CVE-2026-110713

MEDIUM 6.5

libsmb2 through 6.2 Heap Out-of-Bounds Read via File System Info Decoders

CVSS Score

6.5

EPSS Score

0.0%

EPSS Percentile

0th

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.

CWE	CWE-125
Vendor	sahlberg
Product	libsmb2
Published	Oct 14, 2026

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CVSS v3 Breakdown

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

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

Required

Scope

Unchanged

Confidentiality

None

Integrity

None

Availability

High

Affected Versions

sahlberg / libsmb2

0 ≤ 6.2

References

NVD ↗ CVE.org ↗ EPSS Data ↗

hackmd.io: https://hackmd.io/@haind-pwn/libsmb2-query-info-reply-oob-read github.com: https://github.com/sahlberg/libsmb2/blob/d67e213a5c4e7e4969fd81f0b95e4ca5831fbba1/lib/smb2-data-filesystem-info.c#L71 github.com: https://github.com/sahlberg/libsmb2/commit/dd0bbdee24bb56f7ec95431afc07ce0a666533f7 github.com: https://github.com/sahlberg/libsmb2 vulncheck.com: https://www.vulncheck.com/advisories/libsmb2-through-6.2-heap-out-of-bounds-read-via-file-system-info-decoders

Credits

Benjamin Ali HaiND from the Post and Telecommunication Institute of Technology