SB2025072714 - Use-after-free in Linux kernel block driver
Published: July 27, 2025
Security Bulletin ID
SB2025072714
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-2025-38443)
The vulnerability allows a local user to escalate privileges on the system.
The vulnerability exists due to a use-after-free error within the nbd_start_device() and set_bit() functions in drivers/block/nbd.c. A local user can escalate privileges on the system.
Remediation
Install update from vendor's website.
References
- https://git.kernel.org/stable/c/002aca89753f666d878ca0eb8584c372684ac4ba
- https://git.kernel.org/stable/c/8586552df591e0a367eff44af0c586213eeecc3f
- https://git.kernel.org/stable/c/91fa560c73a8126868848ed6cd70607cbf8d87e2
- https://git.kernel.org/stable/c/aa9552438ebf015fc5f9f890dbfe39f0c53cf37e
- https://git.kernel.org/stable/c/cb121c47f364b51776c4db904a6a5a90ab0a7ec5
- https://git.kernel.org/stable/c/d46186eb7bbd9a11c145120f2d77effa8d4d44c2