Common Weakness Enumeration

CWE-122

Allowed

Heap-based Buffer Overflow

Abstraction: Variant · Status: Draft

API response cwe.mitre.org

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().

5429 vulnerabilities reference this CWE, most recent first.

CVE-2026-18495 (GCVE-0-2026-18495)

Vulnerability from cvelistv5 – Published: 2026-09-11 17:41 – Updated: 2026-10-07 17:41
VLAI
Title
Libtiff: libtiff: heap-buffer overflow via numeric truncation in the jpeg raw passthrough
Summary
A flaw was found in libtiff. A heap-buffer overflow vulnerability exists in the `tiff2pdf` utility due to an integer truncation error when processing crafted BigTIFF files. An attacker can provide a specially crafted BigTIFF file, causing a 64-bit `StripByteCounts` value to be truncated to a 32-bit integer. This leads to an undersized memory allocation and a subsequent out-of-bounds memory copy, resulting in a crash and severe memory corruption.
Severity
6.1 (Medium)
CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:L/I:L/A:H
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-11 17:56 UTC
CWE
  • CWE-122 - Heap-based Buffer Overflow
Assigner
redhat CNA under the redhat root
CNA scorecard B 81/100 over 976 records in the last 180 days details
References
Impacted products
Date Public
2026-08-20 00:00
Credits
Red Hat would like to thank Jinbao Chen for reporting this issue.
Show details on NVD website
To clipboard 

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CVE-2026-18457 (GCVE-0-2026-18457)

Vulnerability from cvelistv5 – Published: 2026-09-22 17:50 – Updated: 2026-09-22 18:48
VLAI
Title
Heap-based Buffer Overflow vulnerability in RTI Connext Professional (Core Libraries) allows Overflow Buffers.
Summary
Heap-based Buffer Overflow vulnerability in RTI Connext Professional (Core Libraries) allows Overflow Buffers. This issue affects Connext Professional: from 7.4.0 before 7.7.0.1, from 7.0.0 before 7.3.1.6, from 6.1.0 before 6.1.*, from 6.0.0 before 6.0.*, from 5.3.0 before 5.3.*, from 5.2.3 before 5.2.*.
Severity
8.3 (High)
CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:H/VA:H/SC:N/SI:N/SA:N
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-22 18:48 UTC
CWE
  • CWE-122 - Heap-based Buffer Overflow
Assigner
RTI CNA under the mitre root
CNA scorecard B 81/100 over 20 records in the last 180 days details
References
Impacted products
Vendor Product Version
RTI Connext Professional Affected: 7.4.0 , < 7.7.0.1 (custom)
Affected: 7.0.0 , < 7.3.1.6 (custom)
Affected: 6.1.0 , < 6.1.* (custom)
Affected: 6.0.0 , < 6.0.* (custom)
Affected: 5.3.0 , < 5.3.* (custom)
Affected: 5.2.3 , < 5.2.* (custom)
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Create a notification for this product.
Date Public
2026-09-15 17:47
Show details on NVD website
To clipboard 

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CVE-2026-18370 (GCVE-0-2026-18370)

Vulnerability from cvelistv5 – Published: 2026-08-10 12:56 – Updated: 2026-08-10 17:59 X_Open Source
VLAI
Title
Heap-based buffer overflow in entr
Summary
entr is vulnerable to Heap-based buffer overflow in run_utility() function. The function allocates a fixed-size heap buffer using malloc(ARG_MAX) and copies command-line arguments into it. It advances the destination pointer based on the return value of strlcpy(), which returns the total length of the source string rather than the number of bytes written. When the buffer is exactly filled, the remaining size underflows as an unsigned size_t, causing subsequent copies to write out of bounds. This can be triggered by supplying command-line arguments whose combined length fills the buffer, or via the /_ substitution feature which expands a short token into a longer pathname at runtime. The local attacker can cause memory corruption, process abort, and denial of service.  This issue was fixed in commit 2467fe0
Severity
4.8 (Medium)
CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:L/SC:N/SI:N/SA:N
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-10 17:58 UTC
CWE
  • CWE-122 - Heap-based buffer overflow
Assigner
CERT-PL CNA under the ENISA root
CNA scorecard B 81/100 over 220 records in the last 180 days details
References
Impacted products
Vendor Product Version
eradman entr Affected: 0 , ≤ 5.8 (git)
Create a notification for this product.
Credits
Michał Majchrowicz (AFINE Team) Marcin Wyczechowski (AFINE Team)
Show details on NVD website
To clipboard 

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CVE-2026-18368 (GCVE-0-2026-18368)

Vulnerability from cvelistv5 – Published: 2026-08-13 10:52 – Updated: 2026-08-13 14:43
VLAI
Title
Heap buffer overflow in Modbusgwd
Summary
In Teltonika Networks RUTOS devices, a vulnerability exists in modbusgwd due to improper handling of Modbus TCP request data. A remote, unauthenticated attacker with access to the affected service could trigger a heap-based buffer overflow, resulting in a denial of service.
Severity
6 (Medium)
CVSS:4.0/AV:A/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-13 14:42 UTC
CWE
  • CWE-122 - Heap-based Buffer Overflow
Assigner
tlt_net CNA under the icscert root
CNA scorecard – unranked: 3 records in the last 180 days, 10 needed details
References
Impacted products
Vendor Product Version
Teltonika Networks RUTOS Affected: 7.12.0 , ≤ 7.24.1 (semver)
Create a notification for this product.
Show details on NVD website
To clipboard 

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CVE-2026-18341 (GCVE-0-2026-18341)

Vulnerability from cvelistv5 – Published: 2026-09-04 16:25 – Updated: 2026-09-04 16:44
VLAI
Title
IBM i is Affected By Buffer Overflow Vulnerability []
Summary
IBM i 7.6, 7.5, 7.4, and 7.3 could allow a remote authenticated attacker to corrupt memory due to an integer underflow.
Severity
6.3 (Medium)
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-04 16:43 UTC
CWE
  • CWE-122 - Heap-based Buffer Overflow
Assigner
ibm CNA under the mitre root
CNA scorecard B 88/100 over 1165 records in the last 180 days details
References
URL Tags
https://www.ibm.com/support/pages/node/7286094 vendor-advisorypatch
Impacted products
Vendor Product Version
IBM i Affected: 7.6
Affected: 7.5
Affected: 7.4
Affected: 7.3
    cpe:2.3:a:ibm:i:7.6:*:*:*:*:*:*:*
    cpe:2.3:a:ibm:i:7.6.0:*:*:*:*:*:*:*
    cpe:2.3:a:ibm:i:7.5:*:*:*:*:*:*:*
    cpe:2.3:a:ibm:i:7.5.0:*:*:*:*:*:*:*
    cpe:2.3:a:ibm:i:7.4:*:*:*:*:*:*:*
    cpe:2.3:a:ibm:i:7.4.0:*:*:*:*:*:*:*
    cpe:2.3:a:ibm:i:7.3:*:*:*:*:*:*:*
    cpe:2.3:a:ibm:i:7.3.0:*:*:*:*:*:*:*
Create a notification for this product.
Show details on NVD website
To clipboard 

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CVE-2026-18307 (GCVE-0-2026-18307)

Vulnerability from cvelistv5 – Published: 2026-08-20 16:23 – Updated: 2026-08-27 16:24
VLAI
Title
GIMP TIF File Parsing Heap-based Buffer Overflow Remote Code Execution Vulnerability
Summary
GIMP TIF File Parsing Heap-based Buffer Overflow Remote Code Execution Vulnerability. This vulnerability allows remote attackers to execute arbitrary code on affected installations of GIMP. 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 TIF 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-29404.
Severity
7.8 (High)
CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
SSVC
Exploitation: none Automatable: no Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-21 03:57 UTC
CWE
  • CWE-122 - Heap-based Buffer Overflow
Assigner
zdi CNA under the mitre root
CNA scorecard C 73/100 over 108 records in the last 180 days details
References
Impacted products
Vendor Product Version
GIMP GIMP Affected: 3.2.2
Create a notification for this product.
Date Public
2026-07-29 21:28
Show details on NVD website
To clipboard 

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CVE-2026-18302 (GCVE-0-2026-18302)

Vulnerability from cvelistv5 – Published: 2026-08-20 16:23 – Updated: 2026-08-27 16:24
VLAI
Title
GIMP TIF File Parsing Heap-based Buffer Overflow Remote Code Execution Vulnerability
Summary
GIMP TIF File Parsing Heap-based Buffer Overflow Remote Code Execution Vulnerability. This vulnerability allows remote attackers to execute arbitrary code on affected installations of GIMP. 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 TIF 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-29398.
Severity
7.8 (High)
CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
SSVC
Exploitation: none Automatable: no Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-21 03:57 UTC
CWE
  • CWE-122 - Heap-based Buffer Overflow
Assigner
zdi CNA under the mitre root
CNA scorecard C 73/100 over 108 records in the last 180 days details
References
Impacted products
Vendor Product Version
GIMP GIMP Affected: 3.2.2
Create a notification for this product.
Date Public
2026-07-29 21:28
Show details on NVD website
To clipboard 

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CVE-2026-18298 (GCVE-0-2026-18298)

Vulnerability from cvelistv5 – Published: 2026-08-20 16:22 – Updated: 2026-08-27 16:24
VLAI
Title
GStreamer PNG File Parsing Heap-based Buffer Overflow Remote Code Execution Vulnerability
Summary
GStreamer PNG File Parsing Heap-based Buffer Overflow Remote Code Execution Vulnerability. This vulnerability allows remote attackers to execute arbitrary code on affected installations of GStreamer. 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 PNG 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-29581.
Severity
7.8 (High)
CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
SSVC
Exploitation: none Automatable: no Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-21 03:57 UTC
CWE
  • CWE-122 - Heap-based Buffer Overflow
Assigner
zdi CNA under the mitre root
CNA scorecard C 73/100 over 108 records in the last 180 days details
References
Impacted products
Vendor Product Version
GStreamer GStreamer Affected: 13fcb641ed33d1472e4ffdec2846180b15405053
Create a notification for this product.
Date Public
2026-07-29 21:29
Show details on NVD website
To clipboard 

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CVE-2026-18296 (GCVE-0-2026-18296)

Vulnerability from cvelistv5 – Published: 2026-08-20 16:22 – Updated: 2026-08-27 16:24
VLAI
Title
GStreamer MRF File Parsing Heap-based Buffer Overflow Remote Code Execution Vulnerability
Summary
GStreamer MRF File Parsing Heap-based Buffer Overflow Remote Code Execution Vulnerability. This vulnerability allows remote attackers to execute arbitrary code on affected installations of GStreamer. 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 MRF 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-29608.
Severity
7.8 (High)
CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
SSVC
Exploitation: none Automatable: no Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-21 03:57 UTC
CWE
  • CWE-122 - Heap-based Buffer Overflow
Assigner
zdi CNA under the mitre root
CNA scorecard C 73/100 over 108 records in the last 180 days details
References
Impacted products
Vendor Product Version
GStreamer GStreamer Affected: 13fcb641ed33d1472e4ffdec2846180b15405053
Create a notification for this product.
Date Public
2026-07-29 21:29
Show details on NVD website
To clipboard 

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CVE-2026-18282 (GCVE-0-2026-18282)

Vulnerability from cvelistv5 – Published: 2026-08-20 16:19 – Updated: 2026-08-21 20:08
VLAI
Title
Sony XAV-9500ES AVRCP_Br_Response_Parser Heap-based Buffer Overflow Remote Code Execution Vulnerability
Summary
Sony XAV-9500ES AVRCP_Br_Response_Parser Heap-based Buffer Overflow Remote Code Execution Vulnerability. This vulnerability allows network-adjacent attackers to execute arbitrary code on affected installations of Sony XAV-9500ES devices. An attacker must first obtain the ability to pair a malicious Bluetooth device with the target system in order to exploit this vulnerability. The specific flaw exists within the handling of AVRCP packets. 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 device. Was ZDI-CAN-28995.
Severity
8 (High)
CVSS:3.0/AV:A/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
SSVC
Exploitation: none Automatable: no Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-21 19:54 UTC
CWE
  • CWE-122 - Heap-based Buffer Overflow
Assigner
zdi CNA under the mitre root
CNA scorecard C 73/100 over 108 records in the last 180 days details
References
Impacted products
Vendor Product Version
Sony XAV-9500ES Affected: 3.02.00
Create a notification for this product.
Date Public
2026-07-29 21:42
Show details on NVD website
To clipboard 

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      }
    ],
    "cna": {
      "affected": [
        {
          "defaultStatus": "unknown",
          "product": "XAV-9500ES",
          "vendor": "Sony",
          "versions": [
            {
              "status": "affected",
              "version": "3.02.00"
            }
          ]
        }
      ],
      "dateAssigned": "2026-07-29T17:06:02.198Z",
      "datePublic": "2026-07-29T21:42:22.289Z",
      "descriptions": [
        {
          "lang": "en",
          "value": "Sony XAV-9500ES AVRCP_Br_Response_Parser Heap-based Buffer Overflow Remote Code Execution Vulnerability. This vulnerability allows network-adjacent attackers to execute arbitrary code on affected installations of Sony XAV-9500ES devices. An attacker must first obtain the ability to pair a malicious Bluetooth device with the target system in order to exploit this vulnerability.\n\nThe specific flaw exists within the handling of AVRCP packets. 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 device. Was ZDI-CAN-28995."
        }
      ],
      "metrics": [
        {
          "cvssV3_0": {
            "baseScore": 8,
            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.0/AV:A/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H",
            "version": "3.0"
          },
          "format": "CVSS"
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-122",
              "description": "CWE-122: Heap-based Buffer Overflow",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-08-20T16:19:29.470Z",
        "orgId": "99f1926a-a320-47d8-bbb5-42feb611262e",
        "shortName": "zdi"
      },
      "references": [
        {
          "name": "ZDI-26-475",
          "tags": [
            "x_research-advisory"
          ],
          "url": "https://www.zerodayinitiative.com/advisories/ZDI-26-475/"
        },
        {
          "name": "vendor-provided URL",
          "tags": [
            "vendor-advisory"
          ],
          "url": "https://www.sony.com/electronics/support/mobile-cd-players-digital-media-players-xav-series/xav-9500es/software/00274922"
        }
      ],
      "source": {
        "lang": "en",
        "value": "Viettel Cyber Security (@vcslab)"
      },
      "title": "Sony XAV-9500ES AVRCP_Br_Response_Parser Heap-based Buffer Overflow Remote Code Execution Vulnerability"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "99f1926a-a320-47d8-bbb5-42feb611262e",
    "assignerShortName": "zdi",
    "cveId": "CVE-2026-18282",
    "datePublished": "2026-08-20T16:19:29.470Z",
    "dateReserved": "2026-07-29T17:06:02.168Z",
    "dateUpdated": "2026-08-21T20:08:41.306Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}
Mitigation

Pre-design: Use a language or compiler that performs automatic bounds checking.

Mitigation
Architecture and Design

Use an abstraction library to abstract away risky APIs. Not a complete solution.

Mitigation MIT-10
Operation Build and Compilation

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
Operation Build and Compilation

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
Implementation

Implement and perform bounds checking on input.

Mitigation
Implementation

Strategy: Libraries or Frameworks

Do not use dangerous functions such as gets. Look for their safe equivalent, which checks for the boundary.

Mitigation
Operation

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.

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