Common Weakness Enumeration

CWE-761

Allowed

Free of Pointer not at Start of Buffer

Abstraction: Variant · Status: Incomplete

API response cwe.mitre.org

The product calls free() on a pointer to a memory resource that was allocated on the heap, but the pointer is not at the start of the buffer.

3 vulnerabilities reference this CWE, most recent first.

CVE-2025-47749 (GCVE-0-2025-47749)

Vulnerability from cvelistv5 – Published: 2025-05-19 07:43 – Updated: 2025-05-19 15:27
VLAI
Summary
V-SFT v6.2.5.0 and earlier contains an issue with free of pointer not at start of buffer in VS6EditData.dll!CWinFontInf::WinFontMsgCheck function. Opening specially crafted V7 or V8 files may lead to crash, information disclosure, and arbitrary code execution.
Severity
7.8 (High)
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
8.4 (High)
CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
  • CWE-761 - Free of pointer not at start of buffer
Assigner
References
Impacted products
Vendor Product Version
FUJI ELECTRIC CO., LTD. V-SFT Affected: v6.2.5.0 and earlier
Create a notification for this product.
Show details on NVD website
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                "timestamp": "2025-05-19T15:27:37.391930Z",
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GHSA-3599-WXPF-RM35

Vulnerability from github – Published: 2024-05-01 15:30 – Updated: 2024-07-03 18:38
VLAI
Details

Free of pointer not at start of buffer vulnerability exists in CX-One CX-One CXONE-AL[][]D-V4 (The version which was installed with a DVD ver. 4.61.1 or lower, and was updated through CX-One V4 auto update in January 2024 or prior) and Sysmac Studio SYSMAC-SE2[][][] (The version which was installed with a DVD ver. 1.56 or lower, and was updated through Sysmac Studio V1 auto update in January 2024 or prior). Opening a specially crafted project file may lead to arbitrary code execution.

Severity
5.9 (Medium)
CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L
Show details on source website
To clipboard 

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  "affected": [],
  "aliases": [
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    "nvd_published_at": "2024-05-01T13:15:52Z",
    "severity": "MODERATE"
  },
  "details": "Free of pointer not at start of buffer vulnerability exists in CX-One CX-One CXONE-AL[][]D-V4 (The version which was installed with a DVD ver. 4.61.1 or lower, and was updated through CX-One V4 auto update in January 2024 or prior) and Sysmac Studio SYSMAC-SE2[][][] (The version which was installed with a DVD ver. 1.56 or lower, and was updated through Sysmac Studio V1 auto update in January 2024 or prior). Opening a specially crafted project file may lead to arbitrary code execution.",
  "id": "GHSA-3599-wxpf-rm35",
  "modified": "2024-07-03T18:38:04Z",
  "published": "2024-05-01T15:30:37Z",
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      "url": "https://nvd.nist.gov/vuln/detail/CVE-2024-31413"
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      "type": "WEB",
      "url": "https://jvn.jp/en/vu/JVNVU98274902"
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      "type": "CVSS_V3"
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}

GHSA-MR4J-XFV9-W967

Vulnerability from github – Published: 2025-05-19 09:31 – Updated: 2025-05-19 09:31
VLAI
Details

V-SFT v6.2.5.0 and earlier contains an issue with free of pointer not at start of buffer in VS6EditData.dll!CWinFontInf::WinFontMsgCheck function. Opening specially crafted V7 or V8 files may lead to crash, information disclosure, and arbitrary code execution.

Severity
7.8 (High)
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
8.4 (High)
CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
Show details on source website
To clipboard 

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  "modified": "2025-05-19T09:31:09Z",
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      "type": "CVSS_V4"
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}
Mitigation
Implementation

When utilizing pointer arithmetic to traverse a buffer, use a separate variable to track progress through memory and preserve the originally allocated address for later freeing.

Mitigation
Implementation

When programming in C++, consider using smart pointers provided by the boost library to help correctly and consistently manage memory.

Mitigation MIT-4.6
Architecture and Design

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.
  • For example, glibc in Linux provides protection against free of invalid pointers.
Mitigation
Architecture and Design

Use a language that provides abstractions for memory allocation and deallocation.

No CAPEC attack patterns related to this CWE.

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