What’s Vulnerable › Vulnerabilities

CVE-2020-27661

• Severity: medium (CVSS 6.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.3% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2021-06-02 · updated 2026-06-17
• Weakness: CWE-369

Description

A divide-by-zero issue was found in dwc2_handle_packet in hw/usb/hcd-dwc2.c in the hcd-dwc2 USB host controller emulation of QEMU. A malicious guest could use this flaw to crash the QEMU process on the host, resulting in a denial of service.

Affected products

• QEMU: through 5.1.1

References

• https://bugzilla.redhat.com/show_bug.cgi?id=1890653
• https://git.qemu.org/?p=qemu.git%3Ba=commit%3Bh=bea2a9e3e00b275dc40cfa09c760c715b8753e03
• https://lists.nongnu.org/archive/html/qemu-devel/2020-10/msg04263.html
• https://security.netapp.com/advisory/ntap-20210720-0010/
• https://www.mail-archive.com/debian-bugs-dist%40lists.debian.org/msg1770368.html
• https://bugzilla.redhat.com/show_bug.cgi?id=1890653
• https://git.qemu.org/?p=qemu.git%3Ba=commit%3Bh=bea2a9e3e00b275dc40cfa09c760c715b8753e03
• https://lists.nongnu.org/archive/html/qemu-devel/2020-10/msg04263.html
• https://security.netapp.com/advisory/ntap-20210720-0010/
• https://www.mail-archive.com/debian-bugs-dist%40lists.debian.org/msg1770368.html

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