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.
CVSS v3 Base Score
See breakdown
Affected Packages
| Platform | Package | Release Date | Advisory | Status |
|---|---|---|---|---|
| Amazon Linux 2 - Core | libpcap | 2026-09-28 | ALAS2-2026-3927 | Fixed |
| Amazon Linux 2023 | libpcap | 2026-09-29 | ALAS2023-2026-3100 | Fixed |
| Amazon Linux 2027 Preview | libpcap | 2026-09-18 | ALAS2027-2026-007 | Fixed |
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 |