CVE-2022-0168

2022-03-2500:00:00

ubuntu.com

linux kernel

smb2_ioctl_query_info

denial of service

cifs

privilege escalation

memdup_user

system crash

CVSS3

4.4

Attack Vector

LOCAL

Attack Complexity

LOW

Privileges Required

HIGH

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

HIGH

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

EPSS

Percentile

12.6%

JSON

A denial of service (DOS) issue was found in the Linux kernel’s
smb2_ioctl_query_info function in the fs/cifs/smb2ops.c Common Internet
File System (CIFS) due to an incorrect return from the memdup_user
function. This flaw allows a local, privileged (CAP_SYS_ADMIN) attacker to
crash the system.

Bugs

Notes

Author	Note
sbeattie	reproducers in git commits

OSVersionArchitecturePackageVersionFilename
ubuntu20.04noarchlinux< 5.4.0-156.173UNKNOWN
ubuntu22.04noarchlinux< 5.15.0-35.36UNKNOWN
ubuntu20.04noarchlinux-aws< 5.4.0-1107.115UNKNOWN
ubuntu22.04noarchlinux-aws< 5.15.0-1009.11UNKNOWN
ubuntu18.04noarchlinux-aws-5.4< 5.4.0-1107.115~18.04.1UNKNOWN
ubuntu20.04noarchlinux-azure< anyUNKNOWN
ubuntu22.04noarchlinux-azure< 5.15.0-1008.9UNKNOWN
ubuntu20.04noarchlinux-azure-5.15< 5.15.0-1008.9~20.04.1UNKNOWN
ubuntu18.04noarchlinux-azure-5.4< 5.4.0-1113.119~18.04.1UNKNOWN
ubuntu20.04noarchlinux-bluefield< 5.4.0-1068.74UNKNOWN

OS	Version	Architecture	Package	Version	Filename
ubuntu	20.04	noarch	linux	< 5.4.0-156.173	UNKNOWN
ubuntu	22.04	noarch	linux	< 5.15.0-35.36	UNKNOWN
ubuntu	20.04	noarch	linux-aws	< 5.4.0-1107.115	UNKNOWN
ubuntu	22.04	noarch	linux-aws	< 5.15.0-1009.11	UNKNOWN
ubuntu	18.04	noarch	linux-aws-5.4	< 5.4.0-1107.115~18.04.1	UNKNOWN
ubuntu	20.04	noarch	linux-azure	< any	UNKNOWN
ubuntu	22.04	noarch	linux-azure	< 5.15.0-1008.9	UNKNOWN
ubuntu	20.04	noarch	linux-azure-5.15	< 5.15.0-1008.9~20.04.1	UNKNOWN
ubuntu	18.04	noarch	linux-azure-5.4	< 5.4.0-1113.119~18.04.1	UNKNOWN
ubuntu	20.04	noarch	linux-bluefield	< 5.4.0-1068.74	UNKNOWN