CVE-2025-11964 Details
Description
On Windows only, if libpcap needs to convert a Windows error message to UTF-8 and the message includes characters that UTF-8 represents using 4 bytes, utf_16le_to_utf_8_truncated() can write data beyond the end of the provided buffer.
A buffer overflow vulnerability has been identified in libpcap, specifically on Windows systems. The issue arises when libpcap attempts to convert a Windows error message to UTF-8. If the message contains characters that UTF-8 encodes using four bytes, the function 'utf_16le_to_utf_8_truncated()' can inadvertently write beyond the end of the allocated buffer. This vulnerability affects libpcap versions prior to 1.10.6.
Users can upgrade to libpcap version 1.10.6 or later to address this vulnerability.
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 Dec 31, 2025CISA-ADP
Assessed Jan 2, 2026References to Advisories, Solutions, and Tools
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| URL | Source(s) | Tag(s) |
|---|---|---|
| https://github.com/the-tcpdump-group/libpcap/commit/7fabf607f2319a36a0bd78444247180acb838e69 | [email protected] | Source CodeVendor |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-787 | Out-of-bounds Write | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| libpcap | < 1.10.6 (semver) |
CPE
Remediation
| |
Change History
3 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Jun 17, 2026 | CVE Modified | [email protected] |
| Jun 17, 2026 | CVE Modified | CISA-ADP |
| Dec 31, 2025 | New CVE Received | [email protected] |