CWE-787
Weakness Allowed-with-ReviewOut-of-bounds Write
Abstraction: Base · Status: Draft
The product writes data past the end, or before the beginning, of the intended buffer.
Dimensions
- Behavior-Type: Write
- Resource-Type: Memory Buffer
- Resource-Property: Out-of-bounds
Mapping guidance
This CWE entry is at the Base level of abstraction, which is a preferred level of abstraction for mapping to the root causes of vulnerabilities. However, closer examination is required.
While this CWE is allowed for mapping, it has more specific children that might be a better fit. Carefully read both the name and description to ensure that this mapping is appropriate. Consider the root cause errors that have led to the out-of-bounds write by examining "CanFollow" relationships for this entry.
Relationships and members
Modes of introduction
Detection methods
Automated Static Analysis
This weakness can often be detected using automated static analysis tools. Many modern tools use data flow analysis or constraint-based techniques to minimize the number of false positives.
Automated static analysis generally does not account for environmental considerations when reporting out-of-bounds memory operations. This can make it difficult for users to determine which warnings should be investigated first. For example, an analysis tool might report buffer overflows that originate from command line arguments in a program that is not expected to run with setuid or other special privileges.
Effectiveness: High
Detection techniques for buffer-related errors are more mature than for most other weakness types.
Automated Dynamic Analysis
This weakness can be detected using dynamic tools and techniques that interact with the software using large test suites with many diverse inputs, such as fuzz testing (fuzzing), robustness testing, and fault injection. The software's operation may slow down, but it should not become unstable, crash, or generate incorrect results.
Automated Dynamic Analysis
Use tools that are integrated during compilation to insert runtime error-checking mechanisms related to memory safety errors, such as AddressSanitizer (ASan) for C/C++ [REF-1518].
Effectiveness: Moderate
Crafted inputs are necessary to reach the code containing the error, such as generated by fuzzers. Also, these tools may reduce performance, and they only report the error condition - not the original mistake that led to the error.
Content history
Suggested mappings to ISA/IEC 62443.
Provided diagram to improve CWE usability
updated Demonstrative_Examples
updated Relationships
updated Common_Consequences
updated Demonstrative_Examples
updated Relationships
updated Description
updated Applicable_Platforms, Demonstrative_Examples, Detection_Factors, Likelihood_of_Exploit, Observed_Examples, Potential_Mitigations, References, Relationships, Time_of_Introduction
updated Observed_Examples, Relationships
updated Observed_Examples
updated Alternate_Terms, Demonstrative_Examples, Observed_Examples, Relationships
updated Relationships
updated Demonstrative_Examples
updated Demonstrative_Examples, Potential_Mitigations, Relationships
updated Observed_Examples, Relationships
updated Applicable_Platforms
updated Alternate_Terms, Demonstrative_Examples, Description
updated Potential_Mitigations, References, Relationships, Taxonomy_Mappings
updated Mapping_Notes, Relationships, Taxonomy_Mappings
updated Demonstrative_Examples
updated Alternate_Terms, Common_Consequences, Description, Diagram, Weakness_Ordinalities
updated Observed_Examples, Relationships
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updated Affected_Resources, Functional_Areas, References
updated Applicable_Platforms, Detection_Factors, References, Relationships
updated Mapping_Notes
updated Dimensions, Observed_Examples, References, Relationships, Taxonomy_Mappings
16900 vulnerabilities reference this CWE, most recent first.
GHSA-MF3V-8J77-QPF6
Vulnerability from github – Published: 2022-05-13 01:02 – Updated: 2022-05-13 01:02Stack overflow in PDFium in Google Chrome prior to 60.0.3112.78 for Linux, Windows, and Mac allowed a remote attacker to potentially exploit stack corruption via a crafted PDF file.
{
"affected": [],
"aliases": [
"CVE-2017-5095"
],
"database_specific": {
"cwe_ids": [
"CWE-787"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2017-10-27T05:29:00Z",
"severity": "HIGH"
},
"details": "Stack overflow in PDFium in Google Chrome prior to 60.0.3112.78 for Linux, Windows, and Mac allowed a remote attacker to potentially exploit stack corruption via a crafted PDF file.",
"id": "GHSA-mf3v-8j77-qpf6",
"modified": "2022-05-13T01:02:41Z",
"published": "2022-05-13T01:02:41Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2017-5095"
},
{
"type": "WEB",
"url": "https://access.redhat.com/errata/RHSA-2017:1833"
},
{
"type": "WEB",
"url": "https://chromereleases.googleblog.com/2017/07/stable-channel-update-for-desktop.html"
},
{
"type": "WEB",
"url": "https://crbug.com/732661"
},
{
"type": "WEB",
"url": "https://security.gentoo.org/glsa/201709-15"
},
{
"type": "WEB",
"url": "http://www.debian.org/security/2017/dsa-3926"
},
{
"type": "WEB",
"url": "http://www.securityfocus.com/bid/99950"
}
],
"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-MF4F-2VJV-3RQ6
Vulnerability from github – Published: 2025-03-03 18:31 – Updated: 2026-06-26 00:31A flaw was found in grub2. When performing a symlink lookup from a reiserfs filesystem, grub's reiserfs fs module uses user-controlled parameters from the filesystem geometry to determine the internal buffer size, however, it improperly checks for integer overflows. A maliciouly crafted filesystem may lead some of those buffer size calculations to overflow, causing it to perform a grub_malloc() operation with a smaller size than expected. As a result, the grub_reiserfs_read_symlink() will call grub_reiserfs_read_real() with a overflown length parameter, leading to a heap based out-of-bounds write during data reading. This flaw may be leveraged to corrupt grub's internal critical data and can result in arbitrary code execution, by-passing secure boot protections.
{
"affected": [],
"aliases": [
"CVE-2025-0684"
],
"database_specific": {
"cwe_ids": [
"CWE-787"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2025-03-03T18:15:30Z",
"severity": "MODERATE"
},
"details": "A flaw was found in grub2. When performing a symlink lookup from a reiserfs filesystem, grub\u0027s reiserfs fs module uses user-controlled parameters from the filesystem geometry to determine the internal buffer size, however, it improperly checks for integer overflows. A maliciouly crafted filesystem may lead some of those buffer size calculations to overflow, causing it to perform a grub_malloc() operation with a smaller size than expected. As a result, the grub_reiserfs_read_symlink() will call grub_reiserfs_read_real() with a overflown length parameter, leading to a heap based out-of-bounds write during data reading. This flaw may be leveraged to corrupt grub\u0027s internal critical data and can result in arbitrary code execution, by-passing secure boot protections.",
"id": "GHSA-mf4f-2vjv-3rq6",
"modified": "2026-06-26T00:31:58Z",
"published": "2025-03-03T18:31:29Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2025-0684"
},
{
"type": "WEB",
"url": "https://access.redhat.com/security/cve/CVE-2025-0684"
},
{
"type": "WEB",
"url": "https://bugzilla.redhat.com/show_bug.cgi?id=2346119"
},
{
"type": "WEB",
"url": "https://lists.gnu.org/archive/html/grub-devel/2025-02/msg00024.html"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H",
"type": "CVSS_V3"
}
]
}
GHSA-MF5C-MPV7-GXG8
Vulnerability from github – Published: 2023-07-10 18:30 – Updated: 2024-04-04 05:53Tenda FH1203 V2.0.1.6 was discovered to contain a stack overflow via the ssid parameter in the form_fast_setting_wifi_set function.
{
"affected": [],
"aliases": [
"CVE-2023-37700"
],
"database_specific": {
"cwe_ids": [
"CWE-787"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2023-07-10T17:15:09Z",
"severity": "CRITICAL"
},
"details": "Tenda FH1203 V2.0.1.6 was discovered to contain a stack overflow via the ssid parameter in the form_fast_setting_wifi_set function.",
"id": "GHSA-mf5c-mpv7-gxg8",
"modified": "2024-04-04T05:53:43Z",
"published": "2023-07-10T18:30:50Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2023-37700"
},
{
"type": "WEB",
"url": "https://github.com/FirmRec/IoT-Vulns/tree/main/tenda/6905"
}
],
"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-MF5W-78VR-G8GF
Vulnerability from github – Published: 2025-12-10 12:31 – Updated: 2025-12-10 12:31An unauthenticated remote attacker can abuse unsafe sscanf calls within the check_account() function to write arbitrary data into fixed-size stack buffers which leads to full device compromise.
{
"affected": [],
"aliases": [
"CVE-2025-41730"
],
"database_specific": {
"cwe_ids": [
"CWE-121",
"CWE-787"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2025-12-10T11:15:47Z",
"severity": "HIGH"
},
"details": "An unauthenticated remote attacker can abuse unsafe sscanf calls within the check_account() function to write arbitrary data into fixed-size stack buffers which leads to full device compromise.",
"id": "GHSA-mf5w-78vr-g8gf",
"modified": "2025-12-10T12:31:27Z",
"published": "2025-12-10T12:31:27Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2025-41730"
},
{
"type": "WEB",
"url": "https://certvde.com/de/advisories/VDE-2025-095"
}
],
"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-MF67-MV58-MFPV
Vulnerability from github – Published: 2023-05-16 03:30 – Updated: 2024-04-04 04:11D-Link DIR-605L firmware version 1.17B01 BETA is vulnerable to stack overflow via /goform/formTcpipSetup,
{
"affected": [],
"aliases": [
"CVE-2023-29961"
],
"database_specific": {
"cwe_ids": [
"CWE-787"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2023-05-16T01:15:09Z",
"severity": "CRITICAL"
},
"details": "D-Link DIR-605L firmware version 1.17B01 BETA is vulnerable to stack overflow via /goform/formTcpipSetup,",
"id": "GHSA-mf67-mv58-mfpv",
"modified": "2024-04-04T04:11:51Z",
"published": "2023-05-16T03:30:19Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2023-29961"
},
{
"type": "WEB",
"url": "https://github.com/Archerber/bug_submit/blob/main/D-Link/dir605l.md"
},
{
"type": "WEB",
"url": "https://www.dlink.com/en/security-bulletin"
}
],
"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-MF6C-8R47-23J5
Vulnerability from github – Published: 2024-01-08 15:30 – Updated: 2024-01-08 15:30Stack-based Buffer Overflow in GitHub repository gpac/gpac prior to 2.3-DEV.
{
"affected": [],
"aliases": [
"CVE-2024-0321"
],
"database_specific": {
"cwe_ids": [
"CWE-121",
"CWE-787"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2024-01-08T13:15:09Z",
"severity": "MODERATE"
},
"details": "Stack-based Buffer Overflow in GitHub repository gpac/gpac prior to 2.3-DEV.",
"id": "GHSA-mf6c-8r47-23j5",
"modified": "2024-01-08T15:30:27Z",
"published": "2024-01-08T15:30:27Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2024-0321"
},
{
"type": "WEB",
"url": "https://github.com/gpac/gpac/commit/d0ced41651b279bb054eb6390751e2d4eb84819a"
},
{
"type": "WEB",
"url": "https://huntr.com/bounties/4c027b94-8e9c-4c31-a169-893b25047769"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.0/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L",
"type": "CVSS_V3"
}
]
}
GHSA-MF6J-54V8-45QR
Vulnerability from github – Published: 2022-05-24 19:12 – Updated: 2022-05-24 19:12Acrobat Reader DC versions versions 2021.001.20150 (and earlier), 2020.001.30020 (and earlier) and 2017.011.30194 (and earlier) are affected by an Out-of-bounds Write vulnerability within the ImageTool component. An unauthenticated attacker could leverage this vulnerability to achieve 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-2021-28564"
],
"database_specific": {
"cwe_ids": [
"CWE-787"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2021-09-02T17:15:00Z",
"severity": "HIGH"
},
"details": "Acrobat Reader DC versions versions 2021.001.20150 (and earlier), 2020.001.30020 (and earlier) and 2017.011.30194 (and earlier) are affected by an Out-of-bounds Write vulnerability within the ImageTool component. An unauthenticated attacker could leverage this vulnerability to achieve 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-mf6j-54v8-45qr",
"modified": "2022-05-24T19:12:52Z",
"published": "2022-05-24T19:12:52Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2021-28564"
},
{
"type": "WEB",
"url": "https://helpx.adobe.com/security/products/acrobat/apsb21-29.html"
}
],
"schema_version": "1.4.0",
"severity": []
}
GHSA-MF9F-JQRC-3H6F
Vulnerability from github – Published: 2024-05-03 03:30 – Updated: 2024-05-03 03:30Kofax Power PDF JP2 File Parsing Out-Of-Bounds Write Remote Code Execution Vulnerability. This vulnerability allows remote attackers to execute arbitrary code on affected installations of Kofax Power PDF. 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 JP2 files. The issue results from the lack of proper validation of user-supplied data, which can result in a write past the end of an allocated object. An attacker can leverage this vulnerability to execute code in the context of the current process. Was ZDI-CAN-20487.
{
"affected": [],
"aliases": [
"CVE-2023-38081"
],
"database_specific": {
"cwe_ids": [
"CWE-787"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2024-05-03T02:15:49Z",
"severity": "HIGH"
},
"details": "Kofax Power PDF JP2 File Parsing Out-Of-Bounds Write Remote Code Execution Vulnerability. This vulnerability allows remote attackers to execute arbitrary code on affected installations of Kofax Power PDF. 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 JP2 files. The issue results from the lack of proper validation of user-supplied data, which can result in a write past the end of an allocated object. An attacker can leverage this vulnerability to execute code in the context of the current process. Was ZDI-CAN-20487.",
"id": "GHSA-mf9f-jqrc-3h6f",
"modified": "2024-05-03T03:30:54Z",
"published": "2024-05-03T03:30:54Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2023-38081"
},
{
"type": "WEB",
"url": "https://www.zerodayinitiative.com/advisories/ZDI-23-959"
}
],
"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-MFC2-QP9W-5VJ4
Vulnerability from github – Published: 2021-12-04 00:00 – Updated: 2021-12-07 00:00tsMuxer v2.6.16 was discovered to contain a heap-based buffer overflow via the function BitStreamReader::getCurVal in bitStream.h.
{
"affected": [],
"aliases": [
"CVE-2021-35344"
],
"database_specific": {
"cwe_ids": [
"CWE-787"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2021-12-03T20:15:00Z",
"severity": "CRITICAL"
},
"details": "tsMuxer v2.6.16 was discovered to contain a heap-based buffer overflow via the function BitStreamReader::getCurVal in bitStream.h.",
"id": "GHSA-mfc2-qp9w-5vj4",
"modified": "2021-12-07T00:00:52Z",
"published": "2021-12-04T00:00:51Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2021-35344"
},
{
"type": "WEB",
"url": "https://github.com/justdan96/tsMuxer/issues/432"
},
{
"type": "WEB",
"url": "https://github.com/justdan96/tsMuxer/pull/439/commits/3a889a37b5b74a45025aca13ebda394b8f706ef3"
}
],
"schema_version": "1.4.0",
"severity": []
}
GHSA-MFCF-PH4G-VJ2M
Vulnerability from github – Published: 2026-08-19 21:30 – Updated: 2026-08-19 21:30IBM AIX 7.2, and 7.3 and IBM PowerVM VIOS 4.1 could allow a remote attacker to execute arbitrary code due to a stack buffer overflow.
{
"affected": [],
"aliases": [
"CVE-2026-16894"
],
"database_specific": {
"cwe_ids": [
"CWE-787"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2026-08-19T20:17:10Z",
"severity": "CRITICAL"
},
"details": "IBM AIX 7.2, and 7.3 and IBM PowerVM VIOS 4.1 could allow a remote attacker to execute arbitrary code due to a stack buffer overflow.",
"id": "GHSA-mfcf-ph4g-vj2m",
"modified": "2026-08-19T21:30:35Z",
"published": "2026-08-19T21:30:35Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-16894"
},
{
"type": "WEB",
"url": "https://www.ibm.com/support/pages/node/7283858"
}
],
"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"
}
]
}
Mitigation MIT-3
Strategy: Language Selection
- Use a language that does not allow this weakness to occur or provides constructs that make this weakness easier to avoid.
- For example, many languages that perform their own memory management, such as Java and Perl, are not subject to buffer overflows. Other languages, such as Ada and C#, typically provide overflow protection, but the protection can be disabled by the programmer.
- Be wary that a language's interface to native code may still be subject to overflows, even if the language itself is theoretically safe.
Mitigation MIT-4.1
Strategy: Libraries or Frameworks
- Use a vetted library or framework that does not allow this weakness to occur or provides constructs that make this weakness easier to avoid.
- Examples include the Safe C String Library (SafeStr) by Messier and Viega [REF-57], and the Strsafe.h library from Microsoft [REF-56]. These libraries provide safer versions of overflow-prone string-handling functions.
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-9
- Consider adhering to the following rules when allocating and managing an application's memory:
- Double check that the buffer is as large as specified.
- When using functions that accept a number of bytes to copy, such as strncpy(), be aware that if the destination buffer size is equal to the source buffer size, it may not NULL-terminate the string.
- Check buffer boundaries if accessing the buffer in a loop and make sure there is no danger of writing past the allocated space.
- If necessary, truncate all input strings to a reasonable length before passing them to the copy and concatenation functions.
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 MIT-12
Strategy: Environment Hardening
- Use a CPU and operating system that offers Data Execution Protection (using hardware NX or XD bits) or the equivalent techniques that simulate this feature in software, such as PaX [REF-60] [REF-61]. These techniques ensure that any instruction executed is exclusively at a memory address that is part of the code segment.
- For more information on these techniques see D3-PSEP (Process Segment Execution Prevention) from D3FEND [REF-1336].
Mitigation MIT-13
Replace unbounded copy functions with analogous functions that support length arguments, such as strcpy with strncpy. Create these if they are not available.
No CAPEC attack patterns related to this CWE.