CVE-2021-20196
MEDIUM6.5EPSS 0.04%qemu - security update
發布日:2021/5/26修改日:2026/4/28
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.
受影響套件(2)
- Debian/qemufrom 0, < 1:5.2+dfsg-11+deb11u3
- Debian/qemufrom 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 |