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().
5392 vulnerabilities reference this CWE, most recent first.
CVE-2026-20502 (GCVE-0-2026-20502)
Vulnerability from cvelistv5 – Published: 2026-09-07 01:57 – Updated: 2026-09-08 03:55
VLAI
EPSS
VEX
Summary
In vdec, there is a possible out of bounds write due to a missing bounds check. This could lead to local escalation of privilege with no additional execution privileges needed. User interaction is not needed for exploitation. Patch ID: ALPS11262030; Issue ID: MSV-9196.
Severity
8.4 (High)
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-122 - Heap-based Buffer Overflow
Assigner
References
1 reference
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| MediaTek, Inc. | MediaTek chipset |
Affected:
MT2718
Affected: MT6580 Affected: MT6739 Affected: MT6761 Affected: MT6765 Affected: MT6768 Affected: MT6769 Affected: MT6779 Affected: MT6781 Affected: MT6785 Affected: MT6789 Affected: MT6833 Affected: MT6835 Affected: MT6853 Affected: MT6855 Affected: MT6858 Affected: MT6873 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: MT8126 Affected: MT8171 Affected: MT8186 Affected: MT8188 Affected: MT8189 Affected: MT8195 Affected: MT8196 Affected: MT8367 Affected: MT8391 Affected: MT8395 Affected: MT8668 Affected: MT8676 Affected: MT8678 Affected: MT8696 Affected: MT8781 Affected: MT8788E Affected: MT8792 Affected: MT8799 Affected: MT8910 |
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{
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{
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{
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"version": "MT6855"
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{
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"status": "affected",
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},
{
"status": "affected",
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},
{
"status": "affected",
"version": "MT6879"
},
{
"status": "affected",
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},
{
"status": "affected",
"version": "MT6883"
},
{
"status": "affected",
"version": "MT6885"
},
{
"status": "affected",
"version": "MT6886"
},
{
"status": "affected",
"version": "MT6889"
},
{
"status": "affected",
"version": "MT6893"
},
{
"status": "affected",
"version": "MT6895"
},
{
"status": "affected",
"version": "MT6897"
},
{
"status": "affected",
"version": "MT6899"
},
{
"status": "affected",
"version": "MT6983"
},
{
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},
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"status": "affected",
"version": "MT6989"
},
{
"status": "affected",
"version": "MT6991"
},
{
"status": "affected",
"version": "MT6993"
},
{
"status": "affected",
"version": "MT8126"
},
{
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"version": "MT8171"
},
{
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"version": "MT8186"
},
{
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},
{
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},
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"status": "affected",
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},
{
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},
{
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"version": "MT8367"
},
{
"status": "affected",
"version": "MT8391"
},
{
"status": "affected",
"version": "MT8395"
},
{
"status": "affected",
"version": "MT8668"
},
{
"status": "affected",
"version": "MT8676"
},
{
"status": "affected",
"version": "MT8678"
},
{
"status": "affected",
"version": "MT8696"
},
{
"status": "affected",
"version": "MT8781"
},
{
"status": "affected",
"version": "MT8788E"
},
{
"status": "affected",
"version": "MT8792"
},
{
"status": "affected",
"version": "MT8799"
},
{
"status": "affected",
"version": "MT8910"
}
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CVE-2026-20501 (GCVE-0-2026-20501)
Vulnerability from cvelistv5 – Published: 2026-09-07 01:57 – Updated: 2026-09-08 03:55
VLAI
EPSS
VEX
Summary
In vdec, there is a possible out of bounds write due to a heap buffer overflow. This could lead to local escalation of privilege with no additional execution privileges needed. User interaction is not needed for exploitation. Patch ID: ALPS11262030; Issue ID: MSV-9197.
Severity
8.4 (High)
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-122 - Heap-based Buffer Overflow
Assigner
References
1 reference
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| MediaTek, Inc. | MediaTek chipset |
Affected:
MT2718
Affected: MT6580 Affected: MT6739 Affected: MT6761 Affected: MT6765 Affected: MT6768 Affected: MT6769 Affected: MT6779 Affected: MT6781 Affected: MT6785 Affected: MT6789 Affected: MT6833 Affected: MT6835 Affected: MT6853 Affected: MT6855 Affected: MT6858 Affected: MT6873 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: MT8126 Affected: MT8171 Affected: MT8186 Affected: MT8188 Affected: MT8189 Affected: MT8195 Affected: MT8196 Affected: MT8367 Affected: MT8391 Affected: MT8395 Affected: MT8668 Affected: MT8676 Affected: MT8678 Affected: MT8696 Affected: MT8781 Affected: MT8788E Affected: MT8792 Affected: MT8799 Affected: MT8910 |
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"status": "affected",
"version": "MT6761"
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"status": "affected",
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"status": "affected",
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"status": "affected",
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"status": "affected",
"version": "MT6878"
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"status": "affected",
"version": "MT6879"
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"status": "affected",
"version": "MT6881"
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{
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"version": "MT6883"
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"status": "affected",
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"status": "affected",
"version": "MT6886"
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"status": "affected",
"version": "MT6889"
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{
"status": "affected",
"version": "MT6893"
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"status": "affected",
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{
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{
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"status": "affected",
"version": "MT8196"
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{
"status": "affected",
"version": "MT8367"
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{
"status": "affected",
"version": "MT8391"
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{
"status": "affected",
"version": "MT8395"
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{
"status": "affected",
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"status": "affected",
"version": "MT8676"
},
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"status": "affected",
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},
{
"status": "affected",
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"status": "affected",
"version": "MT8792"
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CVE-2026-20480 (GCVE-0-2026-20480)
Vulnerability from cvelistv5 – Published: 2026-08-03 02:05 – Updated: 2026-08-03 19:02
VLAI
EPSS
VEX
Summary
In Audio HAL, there is a possible out of bounds write due to a heap buffer overflow. This could lead to local denial of service with User execution privileges needed. User interaction is not needed for exploitation. Patch ID: ALPS10960023 (Note: For MT6880, MT6890, MT6980D, MT6988, MT6990) / AUTO00851189 (Note: For MT2735, MT3737); Issue ID: MSV-7586.
Severity
5.5 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-03 19:01 UTC
CWE
- CWE-122 - Heap-based Buffer Overflow
Assigner
References
1 reference
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| MediaTek, Inc. | MediaTek chipset |
Affected:
MT2735
Affected: MT2737 Affected: MT6880 Affected: MT6890 Affected: MT6980D Affected: MT6988 Affected: MT6990 |
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CVE-2026-20465 (GCVE-0-2026-20465)
Vulnerability from cvelistv5 – Published: 2026-08-03 02:05 – Updated: 2026-08-05 03:56
VLAI
EPSS
VEX
Summary
In wlan AP driver, there is a possible out of bounds write due to a missing bounds check. This could lead to remote (proximal/adjacent) escalation of privilege with no additional execution privileges needed. User interaction is not needed for exploitation. Patch ID: WCNCR00489200; Issue ID: MSV-7834.
Severity
8.1 (High)
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-04 00:00 UTC
CWE
- CWE-122 - Heap-based Buffer Overflow
Assigner
References
1 reference
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| MediaTek, Inc. | MediaTek chipset |
Affected:
MT6890
Affected: MT7915 Affected: MT7916 Affected: MT7981 Affected: MT7986 |
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CVE-2026-20462 (GCVE-0-2026-20462)
Vulnerability from cvelistv5 – Published: 2026-07-01 03:14 – Updated: 2026-07-02 03:55
VLAI
EPSS
VEX
Summary
In Telephony, there is a possible memory corruption due to a heap buffer overflow. 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: ALPS11006447; Issue ID: MSV-7871.
Severity
6.7 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-07-01 00:00 UTC
CWE
- CWE-122 - Heap Overflow
Assigner
References
1 reference
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| MediaTek, Inc. | MediaTek chipset |
Affected:
MT6739
Affected: MT6761 Affected: MT6765 Affected: MT6768 Affected: MT6781 Affected: MT6789 Affected: MT6833 Affected: MT6853 Affected: MT6855 Affected: MT6877 Affected: MT6883 Affected: MT6885 Affected: MT6889 Affected: MT6893 Affected: MT8695 Affected: MT8696 Affected: MT8765 Affected: MT8766 Affected: MT8766R Affected: MT8768 Affected: MT8781 Affected: MT8791 |
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CVE-2026-20452 (GCVE-0-2026-20452)
Vulnerability from cvelistv5 – Published: 2026-06-01 03:20 – Updated: 2026-06-02 03:55
VLAI
EPSS
VEX
Summary
In wlan AP driver, there is a possible memory corruption due to a heap buffer overflow. This could lead to remote (proximal/adjacent) code execution with User execution privileges needed. User interaction is not needed for exploitation. Patch ID: WCNCR00480138; Issue ID: MSV-6295.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-06-01 00:00 UTC
CWE
- CWE-122 - Heap Overflow
Assigner
References
1 reference
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| MediaTek, Inc. | MediaTek chipset |
Affected:
MT6890
Affected: MT7615 Affected: MT7915 Affected: MT7916 Affected: MT7981 Affected: MT7986 Affected: MT7990 Affected: MT7992 Affected: MT7993 |
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CVE-2026-20408 (GCVE-0-2026-20408)
Vulnerability from cvelistv5 – Published: 2026-02-02 08:14 – Updated: 2026-03-30 13:02
VLAI
EPSS
VEX
Summary
In wlan, there is a possible out of bounds write due to a heap buffer overflow. This could lead to remote (proximal/adjacent) escalation of privilege with no additional execution privileges needed. User interaction is not needed for exploitation. Patch ID: WCNCR00461651; Issue ID: MSV-4758.
Severity
8.8 (High)
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-02-03 04:55 UTC
CWE
- CWE-122 - Heap Overflow
Assigner
References
1 reference
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| MediaTek, Inc. | MediaTek chipset |
Affected:
MT6890
Affected: MT7615 Affected: MT7915 Affected: MT7916 Affected: MT7981 Affected: MT7986 |
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GCVE-1-2026-20208
Vulnerability from gna-1 – Published: 2026-08-24 09:14 – Updated: 2026-08-24 10:23
VLAI
EPSS
VEX
Title
Switch RG-ES208GC - Reyee - Ruijie equipments
Summary
Heap-based Buffer Overflow vulnerability in Ruijie Reyee RG-ES208GC (at least) allows Overflow Buffers.This issue affects at least RG-ES208GC - Reyee - Ruijie equipments.
Discovered on a honeypot operated by CIRCL.
Severity
CWE
- CWE-122 - Heap-based Buffer Overflow
References
1 reference
| URL | Tags |
|---|---|
| https://reyee.ruijie.com/en-global/products/reyee… | product |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Ruijie | Reyee RG-ES208GC |
Unknown:
0 , ≤ 999999
(semver)
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CVE-2026-20185 (GCVE-0-2026-20185)
Vulnerability from cvelistv5 – Published: 2026-05-06 16:15 – Updated: 2026-05-06 17:48
VLAI
EPSS
VEX
Title
Cisco SG350 and SG350X Series Managed Switches SNMP Denial of Service Vunerability
Summary
A vulnerability in the Simple Network Management Protocol (SNMP) subsystem of Cisco 350 Series Managed Switches (SG350) and Cisco 350X Series Stackable Managed Switches (SG350X) firmware could allow an authenticated, remote attacker to cause a denial of service (DoS) condition on an affected device.
This vulnerability is due to improper error handling when parsing response data for a specific SNMP request. An attacker could exploit this vulnerability by sending a specific SNMP request to an affected device. A successful exploit could allow the attacker to cause the device to reload unexpectedly, resulting in a DoS condition.
This vulnerability affects SNMP versions 1, 2c, and 3. To exploit this vulnerability through SNMPv2c or earlier, the attacker must know a valid read-write or read-only SNMP community string for the affected system. To exploit this vulnerability through SNMPv3, the attacker must have valid SNMP user credentials for the affected system.
Severity
7.7 (High)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-05-06 17:36 UTC
CWE
- CWE-122 - Heap-based Buffer Overflow
Assigner
References
1 reference
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Cisco | Cisco Small Business Smart and Managed Switches |
Affected:
2.5.9.54
Affected: 2.5.9.55 |
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CVE-2026-20053 (GCVE-0-2026-20053)
Vulnerability from cvelistv5 – Published: 2026-03-04 17:46 – Updated: 2026-03-04 21:25
VLAI
EPSS
VEX
Title
Cisco Secure Firewall Threat Defense Software Snort 3 Visual Basic for Application Heap Overflow Denial of Service Vulnerability
Summary
Multiple Cisco products are affected by a vulnerability in the Snort 3 VBA feature that could allow an unauthenticated, remote attacker to cause the Snort 3 Detection Engine to crash.
This vulnerability is due to improper range checking when decompressing VBA data, which is user controlled. An attacker could exploit this vulnerability by sending crafted VBA data to the Snort 3 Detection Engine on the targeted device. A successful exploit could allow the attacker to cause an overflow of heap data, which could cause a DoS condition.
Severity
5.8 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-03-04 21:24 UTC
CWE
- CWE-122 - Heap-based Buffer Overflow
Assigner
References
1 reference
Impacted products
3 products
| Vendor | Product | Version | |
|---|---|---|---|
| Cisco | Cisco Cyber Vision |
Affected:
3.0.0
Affected: 3.0.2 Affected: 3.0.3 Affected: 3.0.1 Affected: 3.1.0 Affected: 3.0.4 Affected: 3.1.1 Affected: 3.1.2 Affected: 3.2.0 Affected: 3.0.5 Affected: 3.2.1 Affected: 3.0.6 Affected: 3.2.2 Affected: 3.2.3 Affected: 3.2.4 Affected: 4.0.0 Affected: 4.0.1 Affected: 4.0.2 Affected: 4.0.3 Affected: 4.1.0 Affected: 4.1.1 Affected: 4.1.2 Affected: 4.1.3 Affected: 4.1.4 Affected: 4.2.0 Affected: 4.2.1 Affected: 4.1.5 Affected: 4.2.2 Affected: 4.2.X Affected: 4.2.3 Affected: 4.2.4 Affected: 4.2.6 Affected: 4.1.6 Affected: 4.3.0 Affected: 4.3.1 Affected: 4.3.2 Affected: 4.3.3 Affected: 4.4.0 Affected: 4.4.1 Affected: 4.4.2 Affected: 4.4.3 Affected: 4.1.7 Affected: 5.0.0 Affected: 5.0.1 Affected: 5.0.2 Affected: 5.1.0 Affected: 5.1.1 Affected: 5.1.2 Affected: 5.1.3 Affected: 5.2.0 Affected: 5.2.1 Affected: 5.3.0 Affected: 5.3.1 Affected: 5.3.2 |
|
| Cisco | Cisco Secure Firewall Threat Defense (FTD) Software |
Affected:
7.2.0
Affected: 7.2.0.1 Affected: 7.2.1 Affected: 7.3.0 Affected: 7.2.2 Affected: 7.2.3 Affected: 7.3.1 Affected: 7.2.4 Affected: 7.2.5 Affected: 7.2.4.1 Affected: 7.3.1.1 Affected: 7.4.0 Affected: 7.2.5.1 Affected: 7.4.1 Affected: 7.2.6 Affected: 7.4.1.1 Affected: 7.2.7 Affected: 7.2.5.2 Affected: 7.3.1.2 Affected: 7.2.8 Affected: 7.6.0 Affected: 7.4.2 Affected: 7.2.8.1 Affected: 7.4.2.1 Affected: 7.2.9 Affected: 7.7.0 Affected: 7.4.2.2 Affected: 7.2.10 Affected: 7.6.1 Affected: 7.4.2.3 Affected: 7.6.2 Affected: 7.7.10 Affected: 7.6.2.1 Affected: 7.7.10.1 Affected: 7.4.2.4 Affected: 7.2.10.2 Affected: 7.4.3 |
|
| Cisco | Cisco UTD SNORT IPS Engine Software |
Affected:
17.12.1a
Affected: 17.9.4 Affected: 17.12.2 Affected: 17.13.1a Affected: 17.12.3 Affected: 17.14.1a Affected: 17.12.4 Affected: 17.12.3a Affected: 17.15.1a Affected: 17.16.1a Affected: 17.9.5e Affected: 17.12.4a Affected: 17.15.2c Affected: 17.12.4b Affected: 17.15.2a Affected: 17.12.5 Affected: 17.17.1 Affected: 17.12.5a Affected: 17.15.3a Affected: 17.15.3 Affected: 17.12.5b Affected: 17.12.5c Affected: 17.15.4 Affected: 17.18.1 Affected: 17.18.1a Affected: 17.12.6 Affected: 17.15.4c Affected: 17.12.5d Affected: 17.18.2 |
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"version": "7.2.5.1"
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"status": "affected",
"version": "7.2.6"
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"version": "7.4.1.1"
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"version": "7.2.7"
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"version": "7.2.5.2"
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"version": "7.3.1.2"
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"version": "7.2.8"
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"version": "7.6.0"
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"version": "7.4.2"
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"version": "7.2.8.1"
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"status": "affected",
"version": "7.4.2.4"
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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.