CVE-2026-110712 libsmb2 through 6.2 Heap Out-of-Bounds Read via smb2_decode_file_all_info
A heap out-of-bounds read in libsmb2 allows malicious SMB servers to crash clients via crafted file information 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-2026-110712?
CVE-2026-110712 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_all_info that allows malicious SMB servers to crash clients by sending an unchecked FileNameLength. Attackers controlling the server or performing man-in-the-middle on unsigned sessions can return crafted FileAllInformation replies to smb2_stat or smb2_fstat calls, crashing the client.
Weakness: CWE-125
Which versions are affected by CVE-2026-110712?
How do I fix CVE-2026-110712?
No fix has been published for CVE-2026-110712 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-2026-110712 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-110712 exists.
Sources
Also known as DEBIAN-CVE-2026-110712, GHSA-r4h5-4wv2-c8cj, UBUNTU-CVE-2026-110712.