CVE-2021-4145

Katalog CVE

CVSS 6.5 · Medium EPSS 0,39%

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

Deskripsi (NVD)

A NULL pointer dereference issue was found in the block mirror layer of QEMU in versions prior to 6.2.0. The `self` pointer is dereferenced in mirror_wait_on_conflicts() without ensuring that it's not NULL. A malicious unprivileged user within the guest could use this flaw to crash the QEMU process on the host when writing data reaches the threshold of mirroring node.

Rincian

Terbit di NVD

25 Januari 2022

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)

0,39% peluang dieksploitasi; lebih tinggi dari 30,8% CVE lain

Produk dan versi terdampak

> Data dari konfigurasi CPE di NVD.

Referensi dan perbaikan

• https://bugzilla.redhat.com/show_bug.cgi?id=2034602 issue tracking · patch · advisory pihak ketiga
• https://gitlab.com/qemu-project/qemu/-/commit/66fed30c9cd11854fc878a4eceb507e915d7c9cd patch · advisory pihak ketiga
• https://security.gentoo.org/glsa/202208-27 advisory pihak ketiga
• https://security.netapp.com/advisory/ntap-20220311-0004/ advisory pihak ketiga