What’s Vulnerable › Vulnerabilities
CVE-2025-11961: OOBR and OOBW in pcap_ether_aton() in libpcap
- Severity: low (CVSS 1.9 v3.1)
- Exploited in the wild: not listed in CISA KEV
- EPSS: 0.1% probability of exploitation in the next 30 days
- Public exploit or detection template: none known
- Published: 2025-12-31 · updated 2026-06-17
- Weakness: CWE-122
Description
pcap_ether_aton() is an auxiliary function in libpcap, it takes a string argument and returns a fixed-size allocated buffer. The string argument must be a well-formed MAC-48 address in one of the supported formats, but this requirement has been poorly documented. If an application calls the function with an argument that deviates from the expected format, the function can read data beyond the end of the provided string and write data beyond the end of the allocated buffer.
Affected products
- The Tcpdump Group libpcap: before 1.10.6 — fixed in 1.10.6
How to fix
Upgrade to a fixed version: The Tcpdump Group libpcap 1.10.6. Check the vendor advisory for mitigations.
References
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