CVE-2026-6554
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.
Scoring
- Severity
- MEDIUM
- CVSS base score
- 5.5
- CVSS vector
- CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
- EPSS probability
- 0.10%
- CWE
- CWE-835
- Published
- 2026-09-05
- Last modified
- 2026-09-08
Affected products
- The Tcpdump Group libpcap
Weakness type
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