SB2026032594 - NULL Pointer Dereference in Linux kernel cxl driver
Published: March 25, 2026
Security Bulletin ID
SB2026032594
Severity
Low
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Local access
Highest impact
Denial of service
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 security vulnerability.
1) NULL Pointer Dereference (CVE-ID: CVE-2026-23348)
The vulnerability allows a local user to cause a denial of service.
The vulnerability exists due to a race condition in the nvdimm_bus object handling within the CXL (Compute Express Link) subsystem when creating nvdimm objects. A local user can trigger a NULL pointer dereference by exploiting the race condition during device probing, leading to a kernel crash.
The issue arises when the nvdimm_bus object is missing during device registration, causing an invalid access to a null parent pointer in __nd_device_register().
Remediation
Install update from vendor's website.