CVE-2018-14678

Description

An issue was discovered in the Linux kernel through 4.17.11, as used in Xen through 4.11.x. The xen_failsafe_callback entry point in arch/x86/entry/entry_64.S does not properly maintain RBX, which allows local users to cause a denial of service (uninitialized memory usage and system crash). Within Xen, 64-bit x86 PV Linux guest OS users can trigger a guest OS crash or possibly gain privileges.

Category

7.8
CVSS
Severity: High
CVSS 3.1 •
CVSS 2.0 •
EPSS 0.04%
Vendor Advisory debian.org Vendor Advisory ubuntu.com Vendor Advisory ubuntu.com Vendor Advisory xen.org
Affected: n/a n/a
Published at:
Updated at:

References

Link Tags
http://www.securitytracker.com/id/1041397 third party advisory vdb entry
https://lists.debian.org/debian-lts-announce/2018/10/msg00003.html third party advisory mailing list
https://xenbits.xen.org/xsa/advisory-274.html patch vendor advisory mitigation
http://www.securityfocus.com/bid/104924 third party advisory vdb entry
https://www.debian.org/security/2018/dsa-4308 third party advisory vendor advisory
https://usn.ubuntu.com/3931-1/ third party advisory vendor advisory
https://usn.ubuntu.com/3931-2/ third party advisory vendor advisory

Frequently Asked Questions

What is the severity of CVE-2018-14678?
CVE-2018-14678 has been scored as a high severity vulnerability.
How to fix CVE-2018-14678?
To fix CVE-2018-14678, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2018-14678 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2018-14678 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
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