CVE-2026-64291
- Source
- https://cve.org/CVERecord?id=CVE-2026-64291
- Import Source
- https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-64291.json
- JSON Data
- https://api.osv.dev/v1/vulns/CVE-2026-64291
- Downstream
- Related
- Published
- 2026-07-25T08:49:30.686Z
- Modified
- 2026-08-18T03:31:01.732885553Z
- Summary
- iommufd: Set veventq_depth upper bound
- Details
-
In the Linux kernel, the following vulnerability has been resolved:
iommufd: Set veventq_depth upper bound
iommufdveventqalloc() accepts any !0 veventqdepth from userspace, with an upper bound at U32MAX.
This leaves a vulnerability where userspace can allocate excessively large queues to exhaust kernel memory reserves.
Cap the veventq_depth (maximum number of entries) to 1 << 19, matching the maximum number of entries in the SMMUv3 EVTQ (the largest use case today).
- Database specific
{ "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/64xxx/CVE-2026-64291.json", "cna_assigner": "Linux" }- References
-
- https://git.kernel.org/stable/c/6ebf2eb46fbd5b40393ff8fbb847ba96925beaff
- https://git.kernel.org/stable/c/e7b5e55652746b1221b9c10ff80eae8a154101ba
- https://git.kernel.org/stable/c/f565297edf316016be4a1a9e2eb9f39359313f43
- https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/64xxx/CVE-2026-64291.json
- https://nvd.nist.gov/vuln/detail/CVE-2026-64291
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git