CVE-2016-9386
high
CVSS v3
7.8
CVSS v4 NEW
—
VIR risk
7.8
Description
The x86 emulator in Xen does not properly treat x86 NULL segments as unusable when accessing memory, which might allow local HVM guest users to gain privileges via vectors involving "unexpected" base/limit values.
Predictions
Exploit likelihood
75%
Patch ETA
—
Heuristic predictions, AS-IS, for prioritization only.
Mitigations
No mitigations published for this CVE yet.
The vendor-content worker queues fetches as references arrive (check back in a few minutes). Or — if you've already worked around this in production — publish your fix to the community-verified tier.
✚ Propose a mitigation on Community → Mitigations published via the community go through AI scoring + 2 human reviewers + 7-day silent objection window before landing here withsource_tier=community-verified.
OS impact
| OS | Version | Status | Fixed in |
|---|---|---|---|
| sles | affected | | |
| debian | bookworm | fixed | 4.8.0-1 |
| debian | bullseye | fixed | 4.8.0-1 |
| debian | forky | fixed | 4.8.0-1 |
| debian | sid | fixed | 4.8.0-1 |
| debian | trixie | fixed | 4.8.0-1 |
References
- http://www.securityfocus.com/bid/94471
- http://www.securitytracker.com/id/1037340
- http://xenbits.xen.org/xsa/advisory-191.html
- https://security.gentoo.org/glsa/201612-56
- https://support.citrix.com/article/CTX218775
- https://www.suse.com/security/cve/CVE-2016-9386.html
- https://security-tracker.debian.org/tracker/CVE-2016-9386
CWEs
CWE-264
Community-verified mitigations for this CVE will appear above when contributors publish them.
Verify integrity in audit chain (admin only). AS-IS.