| Name | CVE-2015-7972 |
| Description | The (1) libxl_set_memory_target function in tools/libxl/libxl.c and (2) libxl__build_post function in tools/libxl/libxl_dom.c in Xen 3.4.x through 4.6.x do not properly calculate the balloon size when using the populate-on-demand (PoD) system, which allows local HVM guest users to cause a denial of service (guest crash) via unspecified vectors related to "heavy memory pressure." |
| Source | CVE (at NVD; CERT, LWN, oss-sec, fulldisc, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more) |
| References | DLA-479-1, DSA-3414-1 |
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 |
| 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 | squeeze | (unfixed) | end-of-life | | |
| xen | source | wheezy | 4.1.6.1-1+deb7u1 | | DLA-479-1 | |
| xen | source | jessie | 4.4.1-9+deb8u3 | | DSA-3414-1 | |
| xen | source | (unstable) | 4.6.0-1 | | | |
Notes
[wheezy] - xen <no-dsa> (Minor issue, xl not used in wheezy)
[squeeze] - xen <end-of-life> (not supported in squeeze-lts)
http://xenbits.xen.org/xsa/advisory-153.html