Answer in brief
CVE-2025-38688 records a High severity (CVSS 8.8) vulnerability in iommufd: Prevent ALIGN() overflow. The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
CVSS is 8.8. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
| Product | Affected versions | Fixed versions |
|---|---|---|
| cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* | Not reported | Not reported |
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=51fe6141f0f64ae0bbc096a41a07572273e8c0ef <d19b817540c0abe84854a64ee9ee34cecc3bbeef || >=51fe6141f0f64ae0bbc096a41a07572273e8c0ef <ebb6021560b94649bec6b8faba6fe0dca2218e81 || >=51fe6141f0f64ae0bbc096a41a07572273e8c0ef <e42a046bb41dcdde4f766a17d8211842007ed537 || >=51fe6141f0f64ae0bbc096a41a07572273e8c0ef <79fad1917802c28de51a479318a056a6fbe3e2f2 || >=51fe6141f0f64ae0bbc096a41a07572273e8c0ef <b42497e3c0e74db061eafad41c0cd7243c46436b | d19b817540c0abe84854a64ee9ee34cecc3bbeef, ebb6021560b94649bec6b8faba6fe0dca2218e81, e42a046bb41dcdde4f766a17d8211842007ed537, 79fad1917802c28de51a479318a056a6fbe3e2f2, b42497e3c0e74db061eafad41c0cd7243c46436b |
| Linux/Linuxgeneric | 6.2 | Not reported |
Published upstream
Sep 4, 2025
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Oct 19, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Aug 5, 2026
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.
Quoted source text, attributed separately from HOL analysis.