CVE-2021-3607: Debian Linux

Medium severity, CVSS 6.0. EPSS: 0.3% chance of exploitation in the next 30 days.

An integer overflow was found in the QEMU implementation of VMWare's paravirtual RDMA device in versions prior to 6.1.0. The issue occurs while handling a "PVRDMA_REG_DSRHIGH" write from the guest due to improper input validation. This flaw allows a privileged guest user to make QEMU allocate a large amount of memory, resulting in a denial of service. The highest threat from this vulnerability is to system availability.

Affected products

• Debian Debian Linux: version 10.0 only
• Fedoraproject Fedora: version 34 only
• Qemu Qemu: before 6.1.0 (fixed in 6.1.0)

Published 2022-02-24. Last modified 2026-06-17.