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-V683-VQVC-9WVQ
Vulnerability from github – Published: 2022-05-24 17:33 – Updated: 2022-05-24 17:33Acrobat Reader DC versions 2020.012.20048 (and earlier), 2020.001.30005 (and earlier) and 2017.011.30175 (and earlier) are affected by a heap-based buffer overflow vulnerability in the submitForm function, potentially resulting in arbitrary code execution in the context of the current user. Exploitation requires user interaction in that a victim must open a crafted .pdf file in Acrobat Reader.
{
"affected": [],
"aliases": [
"CVE-2020-24435"
],
"database_specific": {
"cwe_ids": [
"CWE-122"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2020-11-05T20:15:00Z",
"severity": "HIGH"
},
"details": "Acrobat Reader DC versions 2020.012.20048 (and earlier), 2020.001.30005 (and earlier) and 2017.011.30175 (and earlier) are affected by a heap-based buffer overflow vulnerability in the submitForm function, potentially resulting in arbitrary code execution in the context of the current user. Exploitation requires user interaction in that a victim must open a crafted .pdf file in Acrobat Reader.",
"id": "GHSA-v683-vqvc-9wvq",
"modified": "2022-05-24T17:33:13Z",
"published": "2022-05-24T17:33:13Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2020-24435"
},
{
"type": "WEB",
"url": "https://helpx.adobe.com/security/products/acrobat/apsb20-67.html"
},
{
"type": "WEB",
"url": "https://www.talosintelligence.com/vulnerability_reports/TALOS-2020-1157"
}
],
"schema_version": "1.4.0",
"severity": []
}
GHSA-V694-R254-M866
Vulnerability from github – Published: 2022-03-25 00:00 – Updated: 2022-04-01 00:00Heap Buffer Overflow in iterate_chained_fixups in GitHub repository radareorg/radare2 prior to 5.6.6.
{
"affected": [],
"aliases": [
"CVE-2022-1052"
],
"database_specific": {
"cwe_ids": [
"CWE-122",
"CWE-125",
"CWE-787"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2022-03-24T13:15:00Z",
"severity": "MODERATE"
},
"details": "Heap Buffer Overflow in iterate_chained_fixups in GitHub repository radareorg/radare2 prior to 5.6.6.",
"id": "GHSA-v694-r254-m866",
"modified": "2022-04-01T00:00:55Z",
"published": "2022-03-25T00:00:34Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2022-1052"
},
{
"type": "WEB",
"url": "https://github.com/radareorg/radare2/commit/0052500c1ed5bf8263b26b9fd7773dbdc6f170c4"
},
{
"type": "WEB",
"url": "https://huntr.dev/bounties/3b3b7f77-ab8d-4de3-999b-eeec0a3eebe7"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
"type": "CVSS_V3"
}
]
}
GHSA-V6C6-GCWR-P5PM
Vulnerability from github – Published: 2022-07-20 00:00 – Updated: 2022-07-27 00:00DOS / potential heap overwrite in mkv demuxing using HEADERSTRIP decompression. Integer overflow in matroskaparse element in gst_matroska_decompress_data function which causes a heap overflow. Due to restrictions on chunk sizes in the matroskademux element, the overflow can't be triggered, however the matroskaparse element has no size checks.
{
"affected": [],
"aliases": [
"CVE-2022-1925"
],
"database_specific": {
"cwe_ids": [
"CWE-122",
"CWE-190",
"CWE-787"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2022-07-19T20:15:00Z",
"severity": "HIGH"
},
"details": "DOS / potential heap overwrite in mkv demuxing using HEADERSTRIP decompression. Integer overflow in matroskaparse element in gst_matroska_decompress_data function which causes a heap overflow. Due to restrictions on chunk sizes in the matroskademux element, the overflow can\u0027t be triggered, however the matroskaparse element has no size checks.",
"id": "GHSA-v6c6-gcwr-p5pm",
"modified": "2022-07-27T00:00:31Z",
"published": "2022-07-20T00:00:18Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2022-1925"
},
{
"type": "WEB",
"url": "https://gitlab.freedesktop.org/gstreamer/gstreamer/-/issues/1225"
},
{
"type": "WEB",
"url": "https://lists.debian.org/debian-lts-announce/2022/08/msg00001.html"
},
{
"type": "WEB",
"url": "https://www.debian.org/security/2022/dsa-5204"
}
],
"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-V6M7-JPJM-GVWJ
Vulnerability from github – Published: 2025-08-12 18:31 – Updated: 2025-08-12 18:31Heap-based buffer overflow in Windows GDI+ allows an unauthorized attacker to execute code over a network.
{
"affected": [],
"aliases": [
"CVE-2025-53766"
],
"database_specific": {
"cwe_ids": [
"CWE-122"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2025-08-12T18:15:45Z",
"severity": "CRITICAL"
},
"details": "Heap-based buffer overflow in Windows GDI+ allows an unauthorized attacker to execute code over a network.",
"id": "GHSA-v6m7-jpjm-gvwj",
"modified": "2025-08-12T18:31:33Z",
"published": "2025-08-12T18:31:33Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2025-53766"
},
{
"type": "WEB",
"url": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-53766"
}
],
"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-V6P2-MJH5-MVPM
Vulnerability from github – Published: 2026-04-02 18:31 – Updated: 2026-04-06 21:31A heap-based buffer overflow vulnerability was identified in TP-Link Tapo C520WS v2.6 in the HTTP POST body parsing logic due to missing validation of remaining buffer capacity after dynamic allocation, due to insufficient boundary validation when handling externally supplied HTTP input. An attacker on the same network segment could trigger heap memory corruption conditions by sending crafted payloads that cause write operations beyond allocated buffer boundaries. Successful exploitation causes a Denial-of-Service (DoS) condition, causing the device’s process to crash or become unresponsive.
{
"affected": [],
"aliases": [
"CVE-2026-34118"
],
"database_specific": {
"cwe_ids": [
"CWE-122"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2026-04-02T18:16:28Z",
"severity": "HIGH"
},
"details": "A heap-based buffer overflow vulnerability was identified in TP-Link Tapo C520WS v2.6\u00a0in the HTTP POST body parsing logic due to missing validation of remaining buffer capacity after dynamic allocation, due to\u00a0insufficient boundary validation when handling externally supplied HTTP input.\u00a0\u00a0An attacker\non the same network segment could trigger heap memory corruption conditions by\nsending crafted payloads that cause write operations beyond allocated buffer\nboundaries.\u00a0 Successful exploitation\ncauses a Denial-of-Service (DoS) condition, causing the device\u2019s process to\ncrash or become unresponsive.",
"id": "GHSA-v6p2-mjh5-mvpm",
"modified": "2026-04-06T21:31:33Z",
"published": "2026-04-02T18:31:38Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-34118"
},
{
"type": "WEB",
"url": "https://www.tp-link.com/en/support/download/tapo-c520ws/#Firmware-Release-Notes"
},
{
"type": "WEB",
"url": "https://www.tp-link.com/us/support/download/tapo-c520ws/#Firmware-Release-Notes"
},
{
"type": "WEB",
"url": "https://www.tp-link.com/us/support/faq/5047"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
"type": "CVSS_V3"
},
{
"score": "CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/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-V6W6-862C-C8MM
Vulnerability from github – Published: 2025-05-07 09:31 – Updated: 2025-05-07 09:31An Heap-based Buffer Overflow in RT-Labs P-Net version 1.0.1 or earlier allows an attacker to induce a crash in IO devices that use the library by sending a malicious RPC packet.
{
"affected": [],
"aliases": [
"CVE-2025-32397"
],
"database_specific": {
"cwe_ids": [
"CWE-122",
"CWE-787"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2025-05-07T07:15:50Z",
"severity": "HIGH"
},
"details": "An Heap-based Buffer Overflow in RT-Labs P-Net version 1.0.1 or earlier allows an attacker to induce a crash in IO devices that use the library by sending a malicious RPC packet.",
"id": "GHSA-v6w6-862c-c8mm",
"modified": "2025-05-07T09:31:17Z",
"published": "2025-05-07T09:31:17Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2025-32397"
},
{
"type": "WEB",
"url": "https://www.nozominetworks.com/labs/vulnerability-advisories-cve-2025-32397"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
"type": "CVSS_V3"
}
]
}
GHSA-V6XJ-8RHX-W2R4
Vulnerability from github – Published: 2025-01-14 18:32 – Updated: 2025-01-14 18:32Windows Telephony Service Remote Code Execution Vulnerability
{
"affected": [],
"aliases": [
"CVE-2025-21273"
],
"database_specific": {
"cwe_ids": [
"CWE-122"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2025-01-14T18:15:47Z",
"severity": "HIGH"
},
"details": "Windows Telephony Service Remote Code Execution Vulnerability",
"id": "GHSA-v6xj-8rhx-w2r4",
"modified": "2025-01-14T18:32:03Z",
"published": "2025-01-14T18:32:03Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2025-21273"
},
{
"type": "WEB",
"url": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-21273"
}
],
"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-V76X-QFMC-M88P
Vulnerability from github – Published: 2023-08-02 06:30 – Updated: 2023-12-15 18:30Under some circumstances, this weakness allows a user who has access to run the “ps” utility on a machine, the ability to write almost unlimited amounts of unfiltered data into the process heap.
{
"affected": [],
"aliases": [
"CVE-2023-4016"
],
"database_specific": {
"cwe_ids": [
"CWE-122",
"CWE-787"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2023-08-02T05:15:09Z",
"severity": "LOW"
},
"details": "Under some circumstances, this weakness allows a user who has access to run the \u201cps\u201d utility on a machine, the ability to write almost unlimited amounts of unfiltered data into the process heap.",
"id": "GHSA-v76x-qfmc-m88p",
"modified": "2023-12-15T18:30:27Z",
"published": "2023-08-02T06:30:20Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2023-4016"
},
{
"type": "WEB",
"url": "https://gitlab.com/procps-ng/procps"
},
{
"type": "WEB",
"url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/SUETRRT24OFGPYK6ACPM5VUGHNKH5CQ5"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:L",
"type": "CVSS_V3"
}
]
}
GHSA-V778-GJXX-9MJP
Vulnerability from github – Published: 2024-03-27 03:31 – Updated: 2025-11-04 21:31A heap buffer overflow occurs in the dfs_v2 romfs filesystem RT-Thread through 5.0.2.
{
"affected": [],
"aliases": [
"CVE-2024-24335"
],
"database_specific": {
"cwe_ids": [
"CWE-122"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2024-03-27T03:15:11Z",
"severity": "HIGH"
},
"details": "A heap buffer overflow occurs in the dfs_v2 romfs filesystem RT-Thread through 5.0.2.",
"id": "GHSA-v778-gjxx-9mjp",
"modified": "2025-11-04T21:31:21Z",
"published": "2024-03-27T03:31:17Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2024-24335"
},
{
"type": "WEB",
"url": "https://github.com/RT-Thread/rt-thread/issues/8271"
},
{
"type": "WEB",
"url": "https://github.com/RT-Thread/rt-thread/pull/8278"
},
{
"type": "WEB",
"url": "https://github.com/hnsecurity/vulns/blob/main/HNS-2024-05-rt-thread.txt"
},
{
"type": "WEB",
"url": "https://seclists.org/fulldisclosure/2024/Mar/28"
},
{
"type": "WEB",
"url": "https://security.humanativaspa.it/multiple-vulnerabilities-in-rt-thread-rtos"
},
{
"type": "WEB",
"url": "http://seclists.org/fulldisclosure/2024/Mar/28"
},
{
"type": "WEB",
"url": "http://www.openwall.com/lists/oss-security/2024/03/05/1"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
"type": "CVSS_V3"
}
]
}
GHSA-V79P-VGMV-RCC2
Vulnerability from github – Published: 2026-07-14 18:32 – Updated: 2026-07-14 18:32Integer overflow or wraparound in Microsoft Office Word allows an unauthorized attacker to execute code locally.
{
"affected": [],
"aliases": [
"CVE-2026-55033"
],
"database_specific": {
"cwe_ids": [
"CWE-122"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2026-07-14T18:18:14Z",
"severity": "HIGH"
},
"details": "Integer overflow or wraparound in Microsoft Office Word allows an unauthorized attacker to execute code locally.",
"id": "GHSA-v79p-vgmv-rcc2",
"modified": "2026-07-14T18:32:32Z",
"published": "2026-07-14T18:32:32Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-55033"
},
{
"type": "WEB",
"url": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-55033"
}
],
"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
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.