CVE-2025-68368
kernel: Kernel: Denial of Service in md driver via uninitialized bioset
Severity
ModerateRed Hat Product Security
CVSS 3.1
Review impact separately from score.
Published · December 24, 2025
Updated · October 29, 2026
Description
A flaw was found in the Linux kernel's Multiple Device (md) driver. A local user can exploit this vulnerability by performing specific operations on mdadm (Multiple Device Administration) and sysfs (a virtual filesystem providing an interface to kernel data structures). This can lead to a NULL pointer dereference because the bioset is not properly initialized before I/O operations, resulting in a system crash and a Denial of Service (DoS).
CVSS score applicability
The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.
Mitigation
No mitigation is specified in collected source.
CVSS / CWE
CVSS 3.1 · 5.5CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
CWE-476 · NULL Pointer Dereference