Description (CNA)
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.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Red Hat / Red Hat Enterprise Linux 6 | unaffected |
| Red Hat / Red Hat Enterprise Linux 7 | unaffected |
| Red Hat / Red Hat Enterprise Linux 7 | unaffected |
| Red Hat / Red Hat Enterprise Linux 8 | affected |
| Red Hat / Red Hat Enterprise Linux 8 | affected |
| Red Hat / Red Hat Enterprise Linux 9 | affected |
| Red Hat / Red Hat Enterprise Linux 9 | affected |
CWE
CWE-385
References
- https://access.redhat.com/errata/RHSA-2023:6583
- https://access.redhat.com/security/cve/CVE-2023-3640
- https://bugzilla.redhat.com/show_bug.cgi?id=2217523
ADP enrichment
No English description supplied.
No English description supplied.
No references supplied.