Integer Overflow or Wraparound The advisory has been revoked - it doesn't affect any version of package qemu-kvm (opens in a new tab)
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-UBUNTU1204-QEMUKVM-1066568
- published2 Feb 2021
- disclosed25 Feb 2021
Introduced: 2 Feb 2021
CVE-2021-20203 (opens in a new tab)Amendment
The Ubuntu security team deemed this advisory irrelevant for Ubuntu:12.04.
NVD Description
Note: Versions mentioned in the description apply only to the upstream qemu-kvm package and not the qemu-kvm package as distributed by Ubuntu.
An integer overflow issue was found in the vmxnet3 NIC emulator of the QEMU for versions up to v5.2.0. It may occur if a guest was to supply invalid values for rx/tx queue size or other NIC parameters. A privileged guest user may use this flaw to crash the QEMU process on the host resulting in DoS scenario.
References
- http://people.ubuntu.com/~ubuntu-security/cve/CVE-2021-20203
- https://bugs.launchpad.net/qemu/+bug/1913873
- https://bugzilla.redhat.com/show_bug.cgi?id=1922441
- https://lists.debian.org/debian-lts-announce/2021/04/msg00009.html
- https://lists.debian.org/debian-lts-announce/2022/09/msg00008.html
- https://security.gentoo.org/glsa/202208-27