SB20260919117 - Improper resource shutdown or release in Linux kernel hv driver
Published: September 19, 2026
Security Bulletin ID
SB20260919117
CSH 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 vulnerability.
1) Improper resource shutdown or release (CVE-ID: CVE-2026-90097)
CWE-ID: CWE-404 - Improper Resource Shutdown or Release
CVSSv4: 6.7 [CVSS:4.0/AV:L/AC:L/AT:N/PR:H/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]
The vulnerability allows a local privileged user to cause a denial of service.
The vulnerability exists due to improper cleanup of uninitialized resources in the VMBus module exit function when unloading the VMBus module on a non-nested root partition. A local privileged user can unload the VMBus module to cause a denial of service.
Remediation
Install update from vendor's website.