CVE-2026-88833
Published: October 20, 2026Last modified: October 21, 2026
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.
Severity score breakdown
| Parameter | Value |
|---|---|
| Base score | 6.5 |
| Attack Vector | ADJACENT_NETWORK |
| Attack complexity | LOW |
| Privileges required | NONE |
| User interaction | NONE |
| Scope | UNCHANGED |
| Confidentiality | NONE |
| Integrity impact | NONE |
| Availability impact | HIGH |
| Vector | CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
Status
| Product | Release | Package | Status |
|---|---|---|---|
| Alpaquita Linux | 23 LTS | busybox | Unknown (1.35.0-r29) |
| 25 LTS | busybox | Unknown (1.37.0-r20) | |
| Stream | busybox | Unknown (1.36.1-r1) | |
| Hardened Containers | 23 LTS | busybox | Unknown (1.35.0-r29) |
| 25 LTS | busybox | Unknown (1.37.0-r20) | |
| Stream | busybox | Unknown (1.36.1-r1) |