CVE-2021-20221

Published: 13 May 2021

An out-of-bounds heap buffer access issue was found in the ARM Generic Interrupt Controller emulator of QEMU up to and including qemu 4.2.0on aarch64 platform. The issue occurs because while writing an interrupt ID to the controller memory area, it is not masked to be 4 bits wide. It may lead to the said issue while updating controller state fields and their subsequent processing. A privileged guest user may use this flaw to crash the QEMU process on the host resulting in DoS scenario.

Priority

Low

CVSS 3 base score: 6.0

Status

Package Release Status
qemu
Launchpad, Ubuntu, Debian
Upstream Needs triage

Ubuntu 21.04 (Hirsute Hippo)
Released (1:5.2+dfsg-6ubuntu2)
Ubuntu 20.04 LTS (Focal Fossa)
Released (1:4.2-3ubuntu6.17)
Ubuntu 18.04 LTS (Bionic Beaver)
Released (1:2.11+dfsg-1ubuntu7.37)
Ubuntu 16.04 ESM (Xenial Xerus) Needs triage

Ubuntu 14.04 ESM (Trusty Tahr) Needs triage

Patches:
Upstream: https://git.qemu.org/?p=qemu.git;a=commit;h=edfe2eb4360cde4ed5d95bda7777edcb3510f76a
qemu-kvm
Launchpad, Ubuntu, Debian
Upstream Needs triage

Ubuntu 21.04 (Hirsute Hippo) Does not exist

Ubuntu 20.04 LTS (Focal Fossa) Does not exist

Ubuntu 18.04 LTS (Bionic Beaver) Does not exist

Ubuntu 16.04 ESM (Xenial Xerus) Does not exist

Ubuntu 14.04 ESM (Trusty Tahr) Does not exist