CVE-2026-64291

CVE CVE-2026-64291EUVD EUVD-2026-49003Published 2026-07-25T08:49:30.000Z

What the advisory describes

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).

Source: EUVD (ENISA), in the words of the advisory.

Products the advisory names

These come from the advisory itself, not from any check we performed.

Linux — Linux e36ba5ab808ef6237c3148d469c8238674230e2b <e7b5e55652746b1221b9c10ff80eae8a154101ba; 6.15; patch: 7.1.4; e36ba5ab808ef6237c3148d469c8238674230e2b <f565297edf316016be4a1a9e2eb9f39359313f43; patch: 7.2-rc1; patch: 6.18.39; patch: 0; e36ba5ab808ef6237c3148d469c8238674230e2b <6ebf2eb46fbd5b40393ff8fbb847ba96925beaff

The versions shown are the advisory's own. Patchlage compares no version numbers and derives no judgement from them — which version is installed is something a person has to look up.

Carried in the product catalogue

An estate covering these products can be recorded in Patchlage. An advisory about them appears in the next morning's situation report.

Linux — Linux

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