| Name | CVE-2015-7970 |
| Description | The p2m_pod_emergency_sweep function in arch/x86/mm/p2m-pod.c in Xen 3.4.x, 3.5.x, and 3.6.x is not preemptible, which allows local x86 HVM guest administrators to cause a denial of service (CPU consumption and possibly reboot) via crafted memory contents that triggers a "time-consuming linear scan," related to Populate-on-Demand. |
| 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 | DLA-479-1, DSA-3414-1 |
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+72-g01140da4e8-1 | fixed | |
| trixie (security) | 4.20.2+7-g1badcf5035-0+deb13u1 | fixed | |
| forky, trixie | 4.20.0+68-g35cb38b222-1 | fixed | |
| sid | 4.20.2+7-g1badcf5035-1 | 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 |
[wheezy] - xen <no-dsa> (Minor issue, too intrusive to backport)
[squeeze] - xen <end-of-life> (not supported in squeeze-lts)
http://xenbits.xen.org/xsa/advisory-150.html