SB20240531487 - NULL pointer dereference in Linux kernel selinux ss
Published: May 31, 2024 Updated: May 14, 2025
Security Bulletin ID
SB20240531487
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) NULL pointer dereference (CVE-ID: CVE-2021-47218)
The vulnerability allows a local user to perform a denial of service (DoS) attack.
The vulnerability exists due to NULL pointer dereference within the hashtab_compute_size() function in security/selinux/ss/hashtab.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/b17dd53cac769dd13031b0ca34f90cc65e523fab
- https://git.kernel.org/stable/c/83c8ab8503adf56bf68dafc7a382f4946c87da79
- https://git.kernel.org/stable/c/dc27f3c5d10c58069672215787a96b4fae01818b
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.10.82
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.15.5
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.16