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().
5413 vulnerabilities reference this CWE, most recent first.
GHSA-MP8C-HC24-4RFR
Vulnerability from github – Published: 2026-09-08 18:33 – Updated: 2026-09-08 18:33Heap-based buffer overflow in Microsoft Office Word allows an unauthorized attacker to execute code over a network.
{
"affected": [],
"aliases": [
"CVE-2026-78510"
],
"database_specific": {
"cwe_ids": [
"CWE-122"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2026-09-08T18:20:46Z",
"severity": "CRITICAL"
},
"details": "Heap-based buffer overflow in Microsoft Office Word allows an unauthorized attacker to execute code over a network.",
"id": "GHSA-mp8c-hc24-4rfr",
"modified": "2026-09-08T18:33:26Z",
"published": "2026-09-08T18:33:26Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-78510"
},
{
"type": "WEB",
"url": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-78510"
}
],
"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-MP8P-XHGF-RPJV
Vulnerability from github – Published: 2026-01-02 18:30 – Updated: 2026-06-30 03:35gpsd before commit dc966aa contains a heap-based out-of-bounds write vulnerability in the drivers/driver_nmea2000.c file. The hnd_129540 function, which handles NMEA2000 PGN 129540 (GNSS Satellites in View) packets, fails to validate the user-supplied satellite count against the size of the skyview array (184 elements). This allows an attacker to write beyond the bounds of the array by providing a satellite count up to 255, leading to memory corruption, Denial of Service (DoS), and potentially arbitrary code execution.
{
"affected": [],
"aliases": [
"CVE-2025-67268"
],
"database_specific": {
"cwe_ids": [
"CWE-122",
"CWE-1285"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2026-01-02T16:17:00Z",
"severity": "CRITICAL"
},
"details": "gpsd before commit dc966aa contains a heap-based out-of-bounds write vulnerability in the drivers/driver_nmea2000.c file. The hnd_129540 function, which handles NMEA2000 PGN 129540 (GNSS Satellites in View) packets, fails to validate the user-supplied satellite count against the size of the skyview array (184 elements). This allows an attacker to write beyond the bounds of the array by providing a satellite count up to 255, leading to memory corruption, Denial of Service (DoS), and potentially arbitrary code execution.",
"id": "GHSA-mp8p-xhgf-rpjv",
"modified": "2026-06-30T03:35:23Z",
"published": "2026-01-02T18:30:31Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2025-67268"
},
{
"type": "WEB",
"url": "https://github.com/ntpsec/gpsd/commit/dc966aa74c075d0a6535811d98628625cbfbe3f4"
},
{
"type": "WEB",
"url": "https://access.redhat.com/errata/RHSA-2026:0770"
},
{
"type": "WEB",
"url": "https://access.redhat.com/errata/RHSA-2026:0771"
},
{
"type": "WEB",
"url": "https://access.redhat.com/errata/RHSA-2026:1621"
},
{
"type": "WEB",
"url": "https://access.redhat.com/security/cve/CVE-2025-67268"
},
{
"type": "WEB",
"url": "https://bugzilla.redhat.com/show_bug.cgi?id=2426835"
},
{
"type": "WEB",
"url": "https://github.com/Jaenact/gspd_cve/blob/main/CVE-2025-67268/README.md"
},
{
"type": "WEB",
"url": "https://github.com/ntpsec/gpsd/blob/master/drivers/driver_nmea2000.c"
},
{
"type": "WEB",
"url": "https://security.access.redhat.com/data/csaf/v2/vex/2025/cve-2025-67268.json"
}
],
"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-MPF7-WP9R-5PWF
Vulnerability from github – Published: 2026-07-14 18:32 – Updated: 2026-07-14 18:32Heap-based buffer overflow in Microsoft Office allows an unauthorized attacker to execute code locally.
{
"affected": [],
"aliases": [
"CVE-2026-55140"
],
"database_specific": {
"cwe_ids": [
"CWE-122"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2026-07-14T18:18:20Z",
"severity": "HIGH"
},
"details": "Heap-based buffer overflow in Microsoft Office allows an unauthorized attacker to execute code locally.",
"id": "GHSA-mpf7-wp9r-5pwf",
"modified": "2026-07-14T18:32:36Z",
"published": "2026-07-14T18:32:36Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-55140"
},
{
"type": "WEB",
"url": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-55140"
}
],
"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-MPFJ-4QFV-J4R3
Vulnerability from github – Published: 2026-06-05 00:31 – Updated: 2026-06-05 18:31Inappropriate implementation in V8 in Google Chrome prior to 149.0.7827.53 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-2026-10989"
],
"database_specific": {
"cwe_ids": [
"CWE-122"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2026-06-04T23:17:02Z",
"severity": "HIGH"
},
"details": "Inappropriate implementation in V8 in Google Chrome prior to 149.0.7827.53 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-mpfj-4qfv-j4r3",
"modified": "2026-06-05T18:31:33Z",
"published": "2026-06-05T00:31:42Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-10989"
},
{
"type": "WEB",
"url": "https://chromereleases.googleblog.com/2026/06/stable-channel-update-for-desktop.html"
},
{
"type": "WEB",
"url": "https://issues.chromium.org/issues/516311623"
}
],
"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-MQ5P-G6C9-C5HC
Vulnerability from github – Published: 2025-07-08 18:31 – Updated: 2025-07-08 18:31Heap-based buffer overflow in Windows Routing and Remote Access Service (RRAS) allows an unauthorized attacker to execute code over a network.
{
"affected": [],
"aliases": [
"CVE-2025-47998"
],
"database_specific": {
"cwe_ids": [
"CWE-122",
"CWE-787"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2025-07-08T17:15:41Z",
"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-mq5p-g6c9-c5hc",
"modified": "2025-07-08T18:31:45Z",
"published": "2025-07-08T18:31:45Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2025-47998"
},
{
"type": "WEB",
"url": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-47998"
}
],
"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-MQ5W-GRF9-5RP9
Vulnerability from github – Published: 2024-11-14 12:31 – Updated: 2026-05-12 12:32A heap-based buffer overflow was found in the SDHCI device emulation of QEMU. The bug is triggered when both s->data_count and the size of s->fifo_buffer are set to 0x200, leading to an out-of-bound access. A malicious guest could use this flaw to crash the QEMU process on the host, resulting in a denial of service condition.
{
"affected": [],
"aliases": [
"CVE-2024-3447"
],
"database_specific": {
"cwe_ids": [
"CWE-122"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2024-11-14T12:15:17Z",
"severity": "MODERATE"
},
"details": "A heap-based buffer overflow was found in the SDHCI device emulation of QEMU. The bug is triggered when both `s-\u003edata_count` and the size of `s-\u003efifo_buffer` are set to 0x200, leading to an out-of-bound access. A malicious guest could use this flaw to crash the QEMU process on the host, resulting in a denial of service condition.",
"id": "GHSA-mq5w-grf9-5rp9",
"modified": "2026-05-12T12:32:12Z",
"published": "2024-11-14T12:31:02Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2024-3447"
},
{
"type": "WEB",
"url": "https://access.redhat.com/security/cve/CVE-2024-3447"
},
{
"type": "WEB",
"url": "https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=58813"
},
{
"type": "WEB",
"url": "https://bugzilla.redhat.com/show_bug.cgi?id=2274123"
},
{
"type": "WEB",
"url": "https://cert-portal.siemens.com/productcert/html/ssa-577017.html"
},
{
"type": "WEB",
"url": "https://lists.debian.org/debian-lts-announce/2025/04/msg00042.html"
},
{
"type": "WEB",
"url": "https://patchew.org/QEMU/20240404085549.16987-1-philmd@linaro.org"
},
{
"type": "WEB",
"url": "https://security.netapp.com/advisory/ntap-20250425-0005"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:N/I:N/A:H",
"type": "CVSS_V3"
}
]
}
GHSA-MQ8J-7FCJ-WMH8
Vulnerability from github – Published: 2026-09-16 21:32 – Updated: 2026-09-21 18:31HP has identified and remediated multiple externally reported vulnerabilities within HPLIP. The findings affect several software components that could potentially enable remote code execution, privilege escalation, denial of service, information disclosure, or unauthorized file modification under certain conditions.
{
"affected": [],
"aliases": [
"CVE-2026-91098"
],
"database_specific": {
"cwe_ids": [
"CWE-122"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2026-09-16T19:18:02Z",
"severity": "HIGH"
},
"details": "HP has identified and remediated multiple externally reported vulnerabilities within HPLIP. The findings affect several software components that could potentially enable remote code execution, privilege escalation, denial of service, information disclosure, or unauthorized file modification under certain conditions.",
"id": "GHSA-mq8j-7fcj-wmh8",
"modified": "2026-09-21T18:31:55Z",
"published": "2026-09-16T21:32:44Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-91098"
},
{
"type": "WEB",
"url": "https://support.hp.com/us-en/document/ish_15646959-15646984-16/hpsbpi04151"
}
],
"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: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-MQ8R-RQ42-5CHH
Vulnerability from github – Published: 2026-04-14 21:31 – Updated: 2026-04-14 21:31Bridge versions 16.0.2, 15.1.4 and earlier are affected by a Heap-based Buffer Overflow vulnerability that could result in arbitrary code execution in the context of the current user. Exploitation of this issue requires user interaction in that a victim must open a malicious file.
{
"affected": [],
"aliases": [
"CVE-2026-27312"
],
"database_specific": {
"cwe_ids": [
"CWE-122"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2026-04-14T20:16:34Z",
"severity": "HIGH"
},
"details": "Bridge versions 16.0.2, 15.1.4 and earlier are affected by a Heap-based Buffer Overflow vulnerability that could result in arbitrary code execution in the context of the current user. Exploitation of this issue requires user interaction in that a victim must open a malicious file.",
"id": "GHSA-mq8r-rq42-5chh",
"modified": "2026-04-14T21:31:48Z",
"published": "2026-04-14T21:31:48Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-27312"
},
{
"type": "WEB",
"url": "https://helpx.adobe.com/security/products/bridge/apsb26-39.html"
}
],
"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-MQ9P-QW76-Q6H7
Vulnerability from github – Published: 2024-05-06 15:30 – Updated: 2026-06-09 19:04wasm3 v0.5.0 was discovered to contain a heap buffer overflow which leads to segmentation fault via the function "DeallocateSlot" in wasm3/source/m3_compile.c.
{
"affected": [
{
"package": {
"ecosystem": "PyPI",
"name": "pywasm3"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"last_affected": "0.5.0"
}
],
"type": "ECOSYSTEM"
}
]
}
],
"aliases": [
"CVE-2024-34249"
],
"database_specific": {
"cwe_ids": [
"CWE-122"
],
"github_reviewed": true,
"github_reviewed_at": "2026-06-09T19:04:03Z",
"nvd_published_at": "2024-05-06T15:15:24Z",
"severity": "CRITICAL"
},
"details": "wasm3 v0.5.0 was discovered to contain a heap buffer overflow which leads to segmentation fault via the function \"DeallocateSlot\" in wasm3/source/m3_compile.c.",
"id": "GHSA-mq9p-qw76-q6h7",
"modified": "2026-06-09T19:04:04Z",
"published": "2024-05-06T15:30:39Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2024-34249"
},
{
"type": "WEB",
"url": "https://github.com/wasm3/wasm3/issues/485"
},
{
"type": "WEB",
"url": "https://github.com/pypa/advisory-database/tree/main/vulns/pywasm3/PYSEC-2024-308.yaml"
},
{
"type": "PACKAGE",
"url": "https://github.com/wasm3/pywasm3"
},
{
"type": "WEB",
"url": "https://github.com/wasm3/pywasm3/blob/main/wasm3/m3_compile.c#L420"
}
],
"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"
}
],
"summary": "pywasm3 contains a heap buffer overflow which leads to segmentation fault"
}
GHSA-MQ9X-53X3-39H5
Vulnerability from github – Published: 2022-05-13 01:17 – Updated: 2022-05-13 01:17Linux kernel is vulnerable to a heap-based buffer overflow in the fs/ext4/xattr.c:ext4_xattr_set_entry() function. An attacker could exploit this by operating on a mounted crafted ext4 image.
{
"affected": [],
"aliases": [
"CVE-2018-10840"
],
"database_specific": {
"cwe_ids": [
"CWE-122",
"CWE-787"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2018-07-16T20:29:00Z",
"severity": "HIGH"
},
"details": "Linux kernel is vulnerable to a heap-based buffer overflow in the fs/ext4/xattr.c:ext4_xattr_set_entry() function. An attacker could exploit this by operating on a mounted crafted ext4 image.",
"id": "GHSA-mq9x-53x3-39h5",
"modified": "2022-05-13T01:17:56Z",
"published": "2022-05-13T01:17:56Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2018-10840"
},
{
"type": "WEB",
"url": "https://access.redhat.com/errata/RHSA-2019:0162"
},
{
"type": "WEB",
"url": "https://access.redhat.com/security/cve/CVE-2018-10840"
},
{
"type": "WEB",
"url": "https://bugzilla.redhat.com/show_bug.cgi?id=1582346"
},
{
"type": "WEB",
"url": "https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2018-10840"
},
{
"type": "WEB",
"url": "https://usn.ubuntu.com/3752-1"
},
{
"type": "WEB",
"url": "https://usn.ubuntu.com/3752-2"
},
{
"type": "WEB",
"url": "https://usn.ubuntu.com/3752-3"
},
{
"type": "WEB",
"url": "http://www.securityfocus.com/bid/104858"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:P/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.