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
Link | Resource |
---|---|
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
History
21 Nov 2024, 08:17
Type | Values Removed | Values Added |
---|---|---|
CVSS |
v2 : v3 : |
v2 : unknown
v3 : 7.0 |
References | () 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 |
02 Aug 2023, 13:49
Type | Values Removed | Values Added |
---|---|---|
CVSS |
v2 : v3 : |
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 - Third Party Advisory | |
References | (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