CVE-2016-9923

NameCVE-2016-9923
DescriptionQuick Emulator (Qemu) built with the 'chardev' backend support is vulnerable to a use after free issue. It could occur while hotplug and unplugging the device in the guest. A guest user/process could use this flaw to crash a Qemu process on the host resulting in DoS.
SourceCVE (at NVD; CERT, LWN, oss-sec, fulldisc, bugtraq, EDB, Metasploit, Red Hat, Ubuntu, Gentoo, SuSE, Mageia, GitHub code/issues, web search, more)
NVD severitylow (attack range: local)
Debian Bugs847957

Vulnerable and fixed packages

The table below lists information on source packages.

Source PackageReleaseVersionStatus
qemu (PTS)wheezy1.1.2+dfsg-6a+deb7u12vulnerable
wheezy (security)1.1.2+dfsg-6+deb7u23vulnerable
jessie, jessie (security)1:2.1+dfsg-12+deb8u6vulnerable
stretch1:2.8+dfsg-6fixed
stretch (security)1:2.8+dfsg-6+deb9u2fixed
buster, sid1:2.8+dfsg-7fixed
qemu-kvm (PTS)wheezy1.1.2+dfsg-6+deb7u12vulnerable
wheezy (security)1.1.2+dfsg-6+deb7u23vulnerable

The information below is based on the following data on fixed versions.

PackageTypeReleaseFixed VersionUrgencyOriginDebian Bugs
qemusource(unstable)1:2.8+dfsg-1low847957
qemu-kvmsource(unstable)(unfixed)low

Notes

[jessie] - qemu <no-dsa> (Minor issue)
[wheezy] - qemu <no-dsa> (Minor issue)
[wheezy] - qemu-kvm <no-dsa> (Minor issue)
https://lists.gnu.org/archive/html/qemu-devel/2016-10/msg05597.html
Fixed by: http://git.qemu.org/?p=qemu.git;a=commit;h=a4afa548fc6dd9842ed86639b4d37d4d1c4ad480 (v2.8.0-rc0)

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