SB20260928202 - Improper input validation in Linux kernel vdpa vdpa_user driver
Published: September 28, 2026 Updated: September 30, 2026
Security Bulletin ID
SB20260928202
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 input validation (CVE-ID: CVE-2026-97989)
CWE-ID: CWE-20 - Improper input validation
CVSSv4: 6.8 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]
The vulnerability allows a local user to cause a denial of service.
The vulnerability exists due to improper input validation in vduse_validate_config() when opening a virtio-net device created with a zero virtqueue alignment value. A local user can create and open a virtio-net device with an invalid virtqueue alignment value to cause a denial of service.
Remediation
Install update from vendor's website.