DescriptionXen 4.1.x and 4.2.x, when the XSA-45 patch is in place, does not properly maintain references on pages stored for deferred cleanup, which allows local PV guest kernels to cause a denial of service (premature page free and hypervisor crash) or possible gain privileges via unspecified vectors.
SourceCVE (at NVD; oss-sec, fulldisc, OSVDB, EDB, Metasploit, Red Hat, Ubuntu, Gentoo, SuSE, Mageia, more)
NVD severityhigh (attack range: remote)
Debian/oldoldstablepackage xen is vulnerable.
Debian/oldstablenot vulnerable.
Debian/stablenot vulnerable.
Debian/testingnot vulnerable.
Debian/unstablenot vulnerable.

Vulnerable and fixed packages

The table below lists information on source packages.

Source PackageReleaseVersionStatus
xen (PTS)squeeze, squeeze (security)4.0.1-5.11vulnerable
wheezy (security), wheezy4.1.4-3+deb7u8fixed
stretch, sid, jessie (security), jessie4.4.1-9+deb8u1fixed

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

PackageTypeReleaseFixed VersionUrgencyOriginDebian Bugs


[squeeze] - xen <end-of-life> (Unsupported in squeeze-lts)
All Xen versions having the XSA-45/CVE-2013-1918 fixes applied are vulnerable

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