SB2026092540 - Double free in Linux kernel fuse
Published: September 25, 2026
Security Bulletin ID
SB2026092540
CSH Severity
Low
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Physical access
Highest impact
Information disclosure
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 vulnerability.
1) Double free (CVE-ID: CVE-2026-93827)
CWE-ID: CWE-415 - Double Free
CVSSv4: 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]
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.
Remediation
Install update from vendor's website.