CVE-2018-14678
High
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.
SeverityHigh
CVSS7.8
Exploit probability—
Product
Linux Kernel
PublishedJul 28, 2018
First seenJul 28, 2018
How to fix
Update
- linux linux_kernel4.14.61, 4.17.13 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| linux linux_kernel | 4.14.21 ≤ v < 4.14.61, 4.15.5 ≤ v < 4.17.13 | 4.14.61, 4.17.13 |
| xen xen | v ≤ 4.11.0 | — |
| debian debian_linux | 8.0, 9.0 | — |
| canonical ubuntu_linux | 14.04, 16.04, 18.04 | — |
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