CVE-2025-57632_CVE-2025-57632

7.5 / 10

HIGH

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

Description

libsmb2 6.2+ is vulnerable to Buffer Overflow. When processing SMB2 chained PDUs (NextCommand), libsmb2 repeatedly calls smb2_add_iovector() to append to a fixed-size iovec array without checking the upper bound of v->niov (SMB2_MAX_VECTORS=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 SMB2_OPLOCK_BREAK path bypasses message ID validation.

Basic Information

ID CVE-2025-57632

Source mitre

Published Sep 25, 2025 at 00:00

Modified Sep 26, 2025 at 20:14

Affected Product

Vendor n/a

Product n/a

Version n/a

Affected Versions n/a n/a n/a

CWE Classification

CWE-120

References

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    "published": "2025-09-25T00:00:00.000Z",
    "modified": "2025-09-26T20:14:32.816Z",
    "type": "cve",
    "title": "CVE-2025-57632",
    "source": "mitre",
    "references": "https://github.com/sahlberg/libsmb2\nhttps://github.com/sahlberg/libsmb2/blob/master/lib/compat.c#L569\nhttps://gist.github.com/ZjW1nd/0b95b63307ceee7890e88e4abc6f041e",
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