{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2025-38216", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2025-04-16T04:51:23.995Z", "datePublished": "2025-07-04T13:37:33.906Z", "dateUpdated": "2026-08-05T12:00:25.669Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-05T12:00:25.669Z" }, "descriptions": [ { "lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\niommu/vt-d: Restore context entry setup order for aliased devices\n\nCommit 2031c469f816 (\"iommu/vt-d: Add support for static identity domain\")\nchanged the context entry setup during domain attachment from a\nset-and-check policy to a clear-and-reset approach. This inadvertently\nintroduced a regression affecting PCI aliased devices behind PCIe-to-PCI\nbridges.\n\nSpecifically, keyboard and touchpad stopped working on several Apple\nMacbooks with below messages:\n\n kernel: platform pxa2xx-spi.3: Adding to iommu group 20\n kernel: input: Apple SPI Keyboard as\n /devices/pci0000:00/0000:00:1e.3/pxa2xx-spi.3/spi_master/spi2/spi-APP000D:00/input/input0\n kernel: DMAR: DRHD: handling fault status reg 3\n kernel: DMAR: [DMA Read NO_PASID] Request device [00:1e.3] fault addr\n 0xffffa000 [fault reason 0x06] PTE Read access is not set\n kernel: DMAR: DRHD: handling fault status reg 3\n kernel: DMAR: [DMA Read NO_PASID] Request device [00:1e.3] fault addr\n 0xffffa000 [fault reason 0x06] PTE Read access is not set\n kernel: applespi spi-APP000D:00: Error writing to device: 01 0e 00 00\n kernel: DMAR: DRHD: handling fault status reg 3\n kernel: DMAR: [DMA Read NO_PASID] Request device [00:1e.3] fault addr\n 0xffffa000 [fault reason 0x06] PTE Read access is not set\n kernel: DMAR: DRHD: handling fault status reg 3\n kernel: applespi spi-APP000D:00: Error writing to device: 01 0e 00 00\n\nFix this by restoring the previous context setup order." } ], "metrics": [ { "cvssV3_1": { "version": "3.1", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H", "baseScore": 8.8, "baseSeverity": "HIGH" }, "scenarios": [ { "lang": "en", "value": "AV:L - The faulty ordering is reached through local operations that attach or detach IOMMU domains — driver bind/unbind, device hotplug/probe, or VFIO/iommufd device assignment ioctls — not through any network-facing path.\nAC:L - On any platform with DMA-aliased devices (PCIe-to-PCI bridge children, or ACPI-scoped non-PCI devices sharing a parent's source-ID, which land in a separate IOMMU group via generic_device_group()), the clobber is deterministic and repeatable by simply triggering an attach on the sibling device; no race or unpredictable memory layout is involved.\nPR:L - Driving a domain attach requires only low-privileged local access to the device/VFIO interfaces, and in the device-assignment case the beneficiary is an unprivileged guest whose assigned device's context entry gets reprogrammed by an unrelated host attach.\nUI:N - No victim action is needed — the mis-ordered clear-and-reset happens automatically during normal device probe and default-domain attachment.\nS:C - This breaks the IOMMU/DMA isolation boundary itself: a shared context entry ends up programmed with another domain's page tables or with CONTEXT_TT_PASS_THROUGH, so DMA from one security domain reaches memory belonging to a different one (host memory from a guest-assigned device).\nC:H - A device left with the wrong domain's second-level page tables — or with pass-through translation — can DMA-read memory it was never granted, up to all host physical memory in the passthrough case.\nI:H - The same wrong or pass-through context entry grants DMA writes into another domain's or the host's physical memory, which is a direct arbitrary-write primitive usable for control-flow hijack; a stale entry can also point at a torn-down domain's page tables.\nA:H - The demonstrated effect is a DMAR fault storm and permanently dead devices (keyboard and touchpad stop working, \"DRHD: handling fault status reg 3\" flooding), and DMA through freed or wrong page tables can corrupt kernel memory and panic the system." } ] } ], "affected": [ { "product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "drivers/iommu/intel/iommu.c", "drivers/iommu/intel/iommu.h", "drivers/iommu/intel/nested.c" ], "versions": [ { "version": "2031c469f8161abe74189cb74f50da224f340b71", "lessThan": "fb5873b779dd5858123c19bbd6959566771e2e83", "status": "affected", "versionType": "git" }, { "version": "2031c469f8161abe74189cb74f50da224f340b71", "lessThan": "d43c81b691813e16a2d08208ce8947aebdab83cd", "status": "affected", "versionType": "git" }, { "version": "2031c469f8161abe74189cb74f50da224f340b71", "lessThan": "320302baed05c6456164652541f23d2a96522c06", "status": "affected", "versionType": "git" } ] }, { "product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "drivers/iommu/intel/iommu.c", "drivers/iommu/intel/iommu.h", "drivers/iommu/intel/nested.c" ], "versions": [ { "version": "6.12", "status": "affected" }, { "version": "0", "lessThan": "6.12", "status": "unaffected", "versionType": "semver" }, { "version": "6.12.35", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.15.4", "lessThanOrEqual": "6.15.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.16", "lessThanOrEqual": "*", "status": "unaffected", "versionType": "original_commit_for_fix" } ] } ], "cpeApplicability": [ { "nodes": [ { "operator": "OR", "negate": false, "cpeMatch": [ { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.12", "versionEndExcluding": "6.12.35" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.12", "versionEndExcluding": "6.15.4" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.12", "versionEndExcluding": "6.16" } ] } ] } ], "references": [ { "url": "https://git.kernel.org/stable/c/fb5873b779dd5858123c19bbd6959566771e2e83" }, { "url": "https://git.kernel.org/stable/c/d43c81b691813e16a2d08208ce8947aebdab83cd" }, { "url": "https://git.kernel.org/stable/c/320302baed05c6456164652541f23d2a96522c06" } ], "title": "iommu/vt-d: Restore context entry setup order for aliased devices", "x_generator": { "engine": "bippy-1.2.0" } } } }