CVE-2021-20255
Published: 9 March 2021
A stack overflow via an infinite recursion vulnerability was found in the eepro100 i8255x device emulator of QEMU. This issue occurs while processing controller commands due to a DMA reentry issue. This flaw allows a guest user or process to consume CPU cycles or crash the QEMU process on the host, resulting in a denial of service. The highest threat from this vulnerability is to system availability.
Notes
Author | Note |
---|---|
mdeslaur | as of 2023-11-30, proposed patch has not been commited upstream |
Priority
Status
Package | Release | Status |
---|---|---|
qemu Launchpad, Ubuntu, Debian |
bionic |
Deferred
|
focal |
Deferred
|
|
groovy |
Ignored
(end of life)
|
|
hirsute |
Ignored
(end of life)
|
|
impish |
Ignored
(end of life)
|
|
jammy |
Deferred
|
|
kinetic |
Ignored
(end of life, was deferred)
|
|
lunar |
Ignored
(end of life, was deferred)
|
|
mantic |
Deferred
|
|
trusty |
Deferred
|
|
upstream |
Needs triage
|
|
xenial |
Deferred
|
|
qemu-kvm Launchpad, Ubuntu, Debian |
bionic |
Does not exist
|
focal |
Does not exist
|
|
groovy |
Does not exist
|
|
hirsute |
Does not exist
|
|
impish |
Does not exist
|
|
jammy |
Does not exist
|
|
kinetic |
Does not exist
|
|
lunar |
Does not exist
|
|
mantic |
Does not exist
|
|
trusty |
Does not exist
|
|
upstream |
Needs triage
|
|
xenial |
Does not exist
|
Severity score breakdown
Parameter | Value |
---|---|
Base score | 5.5 |
Attack vector | Local |
Attack complexity | Low |
Privileges required | Low |
User interaction | None |
Scope | Unchanged |
Confidentiality | None |
Integrity impact | None |
Availability impact | High |
Vector | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H |