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().
6292 vulnerabilities reference this CWE, most recent first.
GHSA-93GX-49QX-8F59
Vulnerability from github – Published: 2022-05-24 17:36 – Updated: 2022-05-24 17:36A flaw was found in xorg-x11-server before 1.20.10. A heap-buffer overflow in XkbSetDeviceInfo may lead to a privilege escalation vulnerability. The highest threat from this vulnerability is to data confidentiality and integrity as well as system availability.
{
"affected": [],
"aliases": [
"CVE-2020-25712"
],
"database_specific": {
"cwe_ids": [
"CWE-122"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2020-12-15T17:15:00Z",
"severity": "HIGH"
},
"details": "A flaw was found in xorg-x11-server before 1.20.10. A heap-buffer overflow in XkbSetDeviceInfo may lead to a privilege escalation vulnerability. The highest threat from this vulnerability is to data confidentiality and integrity as well as system availability.",
"id": "GHSA-93gx-49qx-8f59",
"modified": "2022-05-24T17:36:28Z",
"published": "2022-05-24T17:36:28Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2020-25712"
},
{
"type": "WEB",
"url": "https://bugzilla.redhat.com/show_bug.cgi?id=1887276"
},
{
"type": "WEB",
"url": "https://lists.x.org/archives/xorg-announce/2020-December/003066.html"
}
],
"schema_version": "1.4.0",
"severity": []
}
GHSA-93J7-6H7J-5QFV
Vulnerability from github – Published: 2026-10-13 21:36 – Updated: 2026-10-13 21:36Heap-based buffer overflow in Windows Storage Spaces Controller allows an authorized attacker to elevate privileges locally.
{
"affected": [],
"aliases": [
"CVE-2026-87706"
],
"database_specific": {
"cwe_ids": [
"CWE-122"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2026-10-13T19:21:23Z",
"severity": "HIGH"
},
"details": "Heap-based buffer overflow in Windows Storage Spaces Controller allows an authorized attacker to elevate privileges locally.",
"id": "GHSA-93j7-6h7j-5qfv",
"modified": "2026-10-13T21:36:27Z",
"published": "2026-10-13T21:36:27Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-87706"
},
{
"type": "WEB",
"url": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-87706"
}
],
"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-93MW-X5WH-JF8F
Vulnerability from github – Published: 2026-10-06 12:30 – Updated: 2026-10-06 12:30GNU Aspell prezip-bin contains a heap-based buffer overflow vulnerability in the decompressor in prog/prezip.c. The decompressor does not properly check buffer space, so a crafted compressed file can cause out-of-bounds read and write operations on the heap. An attacker who convinces a user to process a malicious compressed file with prezip-bin can trigger memory corruption, leading to a processs crash.
This issue was fixed in commit 15b188437f9e0192d4ac4472ad66a4e2f62a782f which will be released in version 0.60.8.3.
{
"affected": [],
"aliases": [
"CVE-2026-75818"
],
"database_specific": {
"cwe_ids": [
"CWE-122"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2026-10-06T11:17:29Z",
"severity": "LOW"
},
"details": "GNU Aspell prezip-bin contains a heap-based buffer overflow vulnerability in the decompressor in prog/prezip.c. The decompressor does not properly check buffer space, so a crafted compressed file can cause out-of-bounds read and write operations on the heap. An attacker who convinces a user to process a malicious compressed file with prezip-bin can trigger memory corruption, leading to a processs crash.\n\n\n\nThis issue was fixed in commit\u00a015b188437f9e0192d4ac4472ad66a4e2f62a782f which will be\u00a0released in version\u00a00.60.8.3.",
"id": "GHSA-93mw-x5wh-jf8f",
"modified": "2026-10-06T12:30:31Z",
"published": "2026-10-06T12:30:31Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-75818"
},
{
"type": "WEB",
"url": "https://cert.pl/en/posts/2026/10/CVE-2026-75818"
},
{
"type": "WEB",
"url": "http://aspell.net"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:4.0/AV:L/AC:H/AT:N/PR:N/UI:A/VC:N/VI:N/VA:L/SC:L/SI:L/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-93VJ-795W-GH3C
Vulnerability from github – Published: 2024-06-11 21:32 – Updated: 2024-06-20 15:31Heap buffer overflow in Tab Groups in Google Chrome prior to 126.0.6478.54 allowed a remote attacker who convinced a user to engage in specific UI gestures to potentially exploit heap corruption via a crafted HTML page. (Chromium security severity: High)
{
"affected": [],
"aliases": [
"CVE-2024-5835"
],
"database_specific": {
"cwe_ids": [
"CWE-122",
"CWE-787"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2024-06-11T21:15:54Z",
"severity": "HIGH"
},
"details": "Heap buffer overflow in Tab Groups in Google Chrome prior to 126.0.6478.54 allowed a remote attacker who convinced a user to engage in specific UI gestures to potentially exploit heap corruption via a crafted HTML page. (Chromium security severity: High)",
"id": "GHSA-93vj-795w-gh3c",
"modified": "2024-06-20T15:31:11Z",
"published": "2024-06-11T21:32:19Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2024-5835"
},
{
"type": "WEB",
"url": "https://chromereleases.googleblog.com/2024/06/stable-channel-update-for-desktop.html"
},
{
"type": "WEB",
"url": "https://issues.chromium.org/issues/341991535"
},
{
"type": "WEB",
"url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/7VXA32LXMNK3DSK3JBRLTBPFUH7LTODU"
},
{
"type": "WEB",
"url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/MPU7AB53QQVNTBPGRMJRY5SXJNYWW3FX"
}
],
"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-942X-H2H3-8WXM
Vulnerability from github – Published: 2025-01-30 06:30 – Updated: 2025-02-07 18:31In some cases, the ktrace facility will log the contents of kernel structures to userspace. In one such case, ktrace dumps a variable-sized sockaddr to userspace. There, the full sockaddr is copied, even when it is shorter than the full size. This can result in up to 14 uninitialized bytes of kernel memory being copied out to userspace.
It is possible for an unprivileged userspace program to leak 14 bytes of a kernel heap allocation to userspace.
{
"affected": [],
"aliases": [
"CVE-2025-0662"
],
"database_specific": {
"cwe_ids": [
"CWE-122"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2025-01-30T05:15:10Z",
"severity": "MODERATE"
},
"details": "In some cases, the ktrace facility will log the contents of kernel structures to userspace. In one such case, ktrace dumps a variable-sized sockaddr to userspace. There, the full sockaddr is copied, even when it is shorter than the full size. This can result in up to 14 uninitialized bytes of kernel memory being copied out to userspace.\n\nIt is possible for an unprivileged userspace program to leak 14 bytes of a kernel heap allocation to userspace.",
"id": "GHSA-942x-h2h3-8wxm",
"modified": "2025-02-07T18:31:17Z",
"published": "2025-01-30T06:30:49Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2025-0662"
},
{
"type": "WEB",
"url": "https://security.freebsd.org/advisories/FreeBSD-SA-25:04.ktrace.asc"
},
{
"type": "WEB",
"url": "https://security.netapp.com/advisory/ntap-20250207-0006"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:N",
"type": "CVSS_V3"
}
]
}
GHSA-947V-4HFW-4P67
Vulnerability from github – Published: 2022-05-13 01:04 – Updated: 2022-05-13 01:04The Gluster file system through versions 4.1.4 and 3.12 is vulnerable to a heap-based buffer overflow in the '__server_getspec' function via the 'gf_getspec_req' RPC message. A remote authenticated attacker could exploit this to cause a denial of service or other potential unspecified impact.
{
"affected": [],
"aliases": [
"CVE-2018-14653"
],
"database_specific": {
"cwe_ids": [
"CWE-122",
"CWE-787"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2018-10-31T19:29:00Z",
"severity": "HIGH"
},
"details": "The Gluster file system through versions 4.1.4 and 3.12 is vulnerable to a heap-based buffer overflow in the \u0027__server_getspec\u0027 function via the \u0027gf_getspec_req\u0027 RPC message. A remote authenticated attacker could exploit this to cause a denial of service or other potential unspecified impact.",
"id": "GHSA-947v-4hfw-4p67",
"modified": "2022-05-13T01:04:24Z",
"published": "2022-05-13T01:04:24Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2018-14653"
},
{
"type": "WEB",
"url": "https://access.redhat.com/errata/RHSA-2018:3431"
},
{
"type": "WEB",
"url": "https://access.redhat.com/errata/RHSA-2018:3432"
},
{
"type": "WEB",
"url": "https://access.redhat.com/errata/RHSA-2018:3470"
},
{
"type": "WEB",
"url": "https://access.redhat.com/security/cve/CVE-2018-14653"
},
{
"type": "WEB",
"url": "https://bugzilla.redhat.com/show_bug.cgi?id=1633431"
},
{
"type": "WEB",
"url": "https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2018-14653"
},
{
"type": "WEB",
"url": "https://lists.debian.org/debian-lts-announce/2018/11/msg00003.html"
},
{
"type": "WEB",
"url": "https://lists.debian.org/debian-lts-announce/2021/11/msg00000.html"
},
{
"type": "WEB",
"url": "https://security.gentoo.org/glsa/201904-06"
}
],
"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-949M-7G7C-97PF
Vulnerability from github – Published: 2021-12-21 00:00 – Updated: 2021-12-28 00:01Fuji Electric V-Server Lite and Tellus Lite V-Simulator prior to v4.0.12.0 is vulnerable a heap-based buffer overflow when parsing a specially crafted project file, which may allow an attacker to execute arbitrary code.
{
"affected": [],
"aliases": [
"CVE-2021-38415"
],
"database_specific": {
"cwe_ids": [
"CWE-122"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2021-12-20T21:15:00Z",
"severity": "HIGH"
},
"details": "Fuji Electric V-Server Lite and Tellus Lite V-Simulator prior to v4.0.12.0 is vulnerable a heap-based buffer overflow when parsing a specially crafted project file, which may allow an attacker to execute arbitrary code.",
"id": "GHSA-949m-7g7c-97pf",
"modified": "2021-12-28T00:01:24Z",
"published": "2021-12-21T00:00:34Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2021-38415"
},
{
"type": "WEB",
"url": "https://www.cisa.gov/uscert/ics/advisories/icsa-21-299-01"
}
],
"schema_version": "1.4.0",
"severity": []
}
GHSA-94FG-H7W4-J3F9
Vulnerability from github – Published: 2026-10-13 21:37 – Updated: 2026-10-13 21:37Heap-based buffer overflow in Microsoft Office Excel allows an unauthorized attacker to execute code over a network.
{
"affected": [],
"aliases": [
"CVE-2026-97763"
],
"database_specific": {
"cwe_ids": [
"CWE-122"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2026-10-13T19:22:14Z",
"severity": "HIGH"
},
"details": "Heap-based buffer overflow in Microsoft Office Excel allows an unauthorized attacker to execute code over a network.",
"id": "GHSA-94fg-h7w4-j3f9",
"modified": "2026-10-13T21:37:12Z",
"published": "2026-10-13T21:37:12Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-97763"
},
{
"type": "WEB",
"url": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-97763"
}
],
"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-94XM-PF3P-6PQ6
Vulnerability from github – Published: 2024-07-09 18:30 – Updated: 2024-07-09 18:30Windows Imaging Component Remote Code Execution Vulnerability
{
"affected": [],
"aliases": [
"CVE-2024-38060"
],
"database_specific": {
"cwe_ids": [
"CWE-122",
"CWE-787"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2024-07-09T17:15:37Z",
"severity": "HIGH"
},
"details": "Windows Imaging Component Remote Code Execution Vulnerability",
"id": "GHSA-94xm-pf3p-6pq6",
"modified": "2024-07-09T18:30:51Z",
"published": "2024-07-09T18:30:51Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2024-38060"
},
{
"type": "WEB",
"url": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2024-38060"
}
],
"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-94XR-M4G8-Q6CC
Vulnerability from github – Published: 2026-07-19 18:31 – Updated: 2026-07-20 15:31In the Linux kernel, the following vulnerability has been resolved:
KVM: SEV: Compute the correct max length of the in-GHCB scratch area
When setting the length of the GHCB scratch area, and the area is in the GHCB shared buffer, set the effective length of the scratch area to the max possible size given the start of the guest-provided pointer, and the end of the shared buffer.
The code was "fine" when first introduced, as KVM doesn't consult the length of the buffer when emulating MMIO, because the passed in @len always specifies the max size required. But for PSC requests, the incoming @len is just the minimum length (to process the header), and KVM needs to know the full size of the scratch area to avoid buffer overflows (spoiler alert).
Opportunistically rename @len => @min_len to better reflect its role.
{
"affected": [],
"aliases": [
"CVE-2026-63939"
],
"database_specific": {
"cwe_ids": [
"CWE-122"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2026-07-19T16:17:12Z",
"severity": "CRITICAL"
},
"details": "In the Linux kernel, the following vulnerability has been resolved:\n\nKVM: SEV: Compute the correct max length of the in-GHCB scratch area\n\nWhen setting the length of the GHCB scratch area, and the area is in the\nGHCB shared buffer, set the effective length of the scratch area to the max\npossible size given the start of the guest-provided pointer, and the end of\nthe shared buffer.\n\nThe code was \"fine\" when first introduced, as KVM doesn\u0027t consult the\nlength of the buffer when emulating MMIO, because the passed in @len always\nspecifies the *max* size required. But for PSC requests, the incoming @len\nis just the minimum length (to process the header), and KVM needs to know\nthe full size of the scratch area to avoid buffer overflows (spoiler alert).\n\nOpportunistically rename @len =\u003e @min_len to better reflect its role.",
"id": "GHSA-94xr-m4g8-q6cc",
"modified": "2026-07-20T15:31:52Z",
"published": "2026-07-19T18:31:46Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-63939"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/5867d7e202e09f037cefe77f7af4413c7c0fa088"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/6644565527c4c5f507088b1c9ddf72de47790b68"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/6ca9400d36005ffdca25f80186bea781c7e1dc4c"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/9f0a9e780f02c02d025a190f1885e1d1d73b87bd"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/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.