Tcpdump Group libpcap up to 1.10.6 BPF Interpreter out-of-bounds

Summaryinfo

A vulnerability has been found in Tcpdump Group libpcap up to 1.10.6 and classified as problematic. This impacts an unknown function of the component BPF Interpreter. The manipulation leads to out-of-bounds. This vulnerability is listed as CVE-2026-0799. The attack must be carried out locally. There is no available exploit.

Detailsinfo

A vulnerability was found in Tcpdump Group libpcap up to 1.10.6 and classified as problematic. This issue affects an unknown part of the component BPF Interpreter. The manipulation with an unknown input leads to a out-of-bounds vulnerability. Using CWE to declare the problem leads to CWE-125. The product reads data past the end, or before the beginning, of the intended buffer. Impacted is confidentiality, integrity, and availability. The summary by CVE is:

In BPF instructions that load/store a value from/to a scratch memory register the register index is an unsigned 32-bit integer and must not exceed 15, but libpcap BPF interpreter does not validate the value. In particular uncommon use cases a crafted filter program can cause the interpreter to try reading and writing the OS process memory in the 16GiB starting at the current stack frame on 64-bit architectures and in the entire address space on 32-bit architectures.

The advisory is shared at github.com. The identification of this vulnerability is CVE-2026-0799 since 01/09/2026. The exploitation is known to be easy. An attack has to be approached locally. It demands that the victim is doing some kind of user interaction. Neither technical details nor an exploit are publicly available.

The vulnerability scanner Nessus provides a plugin with the ID 343119 (Linux Distros Unpatched Vulnerability : CVE-2026-0799), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 1.10.7 eliminates this vulnerability.

The vulnerability is also documented in the databases at Tenable (343119) and EUVD (EUVD-2026-72015). Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

Type

• Packet Analyzer Software

Vendor

• Tcpdump Group

Name

• libpcap

Version

• 1.10.0
• 1.10.1
• 1.10.2
• 1.10.3
• 1.10.4
• 1.10.5
• 1.10.6

License

• open-source

CPE 2.3info

• 🔒
• 🔒
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CPE 2.2info

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Entryinfo

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

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