Instituto Nacional de ciberseguridad. Sección Incibe
Instituto Nacional de Ciberseguridad. Sección INCIBE-CERT

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CVE-2026-31537

Severity CVSS v4.0:
Pending analysis
Type:
Unavailable / Other
Publication date:
24/04/2026
Last modified:
28/04/2026

Description

In the Linux kernel, the following vulnerability has been resolved:<br /> <br /> smb: server: make use of smbdirect_socket.send_io.bcredits<br /> <br /> It turns out that our code will corrupt the stream of<br /> reassabled data transfer messages when we trigger an<br /> immendiate (empty) send.<br /> <br /> In order to fix this we&amp;#39;ll have a single &amp;#39;batch&amp;#39; credit per<br /> connection. And code getting that credit is free to use<br /> as much messages until remaining_length reaches 0, then<br /> the batch credit it given back and the next logical send can<br /> happen.

Impact

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

Base Score: 5.50 MEDIUM
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

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

Base Score 3.x
5.50
Severity 3.x
MEDIUM

Vulnerable products and versions

CPE From Up to
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* 5.15 (including) 6.18.11 (excluding)
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* 6.19 (including) 6.19.1 (excluding)

To consult the complete list of CPE names with products and versions, see this page


References to Advisories, Solutions, and Tools