CVE-2025-38688
iommufd: Prevent ALIGN() overflow
CVSS Score
0.0
EPSS Score
0.0%
EPSS Percentile
0th
In the Linux kernel, the following vulnerability has been resolved: iommufd: Prevent ALIGN() overflow When allocating IOVA the candidate range gets aligned to the target alignment. If the range is close to ULONG_MAX then the ALIGN() can wrap resulting in a corrupted iova. Open code the ALIGN() using get_add_overflow() to prevent this. This simplifies the checks as we don't need to check for length earlier either. Consolidate the two copies of this code under a single helper. This bug would allow userspace to create a mapping that overlaps with some other mapping or a reserved range.
| Vendor | linux |
| Product | linux |
| Ecosystems | |
| Industries | Technology |
| Published | Sep 4, 2025 |
| Last Updated | May 11, 2026 |
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Affected Versions
Linux / Linux
51fe6141f0f64ae0bbc096a41a07572273e8c0ef < d19b817540c0abe84854a64ee9ee34cecc3bbeef 51fe6141f0f64ae0bbc096a41a07572273e8c0ef < ebb6021560b94649bec6b8faba6fe0dca2218e81 51fe6141f0f64ae0bbc096a41a07572273e8c0ef < e42a046bb41dcdde4f766a17d8211842007ed537 51fe6141f0f64ae0bbc096a41a07572273e8c0ef < 79fad1917802c28de51a479318a056a6fbe3e2f2 51fe6141f0f64ae0bbc096a41a07572273e8c0ef < b42497e3c0e74db061eafad41c0cd7243c46436b
Linux / Linux
6.2
References
git.kernel.org: https://git.kernel.org/stable/c/d19b817540c0abe84854a64ee9ee34cecc3bbeef git.kernel.org: https://git.kernel.org/stable/c/ebb6021560b94649bec6b8faba6fe0dca2218e81 git.kernel.org: https://git.kernel.org/stable/c/e42a046bb41dcdde4f766a17d8211842007ed537 git.kernel.org: https://git.kernel.org/stable/c/79fad1917802c28de51a479318a056a6fbe3e2f2 git.kernel.org: https://git.kernel.org/stable/c/b42497e3c0e74db061eafad41c0cd7243c46436b