CVE-2021-44879

MEDIUM

Linux Kernel < 5.16.3 - NULL Pointer Dereference in F2FS gc_data_segment

Title source: llm

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.

References (6)

Core 6

Core References

Mailing List

https://lore.kernel.org/linux-f2fs-devel/20211206144421.3735-3-chao%40kernel.org/T/

Mailing List mailing-list

https://lists.debian.org/debian-lts-announce/2024/01/msg00004.html

Mailing List mailing-list

https://lists.debian.org/debian-lts-announce/2024/01/msg00005.html

Exploit, Issue Tracking, Vendor Advisory

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

Mailing List, Vendor Advisory

https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.16.3

Mailing List, Patch, Vendor Advisory

https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=9056d6489f5a41cfbb67f719d2c0ce61ead72d9f

Scores

CVSS v3 5.5

EPSS 0.0123

EPSS Percentile 65.3%

Attack Vector LOCAL

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

Details

CWE

CWE-476

Status published

Products (1)

linux/linux_kernel < 5.16.3

Published Feb 14, 2022

Tracked Since Feb 18, 2026