CVE-2021-47255

Katalog CVE

CVSS 7.1 · High EPSS 0,24%

Kerentanan pada linux kernel. Skor CVSS 3.1 7.1 (High) menurut NVD.

Deskripsi (NVD)

In the Linux kernel, the following vulnerability has been resolved: kvm: LAPIC: Restore guard to prevent illegal APIC register access Per the SDM, "any access that touches bytes 4 through 15 of an APIC register may cause undefined behavior and must not be executed." Worse, such an access in kvm_lapic_reg_read can result in a leak of kernel stack contents. Prior to commit 01402cf81051 ("kvm: LAPIC: write down valid APIC registers"), such an access was explicitly disallowed. Restore the guard that was removed in that commit.

Rincian

Terbit di NVD

21 Mei 2024

Terakhir diubah

17 Juni 2026

Status NVD

Analyzed

CVSS 3.1

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

EPSS (30 hari)

0,24% peluang dieksploitasi; lebih tinggi dari 14,4% CVE lain

Produk dan versi terdampak

> Data dari konfigurasi CPE di NVD.

Referensi dan perbaikan

• https://git.kernel.org/stable/c/018685461a5b9a9a70e664ac77aef0d7415a3fd5 patch
• https://git.kernel.org/stable/c/218bf772bddd221489c38dde6ef8e917131161f6 patch
• https://git.kernel.org/stable/c/a2aff09807fbe4018c269d3773a629949058b210 patch
• https://git.kernel.org/stable/c/bf99ea52970caeb4583bdba1192c1f9b53b12c84 patch