CVE-2021-4095

Katalog CVE

CVSS 5.5 · Medium EPSS 0,39%

Kerentanan NULL Pointer Dereference pada linux kernel, fedoraproject fedora. Skor CVSS 3.1 5.5 (Medium) menurut NVD.

Deskripsi (NVD)

A NULL pointer dereference was found in the Linux kernel's KVM when dirty ring logging is enabled without an active vCPU context. An unprivileged local attacker on the host may use this flaw to cause a kernel oops condition and thus a denial of service by issuing a KVM_XEN_HVM_SET_ATTR ioctl. This flaw affects Linux kernel versions prior to 5.17-rc1.

Rincian

Terbit di NVD

10 Maret 2022

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

Jenis kelemahan (CWE)

CWE-476: NULL Pointer Dereference

EPSS (30 hari)

0,39% peluang dieksploitasi; lebih tinggi dari 30,9% CVE lain

Produk dan versi terdampak

> Data dari konfigurasi CPE di NVD.

Referensi dan perbaikan

• http://www.openwall.com/lists/oss-security/2022/01/17/1 exploit · mailing list · patch · advisory pihak ketiga
• https://bugzilla.redhat.com/show_bug.cgi?id=2031194 exploit · issue tracking · patch · advisory pihak ketiga
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/QIOQN7JJNN6AB...
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/VT6573CGKVK3D...