CVE-2026-46079

A flaw was found in the Linux kernel's Rados Block Device (rbd) module. When adding a new block device, a double teardown of resources can occur if the disk addition process fails. This can lead to a null-pointer dereference during cleanup operations, allowing a local attacker to cause a system crash, resulting in a Denial of Service (DoS).

A Moderate flaw exists in the Linux kernel's Rados Block Device (rbd) module. This vulnerability stems from a double teardown of resources during the failure of a new block device addition, which can result in a null-pointer dereference. A local attacker could leverage this to trigger a system crash, leading to a Denial of Service on Red Hat Enterprise Linux 9 and Red Hat In-Vehicle OS 2 systems where the rbd module is in use.

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.

If the Rados Block Device (rbd) module is not required, it can be prevented from loading to mitigate this issue.

To blacklist the rbd module, create a configuration file: echo "blacklist rbd" | sudo tee /etc/modprobe.d/disable-rbd.conf

Then, regenerate the initramfs and reboot the system for the change to take effect: sudo dracut -f -v (for systems using dracut) sudo reboot

This action will disable functionality dependent on the rbd module, such as Ceph Rados Block Devices.