Is there a public exploit for CVE-2026-115863?

No public exploit for CVE-2026-115863 was found in Exploit-DB, Metasploit, Nuclei templates or public proof-of-concept repositories. That is an absence of evidence rather than proof that none exists.

How severe is CVE-2026-115863?

CVE-2026-115863 scores CVSS 7.6 (v3.1), rated high. EPSS puts the chance of exploitation in the next 30 days at 0.3%.

What does CVE-2026-115863 affect?

CVE-2026-115863 affects ConnMan ConnMan.

7.6 High

ConnMan through 2.0 has a stack-based buffer overflow via a DHCPv6 Reply message.

CVE-2026-115863

ConnMan through 2.0 has a stack-based buffer overflow via a DHCPv6 Reply message. This occurs in getdomains in gdhcp/client.c. It copies a fixed NSMAXDNAME (1025) bytes from a DHCPv6 DOMAINLIST (option 24) value into a 1026-byte stack buffer dnsname regardless of the actual option length, then walks DNS labels with an unbounded "c += jump + 1" loop. A crafted DHCPv6 REPLY with a DOMAINLIST 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 DOMAINLIST. The impact is unauthenticated on-link crash of connmand (runs as root). This was introduced in bb06c47.

Assessment

CVSS: 7.6 (v3.1)
Severity: High
EPSS: 0.3% chance of exploitation in the next 30 days
Known exploited: Not listed in CISA KEV
Exploit availability: Nothing found in Exploit-DB, Metasploit, Nuclei or public PoC repositories
Published: 23 October 2026
Last updated: 2 November 2026
Affected: ConnMan · ConnMan
Assigner: mitre

CVSS vectorCVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:H

At the source

EUVD (ENISA)

References

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