SB2024061316 - Improper locking in Linux kernel netfilter
Published: June 13, 2024 Updated: May 13, 2025
Security Bulletin ID
SB2024061316
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-2021-47451)
The vulnerability allows a local user to perform a denial of service (DoS) attack.
The vulnerability exists due to improper locking within the idletimer_tg_create() function in net/netfilter/xt_IDLETIMER.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/2a670c323055282c9b72794a491d53cef86bbeaf
- https://git.kernel.org/stable/c/cae7cab804c943d723d52724a3aeb07a3f4a2650
- https://git.kernel.org/stable/c/902c0b1887522a099aa4e1e6b4b476c2fe5dd13e
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.10.76
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.14.15
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.15