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.
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References
History
No history.
MITRE
Status: PUBLISHED
Assigner: redhat
Published: 2023-07-24T15:19:29.983Z
Updated: 2024-09-23T21:07:49.536Z
Reserved: 2023-07-12T15:37:45.552Z
Link: CVE-2023-3640
Vulnrichment
No data.
NVD
Status : Modified
Published: 2023-07-24T16:15:13.063
Modified: 2024-11-21T08:17:43.823
Link: CVE-2023-3640
Redhat