CVE-2026-115863
Gravedad CVSS v3.1:
ALTA
Tipo:
CWE-121
Desbordamiendo de búfer basado en pila (Stack)
Fecha de publicación:
23/10/2026
Última modificación:
23/10/2026
Descripción
*** Pendiente de traducción *** ConnMan through 2.0 has a stack-based buffer overflow via a DHCPv6 Reply message. This occurs in get_domains in gdhcp/client.c. It copies a fixed NS_MAXDNAME (1025) bytes from a DHCPv6 DOMAIN_LIST (option 24) value into a 1026-byte stack buffer dns_name regardless of the actual option length, then walks DNS labels with an unbounded "c += jump + 1" loop. A crafted DHCPv6 REPLY with a DOMAIN_LIST option of >= 1025 non-zero bytes makes the label walk leave the buffer and read/write '.' past its end in attacker-chosen strides. An on-link attacker can trigger this without authentication via a forged Router Advertisement (O=1) and a forged DHCPv6 REPLY matching xid/CLIENTID with a long DOMAIN_LIST. The impact is unauthenticated on-link crash of connmand (runs as root). This was introduced in bb06c47.
Impacto
Puntuación base 3.x
7.60
Gravedad 3.x
ALTA