Out-of-bounds Write Affecting linux-virt package, versions <6.12.14-r0


Severity

Recommended
0.0
high
0
10

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Threat Intelligence

EPSS
0.03% (7th percentile)

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  • Snyk IDSNYK-MINIMOSLATEST-LINUXVIRT-13713358
  • published25 Oct 2025
  • disclosed27 Feb 2025

Introduced: 27 Feb 2025

CVE-2025-21724  (opens in a new tab)
CWE-787  (opens in a new tab)

How to fix?

Upgrade Minimos:latest linux-virt to version 6.12.14-r0 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream linux-virt package and not the linux-virt package as distributed by Minimos. See How to fix? for Minimos:latest relevant fixed versions and status.

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.

CVSS Base Scores

version 3.1