CVE-2021-44879

2022-02-1400:00:00

ubuntu.com

5.5 Medium

CVSS3

Attack Vector

LOCAL

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

REQUIRED

Scope

UNCHANGED

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

HIGH

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

4.3 Medium

CVSS2

Access Vector

NETWORK

Access Complexity

MEDIUM

Authentication

NONE

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

PARTIAL

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

0.001 Low

EPSS

Percentile

35.8%

JSON

In gc_data_segment in fs/f2fs/gc.c in the Linux kernel before 5.16.3,
special files are not considered, leading to a move_data_page NULL pointer
dereference.

Bugs

<https://bugzilla.kernel.org/show_bug.cgi?id=215231>

Notes

Author	Note
cascardo	requires a corrupted filesystem

OSVersionArchitecturePackageVersionFilename
ubuntu20.04noarchlinux< 5.4.0-173.191UNKNOWN
ubuntu21.10noarchlinux< 5.13.0-40.45UNKNOWN
ubuntu20.04noarchlinux-aws< 5.4.0-1120.130UNKNOWN
ubuntu21.10noarchlinux-aws< 5.13.0-1022.24UNKNOWN
ubuntu20.04noarchlinux-aws-5.13< 5.13.0-1022.24~20.04.1UNKNOWN
ubuntu18.04noarchlinux-aws-5.4< 5.4.0-1120.130~18.04.1) Available with Ubuntu Pro or Ubuntu Pro (Infra-onlyUNKNOWN
ubuntu20.04noarchlinux-azure< 5.4.0-1126.133UNKNOWN
ubuntu21.10noarchlinux-azure< 5.13.0-1022.26UNKNOWN
ubuntu20.04noarchlinux-azure-5.13< 5.13.0-1022.26~20.04.1UNKNOWN
ubuntu18.04noarchlinux-azure-5.4< 5.4.0-1126.133~18.04.1) Available with Ubuntu Pro or Ubuntu Pro (Infra-onlyUNKNOWN

OS	Version	Architecture	Package	Version	Filename
ubuntu	20.04	noarch	linux	< 5.4.0-173.191	UNKNOWN
ubuntu	21.10	noarch	linux	< 5.13.0-40.45	UNKNOWN
ubuntu	20.04	noarch	linux-aws	< 5.4.0-1120.130	UNKNOWN
ubuntu	21.10	noarch	linux-aws	< 5.13.0-1022.24	UNKNOWN
ubuntu	20.04	noarch	linux-aws-5.13	< 5.13.0-1022.24~20.04.1	UNKNOWN
ubuntu	18.04	noarch	linux-aws-5.4	< 5.4.0-1120.130~18.04.1) Available with Ubuntu Pro or Ubuntu Pro (Infra-only	UNKNOWN
ubuntu	20.04	noarch	linux-azure	< 5.4.0-1126.133	UNKNOWN
ubuntu	21.10	noarch	linux-azure	< 5.13.0-1022.26	UNKNOWN
ubuntu	20.04	noarch	linux-azure-5.13	< 5.13.0-1022.26~20.04.1	UNKNOWN
ubuntu	18.04	noarch	linux-azure-5.4	< 5.4.0-1126.133~18.04.1) Available with Ubuntu Pro or Ubuntu Pro (Infra-only	UNKNOWN