CVE-2025-38688
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.
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (0.16%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
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 3.1
- 7.8 HIGHCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- EPSS
- 0.16% probability · 6th percentile
- CISA KEV
- Not listed
- Affected
- linux/linux kernel
- Source
- 416baaa9-dc9f-4396-8d5f-8c081fb06d67
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
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.