RHSA-2026:99164: Important: libpcap security update
The libpcap packages provide a portable framework for low-level network monitoring. The libpcap library provides network statistics collection, security monitoring, and network debugging.Security Fix(es): libpcap: libpcap: Denial of Service via infinite loop in BPF interpreter (CVE-2026-6554) For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.
Affected Software
Remediation
Recommended actions to resolve this vulnerability, in priority order.
- Upgrade
Upgrade
redhat/libpcapto a version that resolves this vulnerability.Fixed in 1.10.0-4.el9_8.2 - Upgrade
Upgrade
redhat/libpcap-debuginfoto a version that resolves this vulnerability.Fixed in 1.10.0-4.el9_8.2 - Upgrade
Upgrade
redhat/libpcap-debugsourceto a version that resolves this vulnerability.Fixed in 1.10.0-4.el9_8.2 - Upgrade
Upgrade
redhat/libpcapto a version that resolves this vulnerability.Fixed in 1.10.0-4.el9_8.2.aa - Upgrade
Upgrade
redhat/libpcap-debuginfoto a version that resolves this vulnerability.Fixed in 1.10.0-4.el9_8.2.aa - Upgrade
Upgrade
redhat/libpcap-debugsourceto a version that resolves this vulnerability.Fixed in 1.10.0-4.el9_8.2.aa - Upgrade
Upgrade
redhat/libpcap-develto a version that resolves this vulnerability.Fixed in 1.10.0-4.el9_8.2 - Upgrade
Upgrade
redhat/libpcap-develto a version that resolves this vulnerability.Fixed in 1.10.0-4.el9_8.2.aa
Event History
Frequently Asked Questions
What impact does this issue have on affected systems?
The issue can cause a denial of service through an infinite loop in the libpcap BPF interpreter. This could prevent affected software using the library from completing packet-filter processing.
Which Red Hat packages are included in this update?
The advisory lists redhat/libpcap, redhat/libpcap-debuginfo, redhat/libpcap-debugsource, and redhat/libpcap-devel.