CVE-2026-29004

Katalog CVE

CVSS 8.1 · High EPSS 0,62%

Kerentanan Heap-based Buffer Overflow. Skor CVSS 3.1 8.1 (High) menurut vulncheck.com.

Deskripsi (NVD)

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.

Rincian

Terbit di NVD

4 Mei 2026

Terakhir diubah

15 Juli 2026

Status NVD

Awaiting Analysis

CVSS 3.1

8.1 (High), sumber vulncheck.com
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H · uraikan di kalkulator

Jenis kelemahan (CWE)

CWE-122: Heap-based Buffer Overflow
CWE-131: Incorrect Calculation of Buffer Size

EPSS (30 hari)

0,62% peluang dieksploitasi; lebih tinggi dari 48,3% CVE lain

Produk dan versi terdampak

NVD belum mencantumkan data produk (CPE) untuk CVE ini. Produk yang terdampak biasanya disebut di deskripsi dan di advisory vendor pada daftar referensi.

Referensi dan perbaikan

• https://busybox.net/
• https://github.com/vda-linux/busybox_mirror/commit/42202bfb1e6ac51fa995beda8be4d7b654aeee2a
• https://github.com/vda-linux/busybox_mirror/commit/d368f3f7836d1c2484c8f839316e5c93e76d4409
• https://www.vulncheck.com/advisories/busybox-dhcpv6-client-heap-buffer-overflow-via-dns-servers
• https://y637f9qq2x.com/posts/busybox-dhcpv6-heap-overflow/
• https://access.redhat.com/errata/RHSA-2026:30652
• https://access.redhat.com/security/cve/CVE-2026-29004
• https://bugzilla.redhat.com/show_bug.cgi?id=2466526
• https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-29004.json