CVE-2025-40293
iommufd: Don't overflow during division for dirty tracking
CVSS Score
0.0
EPSS Score
0.0%
EPSS Percentile
0th
In the Linux kernel, the following vulnerability has been resolved: iommufd: Don't overflow during division for dirty tracking If pgshift is 63 then BITS_PER_TYPE(*bitmap->bitmap) * pgsize will overflow to 0 and this triggers divide by 0. In this case the index should just be 0, so reorganize things to divide by shift and avoid hitting any overflows.
| Vendor | linux |
| Product | linux |
| Ecosystems | |
| Industries | Technology |
| Published | Dec 8, 2025 |
| Last Updated | May 11, 2026 |
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Affected Versions
Linux / Linux
58ccf0190d19d9a8a41f8a02b9e06742b58df4a1 < 07105e61882ff4a7d58db63cc5f9e90c6c60506c 58ccf0190d19d9a8a41f8a02b9e06742b58df4a1 < 4c8a4f1d34eced168cc0b3a3dfe7b6dcc2090f69 58ccf0190d19d9a8a41f8a02b9e06742b58df4a1 < de7f2c67ceb1941b05b04ac35458a03e93cc57b1 58ccf0190d19d9a8a41f8a02b9e06742b58df4a1 < dbf316fc90aa954dcd5440817f4b944627ed63e0 58ccf0190d19d9a8a41f8a02b9e06742b58df4a1 < cb30dfa75d55eced379a42fd67bd5fb7ec38555e
Linux / Linux
6.1
References
git.kernel.org: https://git.kernel.org/stable/c/07105e61882ff4a7d58db63cc5f9e90c6c60506c git.kernel.org: https://git.kernel.org/stable/c/4c8a4f1d34eced168cc0b3a3dfe7b6dcc2090f69 git.kernel.org: https://git.kernel.org/stable/c/de7f2c67ceb1941b05b04ac35458a03e93cc57b1 git.kernel.org: https://git.kernel.org/stable/c/dbf316fc90aa954dcd5440817f4b944627ed63e0 git.kernel.org: https://git.kernel.org/stable/c/cb30dfa75d55eced379a42fd67bd5fb7ec38555e