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computer vulnerability announce CVE-2017-5525

QEMU: memory leak via the audio driver ac97

Synthesis of the vulnerability

An attacker in tghe guest system can create a memory leak in the ac97 audio device driver of QEMU, in order to trigger a denial of service against the host system.
Impacted products: Fedora, openSUSE Leap, QEMU, SUSE Linux Enterprise Desktop, SLES, Ubuntu.
Severity: 2/4.
Creation date: 18/01/2017.
Identifiers: CVE-2017-5525, FEDORA-2017-31b976672b, FEDORA-2017-62ac1230f7, FEDORA-2017-cdb53b04e0, FEDORA-2017-d4ee7018c1, openSUSE-SU-2017:0707-1, openSUSE-SU-2017:1312-1, SUSE-SU-2017:0625-1, SUSE-SU-2017:1241-1, USN-3261-1, VIGILANCE-VUL-21607.

Description of the vulnerability

The QEMU product can emulate the audio device ac97.

However, some memory areas are are not freed at software unplugging time.

An attacker, inside a guest system, can therefore create a memory leak in the ac97 audio device driver of QEMU, in order to trigger a denial of service against the host system.
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