CVE-2021-4093

Katalog CVE

CVSS 8.8 · High EPSS 0,42%

Kerentanan Out-of-bounds Read pada linux kernel, redhat enterprise linux +2 lainnya. Skor CVSS 3.1 8.8 (High) menurut NVD.

Deskripsi (NVD)

A flaw was found in the KVM's AMD code for supporting the Secure Encrypted Virtualization-Encrypted State (SEV-ES). A KVM guest using SEV-ES can trigger out-of-bounds reads and writes in the host kernel via a malicious VMGEXIT for a string I/O instruction (for example, outs or ins) using the exit reason SVM_EXIT_IOIO. This issue results in a crash of the entire system or a potential guest-to-host escape scenario.

Rincian

Terbit di NVD

18 Februari 2022

Terakhir diubah

17 Juni 2026

Status NVD

Modified

CVSS 3.1

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

Jenis kelemahan (CWE)

CWE-125: Out-of-bounds Read
CWE-787: Out-of-bounds Write

EPSS (30 hari)

0,42% peluang dieksploitasi; lebih tinggi dari 34,4% CVE lain

Produk dan versi terdampak

> Data dari konfigurasi CPE di NVD.

Referensi dan perbaikan

• https://bugs.chromium.org/p/project-zero/issues/detail?id=2222 exploit · mailing list · patch · advisory pihak ketiga
• https://bugzilla.redhat.com/show_bug.cgi?id=2028584 issue tracking · patch · advisory pihak ketiga