| Name | CVE-2016-1922 |
| Description | QEMU (aka Quick Emulator) built with the TPR optimization for 32-bit Windows guests support is vulnerable to a null pointer dereference flaw. It occurs while doing I/O port write operations via hmp interface. In that, 'current_cpu' remains null, which leads to the null pointer dereference. A user or process could use this flaw to crash the QEMU instance, resulting in DoS issue. |
| Source | CVE (at NVD; CERT, LWN, oss-sec, fulldisc, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more) |
| References | DSA-3469-1, DSA-3470-1, DSA-3471-1 |
| Debian Bugs | 811201 |
The table below lists information on source packages.
| Source Package | Release | Version | Status |
|---|---|---|---|
| qemu (PTS) | 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 | squeeze | (unfixed) | end-of-life | ||
| qemu | source | wheezy | 1.1.2+dfsg-6a+deb7u12 | DSA-3469-1 | ||
| qemu | source | jessie | 1:2.1+dfsg-12+deb8u5a | DSA-3471-1 | ||
| qemu | source | (unstable) | 1:2.5+dfsg-4 | 811201 | ||
| qemu-kvm | source | squeeze | (unfixed) | end-of-life | ||
| qemu-kvm | source | wheezy | 1.1.2+dfsg-6+deb7u12 | DSA-3470-1 | ||
| qemu-kvm | source | (unstable) | (unfixed) |
[squeeze] - qemu <end-of-life> (Unsupported in squeeze-lts)
[squeeze] - qemu-kvm <end-of-life> (Unsupported in squeeze-lts)
https://lists.gnu.org/archive/html/qemu-devel/2016-01/msg02812.html
https://bugzilla.redhat.com/show_bug.cgi?id=1283934
https://www.openwall.com/lists/oss-security/2016/01/16/1
Possibly introduced in http://git.qemu.org/?p=qemu.git;a=commit;h=4917cf44326a1bda2fd7f27303aff7a25ad86518 (v1.6.0-rc0)
kvmapic introduced after 1.0.50 (http://git.qemu.org/?p=qemu.git;a=commit;h=e5ad936b0fd7dfd7fd7908be6f9f1ca88f63b96b)