CVE-2023-3640
- Source
- https://nvd.nist.gov/vuln/detail/CVE-2023-3640
- Import Source
- https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2023-3640.json
- JSON Data
- https://api.osv.dev/v1/vulns/CVE-2023-3640
- Downstream
- Published
- 2023-07-24T16:15:13Z
- Modified
- 2025-08-09T19:01:28Z
- Severity
-
- 7.8 (High) CVSS_V3 - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H CVSS Calculator
- Summary
- [none]
- Details
-
A possible unauthorized memory access flaw was found in the Linux kernel's cpuentryarea 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/cpuentryarea.c, which works through the initceaoffsets() 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.
- References