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

No history.

cve-icon MITRE

Status: PUBLISHED

Assigner: redhat

Published: 2023-07-24T15:19:29.983Z

Updated: 2024-09-11T16:52:34.151Z

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

Link: CVE-2023-3640

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Modified

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

Modified: 2023-11-07T04:19:13.170

Link: CVE-2023-3640

cve-icon Redhat

Severity : Moderate

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

Links: CVE-2023-3640 - Bugzilla