High
infinte loop in libpcap before 1.10.7
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.
Announced Source revision 1
Original source ↗CVE-2026-6554
Primary source · Revision 1
Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.
Security context
Source reference: cve:CVE-2026-6554
libpcap
Source reference: /containers/cna/affected/0/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Structured affected-version data
Original package identities and version rules from this source.
[
{
"repo": "https://github.com/the-tcpdump-group/libpcap/",
"vendor": "The Tcpdump Group",
"modules": [
"BPF interpreter"
],
"product": "libpcap",
"versions": [
{
"status": "affected",
"version": "0",
"lessThan": "1.10.7",
"versionType": "semver"
}
],
"programFiles": [
"bpf_filter.c"
],
"defaultStatus": "unaffected",
"programRoutines": [
{
"name": "pcapint_filter_with_aux_data()"
}
]
}
]- Related CVEs
- CVE-2026-6554
Source reference:
/cveMetadata/cveId
Publisher severity
high
Source reference: /containers/cna/metrics
- Event
- #52381 · Revision 1
- Added to Heist Feed
- Publisher date