SB2024053160 - Use-after-free in Linux kernel sched
Published: May 31, 2024 Updated: May 14, 2025
Security Bulletin ID
SB2024053160
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-2021-47402)
The vulnerability allows a local user to escalate privileges on the system.
The vulnerability exists due to a use-after-free error within the fl_walk() function in net/sched/cls_flower.c. A local user can escalate privileges on the system.
Remediation
Install update from vendor's website.
References
- https://git.kernel.org/stable/c/694b0cee7f8546b69a80996a29cb3cf4149c0453
- https://git.kernel.org/stable/c/d0d520c19e7ea19ed38dc5797b12397b6ccf9f88
- https://git.kernel.org/stable/c/dab4677bdbffa5c8270e79e34e51c89efa0728a0
- https://git.kernel.org/stable/c/d5ef190693a7d76c5c192d108e8dec48307b46ee
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.10.71
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.14.10
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.15
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.4.151