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Vulnerability · Published Feb 24, 2022 · Assigned by redhat

CVE-2021-3607

Medium 6.0

In plain English

A medium-severity integer overflow in QEMU. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 23% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS NVD)6.0Medium
Exploit odds (30 days)0.3%top 77.2% of all CVEs
Exploited in the wildNo reportsnot in CISA KEV
Attack toolingNoneno public tooling known

Official description

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 packages & fixed versions

EcosystemPackageFixed inAdvisory
Debian:12qemu1:5.2+dfsg-11DEBIAN-CVE-2021-3607
Debian:13qemu1:5.2+dfsg-11DEBIAN-CVE-2021-3607
Debian:14qemu1:5.2+dfsg-11DEBIAN-CVE-2021-3607
Ubuntu:22.04:LTSqemu1:6.0+dfsg-2expubuntu1UBUNTU-CVE-2021-3607

Affected products (as reported)

VendorProductVersions
n/a QEMU qemu-kvm 6.1.0

Weakness: CWE-190

References