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().
5348 vulnerabilities reference this CWE, most recent first.
GHSA-4G26-8H9J-XWX7
Vulnerability from github – Published: 2025-08-12 18:31 – Updated: 2025-08-12 18:31Heap-based buffer overflow in Microsoft Office Excel allows an unauthorized attacker to execute code locally.
{
"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-4G54-V22X-6XQ2
Vulnerability from github – Published: 2026-07-28 18:33 – Updated: 2026-07-30 21:31schreibfaul1 ESP32-audioI2S 3.4.5 has a heap-based buffer overflow vulnerability in the host parsing logic. The dismantle_host() function parses untrusted host and URL input, and subsequent code uses clone_from() to copy parsed host, request host, extension and query_string segments into fixed heap buffers without boundary checking.
{
"affected": [],
"aliases": [
"CVE-2026-51268"
],
"database_specific": {
"cwe_ids": [
"CWE-122"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2026-07-28T16:18:50Z",
"severity": "CRITICAL"
},
"details": "schreibfaul1 ESP32-audioI2S 3.4.5 has a heap-based buffer overflow vulnerability in the host parsing logic. The dismantle_host() function parses untrusted host and URL input, and subsequent code uses clone_from() to copy parsed host, request host, extension and query_string segments into fixed heap buffers without boundary checking.",
"id": "GHSA-4g54-v22x-6xq2",
"modified": "2026-07-30T21:31:27Z",
"published": "2026-07-28T18:33:02Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-51268"
},
{
"type": "WEB",
"url": "https://github.com/programmervuln/cveadvisory-/blob/main/CVE-2026-51268"
},
{
"type": "WEB",
"url": "https://github.com/schreibfaul1/ESP32-audioI2S/blob/master/src/Audio.cpp"
}
],
"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"
}
]
}
GHSA-4G6H-PG6M-QWGX
Vulnerability from github – Published: 2026-08-13 15:34 – Updated: 2026-08-13 15:34Heap buffer overflow in PostgreSQL pg_dump of long function transform lists allows an object creator to execute arbitrary code as the operating system user running pg_dump, via a crafted transform list. Versions before PostgreSQL 18.5, 17.11, 16.15, 15.19, and 14.24 are affected.
{
"affected": [],
"aliases": [
"CVE-2026-19385"
],
"database_specific": {
"cwe_ids": [
"CWE-122"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2026-08-13T13:17:48Z",
"severity": "HIGH"
},
"details": "Heap buffer overflow in PostgreSQL pg_dump of long function transform lists allows an object creator to execute arbitrary code as the operating system user running pg_dump, via a crafted transform list. Versions before PostgreSQL 18.5, 17.11, 16.15, 15.19, and 14.24 are affected.",
"id": "GHSA-4g6h-pg6m-qwgx",
"modified": "2026-08-13T15:34:36Z",
"published": "2026-08-13T15:34:36Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-19385"
},
{
"type": "WEB",
"url": "https://www.postgresql.org/support/security/CVE-2026-19385"
}
],
"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-4G6V-JHWQ-9XJJ
Vulnerability from github – Published: 2026-02-19 00:30 – Updated: 2026-02-19 18:31Heap 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)
{
"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-4G7P-H353-2Q55
Vulnerability from github – Published: 2026-09-16 21:32 – Updated: 2026-09-21 18:31HP has identified and remediated multiple externally reported vulnerabilities within HPLIP. The findings affect several software components that could potentially enable remote code execution, privilege escalation, denial of service, information disclosure, or unauthorized file modification under certain conditions.
{
"affected": [],
"aliases": [
"CVE-2026-91104"
],
"database_specific": {
"cwe_ids": [
"CWE-122"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2026-09-16T19:18:03Z",
"severity": "CRITICAL"
},
"details": "HP has identified and remediated multiple externally reported vulnerabilities within HPLIP. The findings affect several software components that could potentially enable remote code execution, privilege escalation, denial of service, information disclosure, or unauthorized file modification under certain conditions.",
"id": "GHSA-4g7p-h353-2q55",
"modified": "2026-09-21T18:31:56Z",
"published": "2026-09-16T21:32:44Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-91104"
},
{
"type": "WEB",
"url": "https://support.hp.com/us-en/document/ish_15646959-15646984-16/hpsbpi04151"
}
],
"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-4G83-8XC3-PP6V
Vulnerability from github – Published: 2022-05-24 17:39 – Updated: 2025-11-04 21:30A 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.
{
"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 18:32Heap-based buffer overflow in Windows GDI+ allows an unauthorized attacker to execute code locally.
{
"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"
}
]
}
GHSA-4GJR-9VHM-VXGX
Vulnerability from github – Published: 2024-04-09 18:30 – Updated: 2024-04-09 18:30Microsoft ODBC Driver for SQL Server Remote Code Execution Vulnerability
{
"affected": [],
"aliases": [
"CVE-2024-28941"
],
"database_specific": {
"cwe_ids": [
"CWE-122"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2024-04-09T17:15:56Z",
"severity": "HIGH"
},
"details": "Microsoft ODBC Driver for SQL Server Remote Code Execution Vulnerability",
"id": "GHSA-4gjr-9vhm-vxgx",
"modified": "2024-04-09T18:30:27Z",
"published": "2024-04-09T18:30:27Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2024-28941"
},
{
"type": "WEB",
"url": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2024-28941"
}
],
"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-4GR6-XFW9-H47F
Vulnerability from github – Published: 2024-12-10 15:32 – Updated: 2024-12-10 15:32A vulnerability has been identified in Solid Edge SE2024 (All versions < V224.0 Update 5). The affected application is vulnerable to heap-based buffer overflow while parsing specially crafted ASM files. This could allow an attacker to execute code in the context of the current process.
{
"affected": [],
"aliases": [
"CVE-2024-54093"
],
"database_specific": {
"cwe_ids": [
"CWE-122"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2024-12-10T14:30:47Z",
"severity": "HIGH"
},
"details": "A vulnerability has been identified in Solid Edge SE2024 (All versions \u003c V224.0 Update 5). The affected application is vulnerable to heap-based buffer overflow while parsing specially crafted ASM files. This could allow an attacker to execute code in the context of the current process.",
"id": "GHSA-4gr6-xfw9-h47f",
"modified": "2024-12-10T15:32:31Z",
"published": "2024-12-10T15:32:31Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2024-54093"
},
{
"type": "WEB",
"url": "https://cert-portal.siemens.com/productcert/html/ssa-730188.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"
},
{
"score": "CVSS:4.0/AV:L/AC:H/AT:N/PR:N/UI:P/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-4GRM-XC99-7X47
Vulnerability from github – Published: 2025-02-25 21:31 – Updated: 2025-02-25 21:31Buffer overflow in some Zoom Workplace Apps and SDKs may allow an authenticated user to conduct a denial of service via network access.
{
"affected": [],
"aliases": [
"CVE-2024-27245"
],
"database_specific": {
"cwe_ids": [
"CWE-122"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2025-02-25T21:15:15Z",
"severity": "MODERATE"
},
"details": "Buffer overflow in some Zoom Workplace Apps and SDKs may allow an authenticated user to conduct a denial of service via network access.",
"id": "GHSA-4grm-xc99-7x47",
"modified": "2025-02-25T21:31:45Z",
"published": "2025-02-25T21:31:45Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2024-27245"
},
{
"type": "WEB",
"url": "https://www.zoom.com/en/trust/security-bulletin/zsb-24016"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L",
"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.