CVE-2025-21724 (GCVE-0-2025-21724)

Vulnerability from cvelistv5 – Published: 2025-02-27 02:07 – Updated: 2025-11-03 19:36
VLAI?
Title
iommufd/iova_bitmap: Fix shift-out-of-bounds in iova_bitmap_offset_to_index()
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.
Severity ?
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: 58ccf0190d19d9a8a41f8a02b9e06742b58df4a1 , < 44d9c94b7a3f29a3e07c4753603a35e9b28842a3 (git)
Affected: 58ccf0190d19d9a8a41f8a02b9e06742b58df4a1 , < 38ac76fc06bc6826a3e4b12a98efbe98432380a9 (git)
Affected: 58ccf0190d19d9a8a41f8a02b9e06742b58df4a1 , < d5d33f01b86af44b23eea61ee309e4ef22c0cdfe (git)
Affected: 58ccf0190d19d9a8a41f8a02b9e06742b58df4a1 , < b1f8453b8ff1ab79a03820ef608256c499769cb6 (git)
Affected: 58ccf0190d19d9a8a41f8a02b9e06742b58df4a1 , < e24c1551059268b37f6f40639883eafb281b8b9c (git)
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    Linux Linux Affected: 6.1
Unaffected: 0 , < 6.1 (semver)
Unaffected: 6.1.129 , ≤ 6.1.* (semver)
Unaffected: 6.6.76 , ≤ 6.6.* (semver)
Unaffected: 6.12.13 , ≤ 6.12.* (semver)
Unaffected: 6.13.2 , ≤ 6.13.* (semver)
Unaffected: 6.14 , ≤ * (original_commit_for_fix)
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      "title": "iommufd/iova_bitmap: Fix shift-out-of-bounds in iova_bitmap_offset_to_index()",
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  • Confirmed: The vulnerability has been validated from an analyst's perspective.
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