CVE-2026-6554

EUVD-2026-72019
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.
Infinite Loop
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
NISTPrimary
5.5 MEDIUM
LOCAL
LOW
LOW
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Awaiting analysis
This vulnerability is currently awaiting analysis.
Base Score
CVSS 3.x
EPSS Score
Percentile: 1%
Debian logo
Debian Releases
Debian Product
Codename
libpcap
bookworm
postponed
forky
1.11.0-1
fixed
sid
1.11.0-1
fixed
trixie
no-dsa
Ubuntu logo
Ubuntu Releases
Ubuntu Product
Codename
libpcap
bionic
needs-triage
focal
needs-triage
jammy
needs-triage
noble
needs-triage
resolute
needs-triage
trusty
needs-triage
xenial
needs-triage
openSUSE logo
openSUSE / SLES Releases
openSUSE Product
Release
libpcap-devel
suse enterprise desktop 15 SP7
1.10.5-150700.3.13.1
fixed
suse enterprise sap 12 SP5
1.8.1-10.12.1
fixed
suse enterprise sap 15 SP4
1.10.1-150400.3.12.1
fixed
suse enterprise sap 15 SP5
1.10.1-150400.3.12.1
fixed
suse enterprise sap 15 SP6
1.10.4-150600.3.12.1
fixed
suse enterprise sap 15 SP7
1.10.5-150700.3.13.1
fixed
suse enterprise server 12 SP5
1.8.1-10.12.1
fixed
suse enterprise server 15 SP4
1.10.1-150400.3.12.1
fixed
suse enterprise server 15 SP5
1.10.1-150400.3.12.1
fixed
suse enterprise server 15 SP6
1.10.4-150600.3.12.1
fixed
suse enterprise server 15 SP7
1.10.5-150700.3.13.1
fixed
libpcap1
suse enterprise desktop 15 SP7
1.10.5-150700.3.13.1
fixed
suse enterprise sap 12 SP5
1.8.1-10.12.1
fixed
suse enterprise sap 15 SP4
1.10.1-150400.3.12.1
fixed
suse enterprise sap 15 SP5
1.10.1-150400.3.12.1
fixed
suse enterprise sap 15 SP6
1.10.4-150600.3.12.1
fixed
suse enterprise sap 15 SP7
1.10.5-150700.3.13.1
fixed
suse enterprise server 12 SP5
1.8.1-10.12.1
fixed
suse enterprise server 15 SP4
1.10.1-150400.3.12.1
fixed
suse enterprise server 15 SP5
1.10.1-150400.3.12.1
fixed
suse enterprise server 15 SP6
1.10.4-150600.3.12.1
fixed
suse enterprise server 15 SP7
1.10.5-150700.3.13.1
fixed
Amazon Linux logo
Amazon Linux Releases
Amazon Package
Release
libpcap
Amazon Linux 2
14:1.5.3-11.amzn2.0.1
fixed
Amazon Linux 2023
14:1.10.7-1.amzn2023.0.1
fixed
libpcap-debuginfo
Amazon Linux 2
14:1.5.3-11.amzn2.0.1
fixed
Amazon Linux 2023
14:1.10.7-1.amzn2023.0.1
fixed
libpcap-debugsource
Amazon Linux 2023
14:1.10.7-1.amzn2023.0.1
fixed
libpcap-devel
Amazon Linux 2
14:1.5.3-11.amzn2.0.1
fixed
Amazon Linux 2023
14:1.10.7-1.amzn2023.0.1
fixed
Azure Linux logo
Azure Linux Releases
Azure Package
Release
libpcap
Azure Linux 3.0
0:1.10.7-1.azl3
fixed
Common Weakness Enumeration
References
https://github.com/the-tcpdump-group/libpcap/commit/ff3c83475ac303c6b681c52ad0b6e14795a8e0ce