CVE-2025-21724

Summary

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.

Affected Software

VendorProductVersion RangeStatus
LinuxLinux58ccf0190d19d9a8a41f8a02b9e06742b58df4a1 < 44d9c94b7a3f29a3e07c4753603a35e9b28842a3affected
LinuxLinux58ccf0190d19d9a8a41f8a02b9e06742b58df4a1 < 38ac76fc06bc6826a3e4b12a98efbe98432380a9affected
LinuxLinux58ccf0190d19d9a8a41f8a02b9e06742b58df4a1 < d5d33f01b86af44b23eea61ee309e4ef22c0cdfeaffected
LinuxLinux58ccf0190d19d9a8a41f8a02b9e06742b58df4a1 < b1f8453b8ff1ab79a03820ef608256c499769cb6affected
LinuxLinux58ccf0190d19d9a8a41f8a02b9e06742b58df4a1 < e24c1551059268b37f6f40639883eafb281b8b9caffected
LinuxLinux6.1affected
LinuxLinux0 < 6.1unaffected
LinuxLinux6.1.129 <= 6.1.*unaffected
LinuxLinux6.6.76 <= 6.6.*unaffected
LinuxLinux6.12.13 <= 6.12.*unaffected
LinuxLinux6.13.2 <= 6.13.*unaffected
LinuxLinux6.14 <= *unaffected

Weaknesses

ADP Enrichment

CVE Program Container

Additional References

Additional References

References