Double free in Linux kernel - CVE-2026-93827
Published: September 25, 2026
Vulnerability identifier: #VU152064
CSH Severity: Low
CVSS v4: 0 [CVSS:4.0/AV:P/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:N/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-93827
CWE-ID: CWE-415
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows an attacker with physical access to trigger a double-free.
The vulnerability exists due to a double free in the virtio-fs queue setup and probe cleanup paths when probing a virtio-fs device that advertises more request queues than the transport provides. An attacker with physical access can present a malformed virtio-fs device to cause virtio_find_vqs() to fail during extra queue setup and trigger a double-free.
Affected software
Linux kernel
How to mitigate CVE-2026-93827
Install security update from vendor's repository.
Linux kernel - update to 7.0 rc3