CVE-2021-44879

2022-02-1412:15:15

Debian Security Bug Tracker

security-tracker.debian.org

linux kernel

special files

null pointer

CVSS2

4.3

Attack Vector

NETWORK

Attack 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

CVSS3

5.5

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

EPSS

0.001

Percentile

43.5%

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.

OSVersionArchitecturePackageVersionFilename
Debian12alllinux< 5.16.7-1linux_5.16.7-1_all.deb
Debian11alllinux< 5.10.205-2linux_5.10.205-2_all.deb
Debian999alllinux< 5.16.7-1linux_5.16.7-1_all.deb
Debian13alllinux< 5.16.7-1linux_5.16.7-1_all.deb

OS	Version	Architecture	Package	Version	Filename
Debian	12	all	linux	< 5.16.7-1	linux_5.16.7-1_all.deb
Debian	11	all	linux	< 5.10.205-2	linux_5.10.205-2_all.deb
Debian	999	all	linux	< 5.16.7-1	linux_5.16.7-1_all.deb
Debian	13	all	linux	< 5.16.7-1	linux_5.16.7-1_all.deb