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CVE-2021-47335

kernel: f2fs: fix to avoid racing on fsync_entry_slab by multi filesystem instances

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Severity

Moderate

Red Hat Product Security

6.3

CVSS 3.1

Review impact separately from score.

Published · May 21, 2024

Updated · September 13, 2026

Description

A flaw was found in the f2fs filesystem of the Linux kernel. A local attacker could exploit a race condition during fsync_entry_slab operations when multiple filesystem instances are involved. This could lead to a denial of service due to system instability.

CVSS score applicability

The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.

Mitigation

Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base, or stability.

CVSS / CWE

CVSS 3.1 · 6.3
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:H

CWE-416 · Use After Free