Vulnerability 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.
CVSS Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Linux | Linux Kernel | >= 6.2, < 6.6.103 |
References
- https://git.kernel.org/stable/c/79fad1917802c28de51a479318a056a6fbe3e2f2Patch
- https://git.kernel.org/stable/c/b42497e3c0e74db061eafad41c0cd7243c46436bPatch
- https://git.kernel.org/stable/c/d19b817540c0abe84854a64ee9ee34cecc3bbeefPatch
- https://git.kernel.org/stable/c/e42a046bb41dcdde4f766a17d8211842007ed537Patch
- https://git.kernel.org/stable/c/ebb6021560b94649bec6b8faba6fe0dca2218e81Patch
FAQ
What is CVE-2025-38688?
CVE-2025-38688 is a vulnerability with a CVSS score of 7.8 (HIGH). 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 c...
How severe is CVE-2025-38688?
CVE-2025-38688 has been rated HIGH with a CVSS base score of 7.8/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2025-38688?
Check the references section above for vendor advisories and patch information. Affected products include: Linux Linux Kernel.