Name | CVE-2015-2756 |
Description | QEMU, as used in Xen 3.3.x through 4.5.x, does not properly restrict access to PCI command registers, which might allow local HVM guest users to cause a denial of service (non-maskable interrupt and host crash) by disabling the (1) memory or (2) I/O decoding for a PCI Express device and then accessing the device, which triggers an Unsupported Request (UR) response. |
Source | CVE (at NVD; CERT, LWN, oss-sec, fulldisc, bugtraq, EDB, Metasploit, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, Mageia, GitHub code/issues, web search, more) |
References | DLA-479-1, DSA-3259-1 |
NVD severity | medium |
Debian Bugs | 781620 |
The table below lists information on source packages.
Source Package | Release | Version | Status |
---|---|---|---|
qemu (PTS) | stretch | 1:2.8+dfsg-6+deb9u9 | fixed |
stretch (security) | 1:2.8+dfsg-6+deb9u12 | fixed | |
buster, buster (security) | 1:3.1+dfsg-8+deb10u8 | fixed | |
bullseye, sid | 1:5.2+dfsg-3 | fixed | |
xen (PTS) | stretch (security), stretch | 4.8.5.final+shim4.10.4-1+deb9u12 | fixed |
buster | 4.11.4+37-g3263f257ca-1 | fixed | |
buster (security) | 4.11.4+57-g41a822c392-2 | fixed | |
bullseye, sid | 4.14.0+88-g1d1d1f5391-2 | fixed |
The information below is based on the following data on fixed versions.
Package | Type | Release | Fixed Version | Urgency | Origin | Debian Bugs |
---|---|---|---|---|---|---|
qemu | source | squeeze | (not affected) | |||
qemu | source | wheezy | (not affected) | |||
qemu | source | jessie | 1:2.1+dfsg-12 | DSA-3259-1 | ||
qemu | source | (unstable) | 1:2.3+dfsg-3 | |||
qemu-kvm | source | (unstable) | (not affected) | |||
xen | source | squeeze | (unfixed) | end-of-life | ||
xen | source | wheezy | 4.1.6.1-1+deb7u1 | DLA-479-1 | ||
xen | source | (unstable) | 4.2.0~rc2-1 | 781620 |
[squeeze] - xen <end-of-life> (Not supported in Squeeze LTS)
[wheezy] - qemu <not-affected> (Vulnerable code not present)
[squeeze] - qemu <not-affected> (Vulnerable code not present)
- qemu-kvm <not-affected> (Vulnerable code not present)
http://xenbits.xen.org/xsa/advisory-126.html