CVE-2023-3640

Katalog CVE

CVSS 7.8 · High EPSS 0,76%

Kerentanan Covert Timing Channel pada linux kernel, redhat enterprise linux. Skor CVSS 3.1 7.8 (High) menurut NVD.

Deskripsi (NVD)

A possible unauthorized memory access flaw was found in the Linux kernel's cpu_entry_area mapping of X86 CPU data to memory, where a user may guess the location of exception stacks or other important data. Based on the previous CVE-2023-0597, the 'Randomize per-cpu entry area' feature was implemented in /arch/x86/mm/cpu_entry_area.c, which works through the init_cea_offsets() function when KASLR is enabled. However, despite this feature, there is still a risk of per-cpu entry area leaks. This issue could allow a local user to gain access to some important data with memory in an expected location and potentially escalate their privileges on the system.

Rincian

Terbit di NVD

24 Juli 2023

Terakhir diubah

21 Juli 2026

Status NVD

Modified

CVSS 3.1

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

Jenis kelemahan (CWE)

CWE-385: Covert Timing Channel
CWE-203: Observable Discrepancy

EPSS (30 hari)

0,76% peluang dieksploitasi; lebih tinggi dari 54,1% CVE lain

Produk dan versi terdampak

> Data dari konfigurasi CPE di NVD.

Referensi dan perbaikan

• https://access.redhat.com/security/cve/CVE-2023-3640 advisory pihak ketiga
• https://bugzilla.redhat.com/show_bug.cgi?id=2217523 issue tracking · advisory pihak ketiga
• https://access.redhat.com/errata/RHSA-2023:6583