CVE-2021-44879

Severity Score

5.5

*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

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.

En la función gc_data_segment en el archivo fs/f2fs/gc.c en el kernel de Linux versiones anteriores a 5.16.3, no son considerados los archivos especiales, conllevando a una desreferencia de puntero NULL de move_data_page

*Credits: N/A

Attack Vector

Local

Attack Complexity

Low

Privileges Required

None

User Interaction

Required

Scope

Unchanged

Confidentiality

None

Integrity

None

Availability

High

Attack Vector

Network

Attack Complexity

Medium

Authentication

None

Confidentiality

None

Integrity

None

Availability

Partial

* Common Vulnerability Scoring System

SSVC

Decision:-

Exploitation

Automatable

Tech. Impact

* Organization's Worst-case Scenario

Timeline

2021-12-13 CVE Reserved
2022-02-13 CVE Published
2024-08-04 CVE Updated
2024-08-04 First Exploit
2024-10-29 EPSS Updated
---------- Exploited in Wild
---------- KEV Due Date

CWE

CWE-476: NULL Pointer Dereference

CAPEC

References (6)

URL	Tag	Source
https://lists.debian.org/debian-lts-announce/2024/01/msg00004.html	Mailing List
https://lists.debian.org/debian-lts-announce/2024/01/msg00005.html	Mailing List
https://lore.kernel.org/linux-f2fs-devel/20211206144421.3735-3-chao%40kernel.org/T

URL	Date	SRC
https://bugzilla.kernel.org/show_bug.cgi?id=215231	2024-08-04

URL	Date	SRC
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=9056d6489f5a41cfbb67f719d2c0ce61ead72d9f	2024-01-11

URL	Date	SRC
https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.16.3	2024-01-11

Affected Vendors, Products, and Versions

Vendor		Product				Version		Other		Status
Vendor	Product	Version	Other	Status	<-- -->	Vendor	Product	Version	Other	Status
Linux Search vendor "Linux"		Linux Kernel Search vendor "Linux" for product "Linux Kernel"				< 5.16.3 Search vendor "Linux" for product "Linux Kernel" and version " < 5.16.3"		-		Affected