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().
4111 vulnerabilities reference this CWE, most recent first.
CVE-2026-9256 (GCVE-0-2026-9256)
Vulnerability from cvelistv5 – Published: 2026-05-22 14:11 – Updated: 2026-07-15 00:38 X_F5
VLAI
EPSS
VEX
Title
NGINX ngx_http_rewrite_module vulnerability
Summary
NGINX Plus and NGINX Open Source have a vulnerability in the ngx_http_rewrite_module module. This vulnerability exists when a rewrite directive uses a regex pattern with distinct, overlapping Perl-Compatible Regular Expression (PCRE) captures (for example, ^/((.*))$) and a replacement string that references multiple such captures (for example, $1$2) in a redirect or arguments context. An unauthenticated attacker along with conditions beyond their control can exploit this vulnerability by sending crafted HTTP requests. This may cause a heap buffer overflow in the NGINX worker process leading to a restart. Additionally, attackers can execute code on systems with Address Space Layout Randomization (ASLR) disabled or when the attacker can bypass ASLR.
Note: Software versions which have reached End of Technical Support (EoTS) are not evaluated.
Severity
8.1 (High)
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator (v2.0.3)
CWE
- CWE-122 - Heap-based Buffer Overflow
Assigner
References
13 references
| URL | Tags |
|---|---|
| https://my.f5.com/manage/s/article/K000161377 | vendor-advisory |
| http://www.openwall.com/lists/oss-security/2026/0… | |
| https://lists.debian.org/debian-lts-announce/2026… | |
| https://access.redhat.com/security/cve/CVE-2026-9256 | vdb-entryx_refsource_REDHAT |
| https://bugzilla.redhat.com/show_bug.cgi?id=2480746 | issue-trackingx_refsource_REDHAT |
| https://security.access.redhat.com/data/csaf/v2/v… | x_sadp-csaf-vex |
| https://access.redhat.com/errata/RHSA-2026:29874 | vendor-advisoryx_refsource_REDHAT |
| https://access.redhat.com/errata/RHSA-2026:28921 | vendor-advisoryx_refsource_REDHAT |
| https://access.redhat.com/errata/RHSA-2026:28212 | vendor-advisoryx_refsource_REDHAT |
| https://access.redhat.com/errata/RHSA-2026:28973 | vendor-advisoryx_refsource_REDHAT |
| https://access.redhat.com/errata/RHSA-2026:29151 | vendor-advisoryx_refsource_REDHAT |
| https://access.redhat.com/errata/RHSA-2026:33313 | vendor-advisoryx_refsource_REDHAT |
| https://access.redhat.com/errata/RHSA-2026:20351 | vendor-advisoryx_refsource_REDHAT |
Impacted products
10 products
| Vendor | Product | Version | |
|---|---|---|---|
| F5 | NGINX Plus |
Affected:
37.0 , < 37.0.1.1
(custom)
Affected: R36 , < R36 P5 (custom) Affected: R32 , < R32 P7 (custom) |
|
| F5 | NGINX Open Source |
Affected:
1.31.0 , < 1.31.1
(custom)
Affected: 1.30.0 , < 1.30.2 (custom) Affected: 0.1.17 , ≤ 0.9.7 (custom) |
|
| Red Hat | Red Hat Enterprise Linux 10 |
Unaffected:
2:1.26.3-6.el10_2.4 , < *
(rpm)
cpe:/o:redhat:enterprise_linux:10.2 |
|
| Red Hat | Red Hat Enterprise Linux 8 |
Unaffected:
8100020260611094050.489197e6 , < *
(rpm)
cpe:/a:redhat:enterprise_linux:8 |
|
| Red Hat | Red Hat Enterprise Linux 9 |
Unaffected:
9080020260610161820.9 , < *
(rpm)
cpe:/a:redhat:enterprise_linux:9 |
|
| Red Hat | Red Hat Enterprise Linux 9 |
Unaffected:
2:1.20.1-28.el9_8.3 , < *
(rpm)
cpe:/a:redhat:enterprise_linux:9 |
|
| Red Hat | Red Hat Enterprise Linux 9 |
Unaffected:
9080020260609152155.9 , < *
(rpm)
cpe:/a:redhat:enterprise_linux:9 |
|
| Red Hat | Red Hat Discovery 2 |
Unaffected:
1782756541 , < *
(rpm)
cpe:/a:redhat:discovery:2::el9 |
|
| Red Hat | Red Hat Hardened Images |
Unaffected:
1.30.2-1.hum1 , < *
(rpm)
cpe:/a:redhat:hummingbird:1 |
|
| Red Hat | Red Hat Lightspeed proxy 1 |
cpe:/a:redhat:insights_proxy:1 |
Date Public
2026-05-22 14:00
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CVE-2026-9149 (GCVE-0-2026-9149)
Vulnerability from cvelistv5 – Published: 2026-05-20 23:34 – Updated: 2026-06-26 23:16
VLAI
EPSS
VEX
Title
Libsolv: heap buffer overflow in libsolv repo_add_solv via negative maxsize from crafted .solv file
Summary
A flaw was found in libsolv. This heap buffer overflow vulnerability occurs when a victim processes a specially crafted `.solv` file containing negative size values in the `repo_add_solv` function. This leads to an undersized memory allocation and a subsequent out-of-bounds write. An attacker could exploit this to cause a denial of service (DoS).
Severity
6.5 (Medium)
SSVC
Exploitation: poc
Automatable: no
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
- CWE-122 - Heap-based Buffer Overflow
Assigner
References
5 references
| URL | Tags |
|---|---|
| https://access.redhat.com/errata/RHSA-2026:21333 | vendor-advisoryx_refsource_REDHAT |
| https://access.redhat.com/errata/RHSA-2026:28236 | vendor-advisoryx_refsource_REDHAT |
| https://access.redhat.com/security/cve/CVE-2026-9149 | vdb-entryx_refsource_REDHAT |
| https://bugzilla.redhat.com/show_bug.cgi?id=2460380 | issue-trackingx_refsource_REDHAT |
| https://github.com/openSUSE/libsolv/pull/617 |
Impacted products
8 products
| Vendor | Product | Version | |
|---|---|---|---|
| Red Hat | Red Hat Enterprise Linux 10 |
Unaffected:
0:0.7.33-5.el10_2 , < *
(rpm)
cpe:/o:redhat:enterprise_linux:10.2 |
|
| Red Hat | Red Hat Hardened Images |
Unaffected:
0.7.38-2.hum1 , < *
(rpm)
cpe:/a:redhat:hummingbird:1 |
|
| 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 OpenShift Container Platform 4 |
cpe:/a:redhat:openshift:4 |
|
| Red Hat | Red Hat Satellite 6 |
cpe:/a:redhat:satellite:6 |
|
| Red Hat | Red Hat Update Infrastructure 4 for Cloud Providers |
cpe:/a:redhat:rhui:4::el8 |
Date Public
2026-05-20 22:19
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CVE-2026-8997 (GCVE-0-2026-8997)
Vulnerability from cvelistv5 – Published: 2026-05-22 13:26 – Updated: 2026-05-22 15:03 X_Open Source
VLAI
EPSS
VEX
Title
Heap Buffer Overflow in vifm
Summary
vifm is vulnerable to a heap buffer overflow during the history merge process when saving the state file (vifminfo.json). This flaw occurs because the application lacks a runtime check on the length of history entries in release builds, potentially allowing a crafted long path or command in the history to cause memory corruption or application crashes.
Releases from 0.12.1 to 0.14.3 (including) are considered vulnerable. This issue was fixed in commit 23063c7
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
- CWE-122 - Heap-based Buffer Overflow
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://cert.pl/en/posts/2026/05/CVE-2026-8997 | third-party-advisory |
| https://github.com/vifm/vifm/commit/23063c741f15a… | patch |
Date Public
2026-05-22 12:56
Credits
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CVE-2026-8834 (GCVE-0-2026-8834)
Vulnerability from cvelistv5 – Published: 2026-05-26 17:10 – Updated: 2026-05-28 03:55
VLAI
EPSS
VEX
Title
IBM HTTP Server is affected by multiple vulnerabilities
Summary
IBM HTTP Server 8.5, and 9.0 contains a buffer overflow vulnerability. A privileged user, authenticated to the Administration Server, could exploit this vulnerability to execute remote code or cause a denial of service.
Severity
SSVC
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Automatable: no
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CISA Coordinator (v2.0.3)
CWE
- CWE-122 - Heap-based Buffer Overflow
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://www.ibm.com/support/pages/node/7274065 | vendor-advisorypatch |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| IBM | HTTP Server |
Affected:
8.5.0 , ≤ Interim Fix 002
(semver)
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CVE-2026-8711 (GCVE-0-2026-8711)
Vulnerability from cvelistv5 – Published: 2026-05-19 14:04 – Updated: 2026-05-21 18:29 X_F5
VLAI
EPSS
VEX
Title
NGINX JavaScript vulnerability
Summary
NGINX JavaScript has a vulnerability when the js_fetch_proxy directive is configured with at least one client-controlled NGINX variable (for example, $http_*, $arg_*, $cookie_*) and a location invoking the ngx.fetch() operation from NGINX JavaScript. An unauthenticated attacker can exploit this vulnerability by sending crafted HTTP requests. This may cause a heap buffer overflow in the NGINX worker process leading to a restart. Additionally, attackers can execute code on systems with Address Space Layout Randomization (ASLR) disabled or when the attacker can bypass ASLR.
Note: Software versions which have reached End of Technical Support (EoTS) are not evaluated.
Severity
8.1 (High)
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator (v2.0.3)
CWE
- CWE-122 - Heap-based Buffer Overflow
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://my.f5.com/manage/s/article/K000161307 | vendor-advisory |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| F5 | NGINX JavaScript |
Affected:
0.9.4 , < 0.9.9
(custom)
|
Date Public
2026-05-19 14:00
Credits
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CVE-2026-8631 (GCVE-0-2026-8631)
Vulnerability from cvelistv5 – Published: 2026-05-20 20:11 – Updated: 2026-07-15 00:39
VLAI
EPSS
VEX
Title
HP Linux Imaging and Printing Software – Potential Escalation of Privilege and Arbitrary Code Execution
Summary
A potential security vulnerability has been identified in the HP Linux Imaging and Printing Software. This potential vulnerability may allow escalation of privileges and/or arbitrary code execution via an integer overflow in the hpcups processing path when handling crafted print data.
Severity
9.8 (Critical)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: total
CISA Coordinator (v2.0.3)
Assigner
References
7 references
| URL | Tags |
|---|---|
| https://support.hp.com/us-en/document/ish_1494209… | |
| https://access.redhat.com/security/cve/CVE-2026-8631 | vdb-entryx_refsource_REDHAT |
| https://bugzilla.redhat.com/show_bug.cgi?id=2480300 | issue-trackingx_refsource_REDHAT |
| https://security.access.redhat.com/data/csaf/v2/v… | x_sadp-csaf-vex |
| https://access.redhat.com/errata/RHSA-2026:26228 | vendor-advisoryx_refsource_REDHAT |
| https://access.redhat.com/errata/RHSA-2026:26335 | vendor-advisoryx_refsource_REDHAT |
| https://access.redhat.com/errata/RHSA-2026:26297 | vendor-advisoryx_refsource_REDHAT |
Impacted products
6 products
| Vendor | Product | Version | |
|---|---|---|---|
| HP Inc | HP Linux Imaging and Printing Software |
Affected:
0 , < 3.26.4
(custom)
|
|
| Red Hat | Red Hat Enterprise Linux 10 |
Unaffected:
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(rpm)
cpe:/o:redhat:enterprise_linux:10.2 |
|
| Red Hat | Red Hat Enterprise Linux 8 |
Unaffected:
0:3.18.4-13.el8_10 , < *
(rpm)
cpe:/a:redhat:enterprise_linux:8 |
|
| Red Hat | Red Hat Enterprise Linux 9 |
Unaffected:
0:3.21.2-6.el9_8.4 , < *
(rpm)
cpe:/a:redhat:enterprise_linux:9 |
|
| 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 |
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CVE-2026-8484 (GCVE-0-2026-8484)
Vulnerability from cvelistv5 – Published: 2026-06-16 10:32 – Updated: 2026-06-16 12:15 X_Open Source Unsupported When Assigned
VLAI
EPSS
VEX
Title
Heap buffer overflow in Jansi
Summary
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All versions are believed to be vulnerable. This project is unmaintained at the time of CVE assignment.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
- CWE-122 - Heap-based Buffer Overflow
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://cert.pl/en/posts/2026/06/CVE-2026-8484 | third-party-advisory |
| https://github.com/fusesource/jansi/tree/master | product |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| FuseSource | jansi |
Affected:
0 , ≤ 2.4.3
(semver)
|
Date Public
2026-06-16 10:32
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CVE-2026-8261 (GCVE-0-2026-8261)
Vulnerability from cvelistv5 – Published: 2026-05-11 01:30 – Updated: 2026-05-11 14:26
VLAI
EPSS
VEX
Title
Squirrel sqobject.cpp Load heap-based overflow
Summary
A vulnerability was determined in Squirrel up to 3.2. This affects the function SQFunctionProto::Load of the file squirrel/sqobject.cpp. This manipulation causes heap-based buffer overflow. The attack is restricted to local execution. The exploit has been publicly disclosed and may be utilized. The project was informed of the problem early through an issue report but has not responded yet.
Severity
SSVC
Exploitation: poc
Automatable: no
Technical Impact: partial
CISA Coordinator (v2.0.3)
Assigner
References
5 references
| URL | Tags |
|---|---|
| https://vuldb.com/vuln/362558 | vdb-entrytechnical-description |
| https://vuldb.com/vuln/362558/cti | signaturepermissions-required |
| https://vuldb.com/submit/809904 | third-party-advisory |
| https://github.com/albertodemichelis/squirrel/iss… | issue-tracking |
| https://github.com/biniamf/pocs/tree/main/squirre… | exploit |
Impacted products
Credits
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CVE-2026-8213 (GCVE-0-2026-8213)
Vulnerability from cvelistv5 – Published: 2026-05-09 23:00 – Updated: 2026-05-11 17:31 X_Open Source
VLAI
EPSS
VEX
Title
OSGeo gdal Grid File GDapi.c GDSDfldsrch heap-based overflow
Summary
A vulnerability has been found in OSGeo gdal up to 3.13.0dev-4. Affected by this issue is the function GDSDfldsrch of the file frmts/hdf4/hdf-eos/GDapi.c of the component Grid File Handler. The manipulation leads to heap-based buffer overflow. An attack has to be approached locally. The exploit has been disclosed to the public and may be used. Upgrading to version 3.13.0RC1 can resolve this issue. The identifier of the patch is 3e04c0385630e4d42517046d9a4967dfccfeb7fd. It is suggested to upgrade the affected component.
Severity
SSVC
Exploitation: poc
Automatable: no
Technical Impact: partial
CISA Coordinator (v2.0.3)
Assigner
References
8 references
| URL | Tags |
|---|---|
| https://vuldb.com/vuln/362430 | vdb-entrytechnical-description |
| https://vuldb.com/vuln/362430/cti | signaturepermissions-required |
| https://vuldb.com/submit/808128 | third-party-advisory |
| https://github.com/OSGeo/gdal/issues/14399 | issue-tracking |
| https://github.com/biniamf/pocs/tree/main/gdal-gd… | exploit |
| https://github.com/OSGeo/gdal/commit/3e04c0385630… | patch |
| https://github.com/OSGeo/gdal/releases/tag/v3.13.0RC1 | patch |
| https://github.com/OSGeo/gdal/ | product |
Impacted products
Credits
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CVE-2026-8212 (GCVE-0-2026-8212)
Vulnerability from cvelistv5 – Published: 2026-05-09 22:30 – Updated: 2026-05-11 14:56 X_Open Source
VLAI
EPSS
VEX
Title
OSGeo gdal SWapi.c SWSDfldsrch heap-based overflow
Summary
A flaw has been found in OSGeo gdal up to 3.13.0dev-4. Affected by this vulnerability is the function SWSDfldsrch of the file frmts/hdf4/hdf-eos/SWapi.c. Executing a manipulation can lead to heap-based buffer overflow. The attack requires local access. The exploit has been published and may be used. Upgrading to version 3.13.0RC1 addresses this issue. This patch is called 3e04c0385630e4d42517046d9a4967dfccfeb7fd. The affected component should be upgraded.
Severity
SSVC
Exploitation: poc
Automatable: no
Technical Impact: partial
CISA Coordinator (v2.0.3)
Assigner
References
8 references
| URL | Tags |
|---|---|
| https://vuldb.com/vuln/362429 | vdb-entrytechnical-description |
| https://vuldb.com/vuln/362429/cti | signaturepermissions-required |
| https://vuldb.com/submit/808127 | third-party-advisory |
| https://github.com/OSGeo/gdal/issues/14398 | issue-tracking |
| https://github.com/biniamf/pocs/tree/main/gdal-sw… | exploit |
| https://github.com/OSGeo/gdal/commit/3e04c0385630… | patch |
| https://github.com/OSGeo/gdal/releases/tag/v3.13.0RC1 | patch |
| https://github.com/OSGeo/gdal/ | product |
Impacted products
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},
"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.