SB2024070350 - Improper privilege management in Linux kernel mm
Published: July 3, 2024 Updated: May 13, 2025
Security Bulletin ID
SB2024070350
CSH Severity
Low
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Local access
Highest impact
Data manipulation
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 vulnerability.
1) Improper privilege management (CVE-ID: CVE-2021-47491)
CWE-ID: CWE-269 - Improper Privilege Management
CVSSv4: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear
The vulnerability allows a local user to read and manipulate data.
The vulnerability exists due to improperly imposed permissions within the hugepage_vma_check() function in mm/khugepaged.c. A local user can read and manipulate data.
Remediation
Install update from vendor's website.
References
- https://git.kernel.org/stable/c/6d67b2a73b8e3a079c355bab3c1aef7d85a044b8
- https://git.kernel.org/stable/c/5fcb6fce74ffa614d964667110cf1a516c48c6d9
- https://git.kernel.org/stable/c/a4aeaa06d45e90f9b279f0b09de84bd00006e733
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.10.78
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.14.16
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.15