NULL pointer dereference in Linux kernel - CVE-2026-53324
Published: June 29, 2026
Vulnerability identifier: #VU135708
CSH Severity: Low
CVSS v4.0: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear
CVE-ID: CVE-2026-53324
CWE-ID: CWE-476
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vendor: Linux Foundation
Affected software:
Linux kernel
Linux kernel
Detailed vulnerability description
The vulnerability allows a local user to cause a denial of service.
The vulnerability exists due to a NULL pointer dereference in the mana debugfs directory creation logic when creating per-device debugfs directories for virtual functions. A local user can trigger device initialization in an environment where pdev->slot is NULL to cause a denial of service.
The issue can occur in environments such as generic VFIO passthrough or nested KVM.
How to mitigate CVE-2026-53324
Install security update from vendor's repository.