low
3.2
CWE
835
Advisory Published
CVE Published
Updated

CVE-2020-14394

First published: Tue Dec 15 2020(Updated: )

An infinite loop flaw was found in the USB xHCI controller emulation of QEMU while computing the length of the Transfer Request Block (TRB) Ring. This flaw allows a privileged guest user to hang the QEMU process on the host, resulting in a denial of service.

Credit: secalert@redhat.com secalert@redhat.com

Affected SoftwareAffected VersionHow to fix
QEMU qemu=6.1.50
Fedoraproject Extra Packages For Enterprise Linux=7.0
Fedoraproject Fedora=33
Fedoraproject Fedora=37
Redhat Openstack Platform=10.0
Redhat Openstack Platform=13.0
Redhat Enterprise Linux=5.0
Redhat Enterprise Linux=6.0
Redhat Enterprise Linux=7.0
Redhat Enterprise Linux=8.0
Redhat Enterprise Linux=9.0
redhat/qemu-kvm<7.1.0
7.1.0
ubuntu/qemu<1:4.2-3ubuntu6.28
1:4.2-3ubuntu6.28
ubuntu/qemu<1:6.2+dfsg-2ubuntu6.16
1:6.2+dfsg-2ubuntu6.16
debian/qemu<=1:3.1+dfsg-8+deb10u8<=1:5.2+dfsg-11+deb11u2
1:3.1+dfsg-8+deb10u12
1:5.2+dfsg-11+deb11u3
1:7.2+dfsg-7+deb12u5
1:8.2.3+ds-2

Remedy

https://gitlab.com/qemu-project/qemu/-/issues/646

Remedy

https://lore.kernel.org/qemu-devel/20220802134834.454749-1-thuth@redhat.com/

Remedy

https://git.qemu.org/?p=qemu.git;a=commit;h=effaf5a240e03020f4ae953e10b764622c3e87cc

Remedy

https://gitlab.com/qemu-project/qemu/-/commit/effaf5a240e03020f4ae953e10b764622c3e87cc

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Reference Links

Parent vulnerabilities

(Appears in the following advisories)

Frequently Asked Questions

  • What is CVE-2020-14394?

    CVE-2020-14394 is an infinite loop flaw in the USB xHCI controller emulation of QEMU.

  • How does CVE-2020-14394 impact the QEMU process?

    CVE-2020-14394 allows a privileged guest user to hang the QEMU process on the host, resulting in a denial of service.

  • Which software versions are affected by CVE-2020-14394?

    QEMU versions up to and excluding 7.1.0 are affected by CVE-2020-14394.

  • What is the severity of CVE-2020-14394?

    The severity of CVE-2020-14394 is low, with a CVSS score of 3.2.

  • How can I fix CVE-2020-14394?

    To fix CVE-2020-14394, update your QEMU installation to version 7.1.0 or later.

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