SB2024060399 - Improper locking in Linux kernel bpf
Published: June 3, 2024 Updated: May 14, 2025
Security Bulletin ID
SB2024060399
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) Improper locking (CVE-ID: CVE-2021-47128)
The vulnerability allows a local user to perform a denial of service (DoS) attack.
The vulnerability exists due to improper locking within the bpf_probe_read_kernel_common(), bpf_probe_read_kernel_str_common() and bpf_tracing_func_proto() functions in kernel/trace/bpf_trace.c, within the bpf_base_func_proto() function in kernel/bpf/helpers.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/ff5039ec75c83d2ed5b781dc7733420ee8c985fc
- https://git.kernel.org/stable/c/acc43fc6cf0d50612193813c5906a1ab9d433e1e
- https://git.kernel.org/stable/c/ff40e51043af63715ab413995ff46996ecf9583f
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.10.43
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.12.10
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.13