SB20240530157 - Use-after-free in Linux kernel ethtool
Published: May 30, 2024 Updated: May 14, 2025
Security Bulletin ID
SB20240530157
Severity
Low
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Local access
Highest impact
Code execution
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 security vulnerability.
1) Use-after-free (CVE-ID: CVE-2021-47517)
The vulnerability allows a local user to escalate privileges on the system.
The vulnerability exists due to a use-after-free error within the ethnl_ops_begin() function in net/ethtool/netlink.h. A local user can escalate privileges on the system.
Remediation
Install update from vendor's website.
References
- https://git.kernel.org/stable/c/7c26da3be1e9843a15b5318f90db8a564479d2ac
- https://git.kernel.org/stable/c/cfd719f04267108f5f5bf802b9d7de69e99a99f9
- https://git.kernel.org/stable/c/dde91ccfa25fd58f64c397d91b81a4b393100ffa
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.10.87
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.15.8
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.16