SB2024061317 - Improper locking in Linux kernel hardware mISDN driver
Published: June 13, 2024 Updated: May 13, 2025
Security Bulletin ID
SB2024061317
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-2021-47468)
The vulnerability allows a local user to perform a denial of service (DoS) attack.
The vulnerability exists due to improper locking within the nj_release() function in drivers/isdn/hardware/mISDN/netjet.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/6f95c97e0f9d6eb39c3f2cb45e8fa4268d1b372b
- https://git.kernel.org/stable/c/ef269a8808cb1759245a98a7fe16fceaebad894c
- https://git.kernel.org/stable/c/37e4f57b22cc5ebb3f80cf0f74fdeb487f082367
- https://git.kernel.org/stable/c/a5b34409d3fc52114c828be4adbc30744fa3258b
- https://git.kernel.org/stable/c/4054b869dc263228d30a4755800b78f0f2ba0c89
- https://git.kernel.org/stable/c/9f591cbdbed3d7822b2bdba89b34a6d7b434317d
- https://git.kernel.org/stable/c/f5966ba53013149bcf94e1536644a958dd00a026
- https://git.kernel.org/stable/c/6510e80a0b81b5d814e3aea6297ba42f5e76f73c
- https://mirrors.edge.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.14.253
- https://mirrors.edge.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.19.214
- https://mirrors.edge.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.4.290
- https://mirrors.edge.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.9.288
- 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
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.4.156