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CVE-2021-44879

Date: February 12, 2022

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.

Severity Score

5.5

Related Resources (12)

Url: https://nvd.nist.gov/vuln/detail/CVE-2021-44879

Url: https://security-tracker.debian.org/tracker/CVE-2021-44879

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

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

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

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

Url: https://lore.kernel.org/linux-f2fs-devel/20211206144421.3735-3-chao@kernel.org/T/

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

Url: https://people.canonical.com/~ubuntu-security/cve/CVE-2021-44879

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

Url: https://access.redhat.com/security/cve/CVE-2021-44879

Url: https://www.mend.io/vulnerability-database/CVE-2021-44879

Severity Score

5.5

Weakness Type (CWE)

NULL Pointer Dereference

CWE-476

CVSS v3.1

Base Score:	5.5
Attack Vector (AV):	LOCAL
Attack Complexity (AC):	LOW
Privileges Required (PR):	NONE
User Interaction (UI):	REQUIRED
Scope (S):	UNCHANGED
Confidentiality (C):	NONE
Integrity (I):	NONE
Availability (A):	HIGH

CVSS v2

Base Score:	4.3
Access Vector (AV):	NETWORK
Access Complexity (AC):	MEDIUM
Authentication (AU):	NONE
Confidentiality (C):	NONE
Integrity (I):	NONE
Availability (A):	PARTIAL
Additional information:

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