Incorrect Calculation of Buffer Size Affecting busybox package, versions <0:1.37.0-7.3.hum1


Severity

Recommended
0.0
high
0
10

Based on Red Hat Enterprise Linux security rating.

Threat Intelligence

EPSS
0.38% (30th percentile)

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  • Snyk IDSNYK-RHEL10-BUSYBOX-17039221
  • published29 May 2026
  • disclosed4 May 2026

Introduced: 4 May 2026

CVE-2026-29004  (opens in a new tab)
CWE-131  (opens in a new tab)

How to fix?

Upgrade RHEL:10 busybox to version 0:1.37.0-7.3.hum1 or higher.
This issue was patched in RHSA-2026:30652.

NVD Description

Note: Versions mentioned in the description apply only to the upstream busybox package and not the busybox package as distributed by RHEL. See How to fix? for RHEL:10 relevant fixed versions and status.

BusyBox before commit 42202bf contains a heap buffer overflow vulnerability in the DHCPv6 client (udhcpc6) DNS_SERVERS option handler in networking/udhcp/d6_dhcpc.c that allows network-adjacent attackers to trigger memory corruption by sending a crafted DHCPv6 response with a malformed D6_OPT_DNS_SERVERS option. Attackers can exploit incorrect heap buffer allocation calculations in the option_to_env() function to cause denial of service or achieve arbitrary code execution on embedded systems without heap hardening.

CVSS Base Scores

version 3.1