| Name | CVE-2016-7421 |
| Description | The pvscsi_ring_pop_req_descr function in hw/scsi/vmw_pvscsi.c in QEMU (aka Quick Emulator) allows local guest OS administrators to cause a denial of service (infinite loop and QEMU process crash) by leveraging failure to limit process IO loop to the ring size. |
| 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-1599-1 |
| Debian Bugs | 838147 |
Vulnerable and fixed packages
The table below lists information on source packages.
| Source Package | Release | Version | Status |
|---|
| qemu (PTS) | jessie, jessie (lts) | 1:2.1+dfsg-12+deb8u23 | fixed |
| stretch (security) | 1:2.8+dfsg-6+deb9u17 | fixed |
| stretch (lts), stretch | 1:2.8+dfsg-6+deb9u19 | fixed |
| buster (security), buster, buster (lts) | 1:3.1+dfsg-8+deb10u12 | fixed |
| bullseye | 1:5.2+dfsg-11+deb11u3 | fixed |
| bullseye (security) | 1:5.2+dfsg-11+deb11u2 | fixed |
| bookworm | 1:7.2+dfsg-7+deb12u7 | fixed |
| sid, trixie | 1:9.1.1+ds-5 | fixed |
The information below is based on the following data on fixed versions.
| Package | Type | Release | Fixed Version | Urgency | Origin | Debian Bugs |
|---|
| qemu | source | wheezy | (not affected) | | | |
| qemu | source | jessie | 1:2.1+dfsg-12+deb8u8 | | DLA-1599-1 | |
| qemu | source | (unstable) | 1:2.7+dfsg-1 | | | 838147 |
| qemu-kvm | source | (unstable) | (not affected) | | | |
Notes
[wheezy] - qemu <not-affected> (Vulnerable code not present, introduced after 1.5)
- qemu-kvm <not-affected> (Vulnerable code not present, introduced after 1.5)
https://lists.gnu.org/archive/html/qemu-devel/2016-09/msg03609.html
https://bugzilla.redhat.com/show_bug.cgi?id=1376731
https://www.openwall.com/lists/oss-security/2016/09/16/3
Fixed by: http://git.qemu.org/?p=qemu.git;a=commit;h=d251157ac1928191af851d199a9ff255d330bec9