Entreprise française de cybersécurité depuis 2004
☎ 03 60 47 09 81 - info@securiteinfo.com
☎ 03 60 47 09 81 - info@securiteinfo.com
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.
No PoCs from references.
- https://github.com/XiaozaYa/linux-kernel-stack-pivoting-trick
- https://github.com/fkie-cad/nvd-json-data-feeds
- https://github.com/nomi-sec/PoC-in-GitHub
- https://github.com/pray77/CVE-2023-3640
- https://github.com/shakyaraj9569/Documentation