CVE-2021-3748
Published: 31 August 2021
A use-after-free vulnerability was found in the virtio-net device of QEMU. It could occur when the descriptor's address belongs to the non direct access region, due to num_buffers being set after the virtqueue elem has been unmapped. A malicious guest could use this flaw to crash QEMU, resulting in a denial of service condition, or potentially execute code on the host with the privileges of the QEMU process.
Priority
Medium
CVSS 3 base score: 8.8
Status
| Package | Release | Status |
|---|---|---|
|
qemu Launchpad, Ubuntu, Debian |
bionic |
Released
(1:2.11+dfsg-1ubuntu7.39)
|
| focal |
Released
(1:4.2-3ubuntu6.21)
|
|
| hirsute |
Ignored
(reached end-of-life)
|
|
| impish |
Released
(1:6.0+dfsg-2expubuntu1.2)
|
|
| jammy |
Released
(1:6.2+dfsg-2ubuntu5)
|
|
| kinetic |
Released
(1:6.2+dfsg-2ubuntu5)
|
|
| trusty |
Needed
|
|
| upstream |
Needs triage
|
|
| xenial |
Needed
|
|
|
Patches: upstream: https://git.qemu.org/?p=qemu.git;a=commit;h=bedd7e93d01961fcb16a97ae45d93acf357e11f6 |
||