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CVE-2022-47939

kernel: smb2_tree_disconnect() fails to validate object existance prior to performing opertions on it

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Severity

Critical

Red Hat Product Security

10

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 5.19 before 5.19.2. fs/ksmbd/smb2pdu.c has a use-after-free and OOPS for SMB2_TREE_DISCONNECT.

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 · 10
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H

CWE-416 · Use After Free