ALBA-2019:2715 virt:rhel bug fix update
A bug in QEMU-KVM causes a core dump when hotplugging deleted disks with iothread parameters, leading to denial of service for virtual machines.
- Exploited in the wild
- Not known
- Login needed
- An administrator
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- Available
What is ALBA-2019:2715?
ALBA-2019:2715 is a denial of service vulnerability in sgabios, published on 10 Sep 2019. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
Bug Fix(es):
qemu-kvm core dumped after hotplug the deleted disk with iothread parameter (BZ#1718992)
Detached device when trying to upgrade USB device firmware when in doing USB Passthrough via QEMU (BZ#1719228)
Which versions are affected by ALBA-2019:2715?
Linux distribution packages (2)
sgabios AlmaLinux:8 | All versions | 1:0.20170427git-3.module_el8.6.0+2880+7d9e3703 |
sgabios-bin AlmaLinux:8 | All versions | 1:0.20170427git-3.module_el8.6.0+2880+7d9e3703 |
How do I fix ALBA-2019:2715?
Apply the vendor's patch.
Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.
Is ALBA-2019:2715 being exploited?
There is no known exploitation of ALBA-2019:2715 in the wild and no public exploit code.