CVE-2026-31911

Public on 2026-09-05
Modified on 2026-09-08
Description
libpcap BPF interpreter calls abort() if it encounters a BPF instruction that has an invalid opcode. In particular uncommon use cases a crafted filter program can terminate the OS process.
Severity
Medium severity
Medium
See what this means
CVSS v3 Base Score
6.2
See breakdown

Affected Packages

Platform Package Release Date Advisory Status
Amazon Linux 2 - Core libpcap Pending Fix
Amazon Linux 2023 libpcap Pending Fix
Amazon Linux 2027 Preview libpcap Pending Fix

CVSS Scores

Score Type Score Vector
Amazon Linux CVSSv3 6.2 CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

References

FAQs regarding Amazon Linux ALAS/CVE Severity Red Hat: CVE-2026-31911 Mitre: CVE-2026-31911