CVE-2025-45663 Details
Description
An issue in NetSurf v3.11 causes the application to read uninitialized heap memory when creating a dom_event structure.
A vulnerability in NetSurf version 3.11 has been identified, where the application improperly handles uninitialized heap memory in the DOM event structure. This issue arises in the event initialization function, which fails to properly initialize several fields that are accessible to JavaScript. As a result, these fields can inadvertently leak memory addresses, potentially serving as a primitive for further exploitation.
Users can upgrade to NetSurf versions later than 3.11 to address this vulnerability.
Metrics
CVSS 4.0 Severity and Vector Strings:
No CVSS 4.0 data is available for this CVE.
CVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
CISA-ADP
Assessed Nov 3, 2025References to Advisories, Solutions, and Tools
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| URL | Source(s) | Tag(s) |
|---|---|---|
| https://github.com/Fysac/netsurf-disclosure/tree/main/CVE-2025-45663 | [email protected] | ExploitThird Party Advisory |
| https://www.netsurf-browser.org/ | [email protected] | Product |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-244 | Improper Clearing of Heap Memory Before Release ('Heap Inspection') | CISA-ADP |
Affected Products
| Product | Versions |
|---|---|
| netsurf-browser netsurf | 3.11 |
CPE
Remediation
| |
Change History
6 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Jun 17, 2026 | CVE Modified | [email protected] |
| Jun 17, 2026 | CVE Modified | CISA-ADP |
| Nov 5, 2025 | Initial Analysis | [email protected] |
| Nov 4, 2025 | CVE Modified | [email protected] |
| Nov 3, 2025 | CVE Modified | CISA-ADP |
| Nov 3, 2025 | New CVE Received | [email protected] |