor-advisory |
| https://kb.juniper.net/JSA106022 | vendor-advisory |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Juniper Networks | Junos OS |
Affected:
0 , < 22.4R3-S7
(semver)
Affected: 23.2 , < 23.2R2-S4 (semver) Affected: 23.4 , < 23.4R2 (semver) |
Date Public
2026-01-14 17:00
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CVE-2026-21807 (GCVE-0-2026-21807)
Vulnerability from cvelistv5 – Published: 2026-08-26 22:02 – Updated: 2026-08-27 16:05
VLAI
EPSS
VEX
Title
HCL BigFix Quantum Risk Analyzer is affected by a stack-based buffer overflow
Summary
HCL BigFix Quantum Risk Analyzer binary lacks several critical, industry-standard hardening protections that could allow an attacker to cause a stack-based buffer overflow.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-27 16:04 UTC
CWE
- CWE-121 - Stack-based buffer overflow
Assigner
References
1 reference
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| HCLSoftware | BigFix Quantum Risk Analyzer |
Affected:
2.0.1.47
|
Date Public
2026-08-26 21:00
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CVE-2026-21224 (GCVE-0-2026-21224)
Vulnerability from cvelistv5 – Published: 2026-01-13 17:56 – Updated: 2026-07-30 20:47
VLAI
EPSS
VEX
Title
Azure Connected Machine Agent Elevation of Privilege Vulnerability
Summary
Stack-based buffer overflow in Azure Connected Machine Agent allows an authorized attacker to elevate privileges locally.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-01-13 21:44 UTC
CWE
- CWE-121 - Stack-based Buffer Overflow
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://msrc.microsoft.com/update-guide/vulnerabi… | vendor-advisorypatch |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Microsoft | Azure Connected Machine Agent |
Affected:
1.0.0 , < 1.60.03293.2680
(custom)
cpe:2.3:a:microsoft:azure_connected_machine_agent:*:*:*:*:*:*:*:* |
Date Public
2026-01-13 16:00
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CVE-2026-20509 (GCVE-0-2026-20509)
Vulnerability from cvelistv5 – Published: 2026-09-07 01:57 – Updated: 2026-09-08 03:55
VLAI
EPSS
VEX
Summary
In Power HAL, there is a possible out of bounds write due to a missing bounds check. This could lead to local escalation of privilege if a malicious actor has already obtained the System privilege. User interaction is not needed for exploitation. Patch ID: ALPS11165543; Issue ID: MSV-9011.
Severity
6.7 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-07 00:00 UTC
CWE
- CWE-121 - Stack-based Buffer Overflow
Assigner
References
1 reference
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| MediaTek, Inc. | MediaTek chipset |
Affected:
MT2718
Affected: MT6739 Affected: MT6761 Affected: MT6765 Affected: MT6768 Affected: MT6769 Affected: MT6781 Affected: MT6789 Affected: MT6833 Affected: MT6835 Affected: MT6853 Affected: MT6855 Affected: MT6858 Affected: MT6877 Affected: MT6878 Affected: MT6879 Affected: MT6881 Affected: MT6883 Affected: MT6885 Affected: MT6886 Affected: MT6889 Affected: MT6893 Affected: MT6895 Affected: MT6897 Affected: MT6899 Affected: MT6983 Affected: MT6985 Affected: MT6989 Affected: MT6991 Affected: MT6993 Affected: MT8171 Affected: MT8186 Affected: MT8188 Affected: MT8189 Affected: MT8196 Affected: MT8668 Affected: MT8676 Affected: MT8678 Affected: MT8696 Affected: MT8793 |
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CVE-2026-20345 (GCVE-0-2026-20345)
Vulnerability from cvelistv5 – Published: 2026-08-07 16:42 – Updated: 2026-08-07 21:02
VLAI
EPSS
VEX
Title
ClamAV GPT File Format Processing Memory Corruption Vulnerability
Summary
A vulnerability in the GPT file format parser of ClamAV could allow an unauthenticated, remote attacker to cause a DoS condition or possibly other expanded impacts as a result of memory corruption on an affected device.
This vulnerability is due to improper handling of an endian conversion operation, which may result in an out-of-bounds buffer write. An attacker could exploit this vulnerability by submitting a crafted GPT file to be scanned by ClamAV on an affected device. A successful exploit could allow the attacker to cause the ClamAV scanning process to terminate, resulting in a DoS condition on the affected software.
Severity
7.5 (High)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-07 20:59 UTC
CWE
- CWE-121 - Stack-based Buffer Overflow
Assigner
References
1 reference
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Cisco | Cisco Secure Endpoint |
Affected:
1.12.3
Affected: 1.8.0 Affected: 1.11.1 Affected: 1.12.4 Affected: 1.10.0 Affected: 1.12.0 Affected: 1.8.1 Affected: 1.10.1 Affected: 1.10.2 Affected: 1.12.2 Affected: 1.6.0 Affected: 1.9.0 Affected: 1.7.0 Affected: 1.12.1 Affected: 1.12.6 Affected: 1.8.4 Affected: 1.11.0 Affected: 1.9.1 Affected: 1.12.5 Affected: 2.0.2 Affected: 1.1.0 Affected: 1.14.0 Affected: 2.4.0 Affected: 1.15.2 Affected: 1.16.0 Affected: 1.21.0 Affected: 1.22.2 Affected: 1.24.5 Affected: 1.19.0 |
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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
Architecture and Design
Use an abstraction library to abstract away risky APIs. Not a complete solution.
Mitigation
Implementation
Implement and perform bounds checking on input.
Mitigation
Implementation
Do not use dangerous functions such as gets. Use safer, equivalent functions which check for boundary errors.
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].
No CAPEC attack patterns related to this CWE.