CVE-2023-3640
Published: Jul 24, 2023
Modified: Nov 14, 2025
CVSS v3.1
7.0
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.
| Vendor | Product | Versions |
|---|---|---|
Red Hat | Red Hat Enterprise Linux 9 | unaffected 0:5.14.0-362.8.1.el9_3 - < * |
Red Hat | Red Hat Enterprise Linux 9 | unaffected 0:5.14.0-362.8.1.el9_3 - < * |
Red Hat | Red Hat Enterprise Linux 6 | All versions |
Red Hat | Red Hat Enterprise Linux 7 | All versions |
Red Hat | Red Hat Enterprise Linux 7 | All versions |
Red Hat | Red Hat Enterprise Linux 8 | All versions |
Red Hat | Red Hat Enterprise Linux 8 | All versions |
Red Hat | Red Hat Enterprise Linux 9 | All versions |
Weaknesses (CWE)
CVSS v3.1 Details
CVSS v3.1 Vector
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality
Integrity
Availability
References
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