Analysis and contextual insights are available on OpenCVE Cloud.
No vendor fix or workaround currently provided.
Additional remediation guidance may be available on OpenCVE Cloud.
Tracking
Sign in to view the affected projects.
| Source | ID | Title |
|---|---|---|
EUVD |
EUVD-2025-31154 | 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. |
Wed, 14 Jan 2026 15:00:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| References |
|
Fri, 26 Sep 2025 21:15:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| Weaknesses | CWE-120 | |
| Metrics |
cvssV3_1
|
Thu, 25 Sep 2025 20:15:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| 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. | |
| References |
|
Subscriptions
No data.
Status: PUBLISHED
Assigner: mitre
Published:
Updated: 2026-01-14T14:51:53.090Z
Reserved: 2025-08-17T00:00:00.000Z
Link: CVE-2025-57632
Updated: 2025-09-26T20:14:22.037Z
Status : Deferred
Published: 2025-09-25T20:15:35.237
Modified: 2026-04-15T00:35:42.020
Link: CVE-2025-57632
No data.
OpenCVE Enrichment
No data.
EUVD