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.
History

Wed, 16 Apr 2025 15:00:00 +0000

Type Values Removed Values Added
CPEs cpe:/a:redhat:enterprise_linux:9

Tue, 15 Apr 2025 11:45:00 +0000

Type Values Removed Values Added
CPEs cpe:/a:redhat:enterprise_linux:9::appstream
cpe:/a:redhat:enterprise_linux:9::crb
cpe:/a:redhat:enterprise_linux:9::nfv
cpe:/a:redhat:enterprise_linux:9::realtime
cpe:/o:redhat:enterprise_linux:9::baseos
References

Wed, 05 Mar 2025 19:15:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}


cve-icon MITRE

Status: PUBLISHED

Assigner: redhat

Published:

Updated: 2025-04-15T11:40:03.124Z

Reserved: 2023-07-12T15:37:45.552Z

Link: CVE-2023-3640

cve-icon Vulnrichment

Updated: 2024-08-02T07:01:57.304Z

cve-icon NVD

Status : Modified

Published: 2023-07-24T16:15:13.063

Modified: 2025-04-15T12:15:17.840

Link: CVE-2023-3640

cve-icon Redhat

Severity : Moderate

Publid Date: 2023-06-23T00:00:00Z

Links: CVE-2023-3640 - Bugzilla