SB20260918140 - Use-after-free in Linux kernel dax driver
Published: September 18, 2026
Security Bulletin ID
SB20260918140
CSH Severity
Low
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Local access
Highest impact
Partial DoS
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 vulnerability.
1) Use-after-free (CVE-ID: CVE-2026-93075)
CWE-ID: CWE-416 - Use After Free
CVSSv4: 2 [CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N]
The vulnerability allows a local user to cause a denial of service.
The vulnerability exists due to use-after-free in FS-DAX page-map operations when handling a memory failure after a static device is unbound from FS-DAX. A local user can trigger a memory failure after FS-DAX is detached to cause a denial of service.
The condition can occur if the device is rebound to device_dax or the fsdev_dax module is unloaded.
Remediation
Install update from vendor's website.