Improper error handling in Linux kernel - CVE-2021-47406
Published: June 3, 2024 / Updated: May 14, 2025
Vulnerability identifier: #VU90940
CSH Severity: Low
CVSS v4.0: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear
CVE-ID: CVE-2021-47406
CWE-ID: CWE-388
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vendor: Linux Foundation
Affected software:
Linux kernel
Linux kernel
Detailed vulnerability description
The vulnerability allows a local user to perform a denial of service (DoS) attack.
The vulnerability exists due to improper error handling within the ext4_ext_replay_shrink_inode(), skip_hole() and ext4_ext_replay_set_iblocks() functions in fs/ext4/extents.c. A local user can perform a denial of service (DoS) attack.
How to mitigate CVE-2021-47406
Install update from vendor's website.
Sources
- https://git.kernel.org/stable/c/a63474dbf692dd09b50fed592bc41f6de5f102fc
- https://git.kernel.org/stable/c/27e10c5d31ff1d222c7f797f1ee96d422859ba67
- https://git.kernel.org/stable/c/1fd95c05d8f742abfe906620780aee4dbe1a2db0
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.10.71
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.14.10
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.15