CVE-2025-21724

CVE-2025-21724

Título es
CVE-2025-21724

Jue, 27/02/2025 – 02:15

Gravedad 2.0 Txt
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Título en

CVE-2025-21724

Descripción en
In the Linux kernel, the following vulnerability has been resolved:

iommufd/iova_bitmap: Fix shift-out-of-bounds in iova_bitmap_offset_to_index()

Resolve a UBSAN shift-out-of-bounds issue in iova_bitmap_offset_to_index()
where shifting the constant "1" (of type int) by bitmap->mapped.pgshift
(an unsigned long value) could result in undefined behavior.

The constant "1" defaults to a 32-bit "int", and when "pgshift" exceeds
31 (e.g., pgshift = 63) the shift operation overflows, as the result
cannot be represented in a 32-bit type.

To resolve this, the constant is updated to "1UL", promoting it to an
unsigned long type to match the operand's type.

27/02/2025

27/02/2025

Gravedad 3.1 Txt Gravedad 3.1 (CVSS 3.1 Base Score)
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