CVE
CVE-2025-57632
libsmb2 6.2+ is vulnerable to Buffer Overflow.
libsmb2 6.2+ is vulnerable to Buffer Overflow. When processing SMB2 chained PDUs (NextCommand), libsmb2 repeatedly calls smb2addiovector() to append to a fixed-size iovec array without checking the upper bound of v->niov (SMB2MAXVECTORS=256). An attacker can craft responses with many chained PDUs to overflow v->niov and perform heap out-of-bounds writes, causing memory corruption, crashes, and potentially arbitrary code execution. The SMB2OPLOCKBREAK path bypasses message ID validation.
Package Versions Affected
Package Version
patch Availability
No items found.
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CVSS Version
Severity
Base Score
CVSS Version
Score Vector
C
H
U
7.5
-
3.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
C
H
U
0
-
3.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
C
H
U
-
Related Resources
No items found.
References
https://gist.github.com/ZjW1nd/0b95b63307ceee7890e88e4abc6f041e, https://github.com/sahlberg/libsmb2/blob/master/lib/compat.c#L569, https://github.com/sahlberg/libsmb2/commit/5e75eebf922b338cdb548d60cffb3b997d2a12e8, https://github.com/sahlberg/libsmb2
Basic Information
Ecosystem
