Common Weakness Enumeration
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().
5249 vulnerabilities reference this CWE, most recent first.
CVE-2026-18938 (GCVE-0-2026-18938)
Vulnerability from cvelistv5 – Published: 2026-08-07 08:19 – Updated: 2026-08-07 15:14
VLAI
EPSS
VEX
Title
P11-kit: integer overflow in rpc attribute-array length calculation can under-allocate nested attribute storage on 32 bit systems
Summary
A flaw was found in p11-kit. A local attacker, or one with equivalent access to a reachable RPC channel, could exploit an integer overflow vulnerability. By sending specially crafted messages, the attacker can cause the system to miscalculate memory allocation for nested attributes. This leads to a memory corruption issue, specifically a heap out-of-bounds write, which can crash the p11-kit RPC parsing process, resulting in a Denial of Service (DoS). This vulnerability is only exploitable on 32 bit systems.
Severity
6.2 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-07 15:14 UTC
CWE
- CWE-122 - Heap-based Buffer Overflow
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://access.redhat.com/security/cve/CVE-2026-18938 | vdb-entryx_refsource_REDHAT |
| https://bugzilla.redhat.com/show_bug.cgi?id=2478995 | issue-trackingx_refsource_REDHAT |
Impacted products
7 products
| Vendor | Product | Version | |
|---|---|---|---|
| Red Hat | Red Hat Enterprise Linux 10 |
cpe:/o:redhat:enterprise_linux:10
|
|
| Red Hat | Red Hat Enterprise Linux 6 |
cpe:/o:redhat:enterprise_linux:6
|
|
| Red Hat | Red Hat Enterprise Linux 7 |
cpe:/o:redhat:enterprise_linux:7
|
|
| Red Hat | Red Hat Enterprise Linux 8 |
cpe:/o:redhat:enterprise_linux:8
|
|
| Red Hat | Red Hat Enterprise Linux 9 |
cpe:/o:redhat:enterprise_linux:9
|
|
| Red Hat | Red Hat Hardened Images |
cpe:/a:redhat:hummingbird:1
|
|
| Red Hat | Red Hat OpenShift Container Platform 4 |
cpe:/a:redhat:openshift:4
|
Date Public
2026-08-07 08:13
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CVE-2026-18784 (GCVE-0-2026-18784)
Vulnerability from cvelistv5 – Published: 2026-08-04 16:30 – Updated: 2026-08-05 14:55
VLAI
EPSS
VEX
Title
o6 open62541 ua_client_highlevel.c UA_Client_readNodeClassAttribute heap-based overflow
Summary
A vulnerability was found in o6 open62541 up to 1.5.5. This issue affects the function UA_Client_readNodeClassAttribute of the file src/client/ua_client_highlevel.c. Performing a manipulation results in heap-based buffer overflow. Attacking locally is a requirement. The exploit has been made public and could be used. The project closed the issue report, stating that this is not the official way to report a security vulnerability.
Severity
SSVC
Exploitation: poc
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-05 14:55 UTC
Assigner
References
6 references
| URL | Tags |
|---|---|
| https://vuldb.com/vuln/385786 | vdb-entrytechnical-description |
| https://vuldb.com/vuln/385786/cti | signaturepermissions-required |
| https://vuldb.com/cve/CVE-2026-18784 | third-party-advisory |
| https://vuldb.com/submit/857012 | third-party-advisory |
| https://github.com/open62541/open62541/issues/8139 | issue-tracking |
| https://github.com/gff-cw/information/issues/11 | exploitissue-tracking |
Impacted products
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CVE-2026-18585 (GCVE-0-2026-18585)
Vulnerability from cvelistv5 – Published: 2026-08-03 05:15 – Updated: 2026-08-03 13:21
VLAI
EPSS
VEX
Title
GL.iNet MT2500 APPS-NAS nas-web.get_file_list heap-based overflow
Summary
A vulnerability was detected in GL.iNet MT3000, MT6000, BE9300, BE3600, MT3600BE, E5800, BE6500, MT5000, X3000, XE3000 and MT2500 up to 20260707. The affected element is the function nas-web.get_file_list of the component APPS-NAS Module. Performing a manipulation results in heap-based buffer overflow. The attack may be initiated remotely. The vendor was contacted early about this disclosure and confirmed the existence of the vulnerability.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-03 13:20 UTC
Assigner
References
5 references
| URL | Tags |
|---|---|
| https://vuldb.com/vuln/385414 | vdb-entrytechnical-description |
| https://vuldb.com/vuln/385414/cti | signaturepermissions-required |
| https://vuldb.com/cve/CVE-2026-18585 | third-party-advisory |
| https://vuldb.com/submit/849290 | third-party-advisory |
| https://github.com/gl-inet/CVE-issues/blob/main/4… | related |
Impacted products
11 products
| Vendor | Product | Version | |
|---|---|---|---|
| GL.iNet | MT3000 |
Affected:
20260707
cpe:2.3:a:gl.inet:mt3000:*:*:*:*:*:*:*:* |
|
| GL.iNet | MT6000 |
Affected:
20260707
cpe:2.3:a:gl.inet:mt6000:*:*:*:*:*:*:*:* |
|
| GL.iNet | BE9300 |
Affected:
20260707
cpe:2.3:a:gl.inet:be9300:*:*:*:*:*:*:*:* |
|
| GL.iNet | BE3600 |
Affected:
20260707
cpe:2.3:a:gl.inet:be3600:*:*:*:*:*:*:*:* |
|
| GL.iNet | MT3600BE |
Affected:
20260707
cpe:2.3:a:gl.inet:mt3600be:*:*:*:*:*:*:*:* |
|
| GL.iNet | E5800 |
Affected:
20260707
cpe:2.3:a:gl.inet:e5800:*:*:*:*:*:*:*:* |
|
| GL.iNet | BE6500 |
Affected:
20260707
cpe:2.3:a:gl.inet:be6500:*:*:*:*:*:*:*:* |
|
| GL.iNet | MT5000 |
Affected:
20260707
cpe:2.3:a:gl.inet:mt5000:*:*:*:*:*:*:*:* |
|
| GL.iNet | X3000 |
Affected:
20260707
cpe:2.3:a:gl.inet:x3000:*:*:*:*:*:*:*:* |
|
| GL.iNet | XE3000 |
Affected:
20260707
cpe:2.3:a:gl.inet:xe3000:*:*:*:*:*:*:*:* |
|
| GL.iNet | MT2500 |
Affected:
20260707
cpe:2.3:a:gl.inet:mt2500:*:*:*:*:*:*:*:* |
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CVE-2026-18495 (GCVE-0-2026-18495)
Vulnerability from cvelistv5 – Published: 2026-09-11 17:41 – Updated: 2026-09-11 17:56
VLAI
EPSS
VEX
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)
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
References
5 references
| URL | Tags |
|---|---|
| https://access.redhat.com/errata/RHSA-2026:53467 | vendor-advisoryx_refsource_REDHAT |
| https://access.redhat.com/security/cve/CVE-2026-18495 | vdb-entryx_refsource_REDHAT |
| https://bugzilla.redhat.com/show_bug.cgi?id=2531414 | issue-trackingx_refsource_REDHAT |
| https://gitlab.com/libtiff/libtiff/-/merge_requests/729 | |
| https://gitlab.com/libtiff/libtiff/-/tree/67fd283… |
Impacted products
12 products
| Vendor | Product | Version | |
|---|---|---|---|
| Red Hat | Red Hat Hardened Images |
Unaffected:
4.7.2-2.hum1 , < *
(rpm)
cpe:/a:redhat:hummingbird:1 |
|
| Red Hat | Red Hat Ceph Storage 4 |
cpe:/a:redhat:ceph_storage:4
|
|
| Red Hat | Red Hat Ceph Storage 6 |
cpe:/a:redhat:ceph_storage:6
|
|
| Red Hat | Red Hat Ceph Storage 7 |
cpe:/a:redhat:ceph_storage:7
|
|
| Red Hat | Red Hat Ceph Storage 8 |
cpe:/a:redhat:ceph_storage:8
|
|
| Red Hat | Red Hat Ceph Storage 9 |
cpe:/a:redhat:ceph_storage:9
|
|
| Red Hat | Red Hat Enterprise Linux 10 |
cpe:/o:redhat:enterprise_linux:10
|
|
| Red Hat | Red Hat Enterprise Linux 6 |
cpe:/o:redhat:enterprise_linux:6
|
|
| Red Hat | Red Hat Enterprise Linux 7 |
cpe:/o:redhat:enterprise_linux:7
|
|
| Red Hat | Red Hat Enterprise Linux 8 |
cpe:/o:redhat:enterprise_linux:8
|
|
| Red Hat | Red Hat Enterprise Linux 9 |
cpe:/o:redhat:enterprise_linux:9
|
|
| Red Hat | Red Hat Hardened Images |
cpe:/a:redhat:hummingbird:1
|
Date Public
2026-08-20 00:00
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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
EPSS
VEX
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
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
References
3 references
| URL | Tags |
|---|---|
| https://cert.pl/en/posts/2026/08/CVE-2026-18370 | third-party-advisory |
| https://eradman.com/entrproject/ | product |
| https://github.com/eradman/entr/commit/2467fe0aa5… | patch |
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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
EPSS
VEX
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
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
References
1 reference
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Teltonika Networks | RUTOS |
Affected:
7.12.0 , ≤ 7.24.1
(semver)
|
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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
EPSS
VEX
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)
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
References
1 reference
| URL | Tags |
|---|---|
| https://www.ibm.com/support/pages/node/7286094 | vendor-advisorypatch |
Impacted products
1 product
| 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:*:*:*:*:*:*:* |
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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
EPSS
VEX
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)
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
References
2 references
| URL | Tags |
|---|---|
| https://www.zerodayinitiative.com/advisories/ZDI-… | x_research-advisory |
| https://gitlab.gnome.org/GNOME/gimp/-/commit/bace… | vendor-advisory |
Date Public
2026-07-29 21:28
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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
EPSS
VEX
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.
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Severity
7.8 (High)
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
References
2 references
| URL | Tags |
|---|---|
| https://www.zerodayinitiative.com/advisories/ZDI-… | x_research-advisory |
| https://gitlab.gnome.org/GNOME/gimp/-/commit/77e1… | vendor-advisory |
Date Public
2026-07-29 21:28
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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
EPSS
VEX
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)
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
References
2 references
| URL | Tags |
|---|---|
| https://www.zerodayinitiative.com/advisories/ZDI-… | x_research-advisory |
| https://gstreamer.freedesktop.org/security/sa-202… | vendor-advisory |
Impacted products
Date Public
2026-07-29 21:29
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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.