CVE-2026-6554
infinte loop in libpcap before 1.10.7
CVSS Score
5.5
EPSS Score
0.0%
EPSS Percentile
0th
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.
| CWE | CWE-835 |
| Vendor | the tcpdump group |
| Product | libpcap |
| Published | Sep 5, 2026 |
| Last Updated | Sep 8, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H Attack Vector
Local
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High
Affected Versions
The Tcpdump Group / libpcap
0 < 1.10.7
References
Credits
🔍 Kaixuan LI