CVE-2025-38688
- Source
- https://cve.org/CVERecord?id=CVE-2025-38688
- Import Source
- https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2025-38688.json
- JSON Data
- https://api.test.osv.dev/v1/vulns/CVE-2025-38688
- Downstream
- Published
- 2025-09-04T15:32:42Z
- Modified
- 2026-08-12T03:30:18Z
- Severity
-
- 8.8 (High) CVSS_V3 - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H CVSS Calculator
- Summary
- iommufd: Prevent ALIGN() overflow
- Details
-
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.
- Database specific
{ "cna_assigner": "Linux", "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/38xxx/CVE-2025-38688.json" }- References
-
- https://git.kernel.org/stable/c/79fad1917802c28de51a479318a056a6fbe3e2f2
- https://git.kernel.org/stable/c/b42497e3c0e74db061eafad41c0cd7243c46436b
- https://git.kernel.org/stable/c/d19b817540c0abe84854a64ee9ee34cecc3bbeef
- https://git.kernel.org/stable/c/e42a046bb41dcdde4f766a17d8211842007ed537
- https://git.kernel.org/stable/c/ebb6021560b94649bec6b8faba6fe0dca2218e81
- https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/38xxx/CVE-2025-38688.json
- https://nvd.nist.gov/vuln/detail/CVE-2025-38688
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
Affected packages
Git / git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
Affected ranges
- Type
- GIT
- Repo
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
- Events
-
Introduced51fe6141f0f64ae0bbc096a41a07572273e8c0efFixedd19b817540c0abe84854a64ee9ee34cecc3bbeefFixedebb6021560b94649bec6b8faba6fe0dca2218e81Fixede42a046bb41dcdde4f766a17d8211842007ed537Fixed79fad1917802c28de51a479318a056a6fbe3e2f2Fixedb42497e3c0e74db061eafad41c0cd7243c46436b