SB20250916212 - Improper locking in Linux kernel block driver
Published: September 16, 2025 Updated: September 22, 2025
Security Bulletin ID
SB20250916212
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-2022-50314)
The vulnerability allows a local user to perform a denial of service (DoS) attack.
The vulnerability exists due to improper locking within the nbd_start_device_ioctl() function in drivers/block/nbd.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/1de7c3cf48fc41cd95adb12bd1ea9033a917798a
- https://git.kernel.org/stable/c/3575949513ea3b387b30dac1e69468a923c86caf
- https://git.kernel.org/stable/c/35fb7d4a53d9e36d1b91161ea9870d9c6d57dccf
- https://git.kernel.org/stable/c/3ba3846cb3e2fb3c6fbf79e998472821b298419e
- https://git.kernel.org/stable/c/62006a72b05e0d38727eef5188700f2488be5e89
- https://git.kernel.org/stable/c/b2700f98b3f4dd19fb4315b70581e5caff89eb49
- https://git.kernel.org/stable/c/c0d73be0af8c1310713bc39a8d7a22e35084e14f
- https://git.kernel.org/stable/c/c7b4641bd2395c2f3cd3b0a0cbf292ed9d489398
- https://mirrors.edge.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.19.262