Instituto Nacional de ciberseguridad. Sección Incibe
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CVE-2023-52576

Severity CVSS v4.0:
Pending analysis
Type:
CWE-416 Use After Free
Publication date:
02/03/2024
Last modified:
08/04/2025

Description

In the Linux kernel, the following vulnerability has been resolved:<br /> <br /> x86/mm, kexec, ima: Use memblock_free_late() from ima_free_kexec_buffer()<br /> <br /> The code calling ima_free_kexec_buffer() runs long after the memblock<br /> allocator has already been torn down, potentially resulting in a use<br /> after free in memblock_isolate_range().<br /> <br /> With KASAN or KFENCE, this use after free will result in a BUG<br /> from the idle task, and a subsequent kernel panic.<br /> <br /> Switch ima_free_kexec_buffer() over to memblock_free_late() to avoid<br /> that bug.

Impact

Vector 3.x
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H CVSS v3.1 Severity and Metrics:

Base Score: 5.50 MEDIUM
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Attack Vector (AV): Local
Attack Complexity (AC): Low
Privileges Required (PR): Low
User Interaction (UI): None
Scope (S): Unchanged
Confidentiality (C): None
Integrity (I): None
Availability (A): High

Base Score 3.x
5.50
Severity 3.x
MEDIUM

Vulnerable products and versions

CPE From Up to
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* 5.13 (including) 6.1.56 (excluding)
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* 6.2 (including) 6.5.6 (excluding)
cpe:2.3:o:linux:linux_kernel:6.6:rc1:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.6:rc2:*:*:*:*:*:*

To consult the complete list of CPE names with products and versions, see this page


References to Advisories, Solutions, and Tools