This page tracks the Ubuntu fix status. The vulnerability itself is described on the main CVE page.
View CVE-2026-110714 →
UBUNTU-CVE-2026-110714
libsmb2 through 6.2 contains an integer underflow vulnerability in decode_acl that allows malicious SMB servers to trigger heap out-of-bounds reads vi...
Original description
The description as published by the source.
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.
Source: OSV.dev (Open Source Vulnerabilities) OSV
Affected packages
Ubuntu:26.10
libsmb2
[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]
Ubuntu:26.04:LTS
libsmb2
[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]
References
- report ubuntu.com
- report cve.org
- report github.com
- report github.com
- report github.com
- report hackmd.io
- report vulncheck.com