In the Linux kernel, the following vulnerability has been resolved:
iommu/amd: Improve page fault error reporting
If IOMMU domain for device group is not setup properly then we may hit IOMMU page fault. Current page fault handler assumes that domain is always setup and it will hit NULL pointer derefence (see below sample log).
Lets check whether domain is setup or not and log appropriate message.
Sample log: ---------- amdgpu 0000:00:01.0: amdgpu: SE 1, SH per SE 1, CU per SH 8, active_cu_number 6 BUG: kernel NULL pointer dereference, address: 0000000000000058 #PF: supervisor read access in kernel mode #PF: error_code(0x0000) - not-present page PGD 0 P4D 0 Oops: 0000 [#1] PREEMPT SMP NOPTI CPU: 2 PID: 56 Comm: irq/24-AMD-Vi Not tainted 6.2.0-rc2+ #89 Hardware name: xxx RIP: 0010:report_iommu_fault+0x11/0x90 [...] Call Trace: <TASK> amd_iommu_int_thread+0x60c/0x760 ? __pfx_irq_thread_fn+0x10/0x10 irq_thread_fn+0x1f/0x60 irq_thread+0xea/0x1a0 ? preempt_count_add+0x6a/0xa0 ? __pfx_irq_thread_dtor+0x10/0x10 ? __pfx_irq_thread+0x10/0x10 kthread+0xe9/0x110 ? __pfx_kthread+0x10/0x10 ret_from_fork+0x2c/0x50 </TASK>
[joro: Edit commit message]
Covered by Rapid7
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Amazon_linux_2023 | — | Upgrade bpftoolUpgrade kernel-libbpf-staticUpgrade kernel-toolsUpgrade bpftool-debuginfoUpgrade kernel-livepatch-6.1.19-30.43Upgrade kernel-debuginfo-common-aarch64Upgrade perfUpgrade kernel-tools-develUpgrade kernel-develUpgrade python3-perfUpgrade python3-perf-debuginfoUpgrade kernel-headersUpgrade kernelUpgrade perf-debuginfoUpgrade kernel-libbpf-develUpgrade kernel-debuginfo-common-x86_64Upgrade kernel-libbpfUpgrade kernel-debuginfoUpgrade kernel-tools-debuginfo | Jan 12, 2026 | Dec 9, 2025 |
| Debian | — | Upgrade linux | Dec 10, 2025 | Dec 10, 2025 |
| Redhat_linux | — | No solution exists | Jul 17, 2026 | Dec 9, 2025 |
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