VULNERABILITY INTELLIGENCE

CVE-2023-3640

CVSS score7 HIGH
EPSS probability0.76%
CISA KEVNot currently listed
Published2023-07-24
Last modified2026-07-21
CVSS vectorCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H

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.

Weakness classification

  • secalert@redhat.com: CWE-385
  • nvd@nist.gov: CWE-203

Primary references