CVE-2020-29368

2020-11-2800:00:00

ubuntu.com

7 High

CVSS3

Attack Vector

LOCAL

Attack Complexity

HIGH

Privileges Required

LOW

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

HIGH

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

6.9 Medium

CVSS2

Access Vector

LOCAL

Access Complexity

MEDIUM

Authentication

NONE

Confidentiality Impact

COMPLETE

Integrity Impact

COMPLETE

Availability Impact

COMPLETE

AV:L/AC:M/Au:N/C:C/I:C/A:C

0.001 Low

EPSS

Percentile

33.4%

JSON

An issue was discovered in __split_huge_pmd in mm/huge_memory.c in the
Linux kernel before 5.7.5. The copy-on-write implementation can grant
unintended write access because of a race condition in a THP mapcount
check, aka CID-c444eb564fb1.

OSVersionArchitecturePackageVersionFilename
ubuntu18.04noarchlinux< 4.15.0-115.116UNKNOWN
ubuntu20.04noarchlinux< 5.4.0-45.49UNKNOWN
ubuntu18.04noarchlinux-aws< 4.15.0-1080.84UNKNOWN
ubuntu20.04noarchlinux-aws< 5.4.0-1022.22UNKNOWN
ubuntu18.04noarchlinux-aws-5.4< 5.4.0-1022.22~18.04.1UNKNOWN
ubuntu16.04noarchlinux-aws-hwe< 4.15.0-1080.84~16.04.1UNKNOWN
ubuntu20.04noarchlinux-azure< 5.4.0-1023.23UNKNOWN
ubuntu16.04noarchlinux-azure< 4.15.0-1093.103~16.04.1UNKNOWN
ubuntu18.04noarchlinux-azure-4.15< 4.15.0-1093.103UNKNOWN
ubuntu18.04noarchlinux-azure-5.4< 5.4.0-1023.23~18.04.1UNKNOWN

OS	Version	Architecture	Package	Version	Filename
ubuntu	18.04	noarch	linux	< 4.15.0-115.116	UNKNOWN
ubuntu	20.04	noarch	linux	< 5.4.0-45.49	UNKNOWN
ubuntu	18.04	noarch	linux-aws	< 4.15.0-1080.84	UNKNOWN
ubuntu	20.04	noarch	linux-aws	< 5.4.0-1022.22	UNKNOWN
ubuntu	18.04	noarch	linux-aws-5.4	< 5.4.0-1022.22~18.04.1	UNKNOWN
ubuntu	16.04	noarch	linux-aws-hwe	< 4.15.0-1080.84~16.04.1	UNKNOWN
ubuntu	20.04	noarch	linux-azure	< 5.4.0-1023.23	UNKNOWN
ubuntu	16.04	noarch	linux-azure	< 4.15.0-1093.103~16.04.1	UNKNOWN
ubuntu	18.04	noarch	linux-azure-4.15	< 4.15.0-1093.103	UNKNOWN
ubuntu	18.04	noarch	linux-azure-5.4	< 5.4.0-1023.23~18.04.1	UNKNOWN