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().
5347 vulnerabilities reference this CWE, most recent first.
GHSA-3VCM-9WGV-947G
Vulnerability from github – Published: 2026-05-01 15:30 – Updated: 2026-05-01 18:31A heap-based out-of-bounds read vulnerability in RWObj_Reader::read in the OBJ file parser in Open CASCADE Technology (OCCT) V8_0_0_rc5 allows user-assisted attackers to cause a denial of service or obtain sensitive information by persuading a victim to open a crafted OBJ file. The issue occurs because Standard_ReadLineBuffer::ReadLine() can return a 1-byte buffer for a minimal OBJ line, and RWObj_Reader::read() calls pushIndices(aLine + 2) without validating the buffer length.
{
"affected": [],
"aliases": [
"CVE-2026-42477"
],
"database_specific": {
"cwe_ids": [
"CWE-122",
"CWE-125"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2026-05-01T15:16:43Z",
"severity": "HIGH"
},
"details": "A heap-based out-of-bounds read vulnerability in RWObj_Reader::read in the OBJ file parser in Open CASCADE Technology (OCCT) V8_0_0_rc5 allows user-assisted attackers to cause a denial of service or obtain sensitive information by persuading a victim to open a crafted OBJ file. The issue occurs because Standard_ReadLineBuffer::ReadLine() can return a 1-byte buffer for a minimal OBJ line, and RWObj_Reader::read() calls pushIndices(aLine + 2) without validating the buffer length.",
"id": "GHSA-3vcm-9wgv-947g",
"modified": "2026-05-01T18:31:23Z",
"published": "2026-05-01T15:30:36Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-42477"
},
{
"type": "WEB",
"url": "https://gist.github.com/sgInnora/dfba083d04906283e9c92aea78e2d94a"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:H",
"type": "CVSS_V3"
}
]
}
GHSA-3VGV-CG7R-QGVJ
Vulnerability from github – Published: 2022-05-13 01:08 – Updated: 2022-05-13 01:08procps-ng before version 3.3.15 is vulnerable to a denial of service in ps via mmap buffer overflow. Inbuilt protection in ps maps a guard page at the end of the overflowed buffer, ensuring that the impact of this flaw is limited to a crash (temporary denial of service).
{
"affected": [],
"aliases": [
"CVE-2018-1123"
],
"database_specific": {
"cwe_ids": [
"CWE-122"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2018-05-23T14:29:00Z",
"severity": "HIGH"
},
"details": "procps-ng before version 3.3.15 is vulnerable to a denial of service in ps via mmap buffer overflow. Inbuilt protection in ps maps a guard page at the end of the overflowed buffer, ensuring that the impact of this flaw is limited to a crash (temporary denial of service).",
"id": "GHSA-3vgv-cg7r-qgvj",
"modified": "2022-05-13T01:08:59Z",
"published": "2022-05-13T01:08:59Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2018-1123"
},
{
"type": "WEB",
"url": "https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2018-1123"
},
{
"type": "WEB",
"url": "https://lists.apache.org/thread.html/r58af02e294bd07f487e2c64ffc0a29b837db5600e33b6e698b9d696b@%3Cissues.bookkeeper.apache.org%3E"
},
{
"type": "WEB",
"url": "https://lists.apache.org/thread.html/rf4c02775860db415b4955778a131c2795223f61cb8c6a450893651e4@%3Cissues.bookkeeper.apache.org%3E"
},
{
"type": "WEB",
"url": "https://lists.debian.org/debian-lts-announce/2018/05/msg00021.html"
},
{
"type": "WEB",
"url": "https://security.gentoo.org/glsa/201805-14"
},
{
"type": "WEB",
"url": "https://usn.ubuntu.com/3658-1"
},
{
"type": "WEB",
"url": "https://usn.ubuntu.com/3658-3"
},
{
"type": "WEB",
"url": "https://www.debian.org/security/2018/dsa-4208"
},
{
"type": "WEB",
"url": "https://www.exploit-db.com/exploits/44806"
},
{
"type": "WEB",
"url": "https://www.qualys.com/2018/05/17/procps-ng-audit-report-advisory.txt"
},
{
"type": "WEB",
"url": "http://lists.opensuse.org/opensuse-security-announce/2019-10/msg00058.html"
},
{
"type": "WEB",
"url": "http://lists.opensuse.org/opensuse-security-announce/2019-10/msg00059.html"
},
{
"type": "WEB",
"url": "http://seclists.org/oss-sec/2018/q2/122"
},
{
"type": "WEB",
"url": "http://www.securityfocus.com/bid/104214"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
"type": "CVSS_V3"
}
]
}
GHSA-3VH9-FQGX-VJPH
Vulnerability from github – Published: 2025-06-10 18:32 – Updated: 2025-06-10 18:32Heap-based buffer overflow in Windows Common Log File System Driver allows an authorized attacker to elevate privileges locally.
{
"affected": [],
"aliases": [
"CVE-2025-32713"
],
"database_specific": {
"cwe_ids": [
"CWE-122"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2025-06-10T17:21:49Z",
"severity": "HIGH"
},
"details": "Heap-based buffer overflow in Windows Common Log File System Driver allows an authorized attacker to elevate privileges locally.",
"id": "GHSA-3vh9-fqgx-vjph",
"modified": "2025-06-10T18:32:28Z",
"published": "2025-06-10T18:32:28Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2025-32713"
},
{
"type": "WEB",
"url": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-32713"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
"type": "CVSS_V3"
}
]
}
GHSA-3VJ7-WW59-W49R
Vulnerability from github – Published: 2026-08-11 18:31 – Updated: 2026-08-11 18:31Heap-based buffer overflow in Windows Sensor Data Service allows an authorized attacker to elevate privileges locally.
{
"affected": [],
"aliases": [
"CVE-2026-61355"
],
"database_specific": {
"cwe_ids": [
"CWE-122"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2026-08-11T17:18:10Z",
"severity": "HIGH"
},
"details": "Heap-based buffer overflow in Windows Sensor Data Service allows an authorized attacker to elevate privileges locally.",
"id": "GHSA-3vj7-ww59-w49r",
"modified": "2026-08-11T18:31:05Z",
"published": "2026-08-11T18:31:05Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-61355"
},
{
"type": "WEB",
"url": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-61355"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
"type": "CVSS_V3"
}
]
}
GHSA-3VVG-G694-HH8M
Vulnerability from github – Published: 2026-09-08 18:32 – Updated: 2026-09-08 18:32Heap-based buffer overflow in Windows Audio Service allows an authorized attacker to elevate privileges locally.
{
"affected": [],
"aliases": [
"CVE-2026-69394"
],
"database_specific": {
"cwe_ids": [
"CWE-122"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2026-09-08T18:19:01Z",
"severity": "HIGH"
},
"details": "Heap-based buffer overflow in Windows Audio Service allows an authorized attacker to elevate privileges locally.",
"id": "GHSA-3vvg-g694-hh8m",
"modified": "2026-09-08T18:32:30Z",
"published": "2026-09-08T18:32:30Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-69394"
},
{
"type": "WEB",
"url": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-69394"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H",
"type": "CVSS_V3"
}
]
}
GHSA-3W26-2CXG-PVH3
Vulnerability from github – Published: 2026-08-01 15:30 – Updated: 2026-09-08 15:31FreeRDP Windows client before 3.29.0 contains a heap buffer overflow vulnerability in the clipboard virtual channel when processing CLIPRDR_FILE_CONTENTS_RESPONSE PDUs without validating the server-provided size against the destination buffer. A malicious RDP server can send a response with a data payload significantly larger than requested, causing arbitrary heap memory corruption that may enable remote code execution when a user performs a paste operation.
{
"affected": [],
"aliases": [
"CVE-2026-67305"
],
"database_specific": {
"cwe_ids": [
"CWE-122"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2026-08-01T13:17:00Z",
"severity": "CRITICAL"
},
"details": "FreeRDP Windows client before 3.29.0 contains a heap buffer overflow vulnerability in the clipboard virtual channel when processing CLIPRDR_FILE_CONTENTS_RESPONSE PDUs without validating the server-provided size against the destination buffer. A malicious RDP server can send a response with a data payload significantly larger than requested, causing arbitrary heap memory corruption that may enable remote code execution when a user performs a paste operation.",
"id": "GHSA-3w26-2cxg-pvh3",
"modified": "2026-09-08T15:31:28Z",
"published": "2026-08-01T15:30:26Z",
"references": [
{
"type": "WEB",
"url": "https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-cj9v-h4hq-29jr"
},
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-67305"
},
{
"type": "WEB",
"url": "https://www.vulncheck.com/advisories/freerdp-windows-client-before-heap-buffer-overflow-via-cliprdr"
}
],
"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"
},
{
"score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X",
"type": "CVSS_V4"
}
]
}
GHSA-3W28-C3V9-22GP
Vulnerability from github – Published: 2025-11-04 09:31 – Updated: 2025-11-04 21:31In wlan AP driver, there is a possible out of bounds write due to an incorrect bounds check. This could lead to local escalation of privilege if a malicious actor has already obtained the System privilege (when OceReducedNeighborReport is disabled). User interaction is not needed for exploitation. Patch ID: WCNCR00441511; Issue ID: MSV-4140.
{
"affected": [],
"aliases": [
"CVE-2025-20731"
],
"database_specific": {
"cwe_ids": [
"CWE-122",
"CWE-787"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2025-11-04T07:15:37Z",
"severity": "MODERATE"
},
"details": "In wlan AP driver, there is a possible out of bounds write due to an incorrect bounds check. This could lead to local escalation of privilege if a malicious actor has already obtained the System privilege (when OceReducedNeighborReport is disabled). User interaction is not needed for exploitation. Patch ID: WCNCR00441511; Issue ID: MSV-4140.",
"id": "GHSA-3w28-c3v9-22gp",
"modified": "2025-11-04T21:31:34Z",
"published": "2025-11-04T09:31:16Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2025-20731"
},
{
"type": "WEB",
"url": "https://corp.mediatek.com/product-security-bulletin/November-2025"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L",
"type": "CVSS_V3"
}
]
}
GHSA-3W29-PR8J-373F
Vulnerability from github – Published: 2026-07-14 18:32 – Updated: 2026-07-14 18:32Heap-based buffer overflow in Windows NTFS allows an authorized attacker to execute code locally.
{
"affected": [],
"aliases": [
"CVE-2026-50482"
],
"database_specific": {
"cwe_ids": [
"CWE-122"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2026-07-14T18:17:54Z",
"severity": "HIGH"
},
"details": "Heap-based buffer overflow in Windows NTFS allows an authorized attacker to execute code locally.",
"id": "GHSA-3w29-pr8j-373f",
"modified": "2026-07-14T18:32:26Z",
"published": "2026-07-14T18:32:26Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-50482"
},
{
"type": "WEB",
"url": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-50482"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H",
"type": "CVSS_V3"
}
]
}
GHSA-3W9W-7H4M-FVMR
Vulnerability from github – Published: 2026-08-11 18:31 – Updated: 2026-08-11 18:31Heap-based buffer overflow in Microsoft Office Excel allows an unauthorized attacker to execute code locally.
{
"affected": [],
"aliases": [
"CVE-2026-68812"
],
"database_specific": {
"cwe_ids": [
"CWE-122"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2026-08-11T17:19:05Z",
"severity": "HIGH"
},
"details": "Heap-based buffer overflow in Microsoft Office Excel allows an unauthorized attacker to execute code locally.",
"id": "GHSA-3w9w-7h4m-fvmr",
"modified": "2026-08-11T18:31:44Z",
"published": "2026-08-11T18:31:44Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-68812"
},
{
"type": "WEB",
"url": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-68812"
}
],
"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-3WCP-53MW-3RWQ
Vulnerability from github – Published: 2026-08-11 18:31 – Updated: 2026-08-11 18:31Heap-based buffer overflow in Microsoft Local Security Authority Server (lsasrv) allows an authorized attacker to execute code over a network.
{
"affected": [],
"aliases": [
"CVE-2026-62784"
],
"database_specific": {
"cwe_ids": [
"CWE-122"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2026-08-11T17:18:31Z",
"severity": "HIGH"
},
"details": "Heap-based buffer overflow in Microsoft Local Security Authority Server (lsasrv) allows an authorized attacker to execute code over a network.",
"id": "GHSA-3wcp-53mw-3rwq",
"modified": "2026-08-11T18:31:22Z",
"published": "2026-08-11T18:31:22Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-62784"
},
{
"type": "WEB",
"url": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-62784"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/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
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.