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().
5385 vulnerabilities reference this CWE, most recent first.
CVE-2026-81665 (GCVE-0-2026-81665)
Vulnerability from cvelistv5 – Published: 2026-09-04 09:05 – Updated: 2026-09-30 06:56- CWE-122 - Heap-based Buffer Overflow
| Vendor | Product | Version | |
|---|---|---|---|
| Red Hat | Red Hat Enterprise Linux 10 |
Unaffected:
0:3.1.10-1.el10_2.2 , < *
(rpm)
cpe:/o:redhat:enterprise_linux:10.2 |
|
| Red Hat | Red Hat Enterprise Linux 10.0 Extended Update Support |
Unaffected:
0:3.1.9-1.el10_0.3 , < *
(rpm)
cpe:/o:redhat:enterprise_linux_eus:10.0 |
|
| Red Hat | Red Hat Enterprise Linux 7 Extended Lifecycle Support |
Unaffected:
0:2.4.5-7.el7_9.4 , < *
(rpm)
cpe:/o:redhat:enterprise_linux:7::server |
|
| Red Hat | Red Hat Enterprise Linux 8 |
Unaffected:
0:3.1.8-1.el8_10.2 , < *
(rpm)
cpe:/a:redhat:enterprise_linux:8::appstream cpe:/a:redhat:enterprise_linux:8::crb cpe:/a:redhat:enterprise_linux:8::highavailability cpe:/a:redhat:enterprise_linux:8::resilientstorage |
|
| Red Hat | Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support |
Unaffected:
0:3.1.0-3.el8_4.3 , < *
(rpm)
cpe:/a:redhat:rhel_aus:8.4::appstream cpe:/a:redhat:rhel_aus:8.4::highavailability cpe:/a:redhat:rhel_eus_long_life:8.4::appstream cpe:/a:redhat:rhel_eus_long_life:8.4::highavailability cpe:/a:redhat:rhel_eus_long_life:8.4::resilientstorage |
|
| Red Hat | Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On |
Unaffected:
0:3.1.0-3.el8_4.3 , < *
(rpm)
cpe:/a:redhat:rhel_aus:8.4::appstream cpe:/a:redhat:rhel_aus:8.4::highavailability cpe:/a:redhat:rhel_eus_long_life:8.4::appstream cpe:/a:redhat:rhel_eus_long_life:8.4::highavailability cpe:/a:redhat:rhel_eus_long_life:8.4::resilientstorage |
|
| Red Hat | Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support |
Unaffected:
0:3.1.5-2.el8_6.2 , < *
(rpm)
cpe:/a:redhat:rhel_aus:8.6::appstream cpe:/a:redhat:rhel_eus_long_life:8.6::appstream cpe:/a:redhat:rhel_eus_long_life:8.6::highavailability cpe:/a:redhat:rhel_eus_long_life:8.6::resilientstorage |
|
| Red Hat | Red Hat Enterprise Linux 8.6 Extended Update Support Long-Life Add-On |
Unaffected:
0:3.1.5-2.el8_6.2 , < *
(rpm)
cpe:/a:redhat:rhel_aus:8.6::appstream cpe:/a:redhat:rhel_eus_long_life:8.6::appstream cpe:/a:redhat:rhel_eus_long_life:8.6::highavailability cpe:/a:redhat:rhel_eus_long_life:8.6::resilientstorage |
|
| Red Hat | Red Hat Enterprise Linux 8.8 Telecommunications Update Service |
Unaffected:
0:3.1.7-1.el8_8.2 , < *
(rpm)
cpe:/a:redhat:rhel_e4s:8.8::appstream cpe:/a:redhat:rhel_e4s:8.8::highavailability cpe:/a:redhat:rhel_tus:8.8::appstream cpe:/a:redhat:rhel_tus:8.8::highavailability |
|
| Red Hat | Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions |
Unaffected:
0:3.1.7-1.el8_8.2 , < *
(rpm)
cpe:/a:redhat:rhel_e4s:8.8::appstream cpe:/a:redhat:rhel_e4s:8.8::highavailability cpe:/a:redhat:rhel_tus:8.8::appstream cpe:/a:redhat:rhel_tus:8.8::highavailability |
|
| Red Hat | Red Hat Enterprise Linux 9 |
Unaffected:
0:3.1.10-1.el9_8.2 , < *
(rpm)
cpe:/a:redhat:enterprise_linux:9::appstream cpe:/a:redhat:enterprise_linux:9::crb cpe:/a:redhat:enterprise_linux:9::highavailability cpe:/a:redhat:enterprise_linux:9::resilientstorage |
|
| Red Hat | Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions |
Unaffected:
0:3.1.7-1.el9_2.2 , < *
(rpm)
cpe:/a:redhat:rhel_e4s:9.2::appstream cpe:/a:redhat:rhel_e4s:9.2::highavailability cpe:/a:redhat:rhel_e4s:9.2::resilientstorage |
|
| Red Hat | Red Hat Enterprise Linux 9.4 Update Services for SAP Solutions |
Unaffected:
0:3.1.8-1.el9_4.2 , < *
(rpm)
cpe:/a:redhat:rhel_e4s:9.4::appstream cpe:/a:redhat:rhel_e4s:9.4::highavailability cpe:/a:redhat:rhel_e4s:9.4::resilientstorage |
|
| Red Hat | Red Hat Enterprise Linux 9.6 Extended Update Support |
Unaffected:
0:3.1.9-2.el9_6.2 , < *
(rpm)
cpe:/a:redhat:rhel_eus:9.6::appstream cpe:/a:redhat:rhel_eus:9.6::crb cpe:/a:redhat:rhel_eus:9.6::highavailability cpe:/a:redhat:rhel_eus:9.6::resilientstorage |
|
| Red Hat | Red Hat OpenShift Container Platform 4 |
cpe:/a:redhat:openshift:4
|
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CVE-2026-81642 (GCVE-0-2026-81642)
Vulnerability from cvelistv5 – Published: 2026-09-16 08:30 – Updated: 2026-09-16 14:32- CWE-122 - Heap-based Buffer Overflow
| URL | Tags |
|---|---|
| https://www.nlnetlabs.nl/downloads/unbound/CVE-20… | vendor-advisory |
| Vendor | Product | Version | |
|---|---|---|---|
| NLnet Labs | Unbound |
Affected:
0 , < 1.26.1
(semver)
|
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CVE-2026-81634 (GCVE-0-2026-81634)
Vulnerability from cvelistv5 – Published: 2026-09-16 08:30 – Updated: 2026-09-16 14:32- CWE-122 - Heap-based Buffer Overflow
| URL | Tags |
|---|---|
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|---|---|---|---|
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Affected:
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CVE-2026-81477 (GCVE-0-2026-81477)
Vulnerability from cvelistv5 – Published: 2026-09-17 11:16 – Updated: 2026-09-18 03:55- CWE-122 - Heap-based Buffer Overflow
| URL | Tags |
|---|---|
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|---|---|---|---|
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Affected:
0 , < 11.1.0.3
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|
| Dell | OpenManage Server Administrator Managed Node for RHEL 8.10 |
Affected:
0 , < 11.1.0.3
(semver)
|
|
| Dell | OpenManage Server Administrator Managed Node for RHEL 9.4 |
Affected:
0 , < 11.1.0.3
(semver)
|
|
| Dell | OpenManage Server Administrator Managed Node for SLES 15 |
Affected:
0 , < 11.1.0.3
(semver)
|
|
| Dell | OpenManage Server Administrator Managed Node for Ubuntu 22.04 |
Affected:
0 , < 11.1.0.3
(semver)
|
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CVE-2026-81474 (GCVE-0-2026-81474)
Vulnerability from cvelistv5 – Published: 2026-09-17 10:43 – Updated: 2026-09-18 03:55- CWE-122 - Heap-based Buffer Overflow
| URL | Tags |
|---|---|
| https://www.dell.com/support/kbdoc/en-us/00050658… | vendor-advisory |
| Vendor | Product | Version | |
|---|---|---|---|
| Dell | OpenManage Server Administrator Managed Node (Patch) for Windows |
Affected:
0 , < 11.1.0.3
(semver)
|
|
| Dell | OpenManage Server Administrator Managed Node for RHEL 8.10 |
Affected:
0 , < 11.1.0.3
(semver)
|
|
| Dell | OpenManage Server Administrator Managed Node for RHEL 9.4 |
Affected:
0 , < 11.1.0.3
(semver)
|
|
| Dell | OpenManage Server Administrator Managed Node for SLES 15 |
Affected:
0 , < 11.1.0.3
(semver)
|
|
| Dell | OpenManage Server Administrator Managed Node for Ubuntu 22.04 |
Affected:
0 , < 11.1.0.3
(semver)
|
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CVE-2026-81398 (GCVE-0-2026-81398)
Vulnerability from cvelistv5 – Published: 2026-09-08 17:18 – Updated: 2026-09-30 15:24- CWE-122 - Heap-based Buffer Overflow
| URL | Tags |
|---|---|
| https://msrc.microsoft.com/update-guide/vulnerabi… | vendor-advisorypatch |
| Vendor | Product | Version | |
|---|---|---|---|
| Microsoft | Microsoft 365 Apps for Enterprise |
Affected:
16.0.1 , < 16.0.20326.20138
(custom)
|
|
| Microsoft | Microsoft Excel 2016 |
Affected:
16.0.0.0 , < 16.0.5569.1003
(custom)
|
|
| Microsoft | Microsoft Office 2016 |
Affected:
16.0.0 , < 16.0.5569.1003
(custom)
|
|
| Microsoft | Microsoft Office 2019 |
Affected:
19.0.0 , < 16.0.10417.20207
(custom)
|
|
| Microsoft | Microsoft Office 365 for Mac |
Affected:
1.0.0 , < 16.113.26091433
(custom)
|
|
| Microsoft | Microsoft Office LTSC 2021 |
Affected:
16.0.1 , < 16.0.14334.20906
(custom)
|
|
| Microsoft | Microsoft Office LTSC 2024 |
Affected:
16.0.0 , < 16.0.17932.20976
(custom)
|
|
| Microsoft | Microsoft Office LTSC for Mac 2021 |
Affected:
16.0.1 , < 16.113.26091433
(custom)
|
|
| Microsoft | Microsoft Office LTSC for Mac 2024 |
Affected:
16.0.0 , < 16.113.26091433
(custom)
|
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CVE-2026-81397 (GCVE-0-2026-81397)
Vulnerability from cvelistv5 – Published: 2026-09-08 17:18 – Updated: 2026-09-30 15:24- CWE-122 - Heap-based Buffer Overflow
| URL | Tags |
|---|---|
| https://msrc.microsoft.com/update-guide/vulnerabi… | vendor-advisorypatch |
| Vendor | Product | Version | |
|---|---|---|---|
| Microsoft | Microsoft 365 Apps for Enterprise |
Affected:
16.0.1 , < 16.0.20326.20138
(custom)
|
|
| Microsoft | Microsoft Excel 2016 |
Affected:
16.0.0.0 , < 16.0.5569.1003
(custom)
|
|
| Microsoft | Microsoft Office 2016 |
Affected:
16.0.0 , < 16.0.5569.1003
(custom)
|
|
| Microsoft | Microsoft Office 2019 |
Affected:
19.0.0 , < 16.0.10417.20207
(custom)
|
|
| Microsoft | Microsoft Office 365 for Mac |
Affected:
1.0.0 , < 16.113.26091433
(custom)
|
|
| Microsoft | Microsoft Office LTSC 2021 |
Affected:
16.0.1 , < 16.0.14334.20906
(custom)
|
|
| Microsoft | Microsoft Office LTSC 2024 |
Affected:
16.0.0 , < 16.0.17932.20976
(custom)
|
|
| Microsoft | Microsoft Office LTSC for Mac 2021 |
Affected:
16.0.1 , < 16.113.26091433
(custom)
|
|
| Microsoft | Microsoft Office LTSC for Mac 2024 |
Affected:
16.0.0 , < 16.113.26091433
(custom)
|
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CVE-2026-81389 (GCVE-0-2026-81389)
Vulnerability from cvelistv5 – Published: 2026-09-08 17:19 – Updated: 2026-09-30 15:24- CWE-122 - Heap-based Buffer Overflow
| URL | Tags |
|---|---|
| https://msrc.microsoft.com/update-guide/vulnerabi… | vendor-advisorypatch |
| Vendor | Product | Version | |
|---|---|---|---|
| Microsoft | Microsoft 365 Apps for Enterprise |
Affected:
16.0.1 , < 16.0.20326.20138
(custom)
|
|
| Microsoft | Microsoft Excel 2016 |
Affected:
16.0.0.0 , < 16.0.5569.1003
(custom)
|
|
| Microsoft | Microsoft Office 2016 |
Affected:
16.0.0 , < 16.0.5569.1003
(custom)
|
|
| Microsoft | Microsoft Office 2019 |
Affected:
19.0.0 , < 16.0.10417.20207
(custom)
|
|
| Microsoft | Microsoft Office 365 for Mac |
Affected:
1.0.0 , < 16.113.26091433
(custom)
|
|
| Microsoft | Microsoft Office LTSC 2021 |
Affected:
16.0.1 , < 16.0.14334.20906
(custom)
|
|
| Microsoft | Microsoft Office LTSC 2024 |
Affected:
16.0.0 , < 16.0.17932.20976
(custom)
|
|
| Microsoft | Microsoft Office LTSC for Mac 2021 |
Affected:
16.0.1 , < 16.113.26091433
(custom)
|
|
| Microsoft | Microsoft Office LTSC for Mac 2024 |
Affected:
16.0.0 , < 16.113.26091433
(custom)
|
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CVE-2026-81386 (GCVE-0-2026-81386)
Vulnerability from cvelistv5 – Published: 2026-09-08 17:18 – Updated: 2026-09-30 15:24- CWE-122 - Heap-based Buffer Overflow
| URL | Tags |
|---|---|
| https://msrc.microsoft.com/update-guide/vulnerabi… | vendor-advisorypatch |
| Vendor | Product | Version | |
|---|---|---|---|
| Microsoft | Microsoft 365 Apps for Enterprise |
Affected:
16.0.1 , < 16.0.20326.20138
(custom)
|
|
| Microsoft | Microsoft Excel 2016 |
Affected:
16.0.0.0 , < 16.0.5569.1003
(custom)
|
|
| Microsoft | Microsoft Office 2016 |
Affected:
16.0.0 , < 16.0.5569.1003
(custom)
|
|
| Microsoft | Microsoft Office 2019 |
Affected:
19.0.0 , < 16.0.10417.20207
(custom)
|
|
| Microsoft | Microsoft Office 365 for Mac |
Affected:
1.0.0 , < 16.113.26091433
(custom)
|
|
| Microsoft | Microsoft Office LTSC 2021 |
Affected:
16.0.1 , < 16.0.14334.20906
(custom)
|
|
| Microsoft | Microsoft Office LTSC 2024 |
Affected:
16.0.0 , < 16.0.17932.20976
(custom)
|
|
| Microsoft | Microsoft Office LTSC for Mac 2021 |
Affected:
16.0.1 , < 16.113.26091433
(custom)
|
|
| Microsoft | Microsoft Office LTSC for Mac 2024 |
Affected:
16.0.0 , < 16.113.26091433
(custom)
|
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CVE-2026-81355 (GCVE-0-2026-81355)
Vulnerability from cvelistv5 – Published: 2026-09-08 17:13 – Updated: 2026-09-30 15:19- CWE-122 - Heap-based Buffer Overflow
| URL | Tags |
|---|---|
| https://msrc.microsoft.com/update-guide/vulnerabi… | vendor-advisorypatch |
| Vendor | Product | Version | |
|---|---|---|---|
| Microsoft | Windows 10 Version 1607 |
Affected:
10.0.14393.0 , < 10.0.14393.9512
(custom)
|
|
| Microsoft | Windows 10 Version 1809 |
Affected:
10.0.17763.0 , < 10.0.17763.9245
(custom)
|
|
| Microsoft | Windows 10 Version 21H2 |
Affected:
10.0.19044.0 , < 10.0.19044.7725
(custom)
|
|
| Microsoft | Windows 10 Version 22H2 |
Affected:
10.0.19045.0 , < 10.0.19045.7725
(custom)
|
|
| Microsoft | Windows 11 version 23H2 |
Affected:
10.0.22631.0 , < 10.0.22631.7582
(custom)
|
|
| Microsoft | Windows 11 Version 23H2 |
Affected:
10.0.22631.0 , < 10.0.22631.7582
(custom)
|
|
| Microsoft | Windows 11 Version 24H2 |
Affected:
10.0.26100.0 , < 10.0.26100.9445
(custom)
|
|
| Microsoft | Windows 11 Version 25H2 |
Affected:
10.0.26200.0 , < 10.0.26200.9445
(custom)
|
|
| Microsoft | Windows 11 version 26H1 |
Affected:
10.0.28000.0 , < 10.0.28000.2954
(custom)
|
|
| Microsoft | Windows Server 2012 |
Affected:
6.2.9200.0 , < 6.2.9200.26349
(custom)
|
|
| Microsoft | Windows Server 2012 (Server Core installation) |
Affected:
6.2.9200.0 , < 6.2.9200.26349
(custom)
|
|
| Microsoft | Windows Server 2012 R2 |
Affected:
6.3.9600.0 , < 6.3.9600.23398
(custom)
|
|
| Microsoft | Windows Server 2012 R2 (Server Core installation) |
Affected:
6.3.9600.0 , < 6.3.9600.23398
(custom)
|
|
| Microsoft | Windows Server 2016 |
Affected:
10.0.14393.0 , < 10.0.14393.9512
(custom)
|
|
| Microsoft | Windows Server 2016 (Server Core installation) |
Affected:
10.0.14393.0 , < 10.0.14393.9512
(custom)
|
|
| Microsoft | Windows Server 2019 |
Affected:
10.0.17763.0 , < 10.0.17763.9245
(custom)
|
|
| Microsoft | Windows Server 2019 (Server Core installation) |
Affected:
10.0.17763.0 , < 10.0.17763.9245
(custom)
|
|
| Microsoft | Windows Server 2022 |
Affected:
10.0.20348.0 , < 10.0.20348.5622
(custom)
|
|
| Microsoft | Windows Server 2025 |
Affected:
10.0.26100.0 , < 10.0.26100.33438
(custom)
|
|
| Microsoft | Windows Server 2025 (Server Core installation) |
Affected:
10.0.26100.0 , < 10.0.26100.33438
(custom)
|
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"datePublic": "2026-09-08T14:00:00.000Z",
"descriptions": [
{
"lang": "en-US",
"value": "Heap-based buffer overflow in Virtual Hard Disk (VHD) Miniport Driver allows an authorized attacker to execute code locally."
}
],
"metrics": [
{
"cvssV3_1": {
"baseScore": 7.5,
"baseSeverity": "HIGH",
"vectorString": "CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:H/E:U/RL:O/RC:C",
"version": "3.1"
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"description": "CWE-122: Heap-based Buffer Overflow",
"lang": "en-US",
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"providerMetadata": {
"dateUpdated": "2026-09-30T15:19:47.946Z",
"orgId": "f38d906d-7342-40ea-92c1-6c4a2c6478c8",
"shortName": "microsoft"
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"references": [
{
"name": "Virtual Hard Disk (VHD) Miniport Driver Remote Code Execution Vulnerability",
"tags": [
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"patch"
],
"url": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-81355"
}
],
"title": "Virtual Hard Disk (VHD) Miniport Driver Remote Code Execution Vulnerability"
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"datePublished": "2026-09-08T17:13:55.969Z",
"dateReserved": "2026-08-26T18:40:19.856Z",
"dateUpdated": "2026-09-30T15:19:47.946Z",
"state": "PUBLISHED"
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Mitigation
Pre-design: Use a language or compiler that performs automatic bounds checking.
Mitigation
Use an abstraction library to abstract away risky APIs. Not a complete solution.
Mitigation MIT-10
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
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
Implement and perform bounds checking on input.
Mitigation
Strategy: Libraries or Frameworks
Do not use dangerous functions such as gets. Look for their safe equivalent, which checks for the boundary.
Mitigation
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.