CVE-2023-43683 Details
Description
An issue was discovered in Malwarebytes 4.6.14.326 and before 5.1.5.116 (and Nebula 2020-10-21 and later). A Stack buffer out-of-bounds access exists because of an integer underflow when handling newline characters.
A stack buffer out-of-bounds access vulnerability has been identified in Malwarebytes versions 4.6.14.326 and prior, as well as in Malwarebytes 5 versions prior to 5.1.5.116. This issue also affects the Nebula platform in versions through June 2024. The vulnerability arises from an integer underflow when processing newline characters, which can be exploited to cause a heap-based buffer overflow.
Users are advised to upgrade to Malwarebytes 4 versions 4.6.14.326 and later, or Malwarebytes 5 versions 5.1.5.116 and later. For the Nebula platform, upgrade to version 2.0.0.64 or later for the Endpoint Agent, and version 4.6.17.334 or later for the Protection Service.
Metrics
CVSS 4.0 Severity and Vector Strings:
VolerionCVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
Volerion
Assessed Aug 14, 2025CISA-ADP
Assessed Aug 15, 2025References to Advisories, Solutions, and Tools
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| URL | Source(s) | Tag(s) |
|---|---|---|
| https://www.malwarebytes.com/secure/cves/cve-2023-43683 | [email protected] | AdvisoryRemedyVendor |
Weakness Enumeration
Affected Products
| Product | Versions |
|---|---|
| Malwarebytes | < 4.6.14.326 < 5.1.5.116 |
CPE
Remediation
| |
| Malwarebytes Nebula | All versions |
CPE
Remediation
| |
Change History
4 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Jun 17, 2026 | CVE Modified | [email protected] |
| Jun 17, 2026 | CVE Modified | CISA-ADP |
| Aug 15, 2025 | CVE Modified | CISA-ADP |
| Aug 14, 2025 | New CVE Received | [email protected] |