CVE-2025-38688iommufd: Prevent ALIGN() overflow
- 8.8HighCVSS base score
- 0.18%Exploitation in 30 daysEPSS · top 93% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- NonePublic exploitsnone known yet
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.
Timeline
ID reserved
By Linux
- 5 months later
· 5 months later
Published
- 14 months later
· 14 months later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| LinuxCNA (assigner) | 3.1 | High8.8 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H |
| NVDNVD · Modified | 3.1 | High7.8 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
- EPSS (exploitation in 30 days)
- 0.18% · top 93% of all CVEs (13 Nov 2026)
- CISA SSVC
- Exploitation: none · Automatable: no · Technical impact: total
The list uses the assigner's score when there is one, then CISA's, then NVD's: High 8.8.
Affected products
- affected 51fe6141f0f64ae0bbc096a41a07572273e8c0ef – < d19b817540c0abe84854a64ee9ee34cecc3bbeef
- affected 51fe6141f0f64ae0bbc096a41a07572273e8c0ef – < ebb6021560b94649bec6b8faba6fe0dca2218e81
- affected 51fe6141f0f64ae0bbc096a41a07572273e8c0ef – < e42a046bb41dcdde4f766a17d8211842007ed537
- affected 51fe6141f0f64ae0bbc096a41a07572273e8c0ef – < 79fad1917802c28de51a479318a056a6fbe3e2f2
- affected 51fe6141f0f64ae0bbc096a41a07572273e8c0ef – < b42497e3c0e74db061eafad41c0cd7243c46436b
- affected 6.2
- unaffected < 6.2
- unaffected 6.6.103 – ≤ 6.6.*
- unaffected 6.12.43 – ≤ 6.12.*
- unaffected 6.15.11 – ≤ 6.15.*
- unaffected 6.16.2 – ≤ 6.16.*
- unaffected 6.17 – ≤ *
References
References5
- https://git.kernel.org/stable/c/d19b817540c0abe84854a64ee9ee34cecc3bbeef (opens in a new tab)
- https://git.kernel.org/stable/c/ebb6021560b94649bec6b8faba6fe0dca2218e81 (opens in a new tab)
- https://git.kernel.org/stable/c/e42a046bb41dcdde4f766a17d8211842007ed537 (opens in a new tab)
- https://git.kernel.org/stable/c/79fad1917802c28de51a479318a056a6fbe3e2f2 (opens in a new tab)
- https://git.kernel.org/stable/c/b42497e3c0e74db061eafad41c0cd7243c46436b (opens in a new tab)
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- EUVD EUVD-2025-26781 (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://cveledger.app/cve/CVE-2025-38688)Record last updated .