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().
4096 vulnerabilities reference this CWE, most recent first.
GHSA-4CMC-MJVG-X5MP
Vulnerability from github – Published: 2025-03-11 21:30 – Updated: 2025-03-11 21:30
VLAI
Details
Substance3D - Modeler versions 1.15.0 and earlier are affected by a Heap-based Buffer Overflow vulnerability that could result in arbitrary code execution in the context of the current user. Exploitation of this issue requires user interaction in that a victim must open a malicious file.
Severity
7.8 (High)
{
"affected": [],
"aliases": [
"CVE-2025-27173"
],
"database_specific": {
"cwe_ids": [
"CWE-122"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2025-03-11T21:15:42Z",
"severity": "HIGH"
},
"details": "Substance3D - Modeler versions 1.15.0 and earlier are affected by a Heap-based Buffer Overflow vulnerability that could result in arbitrary code execution in the context of the current user. Exploitation of this issue requires user interaction in that a victim must open a malicious file.",
"id": "GHSA-4cmc-mjvg-x5mp",
"modified": "2025-03-11T21:30:38Z",
"published": "2025-03-11T21:30:38Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2025-27173"
},
{
"type": "WEB",
"url": "https://helpx.adobe.com/security/products/substance3d-modeler/apsb25-21.html"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H",
"type": "CVSS_V3"
}
]
}
GHSA-4CVV-4V6H-5HQ7
Vulnerability from github – Published: 2024-06-11 18:30 – Updated: 2024-06-11 18:30
VLAI
Details
Windows Link Layer Topology Discovery Protocol Remote Code Execution Vulnerability
Severity
8.0 (High)
{
"affected": [],
"aliases": [
"CVE-2024-30075"
],
"database_specific": {
"cwe_ids": [
"CWE-122"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2024-06-11T17:15:54Z",
"severity": "HIGH"
},
"details": "Windows Link Layer Topology Discovery Protocol Remote Code Execution Vulnerability",
"id": "GHSA-4cvv-4v6h-5hq7",
"modified": "2024-06-11T18:30:49Z",
"published": "2024-06-11T18:30:49Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2024-30075"
},
{
"type": "WEB",
"url": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2024-30075"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:A/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H",
"type": "CVSS_V3"
}
]
}
GHSA-4F5C-477M-3P63
Vulnerability from github – Published: 2023-03-04 00:30 – Updated: 2023-03-10 15:30
VLAI
Details
Heap-based Buffer Overflow in GitHub repository vim/vim prior to 9.0.1376.
Severity
7.8 (High)
{
"affected": [],
"aliases": [
"CVE-2023-1170"
],
"database_specific": {
"cwe_ids": [
"CWE-122"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2023-03-03T23:15:00Z",
"severity": "HIGH"
},
"details": "Heap-based Buffer Overflow in GitHub repository vim/vim prior to 9.0.1376.",
"id": "GHSA-4f5c-477m-3p63",
"modified": "2023-03-10T15:30:42Z",
"published": "2023-03-04T00:30:16Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2023-1170"
},
{
"type": "WEB",
"url": "https://github.com/vim/vim/commit/1c73b65229c25e3c1fd8824ba958f7cc4d604f9c"
},
{
"type": "WEB",
"url": "https://huntr.dev/bounties/286e0090-e654-46d2-ac60-29f81799d0a4"
},
{
"type": "WEB",
"url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/DIAKPMKJ4OZ6NYRZJO7YWMNQL2BICLYV"
},
{
"type": "WEB",
"url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/IE44W6WMMREYCW3GJHPSYP7NK2VT5NY6"
},
{
"type": "WEB",
"url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/X4KDAU76Z7QNSPKZX2JAJ6O7KIEOXWTL"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H",
"type": "CVSS_V3"
}
]
}
GHSA-4FCP-CCXJ-VF2H
Vulnerability from github – Published: 2025-02-11 18:31 – Updated: 2025-02-11 18:31
VLAI
Details
Windows Telephony Service Remote Code Execution Vulnerability
Severity
8.8 (High)
{
"affected": [],
"aliases": [
"CVE-2025-21200"
],
"database_specific": {
"cwe_ids": [
"CWE-122"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2025-02-11T18:15:31Z",
"severity": "HIGH"
},
"details": "Windows Telephony Service Remote Code Execution Vulnerability",
"id": "GHSA-4fcp-ccxj-vf2h",
"modified": "2025-02-11T18:31:36Z",
"published": "2025-02-11T18:31:36Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2025-21200"
},
{
"type": "WEB",
"url": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-21200"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H",
"type": "CVSS_V3"
}
]
}
GHSA-4FJX-J6JJ-8PM5
Vulnerability from github – Published: 2022-09-07 00:01 – Updated: 2022-09-10 00:00
VLAI
Details
A heap-based buffer overflow flaw was found in the Fribidi package and affects the fribidi_cap_rtl_to_unicode() function of the fribidi-char-sets-cap-rtl.c file. This flaw allows an attacker to pass a specially crafted file to the Fribidi application with the '--caprtl' option, leading to a crash and causing a denial of service.
Severity
5.5 (Medium)
{
"affected": [],
"aliases": [
"CVE-2022-25309"
],
"database_specific": {
"cwe_ids": [
"CWE-122",
"CWE-787"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2022-09-06T18:15:00Z",
"severity": "MODERATE"
},
"details": "A heap-based buffer overflow flaw was found in the Fribidi package and affects the fribidi_cap_rtl_to_unicode() function of the fribidi-char-sets-cap-rtl.c file. This flaw allows an attacker to pass a specially crafted file to the Fribidi application with the \u0027--caprtl\u0027 option, leading to a crash and causing a denial of service.",
"id": "GHSA-4fjx-j6jj-8pm5",
"modified": "2022-09-10T00:00:30Z",
"published": "2022-09-07T00:01:53Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2022-25309"
},
{
"type": "WEB",
"url": "https://github.com/fribidi/fribidi/issues/182"
},
{
"type": "WEB",
"url": "https://github.com/fribidi/fribidi/commit/f22593b82b5d1668d1997dbccd10a9c31ffea3b3"
},
{
"type": "WEB",
"url": "https://access.redhat.com/errata/RHSA-2022:7514"
},
{
"type": "WEB",
"url": "https://access.redhat.com/errata/RHSA-2022:8011"
},
{
"type": "WEB",
"url": "https://access.redhat.com/security/cve/CVE-2022-25309"
},
{
"type": "WEB",
"url": "https://bugzilla.redhat.com/show_bug.cgi?id=2047896"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H",
"type": "CVSS_V3"
}
]
}
GHSA-4FP6-VMPF-Q92C
Vulnerability from github – Published: 2026-07-14 18:32 – Updated: 2026-07-14 18:32
VLAI
Details
Heap-based buffer overflow in Windows DHCP Server allows an authorized attacker to elevate privileges over an adjacent network.
Severity
8.0 (High)
{
"affected": [],
"aliases": [
"CVE-2026-50683"
],
"database_specific": {
"cwe_ids": [
"CWE-122"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2026-07-14T18:18:02Z",
"severity": "HIGH"
},
"details": "Heap-based buffer overflow in Windows DHCP Server allows an authorized attacker to elevate privileges over an adjacent network.",
"id": "GHSA-4fp6-vmpf-q92c",
"modified": "2026-07-14T18:32:30Z",
"published": "2026-07-14T18:32:30Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-50683"
},
{
"type": "WEB",
"url": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-50683"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
"type": "CVSS_V3"
}
]
}
GHSA-4G26-8H9J-XWX7
Vulnerability from github – Published: 2025-08-12 18:31 – Updated: 2025-08-12 18:31
VLAI
Details
Heap-based buffer overflow in Microsoft Office Excel allows an unauthorized attacker to execute code locally.
Severity
7.8 (High)
{
"affected": [],
"aliases": [
"CVE-2025-53737"
],
"database_specific": {
"cwe_ids": [
"CWE-122",
"CWE-787"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2025-08-12T18:15:43Z",
"severity": "HIGH"
},
"details": "Heap-based buffer overflow in Microsoft Office Excel allows an unauthorized attacker to execute code locally.",
"id": "GHSA-4g26-8h9j-xwx7",
"modified": "2025-08-12T18:31:32Z",
"published": "2025-08-12T18:31:32Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2025-53737"
},
{
"type": "WEB",
"url": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-53737"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H",
"type": "CVSS_V3"
}
]
}
GHSA-4G6V-JHWQ-9XJJ
Vulnerability from github – Published: 2026-02-19 00:30 – Updated: 2026-02-19 18:31
VLAI
Details
Heap buffer overflow in PDFium in Google Chrome prior to 145.0.7632.109 allowed a remote attacker to perform an out of bounds memory write via a crafted PDF file. (Chromium security severity: High)
Severity
8.8 (High)
{
"affected": [],
"aliases": [
"CVE-2026-2648"
],
"database_specific": {
"cwe_ids": [
"CWE-122"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2026-02-18T22:16:26Z",
"severity": "HIGH"
},
"details": "Heap buffer overflow in PDFium in Google Chrome prior to 145.0.7632.109 allowed a remote attacker to perform an out of bounds memory write via a crafted PDF file. (Chromium security severity: High)",
"id": "GHSA-4g6v-jhwq-9xjj",
"modified": "2026-02-19T18:31:48Z",
"published": "2026-02-19T00:30:30Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-2648"
},
{
"type": "WEB",
"url": "https://chromereleases.googleblog.com/2026/02/stable-channel-update-for-desktop_18.html"
},
{
"type": "WEB",
"url": "https://issues.chromium.org/issues/477033835"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H",
"type": "CVSS_V3"
}
]
}
GHSA-4G83-8XC3-PP6V
Vulnerability from github – Published: 2022-05-24 17:39 – Updated: 2025-11-04 21:30
VLAI
Details
A flaw was found in dnsmasq before version 2.83. A heap-based buffer overflow was discovered in dnsmasq when DNSSEC is enabled and before it validates the received DNS entries. A remote attacker, who can create valid DNS replies, could use this flaw to cause an overflow in a heap-allocated memory. This flaw is caused by the lack of length checks in rfc1035.c:extract_name(), which could be abused to make the code execute memcpy() with a negative size in get_rdata() and cause a crash in dnsmasq, resulting in a denial of service. The highest threat from this vulnerability is to system availability.
Severity
5.9 (Medium)
{
"affected": [],
"aliases": [
"CVE-2020-25683"
],
"database_specific": {
"cwe_ids": [
"CWE-122"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2021-01-20T16:15:00Z",
"severity": "HIGH"
},
"details": "A flaw was found in dnsmasq before version 2.83. A heap-based buffer overflow was discovered in dnsmasq when DNSSEC is enabled and before it validates the received DNS entries. A remote attacker, who can create valid DNS replies, could use this flaw to cause an overflow in a heap-allocated memory. This flaw is caused by the lack of length checks in rfc1035.c:extract_name(), which could be abused to make the code execute memcpy() with a negative size in get_rdata() and cause a crash in dnsmasq, resulting in a denial of service. The highest threat from this vulnerability is to system availability.",
"id": "GHSA-4g83-8xc3-pp6v",
"modified": "2025-11-04T21:30:24Z",
"published": "2022-05-24T17:39:33Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2020-25683"
},
{
"type": "WEB",
"url": "https://bugzilla.redhat.com/show_bug.cgi?id=1882018"
},
{
"type": "WEB",
"url": "https://lists.debian.org/debian-lts-announce/2021/03/msg00027.html"
},
{
"type": "WEB",
"url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/QGB7HL3OWHTLEPSMLDGOMXQKG3KM2QME"
},
{
"type": "WEB",
"url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/WYW3IR6APUSKOYKL5FT3ACTIHWHGQY32"
},
{
"type": "WEB",
"url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/QGB7HL3OWHTLEPSMLDGOMXQKG3KM2QME"
},
{
"type": "WEB",
"url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/WYW3IR6APUSKOYKL5FT3ACTIHWHGQY32"
},
{
"type": "WEB",
"url": "https://security.gentoo.org/glsa/202101-17"
},
{
"type": "WEB",
"url": "https://www.debian.org/security/2021/dsa-4844"
},
{
"type": "WEB",
"url": "https://www.jsof-tech.com/disclosures/dnspooq"
},
{
"type": "WEB",
"url": "https://www.kb.cert.org/vuls/id/434904"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H",
"type": "CVSS_V3"
}
]
}
GHSA-4GJ2-7R4X-FMQ8
Vulnerability from github – Published: 2026-07-14 18:32 – Updated: 2026-07-14 18:32
VLAI
Details
Heap-based buffer overflow in Windows GDI+ allows an unauthorized attacker to execute code locally.
Severity
7.8 (High)
{
"affected": [],
"aliases": [
"CVE-2026-49796"
],
"database_specific": {
"cwe_ids": [
"CWE-122"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2026-07-14T17:16:55Z",
"severity": "HIGH"
},
"details": "Heap-based buffer overflow in Windows GDI+ allows an unauthorized attacker to execute code locally.",
"id": "GHSA-4gj2-7r4x-fmq8",
"modified": "2026-07-14T18:32:02Z",
"published": "2026-07-14T18:32:02Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-49796"
},
{
"type": "WEB",
"url": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-49796"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H",
"type": "CVSS_V3"
}
]
}
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.