SB20260918139 - Incorrect calculation in Linux kernel dax driver
Published: September 18, 2026
Security Bulletin ID
SB20260918139
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) Incorrect calculation (CVE-ID: CVE-2026-93074)
CWE-ID: CWE-682 - Incorrect Calculation
CVSSv4: 0 [CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:N/VI:N/VA:N/SC:N/SI:N/SA:N]
The vulnerability allows a local user to access an incorrect kernel virtual address.
The vulnerability exists due to incorrect address calculation in __fsdev_dax_direct_access() when handling multi-range DAX devices with physical gaps between ranges. A local user can invoke direct access for an offset that crosses a physical gap to access an incorrect kernel virtual address.
Remediation
Install update from vendor's website.