CVE-2023-3640

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.

CVSS v3 7.0 HIGH

7.0^/10

CVSS v3 : HIGH

Vector :

Exploitability : 1.0 / Impact : 5.9

Attack Vector LOCAL

Attack Complexity HIGH

Privileges Required LOW

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://access.redhat.com/errata/RHSA-2023:6583
https://access.redhat.com/security/cve/CVE-2023-3640	Third Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=2217523	Issue Tracking Third Party Advisory
https://access.redhat.com/security/cve/CVE-2023-3640	Third Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=2217523	Issue Tracking Third Party Advisory

Configurations

Configuration 1 (hide)

cpe:2.3:o:linux:linux_kernel:-:*:*:*:*:*:*:*

Configuration 2 (hide)

OR	cpe:2.3:o:redhat:enterprise_linux:8.0:::::::*
	cpe:2.3:o:redhat:enterprise_linux:9.0:::::::*

History

15 Apr 2025, 12:15

Type	Values Removed	Values Added
References		() https://access.redhat.com/errata/RHSA-2023:6583 -

Information

Published : 2023-07-24 16:15

Updated : 2025-04-15 12:15

NVD link : CVE-2023-3640

Mitre link : CVE-2023-3640

CVE.ORG link : CVE-2023-3640

JSON object : View

Products Affected

redhat

enterprise_linux

linux

linux_kernel

CWE

CWE-203

Observable Discrepancy

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