libpcap 1.10.7 fixes infinite-loop flaw CVE-2026-6554
A later-found, more common configuration can trigger the same loop first scored CVSS 5.5.
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Vulnerability1 · 1 read
CVE-2026-6554
- CVSS 3.1
- 7.5 high
- EPSS
- <1%p1
- Published
- ·
- Modified
Description · NVD
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.
- Weakness
- CWE-835
- Vector
- CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H