CVE-2022-47940

kernel: smb2_write() fails to validate user supplied data which can result in out-of-bounds read

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Severity

Critical

Red Hat Product Security

8.1

CVSS 3.1

Review impact separately from score.

Published · December 22, 2022

Updated · November 21, 2025

Description

An issue was discovered in ksmbd in the Linux kernel 5.15 through 5.18 before 5.18.18. fs/ksmbd/smb2pdu.c lacks length validation in the non-padding case in smb2_write.

Statement

There was no shipped kernel version that was seen affected by this problem. These files are not built in our source code. See https://access.redhat.com/solutions/6991749 for more information.

CVSS score applicability

The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.

Mitigation

No mitigation is specified in collected source.

CVSS / CWE

CVSS 3.1 · 8.1
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H

CWE-125 · Out-of-bounds Read