CVE-2026-64291 | BDVDB-2026-352425 Detail

Description#

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).

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Exploit#

History#

1. Version 12026-07-25Record published in the CVE List.
2. Version 22026-11-06Most recent update recorded in the CVE List.