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.
Metrics
CVSS 3.1 7.8/10
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:HWeakness enumeration
Affected software
| Vendor | Product | Versions |
|---|---|---|
| n/a | n/a | n/a |
References
- http://www.securityfocus.com/bid/104924Third Party Advisory, VDB Entry
- http://www.securitytracker.com/id/1041397Third Party Advisory, VDB Entry
- https://lists.debian.org/debian-lts-announce/2018/10/msg00003.htmlMailing List, Third 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.htmlMitigation, Patch, Vendor Advisory
- http://www.securityfocus.com/bid/104924Third Party Advisory, VDB Entry
- http://www.securitytracker.com/id/1041397Third Party Advisory, VDB Entry
- https://lists.debian.org/debian-lts-announce/2018/10/msg00003.htmlMailing List, Third 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.htmlMitigation, Patch, Vendor Advisory
Timeline
- Published
- Jul 28, 2018
- Last modified
- Jun 17, 2026
- NVD status
- Modified