CVE-2021-3527
MEDIUM5.5EPSS 0.03%qemu - security update
發布日:2021/5/26修改日:2026/4/28
描述
A flaw was found in the USB redirector device (usb-redir) of QEMU. Small USB packets are combined into a single, large transfer request, to reduce the overhead and improve performance. The combined size of the bulk transfer is used to dynamically allocate a variable length array (VLA) on the stack without proper validation. Since the total size is not bounded, a malicious guest could use this flaw to influence the array length and cause the QEMU process to perform an excessive allocation on the stack, resulting in a denial of service.
受影響套件(2)
- Debian/qemufrom 0, < 1:5.2+dfsg-11
- Debian/qemufrom 0, < 1:2.8+dfsg-6+deb9u15
CVSS 分數
| 來源 | 版本 | 嚴重程度 | 向量 |
|---|---|---|---|
| osv | CVSS 3.1 | MEDIUM5.5 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H |