RHSA-2026:97486: Low: dhcp security, bug fix, and enhancement update

Published Nov 10, 2026
·
Updated

The Dynamic Host Configuration Protocol (DHCP) is a protocol that allows individual devices on an IP network to get their own network configuration information, including an IP address, a subnet mask, and a broadcast address. The dhcp packages provide a relay agent and ISC DHCP service required to enable and administer DHCP on a network.Security Fix(es): dhcp-server: dhcp-server: Persistent denial of service due to buffer overflow via OMAPI (CVE-2026-18103) Bug Fix(es) and Enhancement(s): dhcpd dies constantly with "Error allocating fallback interface: invalid argument" (JIRA:RHEL-151420) Attempt to free pointer that is inside a structure in gethwaddr2 (JIRA:RHEL-235872) 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.Additional Changes:For detailed information on changes in this release, see the Red Hat Enterprise Linux 9 Release Notes linked from the References section.

Affected Software

34 affected componentsFixes available
redhat/dhcp<4.4.2-22.b1.el9
4.4.2-22.b1.el9
redhat/dhcp-client<4.4.2-22.b1.el9
4.4.2-22.b1.el9
redhat/dhcp-client-debuginfo<4.4.2-22.b1.el9
4.4.2-22.b1.el9
redhat/dhcp-common<4.4.2-22.b1.el9
4.4.2-22.b1.el9
redhat/dhcp-debuginfo<4.4.2-22.b1.el9
4.4.2-22.b1.el9
redhat/dhcp-debugsource<4.4.2-22.b1.el9
4.4.2-22.b1.el9
redhat/dhcp-relay<4.4.2-22.b1.el9
4.4.2-22.b1.el9
redhat/dhcp-relay-debuginfo<4.4.2-22.b1.el9
4.4.2-22.b1.el9
redhat/dhcp-server<4.4.2-22.b1.el9
4.4.2-22.b1.el9
redhat/dhcp-server-debuginfo<4.4.2-22.b1.el9
4.4.2-22.b1.el9
redhat/dhcp-client<4.4.2-22.b1.el9
4.4.2-22.b1.el9
redhat/dhcp-client-debuginfo<4.4.2-22.b1.el9
4.4.2-22.b1.el9
redhat/dhcp-debuginfo<4.4.2-22.b1.el9
4.4.2-22.b1.el9
redhat/dhcp-debugsource<4.4.2-22.b1.el9
4.4.2-22.b1.el9
redhat/dhcp-relay<4.4.2-22.b1.el9
4.4.2-22.b1.el9
redhat/dhcp-relay-debuginfo<4.4.2-22.b1.el9
4.4.2-22.b1.el9
redhat/dhcp-server<4.4.2-22.b1.el9
4.4.2-22.b1.el9
redhat/dhcp-server-debuginfo<4.4.2-22.b1.el9
4.4.2-22.b1.el9
redhat/dhcp-client<4.4.2-22.b1.el9
4.4.2-22.b1.el9
redhat/dhcp-client-debuginfo<4.4.2-22.b1.el9
4.4.2-22.b1.el9
redhat/dhcp-debuginfo<4.4.2-22.b1.el9
4.4.2-22.b1.el9
redhat/dhcp-debugsource<4.4.2-22.b1.el9
4.4.2-22.b1.el9
redhat/dhcp-relay<4.4.2-22.b1.el9
4.4.2-22.b1.el9
redhat/dhcp-relay-debuginfo<4.4.2-22.b1.el9
4.4.2-22.b1.el9
redhat/dhcp-server<4.4.2-22.b1.el9
4.4.2-22.b1.el9
redhat/dhcp-server-debuginfo<4.4.2-22.b1.el9
4.4.2-22.b1.el9
redhat/dhcp-client<4.4.2-22.b1.el9.aa
4.4.2-22.b1.el9.aa
redhat/dhcp-client-debuginfo<4.4.2-22.b1.el9.aa
4.4.2-22.b1.el9.aa
redhat/dhcp-debuginfo<4.4.2-22.b1.el9.aa
4.4.2-22.b1.el9.aa
redhat/dhcp-debugsource<4.4.2-22.b1.el9.aa
4.4.2-22.b1.el9.aa
redhat/dhcp-relay<4.4.2-22.b1.el9.aa
4.4.2-22.b1.el9.aa
redhat/dhcp-relay-debuginfo<4.4.2-22.b1.el9.aa
4.4.2-22.b1.el9.aa
redhat/dhcp-server<4.4.2-22.b1.el9.aa
4.4.2-22.b1.el9.aa
redhat/dhcp-server-debuginfo<4.4.2-22.b1.el9.aa
4.4.2-22.b1.el9.aa

Remediation

Recommended actions to resolve this vulnerability, in priority order.

  1. Upgrade

    Upgrade redhat/dhcp to a version that resolves this vulnerability.

    Fixed in 4.4.2-22.b1.el9
  2. Upgrade

    Upgrade redhat/dhcp-client to a version that resolves this vulnerability.

    Fixed in 4.4.2-22.b1.el9
  3. Upgrade

    Upgrade redhat/dhcp-client-debuginfo to a version that resolves this vulnerability.

    Fixed in 4.4.2-22.b1.el9
  4. Upgrade

    Upgrade redhat/dhcp-common to a version that resolves this vulnerability.

    Fixed in 4.4.2-22.b1.el9
  5. Upgrade

    Upgrade redhat/dhcp-debuginfo to a version that resolves this vulnerability.

    Fixed in 4.4.2-22.b1.el9
  6. Upgrade

    Upgrade redhat/dhcp-debugsource to a version that resolves this vulnerability.

    Fixed in 4.4.2-22.b1.el9
  7. Upgrade

    Upgrade redhat/dhcp-relay to a version that resolves this vulnerability.

    Fixed in 4.4.2-22.b1.el9
  8. Upgrade

    Upgrade redhat/dhcp-relay-debuginfo to a version that resolves this vulnerability.

    Fixed in 4.4.2-22.b1.el9
  9. Upgrade

    Upgrade redhat/dhcp-server to a version that resolves this vulnerability.

    Fixed in 4.4.2-22.b1.el9
  10. Upgrade

    Upgrade redhat/dhcp-server-debuginfo to a version that resolves this vulnerability.

    Fixed in 4.4.2-22.b1.el9
  11. Upgrade

    Upgrade redhat/dhcp-client to a version that resolves this vulnerability.

    Fixed in 4.4.2-22.b1.el9.aa
  12. Upgrade

    Upgrade redhat/dhcp-client-debuginfo to a version that resolves this vulnerability.

    Fixed in 4.4.2-22.b1.el9.aa
  13. Upgrade

    Upgrade redhat/dhcp-debuginfo to a version that resolves this vulnerability.

    Fixed in 4.4.2-22.b1.el9.aa
  14. Upgrade

    Upgrade redhat/dhcp-debugsource to a version that resolves this vulnerability.

    Fixed in 4.4.2-22.b1.el9.aa
  15. Upgrade

    Upgrade redhat/dhcp-relay to a version that resolves this vulnerability.

    Fixed in 4.4.2-22.b1.el9.aa
  16. Upgrade

    Upgrade redhat/dhcp-relay-debuginfo to a version that resolves this vulnerability.

    Fixed in 4.4.2-22.b1.el9.aa
  17. Upgrade

    Upgrade redhat/dhcp-server to a version that resolves this vulnerability.

    Fixed in 4.4.2-22.b1.el9.aa
  18. Upgrade

    Upgrade redhat/dhcp-server-debuginfo to a version that resolves this vulnerability.

    Fixed in 4.4.2-22.b1.el9.aa

Event History

Nov 10, 2026
Advisory Published
via Red Hat·12:00 AM
Data Sourced
via Red Hat·12:00 AM
RemedyDescriptionAffected Software

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