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This update for busybox fixes the following issue

- CVE-2026-29004: a crafted DHCPv6 response can lead to a heap buffer overflow in the DHCPv6 client (bsc#1263989).

CVE-2026-29004 is a heap buffer overflow vulnerability in the BusyBox DHCPv6 client, specifically in the option_to_env() function handling the D6_OPT_DNS_SERVERS option. An attacker on the adjacent network can exploit this by sending a crafted DHCPv6 response with a malformed DNS servers option, leading to memory corruption. This may allow arbitrary code execution or denial of service on affected embedded systems without heap hardening. Red Hat's advisory (RHSA-2026:30652) includes updated BusyBox RPMs (version 1.37.0-7.3.hum1) for Red Hat Hardened Images to fix this vulnerability. The advisory recommends restricting DHCPv6 client network access to trusted servers or disabling the DHCPv6 client if not required. The CVSS v3.1 base score is 8.8 (high severity) as per Red Hat's assessment. No known exploits in the wild have been reported at this time.

Detailed information about Red Hat Security Advisory: Red Hat Hardened Images RPMs Security Update affecting Red Hat Product Security Red Hat. Get real-time upd

CWE-122: Heap-based Buffer Overflow in vda-linux busybox_mirror (CVE-2026-29004) - Live Threat Intelligence - Threat Radar | OffSeq.com

https://access.redhat.com/errata/RHSA-2026:30652

https://access.redhat.com/security/cve/CVE-2026-29004

https://access.redhat.com/security/updates/classification/

https://images.redhat.com/

Canonical URL

SUSE ratings

URL of this CSAF notice

SUSE Bug 1263989

SUSE CVE CVE-2026-29004 page

Security update for busybox

busybox_mirror

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.

CVE-2026-29004 is a heap buffer overflow vulnerability in the DHCPv6 client (udhcpc6) of BusyBox prior to commit 42202bf. The flaw arises from incorrect heap buffer allocation calculations in the option_to_env() function when processing the D6_OPT_DNS_SERVERS option in DHCPv6 responses. Network-adjacent attackers can exploit this by sending a crafted DHCPv6 response with a malformed DNS_SERVERS option, potentially causing memory corruption. This can result in denial of service or arbitrary code execution on embedded systems without heap hardening. Red Hat has issued a security advisory and released updated BusyBox RPMs (version 1.37.0-7.3.hum1) for their Hardened Images to mitigate this vulnerability.

Detailed information about CVE-2026-29004: CWE-122: Heap-based Buffer Overflow in vda-linux busybox_mirror affecting vda-linux busybox_mirror. Get real-time upd

CVE-2026-29004: CWE-122: Heap-based Buffer Overflow in vda-linux busybox_mirror - Live Threat Intelligence - Threat Radar | OffSeq.com

CVE-2026-29004: CWE-122: Heap-based Buffer Overflow in vda-linux busybox_mirror


Security update for busyboxCVE-2026-29004 0 This update for busybox fixes the following issue - CVE-2026-29004: a crafted DHCPv6 response can lead to a heap buffer overflow in the DHCPv6 client (bsc#1263989). HighVulnerability#gcve #csaf #cve-2026-29004 Join the discussion	GCVE Database	06/02/2026, 13:49:06 UTC Added: 06/28/2026, 22:13:58 UTC
CVE-2026-29004: CWE-122: Heap-based Buffer Overflow in vda-linux busybox_mirrorCVE-2026-29004 0 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. HighVulnerability#cve #cve-2026-29004 #cwe-122 Join the discussion	CVE Database V5	05/04/2026, 18:05:18 UTC Added: 05/04/2026, 18:22:24 UTC

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