CVE-2026-110714: Sahlberg LIBSMB2

Medium severity, CVSS 6.5. EPSS: 0.5% chance of exploitation in the next 30 days.

libsmb2 through 6.2 contains an integer underflow vulnerability in decode_acl that allows malicious SMB servers to trigger heap out-of-bounds reads via crafted security descriptors. Attackers controlling a server or intercepting unsigned sessions can send an AclSize below 8 in a QUERY_INFO reply, bypassing ACE bounds checks and crashing the client.

Affected products

• Sahlberg LIBSMB2: up to and including 6.2

Published 2026-10-14. Last modified 2026-10-16.