SB20260928211 - Use-after-free in Linux kernel virtio driver
Published: September 28, 2026 Updated: September 30, 2026
Security Bulletin ID
SB20260928211
CSH Severity
Low
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Local access
Highest impact
Information disclosure
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 vulnerability.
1) Use-after-free (CVE-ID: CVE-2026-97996)
CWE-ID: CWE-416 - Use After Free
CVSSv4: 4.8 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N]
The vulnerability allows a local user to read freed memory.
The vulnerability exists due to use-after-free in unregister_virtio_device() when unregistering a virtio device. A local user can unbind a virtio device to read freed memory.
The issue affects virtio_mmio, virtio_vdpa, virtio_uml, mlxbf-tmfifo, and virtio_ccw transports.
Remediation
Install update from vendor's website.