SB2024053066 - Memory leak in Linux kernel ext4
Published: May 30, 2024 Updated: May 14, 2025
Security Bulletin ID
SB2024053066
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) Memory leak (CVE-ID: CVE-2021-47342)
The vulnerability allows a local user to perform a denial of service (DoS) attack.
The vulnerability exists due to memory leak within the ext4_remount() function in fs/ext4/super.c, within the kmmpd() and brelse() functions in fs/ext4/mmp.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/b663890d854403e566169f7e90aed5cd6ff64f6b
- https://git.kernel.org/stable/c/7ed572cdf11081f8f9e07abd4bea56a3f2c4edbd
- https://git.kernel.org/stable/c/61bb4a1c417e5b95d9edb4f887f131de32e419cb
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.10.77
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.13.3
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.14