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-P6JF-PV8C-623C
Vulnerability from github – Published: 2025-04-13 15:30 – Updated: 2025-10-16 15:30A heap buffer overflow vulnerability was discovered in Perl.
When there are non-ASCII bytes in the left-hand-side of the tr operator, S_do_trans_invmap can overflow the destination pointer d.
$ perl -e '$_ = "\x{FF}" x 1000000; tr/\xFF/\x{100}/;' Segmentation fault (core dumped)
It is believed that this vulnerability can enable Denial of Service and possibly Code Execution attacks on platforms that lack sufficient defenses.
{
"affected": [],
"aliases": [
"CVE-2024-56406"
],
"database_specific": {
"cwe_ids": [
"CWE-122",
"CWE-787"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2025-04-13T14:15:14Z",
"severity": "HIGH"
},
"details": "A heap buffer overflow vulnerability was discovered in Perl. \n\nWhen there are non-ASCII bytes in the left-hand-side of the `tr` operator, `S_do_trans_invmap` can overflow the destination pointer `d`.\n\n\u00a0 \u00a0$ perl -e \u0027$_ = \"\\x{FF}\" x 1000000; tr/\\xFF/\\x{100}/;\u0027 \n\u00a0 \u00a0Segmentation fault (core dumped)\n\nIt is believed that this vulnerability can enable Denial of Service and possibly Code Execution attacks on platforms that lack sufficient defenses.",
"id": "GHSA-p6jf-pv8c-623c",
"modified": "2025-10-16T15:30:26Z",
"published": "2025-04-13T15:30:21Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2024-56406"
},
{
"type": "WEB",
"url": "https://github.com/Perl/perl5/commit/87f42aa0e0096e9a346c9672aa3a0bd3bef8c1dd.patch"
},
{
"type": "WEB",
"url": "https://metacpan.org/release/SHAY/perl-5.38.4/changes"
},
{
"type": "WEB",
"url": "https://metacpan.org/release/SHAY/perl-5.40.2/changes"
},
{
"type": "WEB",
"url": "http://www.openwall.com/lists/oss-security/2025/04/13/3"
},
{
"type": "WEB",
"url": "http://www.openwall.com/lists/oss-security/2025/04/13/4"
},
{
"type": "WEB",
"url": "http://www.openwall.com/lists/oss-security/2025/04/13/5"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:H",
"type": "CVSS_V3"
}
]
}
GHSA-P6P6-5FQR-X4HG
Vulnerability from github – Published: 2026-07-14 18:32 – Updated: 2026-07-14 18:32Heap-based buffer overflow in Windows NTFS allows an authorized attacker to execute code locally.
{
"affected": [],
"aliases": [
"CVE-2026-58640"
],
"database_specific": {
"cwe_ids": [
"CWE-122"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2026-07-14T17:17:14Z",
"severity": "HIGH"
},
"details": "Heap-based buffer overflow in Windows NTFS allows an authorized attacker to execute code locally.",
"id": "GHSA-p6p6-5fqr-x4hg",
"modified": "2026-07-14T18:32:13Z",
"published": "2026-07-14T18:32:13Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-58640"
},
{
"type": "WEB",
"url": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-58640"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H",
"type": "CVSS_V3"
}
]
}
GHSA-P6RW-7V7M-XM65
Vulnerability from github – Published: 2024-04-09 18:30 – Updated: 2024-04-09 18:30Microsoft OLE DB Driver for SQL Server Remote Code Execution Vulnerability
{
"affected": [],
"aliases": [
"CVE-2024-28914"
],
"database_specific": {
"cwe_ids": [
"CWE-122"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2024-04-09T17:15:51Z",
"severity": "HIGH"
},
"details": "Microsoft OLE DB Driver for SQL Server Remote Code Execution Vulnerability",
"id": "GHSA-p6rw-7v7m-xm65",
"modified": "2024-04-09T18:30:27Z",
"published": "2024-04-09T18:30:27Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2024-28914"
},
{
"type": "WEB",
"url": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2024-28914"
}
],
"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-P6RW-GVVH-Q8V4
Vulnerability from github – Published: 2024-01-31 15:30 – Updated: 2026-05-12 12:31A heap-based buffer overflow was found in the __vsyslog_internal function of the glibc library. This function is called by the syslog and vsyslog functions. This issue occurs when the openlog function was not called, or called with the ident argument set to NULL, and the program name (the basename of argv[0]) is bigger than 1024 bytes, resulting in an application crash or local privilege escalation. This issue affects glibc 2.36 and newer.
{
"affected": [],
"aliases": [
"CVE-2023-6246"
],
"database_specific": {
"cwe_ids": [
"CWE-122",
"CWE-787"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2024-01-31T14:15:48Z",
"severity": "HIGH"
},
"details": "A heap-based buffer overflow was found in the __vsyslog_internal function of the glibc library. This function is called by the syslog and vsyslog functions. This issue occurs when the openlog function was not called, or called with the ident argument set to NULL, and the program name (the basename of argv[0]) is bigger than 1024 bytes, resulting in an application crash or local privilege escalation. This issue affects glibc 2.36 and newer.",
"id": "GHSA-p6rw-gvvh-q8v4",
"modified": "2026-05-12T12:31:34Z",
"published": "2024-01-31T15:30:20Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2023-6246"
},
{
"type": "WEB",
"url": "https://access.redhat.com/security/cve/CVE-2023-6246"
},
{
"type": "WEB",
"url": "https://bugzilla.redhat.com/show_bug.cgi?id=2249053"
},
{
"type": "WEB",
"url": "https://cert-portal.siemens.com/productcert/html/ssa-082556.html"
},
{
"type": "WEB",
"url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/D2FIH77VHY3KCRROCXOT6L27WMZXSJ2G"
},
{
"type": "WEB",
"url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/MWQ6BZJ6CV5UAW4VZSKJ6TO4KIW2KWAQ"
},
{
"type": "WEB",
"url": "https://security.gentoo.org/glsa/202402-01"
},
{
"type": "WEB",
"url": "https://security.netapp.com/advisory/ntap-20240216-0007"
},
{
"type": "WEB",
"url": "https://www.openwall.com/lists/oss-security/2024/01/30/6"
},
{
"type": "WEB",
"url": "https://www.qualys.com/2024/01/30/cve-2023-6246/syslog.txt"
},
{
"type": "WEB",
"url": "http://packetstormsecurity.com/files/176931/glibc-qsort-Out-Of-Bounds-Read-Write.html"
},
{
"type": "WEB",
"url": "http://packetstormsecurity.com/files/176932/glibc-syslog-Heap-Based-Buffer-Overflow.html"
},
{
"type": "WEB",
"url": "http://seclists.org/fulldisclosure/2024/Feb/3"
},
{
"type": "WEB",
"url": "http://seclists.org/fulldisclosure/2024/Feb/5"
}
],
"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-P6VX-VQJ8-Q8R8
Vulnerability from github – Published: 2024-11-12 18:30 – Updated: 2024-11-12 18:30SQL Server Native Client Remote Code Execution Vulnerability
{
"affected": [],
"aliases": [
"CVE-2024-48993"
],
"database_specific": {
"cwe_ids": [
"CWE-122"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2024-11-12T18:15:35Z",
"severity": "HIGH"
},
"details": "SQL Server Native Client Remote Code Execution Vulnerability",
"id": "GHSA-p6vx-vqj8-q8r8",
"modified": "2024-11-12T18:30:59Z",
"published": "2024-11-12T18:30:59Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2024-48993"
},
{
"type": "WEB",
"url": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2024-48993"
}
],
"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-P6W8-298R-9237
Vulnerability from github – Published: 2026-07-14 18:31 – Updated: 2026-07-14 18:31Heap-based buffer overflow in Active Directory Domain Services allows an unauthorized attacker to execute code over a network.
{
"affected": [],
"aliases": [
"CVE-2026-49164"
],
"database_specific": {
"cwe_ids": [
"CWE-122"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2026-07-14T17:16:51Z",
"severity": "HIGH"
},
"details": "Heap-based buffer overflow in Active Directory Domain Services allows an unauthorized attacker to execute code over a network.",
"id": "GHSA-p6w8-298r-9237",
"modified": "2026-07-14T18:31:59Z",
"published": "2026-07-14T18:31:59Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-49164"
},
{
"type": "WEB",
"url": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-49164"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H",
"type": "CVSS_V3"
}
]
}
GHSA-P724-HCMR-XF8C
Vulnerability from github – Published: 2022-05-24 17:38 – Updated: 2022-07-29 00:00A vulnerability has been identified in SCALANCE X-200 switch family (incl. SIPLUS NET variants) (All versions), SCALANCE X-200IRT switch family (incl. SIPLUS NET variants) (All versions). The web server of the affected devices contains a vulnerability that may lead to a buffer overflow condition. An attacker could cause this condition on the webserver by sending a specially crafted request. The webserver could stop and not recover anymore.
{
"affected": [],
"aliases": [
"CVE-2020-25226"
],
"database_specific": {
"cwe_ids": [
"CWE-122",
"CWE-787"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2021-01-12T21:15:00Z",
"severity": "CRITICAL"
},
"details": "A vulnerability has been identified in SCALANCE X-200 switch family (incl. SIPLUS NET variants) (All versions), SCALANCE X-200IRT switch family (incl. SIPLUS NET variants) (All versions). The web server of the affected devices contains a vulnerability that may lead to a buffer overflow condition. An attacker could cause this condition on the webserver by sending a specially crafted request. The webserver could stop and not recover anymore.",
"id": "GHSA-p724-hcmr-xf8c",
"modified": "2022-07-29T00:00:24Z",
"published": "2022-05-24T17:38:31Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2020-25226"
},
{
"type": "WEB",
"url": "https://cert-portal.siemens.com/productcert/pdf/ssa-139628.pdf"
}
],
"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-P7C2-9FJF-G7CJ
Vulnerability from github – Published: 2026-04-01 06:31 – Updated: 2026-04-01 15:31Heap buffer overflow in GPU in Google Chrome prior to 146.0.7680.178 allowed a remote attacker to execute arbitrary code via a crafted HTML page. (Chromium security severity: High)
{
"affected": [],
"aliases": [
"CVE-2026-5272"
],
"database_specific": {
"cwe_ids": [
"CWE-122"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2026-04-01T05:16:00Z",
"severity": "HIGH"
},
"details": "Heap buffer overflow in GPU in Google Chrome prior to 146.0.7680.178 allowed a remote attacker to execute arbitrary code via a crafted HTML page. (Chromium security severity: High)",
"id": "GHSA-p7c2-9fjf-g7cj",
"modified": "2026-04-01T15:31:13Z",
"published": "2026-04-01T06:31:31Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-5272"
},
{
"type": "WEB",
"url": "https://chromereleases.googleblog.com/2026/03/stable-channel-update-for-desktop_31.html"
},
{
"type": "WEB",
"url": "https://issues.chromium.org/issues/491732188"
}
],
"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-P7JQ-9JCX-RWRH
Vulnerability from github – Published: 2024-11-22 21:32 – Updated: 2024-11-22 21:32IrfanView ECW File Parsing Heap-based Buffer Overflow Remote Code Execution Vulnerability. This vulnerability allows remote attackers to execute arbitrary code on affected installations of IrfanView. User interaction is required to exploit this vulnerability in that the target must visit a malicious page or open a malicious file.
The specific flaw exists within the parsing of ECW files. The issue results from the lack of proper validation of the length of user-supplied data prior to copying it to a heap-based buffer. An attacker can leverage this vulnerability to execute code in the context of the current process. Was ZDI-CAN-23975.
{
"affected": [],
"aliases": [
"CVE-2024-11514"
],
"database_specific": {
"cwe_ids": [
"CWE-122",
"CWE-787"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2024-11-22T21:15:09Z",
"severity": "HIGH"
},
"details": "IrfanView ECW File Parsing Heap-based Buffer Overflow Remote Code Execution Vulnerability. This vulnerability allows remote attackers to execute arbitrary code on affected installations of IrfanView. User interaction is required to exploit this vulnerability in that the target must visit a malicious page or open a malicious file.\n\nThe specific flaw exists within the parsing of ECW files. The issue results from the lack of proper validation of the length of user-supplied data prior to copying it to a heap-based buffer. An attacker can leverage this vulnerability to execute code in the context of the current process. Was ZDI-CAN-23975.",
"id": "GHSA-p7jq-9jcx-rwrh",
"modified": "2024-11-22T21:32:17Z",
"published": "2024-11-22T21:32:17Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2024-11514"
},
{
"type": "WEB",
"url": "https://www.zerodayinitiative.com/advisories/ZDI-24-1599"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H",
"type": "CVSS_V3"
}
]
}
GHSA-P824-JMV3-C7RJ
Vulnerability from github – Published: 2026-04-15 21:30 – Updated: 2026-04-16 12:31Heap buffer overflow in PDFium in Google Chrome prior to 147.0.7727.101 allowed a remote attacker to execute arbitrary code inside a sandbox via a crafted PDF file. (Chromium security severity: High)
{
"affected": [],
"aliases": [
"CVE-2026-6306"
],
"database_specific": {
"cwe_ids": [
"CWE-122"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2026-04-15T20:16:39Z",
"severity": "HIGH"
},
"details": "Heap buffer overflow in PDFium in Google Chrome prior to 147.0.7727.101 allowed a remote attacker to execute arbitrary code inside a sandbox via a crafted PDF file. (Chromium security severity: High)",
"id": "GHSA-p824-jmv3-c7rj",
"modified": "2026-04-16T12:31:40Z",
"published": "2026-04-15T21:30:19Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-6306"
},
{
"type": "WEB",
"url": "https://chromereleases.googleblog.com/2026/04/stable-channel-update-for-desktop_15.html"
},
{
"type": "WEB",
"url": "https://issues.chromium.org/issues/496907110"
}
],
"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.