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().
6337 vulnerabilities reference this CWE, most recent first.
GHSA-5HQX-WMCQ-RHHJ
Vulnerability from github – Published: 2026-10-13 21:37 – Updated: 2026-10-13 21:37Heap-based buffer overflow in Microsoft Office Excel allows an unauthorized attacker to execute code over a network.
{
"affected": [],
"aliases": [
"CVE-2026-97003"
],
"database_specific": {
"cwe_ids": [
"CWE-122"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2026-10-13T19:22:09Z",
"severity": "HIGH"
},
"details": "Heap-based buffer overflow in Microsoft Office Excel allows an unauthorized attacker to execute code over a network.",
"id": "GHSA-5hqx-wmcq-rhhj",
"modified": "2026-10-13T21:37:09Z",
"published": "2026-10-13T21:37:09Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-97003"
},
{
"type": "WEB",
"url": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-97003"
}
],
"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-5HVG-R2MF-RVX6
Vulnerability from github – Published: 2026-10-13 21:37 – Updated: 2026-10-13 21:37Heap-based buffer overflow in SQL Server allows an authorized attacker to execute code over a network.
{
"affected": [],
"aliases": [
"CVE-2026-83945"
],
"database_specific": {
"cwe_ids": [
"CWE-122"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2026-10-13T21:19:09Z",
"severity": "MODERATE"
},
"details": "Heap-based buffer overflow in SQL Server allows an authorized attacker to execute code over a network.",
"id": "GHSA-5hvg-r2mf-rvx6",
"modified": "2026-10-13T21:37:32Z",
"published": "2026-10-13T21:37:32Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-83945"
},
{
"type": "WEB",
"url": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-83945"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H",
"type": "CVSS_V3"
}
]
}
GHSA-5HXP-WCVM-357W
Vulnerability from github – Published: 2025-10-14 18:30 – Updated: 2025-10-14 18:30A heap-based buffer overflow in Fortinet FortiSRA 1.5.0, 1.4.0 through 1.4.2, FortiPAM 1.5.0, 1.4.0 through 1.4.2, 1.3.0 through 1.3.1, 1.2.0, 1.1.0 through 1.1.2, 1.0.0 through 1.0.3, FortiProxy 7.6.0 through 7.6.1, 7.4.0 through 7.4.7, FortiOS 7.6.0 through 7.6.2, 7.4.0 through 7.4.6, 7.2.0 through 7.2.10, 7.0.2 through 7.0.16, FortiSwitchManager 7.2.1 through 7.2.5 allows attackers to escalate their privilege via specially crafted http requests.
{
"affected": [],
"aliases": [
"CVE-2025-22258"
],
"database_specific": {
"cwe_ids": [
"CWE-122"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2025-10-14T16:15:36Z",
"severity": "MODERATE"
},
"details": "A heap-based buffer overflow in Fortinet FortiSRA 1.5.0, 1.4.0 through 1.4.2, FortiPAM 1.5.0, 1.4.0 through 1.4.2, 1.3.0 through 1.3.1, 1.2.0, 1.1.0 through 1.1.2, 1.0.0 through 1.0.3, FortiProxy 7.6.0 through 7.6.1, 7.4.0 through 7.4.7, FortiOS 7.6.0 through 7.6.2, 7.4.0 through 7.4.6, 7.2.0 through 7.2.10, 7.0.2 through 7.0.16, FortiSwitchManager 7.2.1 through 7.2.5 allows attackers to escalate their privilege via specially crafted http requests.",
"id": "GHSA-5hxp-wcvm-357w",
"modified": "2025-10-14T18:30:27Z",
"published": "2025-10-14T18:30:27Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2025-22258"
},
{
"type": "WEB",
"url": "https://fortiguard.fortinet.com/psirt/FG-IR-24-546"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:H/A:H",
"type": "CVSS_V3"
}
]
}
GHSA-5J2J-J2VJ-6M3J
Vulnerability from github – Published: 2026-03-12 00:31 – Updated: 2026-03-12 21:34Heap buffer overflow in WebML in Google Chrome prior to 146.0.7680.71 allowed a remote attacker to perform an out of bounds memory read via a crafted HTML page. (Chromium security severity: High)
{
"affected": [],
"aliases": [
"CVE-2026-3915"
],
"database_specific": {
"cwe_ids": [
"CWE-122"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2026-03-11T22:16:33Z",
"severity": "HIGH"
},
"details": "Heap buffer overflow in WebML in Google Chrome prior to 146.0.7680.71 allowed a remote attacker to perform an out of bounds memory read via a crafted HTML page. (Chromium security severity: High)",
"id": "GHSA-5j2j-j2vj-6m3j",
"modified": "2026-03-12T21:34:45Z",
"published": "2026-03-12T00:31:16Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-3915"
},
{
"type": "WEB",
"url": "https://chromereleases.googleblog.com/2026/03/stable-channel-update-for-desktop_10.html"
},
{
"type": "WEB",
"url": "https://issues.chromium.org/issues/483971526"
}
],
"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-5J3F-QQG5-RGCQ
Vulnerability from github – Published: 2026-10-13 21:34 – Updated: 2026-10-13 21:34Heap-based buffer overflow in Microsoft Windows Media Foundation allows an unauthorized attacker to elevate privileges locally.
{
"affected": [],
"aliases": [
"CVE-2026-70131"
],
"database_specific": {
"cwe_ids": [
"CWE-122"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2026-10-13T19:19:25Z",
"severity": "HIGH"
},
"details": "Heap-based buffer overflow in Microsoft Windows Media Foundation allows an unauthorized attacker to elevate privileges locally.",
"id": "GHSA-5j3f-qqg5-rgcq",
"modified": "2026-10-13T21:34:07Z",
"published": "2026-10-13T21:34:07Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-70131"
},
{
"type": "WEB",
"url": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-70131"
}
],
"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-5J8G-CMHW-G45P
Vulnerability from github – Published: 2024-09-10 12:30 – Updated: 2024-09-10 12:30A vulnerability has been identified in SIMATIC Information Server 2022 (All versions), SIMATIC Information Server 2024 (All versions), SIMATIC PCS neo V4.0 (All versions), SIMATIC PCS neo V4.1 (All versions < V4.1 Update 2), SIMATIC PCS neo V5.0 (All versions), SINEC NMS (All versions), Totally Integrated Automation Portal (TIA Portal) V16 (All versions), Totally Integrated Automation Portal (TIA Portal) V17 (All versions < V17 Update 8), Totally Integrated Automation Portal (TIA Portal) V18 (All versions), Totally Integrated Automation Portal (TIA Portal) V19 (All versions). Affected products contain a heap-based buffer overflow vulnerability in the integrated UMC component. This could allow an unauthenticated remote attacker to execute arbitrary code.
{
"affected": [],
"aliases": [
"CVE-2024-33698"
],
"database_specific": {
"cwe_ids": [
"CWE-122"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2024-09-10T10:15:09Z",
"severity": "CRITICAL"
},
"details": "A vulnerability has been identified in SIMATIC Information Server 2022 (All versions), SIMATIC Information Server 2024 (All versions), SIMATIC PCS neo V4.0 (All versions), SIMATIC PCS neo V4.1 (All versions \u003c V4.1 Update 2), SIMATIC PCS neo V5.0 (All versions), SINEC NMS (All versions), Totally Integrated Automation Portal (TIA Portal) V16 (All versions), Totally Integrated Automation Portal (TIA Portal) V17 (All versions \u003c V17 Update 8), Totally Integrated Automation Portal (TIA Portal) V18 (All versions), Totally Integrated Automation Portal (TIA Portal) V19 (All versions). Affected products contain a heap-based buffer overflow vulnerability in the integrated UMC component. This could allow an unauthenticated remote attacker to execute arbitrary code.",
"id": "GHSA-5j8g-cmhw-g45p",
"modified": "2024-09-10T12:30:37Z",
"published": "2024-09-10T12:30:37Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2024-33698"
},
{
"type": "WEB",
"url": "https://cert-portal.siemens.com/productcert/html/ssa-039007.html"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
"type": "CVSS_V3"
},
{
"score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/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-5J96-JMXF-J97Q
Vulnerability from github – Published: 2026-07-02 00:31 – Updated: 2026-07-02 00:31Heap buffer overflow in Skia in Google Chrome prior to 150.0.7871.46 allowed a remote attacker who had compromised the renderer process to potentially perform a sandbox escape via a crafted HTML page. (Chromium security severity: Critical)
{
"affected": [],
"aliases": [
"CVE-2026-14427"
],
"database_specific": {
"cwe_ids": [
"CWE-122"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2026-07-01T23:16:51Z",
"severity": "HIGH"
},
"details": "Heap buffer overflow in Skia in Google Chrome prior to 150.0.7871.46 allowed a remote attacker who had compromised the renderer process to potentially perform a sandbox escape via a crafted HTML page. (Chromium security severity: Critical)",
"id": "GHSA-5j96-jmxf-j97q",
"modified": "2026-07-02T00:31:42Z",
"published": "2026-07-02T00:31:42Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-14427"
},
{
"type": "WEB",
"url": "https://chromereleases.googleblog.com/2026/06/stable-channel-update-for-desktop_0175352312.html"
},
{
"type": "WEB",
"url": "https://issues.chromium.org/issues/520113415"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:H/A:H",
"type": "CVSS_V3"
}
]
}
GHSA-5JCV-XQP8-F3WF
Vulnerability from github – Published: 2026-07-30 03:31 – Updated: 2026-07-30 18:31Heap buffer overflow in Codecs in Google Chrome prior to 151.0.7922.72 allowed a remote attacker to execute arbitrary code inside a sandbox via a crafted HTML page. (Chromium security severity: Low)
{
"affected": [],
"aliases": [
"CVE-2026-17935"
],
"database_specific": {
"cwe_ids": [
"CWE-122"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2026-07-30T01:16:57Z",
"severity": "HIGH"
},
"details": "Heap buffer overflow in Codecs in Google Chrome prior to 151.0.7922.72 allowed a remote attacker to execute arbitrary code inside a sandbox via a crafted HTML page. (Chromium security severity: Low)",
"id": "GHSA-5jcv-xqp8-f3wf",
"modified": "2026-07-30T18:31:29Z",
"published": "2026-07-30T03:31:17Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-17935"
},
{
"type": "WEB",
"url": "https://chromereleases.googleblog.com/2026/07/stable-channel-update-for-desktop_0887107924.html"
},
{
"type": "WEB",
"url": "https://issues.chromium.org/issues/513863267"
}
],
"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-5JH2-2F4M-VPVC
Vulnerability from github – Published: 2026-08-11 18:31 – Updated: 2026-08-11 18:31Heap-based buffer overflow in Windows SMB Server allows an authorized attacker to execute code over a network.
{
"affected": [],
"aliases": [
"CVE-2026-62790"
],
"database_specific": {
"cwe_ids": [
"CWE-122"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2026-08-11T17:18:32Z",
"severity": "HIGH"
},
"details": "Heap-based buffer overflow in Windows SMB Server allows an authorized attacker to execute code over a network.",
"id": "GHSA-5jh2-2f4m-vpvc",
"modified": "2026-08-11T18:31:23Z",
"published": "2026-08-11T18:31:23Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-62790"
},
{
"type": "WEB",
"url": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-62790"
}
],
"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"
}
]
}
GHSA-5JHP-6RW8-QP3W
Vulnerability from github – Published: 2026-09-08 18:32 – Updated: 2026-09-08 18:32Heap-based buffer overflow in Windows Remote Desktop allows an unauthorized attacker to execute code over a network.
{
"affected": [],
"aliases": [
"CVE-2026-69518"
],
"database_specific": {
"cwe_ids": [
"CWE-122"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2026-09-08T18:19:19Z",
"severity": "HIGH"
},
"details": "Heap-based buffer overflow in Windows Remote Desktop allows an unauthorized attacker to execute code over a network.",
"id": "GHSA-5jhp-6rw8-qp3w",
"modified": "2026-09-08T18:32:43Z",
"published": "2026-09-08T18:32:43Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-69518"
},
{
"type": "WEB",
"url": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-69518"
}
],
"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"
}
]
}
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.