Description (CNA)
In the Linux kernel, the following vulnerability has been resolved: iommufd: Set veventq_depth upper bound iommufd_veventq_alloc() accepts any !0 veventq_depth from userspace, with an upper bound at U32_MAX. 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).
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected e36ba5ab808ef6237c3148d469c8238674230e2b before f565297edf316016be4a1a9e2eb9f39359313f43; affected e36ba5ab808ef6237c3148d469c8238674230e2b before e7b5e55652746b1221b9c10ff80eae8a154101ba; affected e36ba5ab808ef6237c3148d469c8238674230e2b before 6ebf2eb46fbd5b40393ff8fbb847ba96925beaff |
| Linux / Linux | affected 6.15; unaffected 0 before 6.15; unaffected 6.18.39 through 6.18.*; unaffected 7.1.4 through 7.1.*; unaffected 7.2 through * |
CWE
No CWE identifiers supplied.