Heap-based buffer overflow in libpcap - CVE-2025-11961
Published: January 5, 2026
Vulnerability identifier: #VU120924
CSH Severity: Low
CVSS v4.0: CVSS:4.0/AV:L/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear
CVE-ID: CVE-2025-11961
CWE-ID: CWE-122
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vendor: Tcpdump.org
Affected software:
libpcap
libpcap
Detailed vulnerability description
The vulnerability allows a local user to escalate privileges on the system.
The vulnerability exists due to a boundary error within the pcap_ether_aton() function in nametoaddr.c. A local privileged user can trigger a heap-based buffer overflow and execute arbitrary code on the target system.
How to mitigate CVE-2025-11961
Install updates from vendor's website.