CVE-2021-4207
High
Description
A flaw was found in the QXL display device emulation in QEMU. A double fetch of guest controlled values `cursor->header.width` and `cursor->header.height` can lead to the allocation of a small cursor object followed by a subsequent heap-based buffer overflow. A malicious privileged guest user could use this flaw to crash the QEMU process on the host or potentially execute arbitrary code within the context of the QEMU process.
SeverityHigh
CVSS8.2
Exploit probability—
Product
Qemu
PublishedApr 29, 2022
First seenApr 29, 2022
Weakness typeCWE-362Race condition
How to fix
Update
- qemu qemu7.0.0 or later
Vendor advisories
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| qemu qemu | v < 7.0.0 | 7.0.0 |
| redhat enterprise_linux | 8.0 | — |
| debian debian_linux | 10.0, 11.0 | — |
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