Vulnerability 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.
CVSS Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Linux | Linux Kernel | >= 4.14.21, < 4.14.61 |
| Xen | Xen | <= 4.11.0 |
| Debian | Debian Linux | 8.0 |
| Canonical | Ubuntu Linux | 14.04 |
Related Weaknesses (CWE)
References
- http://www.securityfocus.com/bid/104924Third Party AdvisoryVDB Entry
- http://www.securitytracker.com/id/1041397Third Party AdvisoryVDB Entry
- https://lists.debian.org/debian-lts-announce/2018/10/msg00003.htmlMailing ListThird Party Advisory
- https://usn.ubuntu.com/3931-1/Third Party Advisory
- https://usn.ubuntu.com/3931-2/Third Party Advisory
- https://www.debian.org/security/2018/dsa-4308Third Party Advisory
- https://xenbits.xen.org/xsa/advisory-274.htmlMitigationPatchVendor Advisory
- http://www.securityfocus.com/bid/104924Third Party AdvisoryVDB Entry
- http://www.securitytracker.com/id/1041397Third Party AdvisoryVDB Entry
- https://lists.debian.org/debian-lts-announce/2018/10/msg00003.htmlMailing ListThird Party Advisory
- https://usn.ubuntu.com/3931-1/Third Party Advisory
- https://usn.ubuntu.com/3931-2/Third Party Advisory
- https://www.debian.org/security/2018/dsa-4308Third Party Advisory
- https://xenbits.xen.org/xsa/advisory-274.htmlMitigationPatchVendor Advisory
FAQ
What is CVE-2018-14678?
CVE-2018-14678 is a vulnerability with a CVSS score of 7.8 (HIGH). 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 all...
How severe is CVE-2018-14678?
CVE-2018-14678 has been rated HIGH with a CVSS base score of 7.8/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2018-14678?
Check the references section above for vendor advisories and patch information. Affected products include: Linux Linux Kernel, Xen Xen, Debian Debian Linux, Canonical Ubuntu Linux.