CVE-2026-115863
CVE-2026-115863
This page contains facts from public vulnerability sources. Check the original advisory before updating.
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.
CVSS 7.6 · High · EPSS 0.3%
- Published
- Updated
Stack: system
Affected products and versions
connman
- Versions
- ≥ 0, ≤ 2.0: Affected (custom)
No fix published
connman Debian:12
- Versions
- 1.41-3
- 1.42-1
- 1.42-2
- 1.42-3
- 1.42-4
- 1.42-5
- 1.43-1
- 1.44-1
- 1.44-2
- 1.44-3
- 1.45-1
- 1.45-2
- 1.45-3
- 2.0-1
- 2.0-2
- Affected ranges
- ECOSYSTEM: (−∞, +∞)
No fix published
connman Debian:13
- Versions
- 1.44-3
- 1.45-1
- 1.45-2
- 1.45-3
- 2.0-1
- 2.0-2
- Affected ranges
- ECOSYSTEM: (−∞, +∞)
No fix published
connman Debian:14
- Versions
- 1.44-3
- 1.45-1
- 1.45-2
- 1.45-3
- 2.0-1
- 2.0-2
- Affected ranges
- ECOSYSTEM: (−∞, +∞)
No fix published