What’s Vulnerable › Vulnerabilities
CVE-2026-31912: OOBR in libpcap before 1.10.7
- Severity: medium (CVSS 5.5 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
libpcap BPF interpreter detects neither reaching the end of the filter program buffer due to lack of a return instruction nor executing a jump instruction with an offset that translates to a pointer outside of the buffer. In particular uncommon use cases a crafted filter program can cause the interpreter to try reading the OS process memory in the 32GiB around the buffer 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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