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-3XXG-9VRR-9G96
Vulnerability from github – Published: 2024-08-14 18:32 – Updated: 2024-08-14 18:32Buffer overflow in some Zoom Workplace Apps and Rooms Clients may allow an authenticated user to conduct an escalation of privilege via network access.
{
"affected": [],
"aliases": [
"CVE-2024-39825"
],
"database_specific": {
"cwe_ids": [
"CWE-122",
"CWE-787"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2024-08-14T17:15:15Z",
"severity": "HIGH"
},
"details": "Buffer overflow in some Zoom Workplace Apps and Rooms Clients may allow an authenticated user to conduct an escalation of privilege via network access.",
"id": "GHSA-3xxg-9vrr-9g96",
"modified": "2024-08-14T18:32:43Z",
"published": "2024-08-14T18:32:43Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2024-39825"
},
{
"type": "WEB",
"url": "https://www.zoom.com/en/trust/security-bulletin/zsb-24022"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H",
"type": "CVSS_V3"
}
]
}
GHSA-422F-JGV4-F2GF
Vulnerability from github – Published: 2025-03-13 18:32 – Updated: 2025-03-13 18:32Delta Electronics CNCSoft-G2 Version 2.1.0.16 and prior lacks proper validation of the length of user-supplied data prior to copying it to a fixed-length heap-based buffer. If a target visits a malicious page or opens a malicious file an attacker can leverage this vulnerability to execute code in the context of the current process.
{
"affected": [],
"aliases": [
"CVE-2024-12858"
],
"database_specific": {
"cwe_ids": [
"CWE-122"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2025-03-13T17:15:25Z",
"severity": "HIGH"
},
"details": "Delta Electronics CNCSoft-G2 Version 2.1.0.16 and prior lacks proper \nvalidation of the length of user-supplied data prior to copying it to a \nfixed-length heap-based buffer. If a target visits a malicious page or \nopens a malicious file an attacker can leverage this vulnerability to \nexecute code in the context of the current process.",
"id": "GHSA-422f-jgv4-f2gf",
"modified": "2025-03-13T18:32:22Z",
"published": "2025-03-13T18:32:21Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2024-12858"
},
{
"type": "WEB",
"url": "https://downloadcenter.delta-china.com.cn/zh-CN/DownloadCenter?v=1\u0026q=cncsoft\u0026sort_expr=cdate\u0026sort_dir=DESC"
},
{
"type": "WEB",
"url": "https://filecenter.deltaww.com/news/download/doc/Delta-PCSA-2025-00002_CNCSoft-G2%20-%20Heap-based%20Buffer%20Overflow_v2.pdf"
},
{
"type": "WEB",
"url": "https://www.cisa.gov/news-events/ics-advisories/icsa-24-191-01"
}
],
"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:L/AT:N/PR:N/UI:A/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-425X-VJQW-CPXF
Vulnerability from github – Published: 2026-09-08 18:33 – Updated: 2026-09-08 18:33Heap-based buffer overflow in Windows Defender Firewall Service allows an authorized attacker to elevate privileges locally.
{
"affected": [],
"aliases": [
"CVE-2026-70568"
],
"database_specific": {
"cwe_ids": [
"CWE-122"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2026-09-08T18:20:09Z",
"severity": "HIGH"
},
"details": "Heap-based buffer overflow in Windows Defender Firewall Service allows an authorized attacker to elevate privileges locally.",
"id": "GHSA-425x-vjqw-cpxf",
"modified": "2026-09-08T18:33:06Z",
"published": "2026-09-08T18:33:06Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-70568"
},
{
"type": "WEB",
"url": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-70568"
}
],
"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-428G-Q4G3-3QV6
Vulnerability from github – Published: 2026-09-18 21:32 – Updated: 2026-09-18 21:32IBM MQ for HPE NonStop 8.1.0 through 8.1.0.40 could allow an authenticated attacker to cause a denial of service or potentially execute arbitrary code during queue manager startup due to improper validation of cluster migration data.
{
"affected": [],
"aliases": [
"CVE-2026-11716"
],
"database_specific": {
"cwe_ids": [
"CWE-122"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2026-09-18T20:17:02Z",
"severity": "HIGH"
},
"details": "IBM MQ for HPE NonStop 8.1.0 through 8.1.0.40 could allow an authenticated attacker to cause a denial of service or potentially execute arbitrary code during queue manager startup due to improper validation of cluster migration data.",
"id": "GHSA-428g-q4g3-3qv6",
"modified": "2026-09-18T21:32:25Z",
"published": "2026-09-18T21:32:25Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-11716"
},
{
"type": "WEB",
"url": "https://www.ibm.com/support/pages/node/7287705"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H",
"type": "CVSS_V3"
}
]
}
GHSA-42C8-MV2F-C47W
Vulnerability from github – Published: 2023-09-15 09:30 – Updated: 2024-04-04 07:42Dell PowerEdge BIOS and Dell Precision BIOS contain a buffer overflow vulnerability. A local malicious user with high privileges could potentially exploit this vulnerability, leading to corrupt memory and potentially escalate privileges.
{
"affected": [],
"aliases": [
"CVE-2023-32461"
],
"database_specific": {
"cwe_ids": [
"CWE-122"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2023-09-15T07:15:09Z",
"severity": "MODERATE"
},
"details": "\nDell PowerEdge BIOS and Dell Precision BIOS contain a buffer overflow vulnerability. A local malicious user with high privileges could potentially exploit this vulnerability, leading to corrupt memory and potentially escalate privileges. \u00a0\n\n",
"id": "GHSA-42c8-mv2f-c47w",
"modified": "2024-04-04T07:42:06Z",
"published": "2023-09-15T09:30:19Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2023-32461"
},
{
"type": "WEB",
"url": "https://www.dell.com/support/kbdoc/en-us/000216543/dsa-2023-292-security-update-for-dell-poweredge-server-bios-vulnerability"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:C/C:L/I:L/A:L",
"type": "CVSS_V3"
}
]
}
GHSA-432X-2M54-V47G
Vulnerability from github – Published: 2026-09-08 18:32 – Updated: 2026-09-08 18:32Heap-based buffer overflow in Windows CD-ROM Driver allows an authorized attacker to elevate privileges locally.
{
"affected": [],
"aliases": [
"CVE-2026-69283"
],
"database_specific": {
"cwe_ids": [
"CWE-122"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2026-09-08T18:18:42Z",
"severity": "HIGH"
},
"details": "Heap-based buffer overflow in Windows CD-ROM Driver allows an authorized attacker to elevate privileges locally.",
"id": "GHSA-432x-2m54-v47g",
"modified": "2026-09-08T18:32:19Z",
"published": "2026-09-08T18:32:19Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-69283"
},
{
"type": "WEB",
"url": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-69283"
}
],
"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-435F-WCRW-9X3X
Vulnerability from github – Published: 2026-07-18 21:30 – Updated: 2026-07-18 21:30ProFTPD mod_sftp contains a heap-based buffer overflow reachable by an authenticated SFTP user. The fxp_packet_read() function accepts the attacker-supplied 32-bit big-endian SFTP packet length without a minimum sanity check. A value of 0 causes an unsigned subtraction elsewhere in the read path to underflow to approximately 4 GB. That oversized request reaches the core memory allocator, where the rounded size is computed in size_t but passed to new_block() as a 32-bit int; the low 32 bits of 0x100000000 are 0, so new_block() returns a small (~512-byte) block while the caller is told it received ~4 GB. The subsequent fill loop then streams attacker-controlled bytes past the end of the 544-byte allocation, producing an attacker-controlled heap buffer overflow. An authenticated user can crash the per-connection ProFTPD session child on demand with a single malformed SFTP packet (packet_len=0 followed by a body greater than approximately 544 bytes), producing reliable authenticated remote denial of service. Depending on heap layout and adjacent allocations, heap metadata corruption and further consequences beyond denial of service may be possible, though only denial of service is demonstrated by the supplied proof of concept.
{
"affected": [],
"aliases": [
"CVE-2026-53994"
],
"database_specific": {
"cwe_ids": [
"CWE-122"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2026-07-18T20:17:30Z",
"severity": "HIGH"
},
"details": "ProFTPD mod_sftp contains a heap-based buffer overflow reachable by an authenticated SFTP user. The fxp_packet_read() function accepts the attacker-supplied 32-bit big-endian SFTP packet length without a minimum sanity check. A value of 0 causes an unsigned subtraction elsewhere in the read path to underflow to approximately 4 GB. That oversized request reaches the core memory allocator, where the rounded size is computed in size_t but passed to new_block() as a 32-bit int; the low 32 bits of 0x100000000 are 0, so new_block() returns a small (~512-byte) block while the caller is told it received ~4 GB. The subsequent fill loop then streams attacker-controlled bytes past the end of the 544-byte allocation, producing an attacker-controlled heap buffer overflow. An authenticated user can crash the per-connection ProFTPD session child on demand with a single malformed SFTP packet (packet_len=0 followed by a body greater than approximately 544 bytes), producing reliable authenticated remote denial of service. Depending on heap layout and adjacent allocations, heap metadata corruption and further consequences beyond denial of service may be possible, though only denial of service is demonstrated by the supplied proof of concept.",
"id": "GHSA-435f-wcrw-9x3x",
"modified": "2026-07-18T21:30:24Z",
"published": "2026-07-18T21:30:24Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-53994"
},
{
"type": "WEB",
"url": "https://github.com/proftpd/proftpd/commit/7342836fa98e36209660a4c5805c801476f63936"
},
{
"type": "WEB",
"url": "https://github.com/proftpd/proftpd"
},
{
"type": "WEB",
"url": "https://www.vulncheck.com/advisories/proftpd-mod-sftp-heap-buffer-overflow-via-unsigned-integer-underflow-and-size-truncation"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H",
"type": "CVSS_V3"
},
{
"score": "CVSS:4.0/AV:N/AC:H/AT:N/PR:L/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-43FM-JFR6-895R
Vulnerability from github – Published: 2026-09-08 18:33 – Updated: 2026-09-08 18:33Heap-based buffer overflow in Windows NTFS allows an authorized attacker to elevate privileges locally.
{
"affected": [],
"aliases": [
"CVE-2026-83995"
],
"database_specific": {
"cwe_ids": [
"CWE-122"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2026-09-08T18:21:10Z",
"severity": "HIGH"
},
"details": "Heap-based buffer overflow in Windows NTFS allows an authorized attacker to elevate privileges locally.",
"id": "GHSA-43fm-jfr6-895r",
"modified": "2026-09-08T18:33:38Z",
"published": "2026-09-08T18:33:38Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-83995"
},
{
"type": "WEB",
"url": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-83995"
}
],
"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-4425-9M6F-3PPG
Vulnerability from github – Published: 2024-04-26 15:30 – Updated: 2024-08-01 15:31Buffer Overflow vulnerability in Ffmpeg v.N113007-g8d24a28d06 allows a local attacker to execute arbitrary code via the libavfilter/af_stereowiden.c:120:69.
{
"affected": [],
"aliases": [
"CVE-2023-51794"
],
"database_specific": {
"cwe_ids": [
"CWE-122"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2024-04-26T15:15:48Z",
"severity": "HIGH"
},
"details": "Buffer Overflow vulnerability in Ffmpeg v.N113007-g8d24a28d06 allows a local attacker to execute arbitrary code via the libavfilter/af_stereowiden.c:120:69.",
"id": "GHSA-4425-9m6f-3ppg",
"modified": "2024-08-01T15:31:42Z",
"published": "2024-04-26T15:30:33Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2023-51794"
},
{
"type": "WEB",
"url": "https://trac.ffmpeg.org/ticket/10746"
}
],
"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-444Q-2G28-Q4RW
Vulnerability from github – Published: 2026-09-08 18:32 – Updated: 2026-09-08 18:32Heap-based buffer overflow in Microsoft Local Security Authority Server (lsasrv) allows an authorized attacker to elevate privileges locally.
{
"affected": [],
"aliases": [
"CVE-2026-69594"
],
"database_specific": {
"cwe_ids": [
"CWE-122"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2026-09-08T18:19:29Z",
"severity": "HIGH"
},
"details": "Heap-based buffer overflow in Microsoft Local Security Authority Server (lsasrv) allows an authorized attacker to elevate privileges locally.",
"id": "GHSA-444q-2g28-q4rw",
"modified": "2026-09-08T18:32:47Z",
"published": "2026-09-08T18:32:47Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-69594"
},
{
"type": "WEB",
"url": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-69594"
}
],
"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"
}
]
}
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.