CVE-2026-6554
infinte loop in libpcap before 1.10.7
- State
- Published
- Severity
- 7.5 High
- Published
- Sep 5, 2026
- Updated
- Oct 22, 2026
- Reserved
- Apr 17, 2026
Description
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. A crafted filter program or the 'protochain' primitive used on a crafted network packet can cause the interpreter to loop infinitely.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 3.1 | 7.5 High | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H | Tcpdump |
Weaknesses
- CWE-835 Loop with Unreachable Exit Condition ('Infinite Loop')
Affected Products
| Product | Versions |
|---|---|
libpcapThe Tcpdump Group |
|
References
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