CVE-2021-44879 Information

Description

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.

CVSS Vector

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

Reference

https://bugzilla.kernel.org/show_bug.cgi?id=215231 https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.16.3 https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=9056d6489f5a41cfbb67f719d2c0ce61ead72d9f https://lore.kernel.org/linux-f2fs-devel/20211206144421.3735-3-chao@kernel.org/T/

Attack Complexity

LOW

Privileges Required

NONE

User Interaction Required

NONE

Scope

REQUIRED

Confidentiality Impact

UNCHANGED

Integrity Impact

NONE

Availability Impact

NONE

Base Score

HIGH

Base Severity

5.5