FKIE_CVE-2023-3640

Vulnerability from fkie_nvd - Published: 2023-07-24 16:15 - Updated: 2025-04-15 12:15
Severity ?
7.0 (High) - CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
7.8 (High) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Summary
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.
References
secalert@redhat.comhttps://access.redhat.com/errata/RHSA-2023:6583
secalert@redhat.comhttps://access.redhat.com/security/cve/CVE-2023-3640Third Party Advisory
secalert@redhat.comhttps://bugzilla.redhat.com/show_bug.cgi?id=2217523Issue Tracking, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://access.redhat.com/security/cve/CVE-2023-3640Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://bugzilla.redhat.com/show_bug.cgi?id=2217523Issue Tracking, Third Party Advisory
Impacted products
Vendor Product Version
linux linux_kernel -
redhat enterprise_linux 8.0
redhat enterprise_linux 9.0
To clipboard 

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  • Confirmed: The vulnerability has been validated from an analyst's perspective.
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