Description
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.
Affected products
linux: linux kernel
References5
- git.kernel.org/stable/c/79fad1917802c28de51a479318a056a6fbe3e2f2 Patch
- git.kernel.org/stable/c/b42497e3c0e74db061eafad41c0cd7243c46436b Patch
- git.kernel.org/stable/c/d19b817540c0abe84854a64ee9ee34cecc3bbeef Patch
- git.kernel.org/stable/c/e42a046bb41dcdde4f766a17d8211842007ed537 Patch
- git.kernel.org/stable/c/ebb6021560b94649bec6b8faba6fe0dca2218e81 Patch
Metrics
- CVSS 3.1
-
7.8
HIGH
Score source: NVD
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H - EPSS — exploit probability
- 0% percentile: 7 · as of 8 November 2026
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