Common Weakness Enumeration
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().
5392 vulnerabilities reference this CWE, most recent first.
GHSA-R5G6-FH99-XRR6
Vulnerability from github – Published: 2022-05-09 00:00 – Updated: 2022-05-17 00:00
VLAI
Details
Heap-based Buffer Overflow in function cmdline_erase_chars in GitHub repository vim/vim prior to 8.2. This vulnerabilities are capable of crashing software, modify memory, and possible remote execution
Severity
7.8 (High)
{
"affected": [],
"aliases": [
"CVE-2022-1619"
],
"database_specific": {
"cwe_ids": [
"CWE-122",
"CWE-787"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2022-05-08T10:15:00Z",
"severity": "HIGH"
},
"details": "Heap-based Buffer Overflow in function cmdline_erase_chars in GitHub repository vim/vim prior to 8.2. This vulnerabilities are capable of crashing software, modify memory, and possible remote execution",
"id": "GHSA-r5g6-fh99-xrr6",
"modified": "2022-05-17T00:00:32Z",
"published": "2022-05-09T00:00:51Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2022-1619"
},
{
"type": "WEB",
"url": "https://github.com/vim/vim/commit/ef02f16609ff0a26ffc6e20263523424980898fe"
},
{
"type": "WEB",
"url": "https://huntr.dev/bounties/b3200483-624e-4c76-a070-e246f62a7450"
},
{
"type": "WEB",
"url": "https://lists.debian.org/debian-lts-announce/2022/05/msg00022.html"
},
{
"type": "WEB",
"url": "https://lists.debian.org/debian-lts-announce/2022/11/msg00032.html"
},
{
"type": "WEB",
"url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/A6BY5P7ERZS7KXSBCGFCOXLMLGWUUJIH"
},
{
"type": "WEB",
"url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/HIP7KG7TVS5YF3QREAY2GOGUT3YUBZAI"
},
{
"type": "WEB",
"url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/JUN33257RUM4RS2I4GZETKFSAXPETATG"
},
{
"type": "WEB",
"url": "https://security.gentoo.org/glsa/202208-32"
},
{
"type": "WEB",
"url": "https://security.gentoo.org/glsa/202305-16"
},
{
"type": "WEB",
"url": "https://security.netapp.com/advisory/ntap-20220930-0007"
},
{
"type": "WEB",
"url": "https://support.apple.com/kb/HT213488"
},
{
"type": "WEB",
"url": "http://seclists.org/fulldisclosure/2022/Oct/28"
},
{
"type": "WEB",
"url": "http://seclists.org/fulldisclosure/2022/Oct/41"
}
],
"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-R5XG-XH8M-9Q2W
Vulnerability from github – Published: 2026-09-16 09:30 – Updated: 2026-09-23 21:30
VLAI
Details
In NLnet Labs Unbound up to and including 1.26.0, a vulnerability was found in that can progressively corrupt heap memory and under certain systems and compilation options could lead to remote code execution. The vulnerability starts when CNAME synthesis during an upstream response needs to enforce(rewrite) a max TTL value in the packet buffer. Coupled with a compression pointer that points to the overwritten value and invalidates the domain name, it leads to an error path that does not properly move the buffer position and allows for the heap buffer overflow. Since this is heavily reliant on heap memory layout, results are memory corruption that eventually leads to a crash and under specific systems and compilation options remote code execution.
Severity
{
"affected": [],
"aliases": [
"CVE-2026-82717"
],
"database_specific": {
"cwe_ids": [
"CWE-122"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2026-09-16T09:17:06Z",
"severity": "HIGH"
},
"details": "In NLnet Labs Unbound up to and including 1.26.0, a vulnerability was found in that can progressively corrupt heap memory and under certain systems and compilation options could lead to remote code execution. The vulnerability starts when CNAME synthesis during an upstream response needs to enforce(rewrite) a max TTL value in the packet buffer. Coupled with a compression pointer that points to the overwritten value and invalidates the domain name, it leads to an error path that does not properly move the buffer position and allows for the heap buffer overflow. Since this is heavily reliant on heap memory layout, results are memory corruption that eventually leads to a crash and under specific systems and compilation options remote code execution.",
"id": "GHSA-r5xg-xh8m-9q2w",
"modified": "2026-09-23T21:30:29Z",
"published": "2026-09-16T09:30:28Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-82717"
},
{
"type": "WEB",
"url": "https://www.nlnetlabs.nl/downloads/unbound/CVE-2026-82717.txt"
}
],
"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:H/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/E:U/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-R6CG-GW4P-5GMJ
Vulnerability from github – Published: 2024-09-11 15:31 – Updated: 2024-09-12 15:33
VLAI
Details
Heap buffer overflow in Skia in Google Chrome prior to 128.0.6613.137 allowed a remote attacker to potentially exploit heap corruption via a crafted HTML page. (Chromium security severity: High)
Severity
8.8 (High)
{
"affected": [],
"aliases": [
"CVE-2024-8636"
],
"database_specific": {
"cwe_ids": [
"CWE-122",
"CWE-416",
"CWE-787"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2024-09-11T14:15:13Z",
"severity": "HIGH"
},
"details": "Heap buffer overflow in Skia in Google Chrome prior to 128.0.6613.137 allowed a remote attacker to potentially exploit heap corruption via a crafted HTML page. (Chromium security severity: High)",
"id": "GHSA-r6cg-gw4p-5gmj",
"modified": "2024-09-12T15:33:00Z",
"published": "2024-09-11T15:31:12Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2024-8636"
},
{
"type": "WEB",
"url": "https://chromereleases.googleblog.com/2024/09/stable-channel-update-for-desktop_10.html"
},
{
"type": "WEB",
"url": "https://issues.chromium.org/issues/361461526"
}
],
"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-R6H3-3Q3X-3WCR
Vulnerability from github – Published: 2022-05-14 01:15 – Updated: 2022-05-14 01:15
VLAI
Details
The xmlNextChar function in libxml2 before 2.9.4 allows remote attackers to cause a denial of service (heap-based buffer over-read) via a crafted XML document.
Severity
8.1 (High)
{
"affected": [],
"aliases": [
"CVE-2016-1762"
],
"database_specific": {
"cwe_ids": [
"CWE-119",
"CWE-122"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2016-03-24T01:59:00Z",
"severity": "HIGH"
},
"details": "The xmlNextChar function in libxml2 before 2.9.4 allows remote attackers to cause a denial of service (heap-based buffer over-read) via a crafted XML document.",
"id": "GHSA-r6h3-3q3x-3wcr",
"modified": "2022-05-14T01:15:23Z",
"published": "2022-05-14T01:15:23Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2016-1762"
},
{
"type": "WEB",
"url": "https://access.redhat.com/errata/RHSA-2016:1292"
},
{
"type": "WEB",
"url": "https://bugzilla.gnome.org/show_bug.cgi?id=759671"
},
{
"type": "WEB",
"url": "https://git.gnome.org/browse/libxml2/commit/?id=a7a94612aa3b16779e2c74e1fa353b5d9786c602"
},
{
"type": "WEB",
"url": "https://kc.mcafee.com/corporate/index?page=content\u0026id=SB10170"
},
{
"type": "WEB",
"url": "https://support.apple.com/HT206166"
},
{
"type": "WEB",
"url": "https://support.apple.com/HT206167"
},
{
"type": "WEB",
"url": "https://support.apple.com/HT206168"
},
{
"type": "WEB",
"url": "https://support.apple.com/HT206169"
},
{
"type": "WEB",
"url": "https://support.apple.com/HT206171"
},
{
"type": "WEB",
"url": "https://www.debian.org/security/2016/dsa-3593"
},
{
"type": "WEB",
"url": "http://lists.apple.com/archives/security-announce/2016/Mar/msg00000.html"
},
{
"type": "WEB",
"url": "http://lists.apple.com/archives/security-announce/2016/Mar/msg00001.html"
},
{
"type": "WEB",
"url": "http://lists.apple.com/archives/security-announce/2016/Mar/msg00002.html"
},
{
"type": "WEB",
"url": "http://lists.apple.com/archives/security-announce/2016/Mar/msg00004.html"
},
{
"type": "WEB",
"url": "http://lists.apple.com/archives/security-announce/2016/Mar/msg00005.html"
},
{
"type": "WEB",
"url": "http://rhn.redhat.com/errata/RHSA-2016-2957.html"
},
{
"type": "WEB",
"url": "http://www.oracle.com/technetwork/topics/security/linuxbulletinjul2016-3090544.html"
},
{
"type": "WEB",
"url": "http://www.oracle.com/technetwork/topics/security/ovmbulletinjul2016-3090546.html"
},
{
"type": "WEB",
"url": "http://www.securityfocus.com/bid/85059"
},
{
"type": "WEB",
"url": "http://www.securitytracker.com/id/1035353"
},
{
"type": "WEB",
"url": "http://www.ubuntu.com/usn/USN-2994-1"
},
{
"type": "WEB",
"url": "http://xmlsoft.org/news.html"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:H",
"type": "CVSS_V3"
}
]
}
GHSA-R6J7-F2G3-33M3
Vulnerability from github – Published: 2024-10-08 18:33 – Updated: 2024-10-08 18:33
VLAI
Details
Windows Routing and Remote Access Service (RRAS) Remote Code Execution Vulnerability
Severity
8.8 (High)
{
"affected": [],
"aliases": [
"CVE-2024-43611"
],
"database_specific": {
"cwe_ids": [
"CWE-122"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2024-10-08T18:15:29Z",
"severity": "HIGH"
},
"details": "Windows Routing and Remote Access Service (RRAS) Remote Code Execution Vulnerability",
"id": "GHSA-r6j7-f2g3-33m3",
"modified": "2024-10-08T18:33:17Z",
"published": "2024-10-08T18:33:17Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2024-43611"
},
{
"type": "WEB",
"url": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2024-43611"
}
],
"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-R6QG-CJ8H-F89V
Vulnerability from github – Published: 2026-09-08 18:32 – Updated: 2026-09-08 18:32
VLAI
Details
Heap-based buffer overflow in SQL Server allows an authorized attacker to execute code over a network.
Severity
8.8 (High)
{
"affected": [],
"aliases": [
"CVE-2026-67643"
],
"database_specific": {
"cwe_ids": [
"CWE-122"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2026-09-08T18:18:24Z",
"severity": "HIGH"
},
"details": "Heap-based buffer overflow in SQL Server allows an authorized attacker to execute code over a network.",
"id": "GHSA-r6qg-cj8h-f89v",
"modified": "2026-09-08T18:32:11Z",
"published": "2026-09-08T18:32:11Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-67643"
},
{
"type": "WEB",
"url": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-67643"
}
],
"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-R79C-6HF5-2JJX
Vulnerability from github – Published: 2021-12-02 00:00 – Updated: 2025-11-03 21:30
VLAI
Details
vim is vulnerable to Heap-based Buffer Overflow
Severity
7.8 (High)
{
"affected": [],
"aliases": [
"CVE-2021-4019"
],
"database_specific": {
"cwe_ids": [
"CWE-122",
"CWE-787"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2021-12-01T10:15:00Z",
"severity": "HIGH"
},
"details": "vim is vulnerable to Heap-based Buffer Overflow",
"id": "GHSA-r79c-6hf5-2jjx",
"modified": "2025-11-03T21:30:36Z",
"published": "2021-12-02T00:00:51Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2021-4019"
},
{
"type": "WEB",
"url": "https://github.com/vim/vim/commit/bd228fd097b41a798f90944b5d1245eddd484142"
},
{
"type": "WEB",
"url": "https://huntr.dev/bounties/d8798584-a6c9-4619-b18f-001b9a6fca92"
},
{
"type": "WEB",
"url": "https://lists.debian.org/debian-lts-announce/2022/03/msg00018.html"
},
{
"type": "WEB",
"url": "https://lists.debian.org/debian-lts-announce/2022/11/msg00009.html"
},
{
"type": "WEB",
"url": "https://lists.debian.org/debian-lts-announce/2025/03/msg00023.html"
},
{
"type": "WEB",
"url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/DRPAI5JVZLI7WHWSBR6NWAPBQAYUQREW"
},
{
"type": "WEB",
"url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/FNXY7T5OORA7UJIMGSJBGHFMU6UZWS6P"
},
{
"type": "WEB",
"url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/DRPAI5JVZLI7WHWSBR6NWAPBQAYUQREW"
},
{
"type": "WEB",
"url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/FNXY7T5OORA7UJIMGSJBGHFMU6UZWS6P"
},
{
"type": "WEB",
"url": "https://security.gentoo.org/glsa/202208-32"
},
{
"type": "WEB",
"url": "http://www.openwall.com/lists/oss-security/2022/01/15/1"
}
],
"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-R7P6-R9PV-H9XV
Vulnerability from github – Published: 2026-09-08 21:34 – Updated: 2026-09-09 15:34
VLAI
Details
In multiple locations, there is a possible memory safety issue due to integer overflow. This could lead to local escalation of privilege with no additional execution privileges required.
Severity
7.8 (High)
{
"affected": [],
"aliases": [
"CVE-2026-58820"
],
"database_specific": {
"cwe_ids": [
"CWE-122"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2026-09-08T19:18:02Z",
"severity": "HIGH"
},
"details": "In multiple locations, there is a possible memory safety issue due to integer overflow. This could lead to local escalation of privilege with no additional execution privileges required.",
"id": "GHSA-r7p6-r9pv-h9xv",
"modified": "2026-09-09T15:34:51Z",
"published": "2026-09-08T21:34:16Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-58820"
},
{
"type": "WEB",
"url": "https://source.android.com/docs/security/bulletin/2026/2026-09-01"
}
],
"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-R86X-6JG5-MM45
Vulnerability from github – Published: 2022-07-09 00:00 – Updated: 2022-07-21 00:00
VLAI
Details
Heap-based Buffer Overflow in GitHub repository vim/vim prior to 9.0.0044.
Severity
7.8 (High)
{
"affected": [],
"aliases": [
"CVE-2022-2343"
],
"database_specific": {
"cwe_ids": [
"CWE-122"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2022-07-08T18:15:00Z",
"severity": "HIGH"
},
"details": "Heap-based Buffer Overflow in GitHub repository vim/vim prior to 9.0.0044.",
"id": "GHSA-r86x-6jg5-mm45",
"modified": "2022-07-21T00:00:28Z",
"published": "2022-07-09T00:00:22Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2022-2343"
},
{
"type": "WEB",
"url": "https://github.com/vim/vim/commit/caea66442d86e7bbba3bf3dc202c3c0d549b9853"
},
{
"type": "WEB",
"url": "https://huntr.dev/bounties/2ecb4345-2fc7-4e7f-adb0-83a20bb458f5"
},
{
"type": "WEB",
"url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/43Y3VJPOTTY3NTREDIFUPITM2POG4ZLP"
},
{
"type": "WEB",
"url": "https://security.gentoo.org/glsa/202208-32"
},
{
"type": "WEB",
"url": "https://security.gentoo.org/glsa/202305-16"
}
],
"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-R88J-3C36-8P3P
Vulnerability from github – Published: 2025-07-08 18:31 – Updated: 2025-07-08 18:31
VLAI
Details
Heap-based buffer overflow in Windows Routing and Remote Access Service (RRAS) allows an unauthorized attacker to execute code over a network.
Severity
8.8 (High)
{
"affected": [],
"aliases": [
"CVE-2025-49669"
],
"database_specific": {
"cwe_ids": [
"CWE-122"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2025-07-08T17:15:50Z",
"severity": "HIGH"
},
"details": "Heap-based buffer overflow in Windows Routing and Remote Access Service (RRAS) allows an unauthorized attacker to execute code over a network.",
"id": "GHSA-r88j-3c36-8p3p",
"modified": "2025-07-08T18:31:46Z",
"published": "2025-07-08T18:31:46Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2025-49669"
},
{
"type": "WEB",
"url": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-49669"
}
],
"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
Architecture and Design
Use an abstraction library to abstract away risky APIs. Not a complete solution.
Mitigation MIT-10
Operation
Build and Compilation
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
Operation
Build and Compilation
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
Implementation
Implement and perform bounds checking on input.
Mitigation
Implementation
Strategy: Libraries or Frameworks
Do not use dangerous functions such as gets. Look for their safe equivalent, which checks for the boundary.
Mitigation
Operation
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.