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).
CVSS Details
- CVSS 3.1 Base Score: 5.5
- CVSS 3.1 Vector: (CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H)
Covered by Rapid7
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Amazon_linux_2023 | — | Upgrade kernel-livepatch-6.18.39-79.141Upgrade microvm-kernel6.18Upgrade kernel6.18-tools-develUpgrade kernel6.18-toolsUpgrade kernel6.18Upgrade kernel6.18-modules-extra-commonUpgrade perf6.18-debuginfoUpgrade kernel6.18-headersUpgrade kernel6.18-modules-extraUpgrade kernel6.18-debuginfoUpgrade bpftool6.18-debuginfoUpgrade kernel6.18-debuginfo-common-x86_64Upgrade kernel6.18-debuginfo-common-aarch64Upgrade python3-perf6.18Upgrade python3-perf6.18-debuginfoUpgrade perf6.18Upgrade bpftool6.18Upgrade kernel6.18-develUpgrade kernel6.18-tools-debuginfo | Aug 18, 2026 | Jul 25, 2026 |
| Redhat_linux | — | No solution exists | Jul 31, 2026 | Jul 25, 2026 |
Prioritise with Active Threat Intelligence
With curated Threat Intelligence, you can see which vulnerabilities truly put you at risk, prioritize what matters most, and act before attackers do.
Explore Intelligence Hub