What’s Vulnerable › Vulnerabilities
CVE-2026-0799: OOBR and OOBW in libpcap before 1.10.7
- Severity: high (CVSS 8.7 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: 2026-09-05 · updated 2026-09-08
- Weakness: CWE-125
Description
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.
Affected products
- The Tcpdump Group libpcap: before 1.10.7 — fixed in 1.10.7
How to fix
Upgrade to a fixed version: The Tcpdump Group libpcap 1.10.7. Check the vendor advisory for mitigations.
References
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