Vulnerability in Red Hat Hardened Images

[ Description ]Official description

A flaw was found in BusyBox's udhcpc DHCP client. When processing raw DHCP packets, the client replaces the validated packet length with an attacker-controlled value from the IP header without re-validating the minimum size. This leads to an integer underflow when subtracting header sizes, causing a subsequent memory copy with a massively oversized length. An attacker on the same network segment can send a specially crafted packet to crash the DHCP client, resulting in denial of service and loss of network connectivity.

[ Fixes ]Fixes and patches

No fix or interim patch is linked from our sources yet. Check the vendor references below and limit exposure of affected systems until a fix is available.

[ Advisories ]Government CERT advisories

• BSI CERT-Bund13 Oct 2026WID-SEC-2026-3914

  BusyBox: Multiple vulnerabilities Translated from German

  CVE-2026-88833CVE-2026-88834CVE-2026-88838

[ References ]References

• access.redhat.com/security/cve/CVE-2026-88833
• bugzilla.redhat.com/show_bug.cgi