CVE-2023-21400

2023-07-1300:00:00

ubuntu.com

kernel memory corruption

io_uring.c

improper locking

local privilege escalation

user interaction

unprivileged users

escalation of privilege

system execution privileges

bugzilla.redhat.com

bugzilla.suse.com

launchpad.net

6.7 Medium

CVSS3

Attack Vector

LOCAL

Attack Complexity

LOW

Privileges Required

HIGH

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

HIGH

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

0.0004 Low

EPSS

Percentile

5.1%

JSON

In multiple functions of io_uring.c, there is a possible kernel memory
corruption due to improper locking. This could lead to local escalation of
privilege in the kernel with System execution privileges needed. User
interaction is not needed for exploitation.

Bugs

Notes

Author	Note
	Priority reason: Unprivileged users may use io_uring to potentially escalate privilege.

OSVersionArchitecturePackageVersionFilename
ubuntu18.04noarchlinux< anyUNKNOWN
ubuntu20.04noarchlinux< anyUNKNOWN
ubuntu22.04noarchlinux< 5.15.0-82.91UNKNOWN
ubuntu14.04noarchlinux< anyUNKNOWN
ubuntu18.04noarchlinux-aws< anyUNKNOWN
ubuntu20.04noarchlinux-aws< anyUNKNOWN
ubuntu22.04noarchlinux-aws< 5.15.0-1043.48UNKNOWN
ubuntu23.10noarchlinux-aws< anyUNKNOWN
ubuntu24.04noarchlinux-aws< anyUNKNOWN
ubuntu14.04noarchlinux-aws< anyUNKNOWN

OS	Version	Architecture	Package	Version	Filename
ubuntu	18.04	noarch	linux	< any	UNKNOWN
ubuntu	20.04	noarch	linux	< any	UNKNOWN
ubuntu	22.04	noarch	linux	< 5.15.0-82.91	UNKNOWN
ubuntu	14.04	noarch	linux	< any	UNKNOWN
ubuntu	18.04	noarch	linux-aws	< any	UNKNOWN
ubuntu	20.04	noarch	linux-aws	< any	UNKNOWN
ubuntu	22.04	noarch	linux-aws	< 5.15.0-1043.48	UNKNOWN
ubuntu	23.10	noarch	linux-aws	< any	UNKNOWN
ubuntu	24.04	noarch	linux-aws	< any	UNKNOWN
ubuntu	14.04	noarch	linux-aws	< any	UNKNOWN