An integer overflow issue was found in the vmxnet3 NIC emulator of the QEMU. 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. Upstream patch: --------------- -> https://lists.gnu.org/archive/html/qemu-devel/2021-01/msg07935.html
Acknowledgments: Name: Gaoning Pan (Zhejiang University & Ant Security Light-Year Lab)
Statement: This issue does not affect the versions of the qemu-kvm package as shipped with Red Hat Enterprise Linux 5, 6, 7 and 8.
External References: https://bugs.launchpad.net/qemu/+bug/1913873
Created qemu tracking bugs for this issue: Affects: fedora-all [bug 1922719]
This bug is now closed. Further updates for individual products will be reflected on the CVE page(s): https://access.redhat.com/security/cve/cve-2021-20203
Fixed by https://gitlab.com/qemu-project/qemu/-/commit/d05dcd94aee88