CVE-2025-40293iommufd: Don't overflow during division for dirty tracking
Updated under an hour ago ()
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No exploitation reported and no EPSS estimate yet.
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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.
- CVSS
- Not yet scored
- Weakness (CWE)
- Not given
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- Linux
- NVD analysis
- Deferred
- Record last updated
- May 11, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
Linux Linux linux:linux (from the name) | from 58ccf0190d19d9a8a41f8a02b9e06742b58df4a1 before 07105e61882ff4a7d58db63cc5f9e90c6c60506c; 58ccf0190d19d9a8a41f8a02b9e06742b58df4a1 builds before 4c8a4f1d34eced168cc0b3a3dfe7b6dcc2090f69; from 58ccf0190d19d9a8a41f8a02b9e06742b58df4a1 before de7f2c67ceb1941b05b04ac35458a03e93cc57b1; from 58ccf0190d19d9a8a41f8a02b9e06742b58df4a1 before dbf316fc90aa954dcd5440817f4b944627ed63e0; from 58ccf0190d19d9a8a41f8a02b9e06742b58df4a1 before cb30dfa75d55eced379a42fd67bd5fb7ec38555e | CNA record |
References
- https://git.kernel.org/stable/c/07105e61882ff4a7d58db63cc5f9e90c6c60506c
- https://git.kernel.org/stable/c/4c8a4f1d34eced168cc0b3a3dfe7b6dcc2090f69
- https://git.kernel.org/stable/c/de7f2c67ceb1941b05b04ac35458a03e93cc57b1
- https://git.kernel.org/stable/c/dbf316fc90aa954dcd5440817f4b944627ed63e0
- https://git.kernel.org/stable/c/cb30dfa75d55eced379a42fd67bd5fb7ec38555e
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.