SB20260928220 - Improper resource shutdown or release in Linux kernel virtio driver

Description

This security bulletin contains information about 1 vulnerability.

1) Improper resource shutdown or release (CVE-ID: CVE-2026-97987)

CWE-ID: CWE-404 - Improper Resource Shutdown or Release

CVSSv4: 2 [CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:N/VI:L/VA:L/SC:N/SI:N/SA:N]

The vulnerability allows a local user to cause DMA access to torn-down virtqueues.

The vulnerability exists due to improper resource shutdown in the virtio_input probe error path when handling a failed input device registration. A local user can trigger the failed registration path to cause DMA access to torn-down virtqueues.

The device is marked DRIVER_OK before input device registration is attempted.

Remediation

Install update from vendor's website.

References

• https://git.kernel.org/stable/c/668ebfea7ba623450b12fdeaa0d080464d0c0a14
• https://git.kernel.org/stable/c/81489b32a21c9360f8750d1fb600155d27452e19
• https://git.kernel.org/stable/c/8407da8974326c1ffdfe6a5a9bfc8fed3212bbdf
• https://git.kernel.org/stable/c/9a7e107734137f098f9b81e5615aa5a02c5395c7