CVE-2023-31085

2023-04-2400:00:00

ubuntu.com

cve-2023-31085

linux kernel

divide-by-zero

bugzilla

user namespace

5.5 Medium

CVSS3

Attack Vector

LOCAL

Attack Complexity

LOW

Privileges Required

LOW

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

HIGH

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

0.0004 Low

EPSS

Percentile

5.1%

JSON

An issue was discovered in drivers/mtd/ubi/cdev.c in the Linux kernel 6.2.
There is a divide-by-zero error in do_div(sz,mtd->erasesize), used
indirectly by ctrl_cdev_ioctl, when mtd->erasesize is 0.

Bugs

Notes

Author	Note
	Priority reason: Requires initial user namespace CAP_SYS_RESOURCE.

OSVersionArchitecturePackageVersionFilename
ubuntu18.04noarchlinux< 4.15.0-220.231UNKNOWN
ubuntu20.04noarchlinux< 5.4.0-167.184UNKNOWN
ubuntu22.04noarchlinux< 5.15.0-89.99UNKNOWN
ubuntu23.04noarchlinux< 6.2.0-37.38UNKNOWN
ubuntu23.10noarchlinux< 6.5.0-13.13UNKNOWN
ubuntu16.04noarchlinux< 4.4.0-248.282UNKNOWN
ubuntu18.04noarchlinux-aws< 4.15.0-1163.176UNKNOWN
ubuntu20.04noarchlinux-aws< 5.4.0-1114.124UNKNOWN
ubuntu22.04noarchlinux-aws< 5.15.0-1050.55UNKNOWN
ubuntu23.04noarchlinux-aws< 6.2.0-1016.16UNKNOWN

OS	Version	Architecture	Package	Version	Filename
ubuntu	18.04	noarch	linux	< 4.15.0-220.231	UNKNOWN
ubuntu	20.04	noarch	linux	< 5.4.0-167.184	UNKNOWN
ubuntu	22.04	noarch	linux	< 5.15.0-89.99	UNKNOWN
ubuntu	23.04	noarch	linux	< 6.2.0-37.38	UNKNOWN
ubuntu	23.10	noarch	linux	< 6.5.0-13.13	UNKNOWN
ubuntu	16.04	noarch	linux	< 4.4.0-248.282	UNKNOWN
ubuntu	18.04	noarch	linux-aws	< 4.15.0-1163.176	UNKNOWN
ubuntu	20.04	noarch	linux-aws	< 5.4.0-1114.124	UNKNOWN
ubuntu	22.04	noarch	linux-aws	< 5.15.0-1050.55	UNKNOWN
ubuntu	23.04	noarch	linux-aws	< 6.2.0-1016.16	UNKNOWN