SB2024053126 - Use-after-free in Linux kernel net fddi driver
Published: May 31, 2024 Updated: May 14, 2025
Security Bulletin ID
SB2024053126
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-2021-47306)
The vulnerability allows a local user to escalate privileges on the system.
The vulnerability exists due to a use-after-free error within the release_mem_region() function in drivers/net/fddi/defza.c. A local user can escalate privileges on the system.
Remediation
Install update from vendor's website.
References
- https://git.kernel.org/stable/c/04b06716838bfc26742dbed3ae1d3697fe5317ee
- https://git.kernel.org/stable/c/f33605908a9b6063525e9f68e62d739948c5fccf
- https://git.kernel.org/stable/c/bdfbb51f7a437ae8ea91317a5c133ec13adf3c47
- https://git.kernel.org/stable/c/deb7178eb940e2c5caca1b1db084a69b2e59b4c9
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.10.53
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.13.5
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.14
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.4.135