Instituto Nacional de ciberseguridad. Sección Incibe
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CVE-2026-46185

Severity CVSS v4.0:
Pending analysis
Type:
Unavailable / Other
Publication date:
28/05/2026
Last modified:
30/05/2026

Description

In the Linux kernel, the following vulnerability has been resolved:<br /> <br /> smb/client: fix out-of-bounds read in symlink_data()<br /> <br /> Since smb2_check_message() returns success without length validation for<br /> the symlink error response, in symlink_data() it is possible for<br /> iov-&gt;iov_len to be smaller than sizeof(struct smb2_err_rsp). If the buffer<br /> only contains the base SMB2 header (64 bytes), accessing<br /> err-&gt;ErrorContextCount (at offset 66) or err-&gt;ByteCount later in<br /> symlink_data() will cause an out-of-bounds read.

Impact

Vector 3.x
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H CVSS v3.1 Severity and Metrics:

Base Score: 9.10 CRITICAL
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H

Attack Vector (AV): Network
Attack Complexity (AC): Low
Privileges Required (PR): None
User Interaction (UI): None
Scope (S): Unchanged
Confidentiality (C): High
Integrity (I): None
Availability (A): High

Base Score 3.x
9.10
Severity 3.x
CRITICAL

References to Advisories, Solutions, and Tools