CVE-2025-21724

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 v3 7.8 HIGH

7.8^/10

CVSS v3 : HIGH

Vector :

Exploitability : 1.8 / Impact : 5.9

Attack Vector LOCAL

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://git.kernel.org/stable/c/38ac76fc06bc6826a3e4b12a98efbe98432380a9	Patch
https://git.kernel.org/stable/c/44d9c94b7a3f29a3e07c4753603a35e9b28842a3	Patch
https://git.kernel.org/stable/c/b1f8453b8ff1ab79a03820ef608256c499769cb6	Patch
https://git.kernel.org/stable/c/d5d33f01b86af44b23eea61ee309e4ef22c0cdfe	Patch
https://git.kernel.org/stable/c/e24c1551059268b37f6f40639883eafb281b8b9c	Patch
https://lists.debian.org/debian-lts-announce/2025/03/msg00028.html

Configurations

Configuration 1 (hide)

OR	cpe:2.3:o:linux:linux_kernel::::::::
	cpe:2.3:o:linux:linux_kernel::::::::
	cpe:2.3:o:linux:linux_kernel::::::::
	cpe:2.3:o:linux:linux_kernel::::::::

History

No history.

Information

Published : 2025-02-27 02:15

Updated : 2025-11-03 20:17

NVD link : CVE-2025-21724

Mitre link : CVE-2025-21724

CVE.ORG link : CVE-2025-21724

JSON object : View

Products Affected

linux

linux_kernel

CWE

CWE-787

Out-of-bounds Write

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