AUGUST 4, 2026
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Case File

CVE-2023-3640

HIGH · CVSS 7 EPSS 0.76%

Source: NVD + CISA KEV + EPSS (historical backfill) · Published 2023-07-24 · Last synced 2026-08-04

CyberRota Analysis

This is a high severity vulnerability with a CVSS score of 7.0. It affects Linux.

CVE
CVE-2023-3640
Severity
HIGH
CVSS
7
EPSS
0.76%
Linux

Original NVD Description

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.

Related CVEs

Other vulnerabilities affecting the same vendor(s)