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.
References
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

21 Nov 2024, 08:17

Type Values Removed Values Added
CVSS v2 : unknown
v3 : 7.8
v2 : unknown
v3 : 7.0
References () https://access.redhat.com/security/cve/CVE-2023-3640 - Third Party Advisory () https://access.redhat.com/security/cve/CVE-2023-3640 - Third Party Advisory
References () https://bugzilla.redhat.com/show_bug.cgi?id=2217523 - Issue Tracking, Third Party Advisory () https://bugzilla.redhat.com/show_bug.cgi?id=2217523 - Issue Tracking, Third Party Advisory

02 Aug 2023, 13:49

Type Values Removed Values Added
CVSS v2 : unknown
v3 : unknown
v2 : unknown
v3 : 7.8
First Time Linux linux Kernel
Linux
Redhat
Redhat enterprise Linux
References (MISC) https://access.redhat.com/security/cve/CVE-2023-3640 - (MISC) https://access.redhat.com/security/cve/CVE-2023-3640 - Third Party Advisory
References (MISC) https://bugzilla.redhat.com/show_bug.cgi?id=2217523 - (MISC) https://bugzilla.redhat.com/show_bug.cgi?id=2217523 - Issue Tracking, Third Party Advisory
CWE CWE-203
CPE cpe:2.3:o:linux:linux_kernel:-:*:*:*:*:*:*:*
cpe:2.3:o:redhat:enterprise_linux:8.0:*:*:*:*:*:*:*
cpe:2.3:o:redhat:enterprise_linux:9.0:*:*:*:*:*:*:*

24 Jul 2023, 16:15

Type Values Removed Values Added
New CVE

Information

Published : 2023-07-24 16:15

Updated : 2024-11-21 08:17


NVD link : CVE-2023-3640

Mitre link : CVE-2023-3640

CVE.ORG link : CVE-2023-3640


JSON object : View

Products Affected

linux

  • linux_kernel

redhat

  • enterprise_linux
CWE
CWE-203

Observable Discrepancy