Search/CVE-2023-3640
● CVE — High

CVE-2023-3640

Vendorlinux, redhatProductlinux kernel, enterprise linuxDiscoveredJul 24, 2023UpdatedJul 21, 2026

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.

CVSS v3.1
7 HIGH
EPSS
0.76%
probability of exploitation in 30 days
CISA KEV
Not listed
no confirmed exploitation reported
News coverage
0
sources referencing this CVE
Related IOCs
0
seen in the same coverage
CVSS v3.1 Detail
Attack VectorLOCAL
Attack ComplexityHIGH
Privileges RequiredLOW
User InteractionNONE
ScopeUNCHANGED
ConfidentialityHIGH
IntegrityHIGH
AvailabilityHIGH
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
Connections
3 relationships
Timeline
disclosure → media coverage
Jul 24, 2023
Disclosure — published as a CVE record. · last revised by NVD Jul 21, 2026
Public PoC (1)
Unverified third-party code — review before executing.