| Name | CVE-2018-19965 | 
| Description | An issue was discovered in Xen through 4.11.x allowing 64-bit PV guest OS users to cause a denial of service (host OS crash) because #GP[0] can occur after a non-canonical address is passed to the TLB flushing code. NOTE: this issue exists because of an incorrect CVE-2017-5754 (aka Meltdown) mitigation. | 
| Source | CVE (at NVD; CERT, ENISA, LWN, oss-sec, fulldisc, Debian ELTS, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more) | 
| References | DSA-4369-1 | 
Vulnerable and fixed packages
The table below lists information on source packages.
| Source Package | Release | Version | Status | 
|---|
| xen (PTS) | bullseye | 4.14.6-1 | fixed | 
|  | bullseye (security) | 4.14.5+94-ge49571868d-1 | fixed | 
|  | bookworm | 4.17.5+23-ga4e5191dc0-1+deb12u1 | fixed | 
|  | bookworm (security) | 4.17.5+23-ga4e5191dc0-1 | fixed | 
|  | forky, sid, trixie | 4.20.0+68-g35cb38b222-1 | fixed | 
The information below is based on the following data on fixed versions.
| Package | Type | Release | Fixed Version | Urgency | Origin | Debian Bugs | 
|---|
| xen | source | stretch | 4.8.5+shim4.10.2+xsa282-1+deb9u11 |  | DSA-4369-1 |  | 
| xen | source | (unstable) | 4.11.1-1 |  |  |  | 
Notes
[jessie] - xen <ignored> (Depends on fix for CVE-2017-5715, CVE-2017-5753, CVE-2017-5754)
https://xenbits.xen.org/xsa/advisory-279.txt