CVE-2018-7540

NameCVE-2018-7540
DescriptionAn issue was discovered in Xen through 4.10.x allowing x86 PV guest OS users to cause a denial of service (host OS CPU hang) via non-preemptable L3/L4 pagetable freeing.
SourceCVE (at NVD; CERT, LWN, oss-sec, fulldisc, bugtraq, EDB, Metasploit, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, Mageia, GitHub code/issues, web search, more)
ReferencesDLA-1300-1, DSA-4131-1
NVD severitymedium (attack range: local)

Vulnerable and fixed packages

The table below lists information on source packages.

Source PackageReleaseVersionStatus
xen (PTS)jessie (security), jessie4.4.1-9+deb8u10vulnerable
stretch (security)4.8.4+xsa273+shim4.10.1+xsa273-1+deb9u10fixed
buster, stretch, sid4.8.3+xsa267+shim4.10.1+xsa267-1+deb9u9fixed

The information below is based on the following data on fixed versions.

PackageTypeReleaseFixed VersionUrgencyOriginDebian Bugs
xensource(unstable)4.8.3+comet2+shim4.10.0+comet3-1+deb9u5medium
xensourcestretch4.8.3+comet2+shim4.10.0+comet3-1+deb9u5mediumDSA-4131-1
xensourcewheezy4.1.6.lts1-13mediumDLA-1300-1

Notes

https://xenbits.xen.org/xsa/advisory-252.html

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