CVE-2016-6259
medium
CVSS v3
6.2
CVSS v4 NEW
—
VIR risk
6.2
Description
Xen 4.5.x through 4.7.x do not implement Supervisor Mode Access Prevention (SMAP) whitelisting in 32-bit exception and event delivery, which allows local 32-bit PV guest OS kernels to cause a denial of service (hypervisor and VM crash) by triggering a safety check.
Predictions
Exploit likelihood
62%
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
Debian Fixed 5 releases
| Version | Status | Fixed in |
|---|---|---|
| trixie | Fixed | 4.8.0~rc3-1 |
| sid | Fixed | 4.8.0~rc3-1 |
| forky | Fixed | 4.8.0~rc3-1 |
| bullseye | Fixed | 4.8.0~rc3-1 |
| bookworm | Fixed | 4.8.0~rc3-1 |
References
- http://support.citrix.com/article/CTX214954
- http://www.securityfocus.com/bid/92130
- http://www.securitytracker.com/id/1036447
- http://xenbits.xen.org/xsa/advisory-183.html
- http://xenbits.xen.org/xsa/xsa183-4.6.patch
- http://xenbits.xen.org/xsa/xsa183-unstable.patch
- https://security-tracker.debian.org/tracker/CVE-2016-6259
CWEs
CWE-20
Community-verified mitigations for this CVE will appear above when contributors publish them.
Verify integrity in audit chain (admin only). AS-IS.