CVE-2018-10853 Privilege escalation in kernel
An unprivileged guest user can escalate privileges within the guest OS due to missing privilege checks in KVM instruction emulation.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2018-10853?
CVE-2018-10853 is a high-severity vulnerability in Canonical Ubuntu Linux, published on 11 Sep 2018. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
A flaw was found in the way Linux kernel KVM hypervisor before 4.18 emulated instructions such as sgdt/sidt/fxsave/fxrstor. It did not check current privilege(CPL) level while emulating unprivileged instructions. An unprivileged guest user/process could use this flaw to potentially escalate privileges inside guest.
Which versions are affected by CVE-2018-10853?
It affects 3 products.
Linux distribution packages (5)
kgraft-patch-SLE12-SP1_Update_30 SUSE:Linux Enterprise Server 12 SP1-LTSS | All versions | 2-2.1 |
kgraft-patch-SLE12-SP2_Update_24 SUSE:Linux Enterprise Server 12 SP2-LTSS | All versions | 2-2.1 |
kgraft-patch-SLE12_Update_37 SUSE:Linux Enterprise Server 12-LTSS | All versions | 2-2.1 |
kgraft-patch-SLE12-SP1_Update_30 SUSE:Linux Enterprise Server for SAP Applications 12 SP1 | All versions | 2-2.1 |
kgraft-patch-SLE12-SP2_Update_24 SUSE:Linux Enterprise Server for SAP Applications 12 SP2 | All versions | 2-2.1 |
Products include Canonical Ubuntu Linux, Debian Debian Linux, Linux kernel.
How do I fix CVE-2018-10853?
Apply the vendor's patch.
Is CVE-2018-10853 being exploited?
There is no known exploitation of CVE-2018-10853 in the wild and no public exploit code.
Other vulnerabilities in Canonical Ubuntu Linux
Sources
Also known as DEBIAN-CVE-2018-10853, GHSA-vhcx-55j8-pv9c, SUSE-SU-2018:2684-1, UBUNTU-CVE-2018-10853.