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Vulnerability of QEMU: use after free via hw/usb/hcd-ehci.c

Synthesis of the vulnerability 

An attacker, inside a guest system, can force the usage of a freed memory area via hw/usb/hcd-ehci.c of QEMU, in order to trigger a denial of service, and possibly to run code on the host system.
Vulnerable products: Debian, BIG-IP Hardware, TMOS, openSUSE Leap, QEMU, SUSE Linux Enterprise Desktop, SLES, Ubuntu.
Severity of this weakness: 2/4.
Creation date: 17/09/2020.
Références of this bulletin: CVE-2020-25084, DLA-2560-1, K41301038, openSUSE-SU-2021:0600-1, SUSE-SU-2021:1240-1, SUSE-SU-2021:1241-1, SUSE-SU-2021:1242-1, SUSE-SU-2021:1243-1, SUSE-SU-2021:1244-1, SUSE-SU-2021:1245-1, SUSE-SU-2021:1305-1, SUSE-SU-2021:14704-1, SUSE-SU-2021:14706-1, USN-4650-1, VIGILANCE-VUL-33342.

Description of the vulnerability 

An attacker, inside a guest system, can force the usage of a freed memory area via hw/usb/hcd-ehci.c of QEMU, in order to trigger a denial of service, and possibly to run code on the host system.
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This computer vulnerability announce impacts software or systems such as Debian, BIG-IP Hardware, TMOS, openSUSE Leap, QEMU, SUSE Linux Enterprise Desktop, SLES, Ubuntu.

Our Vigil@nce team determined that the severity of this cybersecurity bulletin 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 threat alert.

Solutions for this threat 

QEMU: patch for hw/usb/hcd-ehci.c.
A patch is indicated in information sources.

Debian 9: new qemu packages.
New packages are available:
  Debian 9: qemu 1:2.8+dfsg-6+deb9u13

F5 BIG-IP: solution for QEMU CVE-2020-25084.
The solution is indicated in information sources.

openSUSE Leap 15.2: new qemu packages.
New packages are available:
  openSUSE Leap 15.2: qemu 4.2.1-lp152.9.12.1

SUSE LE 11 SP3: new kvm packages.
New packages are available:
  SUSE LE 11 SP3: kvm 1.4.2-53.38.1

SUSE LE 11 SP4: new kvm packages.
New packages are available:
  SUSE LE 11 SP4: kvm 1.4.2-60.34.1

SUSE LE 12 SP2: new qemu packages (23/04/2021).
New packages are available:
  SUSE LE 12 SP2: qemu 2.6.2-41.62.1

SUSE LE 12 SP3: new qemu packages (16/04/2021).
New packages are available:
  SUSE LE 12 SP3: qemu 2.9.1-6.47.1

SUSE LE 12 SP4: new qemu packages (16/04/2021).
New packages are available:
  SUSE LE 12 SP4: qemu 2.11.2-5.29.1

SUSE LE 12 SP5: new qemu packages (16/04/2021).
New packages are available:
  SUSE LE 12 SP5: qemu 3.1.1.1-48.2

SUSE LE 15 RTM: new qemu packages (16/04/2021).
New packages are available:
  SUSE LE 15 RTM: qemu 2.11.2-9.43.1

SUSE LE 15 SP1: new qemu packages (16/04/2021).
New packages are available:
  SUSE LE 15 SP1: qemu 3.1.1.1-9.24.3

SUSE LE 15 SP2: new qemu packages (16/04/2021).
New packages are available:
  SUSE LE 15 SP2: qemu 4.2.1-11.16.3

Ubuntu: new qemu packages.
New packages are available:
  Ubuntu 16.04 LTS: qemu 1:2.5+dfsg-5ubuntu10.48
  Ubuntu 18.04 LTS: qemu 1:2.11+dfsg-1ubuntu7.34
  Ubuntu 20.04 LTS: qemu 1:4.2-3ubuntu6.10
  Ubuntu 20.10: qemu 1:5.0-5ubuntu9.2
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