CVE-2021-3608 Null dereference in QEMU

What is CVE-2021-3608?

CVE-2021-3608 is a medium-severity vulnerability in Debian Debian Linux, published on 24 Feb 2022. It can only be exploited from the same machine or local network, with no action from the victim.

Official description

A flaw 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 and may result in a crash of QEMU or cause undefined behavior due to the access of an uninitialized pointer. The highest threat from this vulnerability is to system availability.

Weakness: CWE-824

Which versions are affected by CVE-2021-3608?

It affects 3 products.

Products include Debian Debian Linux, Fedoraproject Fedora, Qemu Qemu.

How do I fix CVE-2021-3608?

Upgrade to a fixed version.

Is CVE-2021-3608 being exploited?

There is no known exploitation of CVE-2021-3608 in the wild and no public exploit code.

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All Debian Debian Linux vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as DEBIAN-CVE-2021-3608, GHSA-37hv-5w7w-hhjw, UBUNTU-CVE-2021-3608.