CVE-2026-110713
libsmb2 through 6.2 Heap Out-of-Bounds Read via File System Info Decoders
- State
- Published
- Severity
- 7.1 High
- Published
- Oct 14, 2026
- Updated
- Oct 14, 2026
- Reserved
- Oct 14, 2026
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.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 4.0 | 7.1 High | CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N | VulnCheck |
| 3.1 | 6.5 Medium | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H | VulnCheck |
Weaknesses
- CWE-125 Out-of-bounds Read
Affected Products
| Product | Versions |
|---|---|
libsmb2sahlberg |
|
References
- https://hackmd.io/@haind-pwn/libsmb2-query-info-reply-oob-readtechnical-descriptionexploit
- https://github.com/sahlberg/libsmb2/blob/d67e213a5c4e7e4969fd81f0b95e4ca5831fbba1/lib/smb2-data-filesystem-info.c#L71technical-description
- https://github.com/sahlberg/libsmb2/commit/dd0bbdee24bb56f7ec95431afc07ce0a666533f7patch
- https://github.com/sahlberg/libsmb2product
- VulnCheck Advisory: libsmb2 through 6.2 Heap Out-of-Bounds Read via File System Info Decodersthird-party-advisory
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