CVE-2021-4206
qemu - security update
8.2
HIGH
CVSS 3.1
EPSS 0.16%
Description
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.
How to fix CVE-2021-4206
To remediate CVE-2021-4206, upgrade the affected package to a fixed version below.
- —upgrade to 1:5.2+dfsg-11+deb11u2 or later
- —upgrade to 1:5.2+dfsg-11+deb11u2 or later
Is CVE-2021-4206 being exploited?
Low — EPSS is 0.2%, meaning exploitation activity has not been observed at scale.
Affected packages (2)
- from 0, < 1:5.2+dfsg-11+deb11u2
- from 0, < 1:5.2+dfsg-11+deb11u2
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | HIGH8.2 | CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H |