CVE-2021-20196
qemu - security update
6.5
MEDIUM
CVSS 3.1
EPSS 0.47%
描述
A NULL pointer dereference flaw was found in the floppy disk emulator of QEMU. This issue occurs while processing read/write ioport commands if the selected floppy drive is not initialized with a block device. This flaw allows a privileged guest user to crash the QEMU process on the host, resulting in a denial of service. The highest threat from this vulnerability is to system availability.
如何修補 CVE-2021-20196
要修補 CVE-2021-20196,請將受影響套件升級到下列已修補版本。
- —升級至 1:5.2+dfsg-11+deb11u3 或更新版本
- —升級至 1:2.8+dfsg-6+deb9u17 或更新版本
CVE-2021-20196 正在被利用嗎?
低 — EPSS 為 0.5%,目前沒有觀察到大規模利用活動。
受影響套件(2)
- from 0, < 1:5.2+dfsg-11+deb11u3
- from 0, < 1:2.8+dfsg-6+deb9u17
CVSS 分數
| 來源 | 版本 | 嚴重程度 | 向量 |
|---|---|---|---|
| osv | CVSS 3.1 | MEDIUM6.5 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H |