CVE-2021-20196

Katalog CVE

CVSS 6.5 · Medium EPSS 0,48%

Kerentanan NULL Pointer Dereference pada qemu, debian linux. Skor CVSS 3.1 6.5 (Medium) menurut NVD.

Deskripsi (NVD)

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.

Rincian

Terbit di NVD

26 Mei 2021

Terakhir diubah

17 Juni 2026

Status NVD

Modified

CVSS 3.1

6.5 (Medium), sumber NVD
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H · uraikan di kalkulator

Jenis kelemahan (CWE)

CWE-476: NULL Pointer Dereference

EPSS (30 hari)

0,48% peluang dieksploitasi; lebih tinggi dari 39,6% CVE lain

Produk dan versi terdampak

> Data dari konfigurasi CPE di NVD.

Referensi dan perbaikan

• https://bugs.launchpad.net/qemu/+bug/1912780 exploit · patch · advisory pihak ketiga
• https://www.openwall.com/lists/oss-security/2021/01/28/1 mailing list · patch · advisory pihak ketiga
• https://lists.debian.org/debian-lts-announce/2022/04/msg00002.html mailing list · advisory pihak ketiga
• https://lists.debian.org/debian-lts-announce/2022/09/msg00008.html mailing list · advisory pihak ketiga
• https://security.netapp.com/advisory/ntap-20210708-0004/ advisory pihak ketiga