CVE-2026-63810
kernel: block: Avoid mounting the bdev pseudo-filesystem in userspace
Severity
LowRed Hat Product Security
CVSS 3.1
Review impact separately from score.
Published · July 19, 2026
Updated · July 21, 2026
Description
A flaw was found in the Linux kernel. This vulnerability allows a local user to cause a system crash, leading to a Denial of Service (DoS), by attempting to mount the internal bdev pseudo-filesystem. This action triggers a null pointer dereference within the kernel, which could also potentially be used to gain elevated privileges.
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