CVE-2021-4206
Published: 29 April 2022
A flaw was found in the QXL display device emulation in QEMU. An integer overflow in the cursor_alloc() function can lead to the allocation of a small cursor object followed by a subsequent heap-based buffer overflow. This flaw allows a malicious privileged guest user to crash the QEMU process on the host or potentially execute arbitrary code within the context of the QEMU process.
Priority
Status
Package | Release | Status |
---|---|---|
qemu Launchpad, Ubuntu, Debian |
bionic |
Released
(1:2.11+dfsg-1ubuntu7.40)
|
focal |
Released
(1:4.2-3ubuntu6.23)
|
|
impish |
Released
(1:6.0+dfsg-2expubuntu1.3)
|
|
jammy |
Released
(1:6.2+dfsg-2ubuntu6.2)
|
|
kinetic |
Released
(1:6.2+dfsg-2ubuntu8)
|
|
lunar |
Released
(1:6.2+dfsg-2ubuntu8)
|
|
mantic |
Released
(1:6.2+dfsg-2ubuntu8)
|
|
trusty |
Needs triage
|
|
upstream |
Needs triage
|
|
xenial |
Needs triage
|
|
Patches: upstream: https://git.qemu.org/?p=qemu.git;a=commit;h=fa892e9abb728e76afcf27323ab29c57fb0fe7aa |
Severity score breakdown
Parameter | Value |
---|---|
Base score | 8.2 |
Attack vector | Local |
Attack complexity | Low |
Privileges required | High |
User interaction | None |
Scope | Changed |
Confidentiality | High |
Integrity impact | High |
Availability impact | High |
Vector | CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H |