This page tracks the Debian fix status. The vulnerability itself is described on the main CVE page. View CVE-2026-64291 →

DEBIAN-CVE-2026-64291

In the Linux kernel, the following vulnerability has been resolved: iommufd: Set veventq_depth upper bound iommufd_veventq_alloc() accepts any !0 ve...

Original description

The description as published by the source.

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: OSV.dev (Open Source Vulnerabilities) OSV

Affected packages

Debian:14 linux

[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"7.1.4-1"}]}]

References

advisory security-tracker.debian.org