SB20240603209 - Improper error handling in Linux kernel ext4
Published: June 3, 2024 Updated: May 14, 2025
Security Bulletin ID
SB20240603209
Severity
Low
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Local access
Highest impact
Denial of service
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 security vulnerability.
1) Improper error handling (CVE-ID: CVE-2021-47406)
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.
Remediation
Install update from vendor's website.
References
- 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