What is CVE-2021-44879?

CVE-2021-44879 is a Medium severity Linux kernel vulnerability with a CVSS score of 5.5 out of 10, classified as a NULL Pointer Dereference flaw (CWE-476). CVE-2021-44879 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is the CVSS score for CVE-2021-44879?

CVE-2021-44879 has a CVSS score of 5.5 out of 10, rated Medium severity. The vector string is CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H.

Is there a patch available for CVE-2021-44879?

Monitor the NIST NVD and your Linux distribution's security advisories for CVE-2021-44879 patch availability.

Is CVE-2021-44879 actively exploited?

CVE-2021-44879 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is NULL Pointer Dereference (CWE-476)?

The product dereferences a pointer that it expects to be valid but is NULL, typically causing a crash. See MITRE CWE for full details: https://cwe.mitre.org/data/definitions/476.html

CVE-2021-44879

Medium

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.

Package Linux Kernel

Published 2022-02-14

Last modified 2024-11-21

CVSS version 3.1

Patch available

Awaiting data

CVSS 3.1 score

5.5

out of 10

Medium

Attack Vector

Local

Attack Complexity

Low

Privileges Required

None

User Interaction

Required

Scope

Unchanged

Confidentiality

Low

Integrity

None

Availability

High

Vector string

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

Weakness type

CWE-476

CVE-2021-44879 is a NULL Pointer Dereference vulnerability

What is NULL Pointer Dereference?

The product dereferences a pointer that it expects to be valid but is NULL, typically causing a crash. Learn more on MITRE CWE

References

6 total

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

Exploit Issue Tracking Vendor Advisory
Kernel.org
https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.16.3

Mailing List Vendor Advisory
Kernel Git
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=9056d6489f5a41cfbb67f719d2c0ce61ead72d9f

Mailing List Patch Vendor Advisory
Debian Security
https://lists.debian.org/debian-lts-announce/2024/01/msg00004.html
Debian Security
https://lists.debian.org/debian-lts-announce/2024/01/msg00005.html

Showing 5 of 6 references View all on NVD

Details

CVE ID CVE-2021-44879

Severity Medium

CVSS score 5.5 / 10

CVSS version 3.1

Published 2022-02-14

Modified 2024-11-21

KEV No

Patch Awaiting data

Package linux

Frequently asked questions

What is CVE-2021-44879?

CVE-2021-44879 is a Medium severity Linux kernel vulnerability with a CVSS score of 5.5 out of 10 , classified as a NULL Pointer Dereference flaw (CWE-476) . CVE-2021-44879 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
What is the CVSS score for CVE-2021-44879?

CVE-2021-44879 has a CVSS score of 5.5 out of 10, rated Medium severity (CVSS 3.1). The vector string is CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H.
Is there a patch available for CVE-2021-44879?

Monitor the NIST NVD and your Linux distribution's security advisories for CVE-2021-44879 patch availability.
Is CVE-2021-44879 actively exploited?

No. CVE-2021-44879 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.