Instituto Nacional de ciberseguridad. Sección Incibe
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CVE-2025-21724

Severity CVSS v4.0:
Pending analysis
Type:
CWE-787 Out-of-bounds Write
Publication date:
27/02/2025
Last modified:
03/11/2025

Description

In the Linux kernel, the following vulnerability has been resolved:<br /> <br /> iommufd/iova_bitmap: Fix shift-out-of-bounds in iova_bitmap_offset_to_index()<br /> <br /> Resolve a UBSAN shift-out-of-bounds issue in iova_bitmap_offset_to_index()<br /> where shifting the constant "1" (of type int) by bitmap-&gt;mapped.pgshift<br /> (an unsigned long value) could result in undefined behavior.<br /> <br /> The constant "1" defaults to a 32-bit "int", and when "pgshift" exceeds<br /> 31 (e.g., pgshift = 63) the shift operation overflows, as the result<br /> cannot be represented in a 32-bit type.<br /> <br /> To resolve this, the constant is updated to "1UL", promoting it to an<br /> unsigned long type to match the operand&amp;#39;s type.

Impact

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

Base Score: 7.80 HIGH
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

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

Base Score 3.x
7.80
Severity 3.x
HIGH

Vulnerable products and versions

CPE From Up to
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* 6.1 (including) 6.1.129 (excluding)
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* 6.2 (including) 6.6.76 (excluding)
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* 6.7 (including) 6.12.13 (excluding)
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* 6.13 (including) 6.13.2 (excluding)

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


References to Advisories, Solutions, and Tools