CVE-2021-3308

Katalog CVE

CVSS 5.5 · Medium EPSS 0,41%

Kerentanan pada xen, fedoraproject fedora. Skor CVSS 3.1 5.5 (Medium) menurut NVD.

Deskripsi (NVD)

An issue was discovered in Xen 4.12.3 through 4.12.4 and 4.13.1 through 4.14.x. An x86 HVM guest with PCI pass through devices can force the allocation of all IDT vectors on the system by rebooting itself with MSI or MSI-X capabilities enabled and entries setup. Such reboots will leak any vectors used by the MSI(-X) entries that the guest might had enabled, and hence will lead to vector exhaustion on the system, not allowing further PCI pass through devices to work properly. HVM guests with PCI pass through devices can mount a Denial of Service (DoS) attack affecting the pass through of PCI devices to other guests or the hardware domain. In the latter case, this would affect the entire host.

Rincian

Terbit di NVD

26 Januari 2021

Terakhir diubah

17 Juni 2026

Status NVD

Modified

CVSS 3.1

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

EPSS (30 hari)

0,41% peluang dieksploitasi; lebih tinggi dari 33,8% CVE lain

Produk dan versi terdampak

> Data dari konfigurasi CPE di NVD.

Referensi dan perbaikan

• http://xenbits.xen.org/xsa/advisory-360.html patch · advisory vendor
• http://www.openwall.com/lists/oss-security/2021/01/26/4 mailing list · patch · advisory pihak ketiga
• https://security.gentoo.org/glsa/202107-30 advisory pihak ketiga
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/S5C42TMQYB6SD...