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Vulnerability of libvirt: use after free via qemuAgentGetInterfaces

Synthesis of the vulnerability 

An attacker can force the usage of a freed memory area via qemuAgentGetInterfaces() of libvirt, in order to trigger a denial of service, and possibly to run code.
Vulnerable systems: Debian, openSUSE Leap, RHEL, SUSE Linux Enterprise Desktop, SLES.
Severity of this threat: 2/4.
Creation date: 02/10/2020.
Références of this weakness: CVE-2020-25637, DLA-2395-1, openSUSE-SU-2020:1777-1, openSUSE-SU-2020:1778-1, RHSA-2020:5040-01, RHSA-2020:5111-01, SUSE-SU-2020:2969-1, SUSE-SU-2020:2970-1, SUSE-SU-2020:3037-1, SUSE-SU-2020:3038-1, SUSE-SU-2020:3039-1, SUSE-SU-2020:3095-1, SUSE-SU-2020:3143-1, VIGILANCE-VUL-33476.

Description of the vulnerability 

An attacker can force the usage of a freed memory area via qemuAgentGetInterfaces() of libvirt, in order to trigger a denial of service, and possibly to run code.
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This security bulletin impacts software or systems such as Debian, openSUSE Leap, RHEL, SUSE Linux Enterprise Desktop, SLES.

Our Vigil@nce team determined that the severity of this cybersecurity announce is medium.

The trust level is of type confirmed by the editor, with an origin of user shell.

An attacker with a expert ability can exploit this vulnerability alert.

Solutions for this threat 

Debian 9: new libvirt packages.
New packages are available:
  Debian 9: libvirt 3.0.0-4+deb9u5

openSUSE Leap 15: new libvirt packages.
New packages are available:
  openSUSE Leap 15.1: libvirt 5.1.0-lp151.7.10.1
  openSUSE Leap 15.2: libvirt 6.0.0-lp152.9.6.2

RHEL 7.9: new libvirt packages.
New packages are available:
  RHEL 7.9: libvirt 4.5.0-36.el7_9.3

RHEL 8: new virt-8.2 module.
The following module is updated:
  RHEL 8 Module: virt:8.2

SUSE LE 12 SP2: new libvirt packages.
New packages are available:
  SUSE LE 12 SP2: libvirt 2.0.0-27.64.1

SUSE LE 12 SP3: new libvirt packages.
New packages are available:
  SUSE LE 12 SP3: libvirt 3.3.0-5.46.1

SUSE LE 12 SP4: new libvirt packages.
New packages are available:
  SUSE LE 12 SP4: libvirt 4.0.0-8.23.1

SUSE LE 12 SP5: new libvirt packages.
New packages are available:
  SUSE LE 12 SP5: libvirt 5.1.0-13.19.1

SUSE LE 15 RTM: new libvirt packages.
New packages are available:
  SUSE LE 15 RTM: libvirt 4.0.0-9.35.1

SUSE LE 15 SP1: new libvirt packages.
New packages are available:
  SUSE LE 15 SP1: libvirt 5.1.0-8.24.1

SUSE LE 15 SP2: new libvirt packages.
New packages are available:
  SUSE LE 15 SP2: libvirt 6.0.0-13.8.1
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