CVE-2023-3640

Updated: 2023-11-07 19:29:36.979135

Description:

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.


Links NIST CIRCL RHEL Ubuntu

Severity

Severity Score
CVSS Version 2.x 0
CVSS Version 3.x HIGH 7.8

Status

OS name Project name Version Score Severity Status Errata Last updated
AlmaLinux 9.2 ESU kernel 5.14.0 7.8 HIGH Needs Triage 2023-11-07 16:18:57
AlmaLinux 9.2 FIPS kernel 5.14.0 7.8 HIGH Needs Triage 2023-11-20 10:14:09
CentOS 6 ELS kernel 2.6.32 7.8 HIGH Needs Triage 2023-10-26 17:34:55
CentOS 7 ELS kernel 3.10.0 7.8 HIGH Needs Triage 2023-10-26 17:34:57
CentOS 8.4 ELS kernel 4.18.0 7.8 HIGH Needs Triage 2023-08-03 00:11:09
CentOS 8.5 ELS kernel 4.18.0 7.8 HIGH Needs Triage 2023-08-03 00:11:07
CloudLinux 6 ELS kernel 2.6.32 7.8 HIGH Needs Triage 2023-10-26 17:34:53
Oracle Linux 6 ELS kernel 2.6.32 7.8 HIGH Needs Triage 2023-10-26 17:34:56
Ubuntu 16.04 ELS linux 4.4.0 7.8 HIGH Needs Triage 2023-10-26 17:29:40
Ubuntu 16.04 ELS linux-hwe 4.15.0 7.8 HIGH Needs Triage 2023-10-26 17:28:19
Total: 11