GHSA-6gx3-fvx8-mx4pMediumCVSS 5.5
In the Linux kernel, the following vulnerability has been resolved: iommufd: Set veventq_depth...
🔗 CVE IDs covered (1)
📋 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).
🔗 References (5)
- https://nvd.nist.gov/vuln/detail/CVE-2026-64291
- https://git.kernel.org/stable/c/6ebf2eb46fbd5b40393ff8fbb847ba96925beaff
- https://git.kernel.org/stable/c/e7b5e55652746b1221b9c10ff80eae8a154101ba
- https://git.kernel.org/stable/c/f565297edf316016be4a1a9e2eb9f39359313f43
- https://github.com/advisories/GHSA-6gx3-fvx8-mx4p