CVE-2015-8555
8.6
HIGH
CVSS 3.1
EPSS 0.55%
Description
Xen 4.6.x, 4.5.x, 4.4.x, 4.3.x, and earlier do not initialize x86 FPU stack and XMM registers when XSAVE/XRSTOR are not used to manage guest extended register state, which allows local guest domains to obtain sensitive information from other domains via unspecified vectors.
How to fix CVE-2015-8555
To remediate CVE-2015-8555, upgrade the affected package to a fixed version below.
- Debian/xen—upgrade to 4.8.0~rc3-1 or later
Is CVE-2015-8555 being exploited?
Low — EPSS is 0.6%, meaning exploitation activity has not been observed at scale.
Affected packages (1)
- from 0, < 4.8.0~rc3-1
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | HIGH8.6 | CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N |