CVE-2026-110713 libsmb2 through 6.2 Heap Out-of-Bounds Read via File System Info Decoders
A heap out-of-bounds read in libsmb2 allows malicious SMB servers to crash clients or read memory via crafted replies.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2026-110713?
CVE-2026-110713 is a high-severity memory corruption vulnerability in sahlberg libsmb2, published on 14 Oct 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Official description
libsmb2 through 6.2 contains a heap out-of-bounds read vulnerability in smb2_decode_file_fs_volume_info and smb2_decode_file_fs_attribute_info that allows malicious SMB servers to read past reply buffers. Attackers controlling a server or intercepting unsigned sessions can send crafted QUERY_INFO replies with missing or oversized name lengths to crash the client.
Weakness: CWE-125
Which versions are affected by CVE-2026-110713?
How do I fix CVE-2026-110713?
No fix has been published for CVE-2026-110713 yet. Limit exposure of the affected software until one is available.
Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.
Is CVE-2026-110713 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-110713 exists.
Sources
Also known as DEBIAN-CVE-2026-110713, GHSA-w2j6-hg6c-f9mp, UBUNTU-CVE-2026-110713.