VDB
CVE-2026-6554
CVE-2026-6554
PUBLISHED
CVSS 5.5 MEDIUM
Reported by Tcpdump · Published September 5, 2026
libpcap BPF interpreter treats the offset in the 'ja L' BPF instruction as a signed integer to implement looping via backward jumps, but it does not limit the number of loop iterations. In particular uncommon use cases a crafted filter program can cause the interpreter to loop infinitely.
Risk Scores
CVSS 3.1
5.5
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| The Tcpdump Group | libpcap | 0 |
| alpine | libpcap | 0, 0, 0 |
| The Tcpdump Group | libpcap | |
| The Tcpdump Group | libpcap | 0, 0 |
Timeline
- Sep 5, 2026 Coalition ESS Score
- Sep 5, 2026 CVE Published
- Sep 6, 2026 EPSS Score
- Sep 8, 2026 CVE Updated