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CVE-2025-38216 (GCVE-0-2025-38216)

Vulnerability from cvelistv5 – Published: 2025-07-04 13:37 – Updated: 2026-08-05 12:00
VLAI
Title
iommu/vt-d: Restore context entry setup order for aliased devices
Summary
In the Linux kernel, the following vulnerability has been resolved: iommu/vt-d: Restore context entry setup order for aliased devices Commit 2031c469f816 ("iommu/vt-d: Add support for static identity domain") changed the context entry setup during domain attachment from a set-and-check policy to a clear-and-reset approach. This inadvertently introduced a regression affecting PCI aliased devices behind PCIe-to-PCI bridges. Specifically, keyboard and touchpad stopped working on several Apple Macbooks with below messages: kernel: platform pxa2xx-spi.3: Adding to iommu group 20 kernel: input: Apple SPI Keyboard as /devices/pci0000:00/0000:00:1e.3/pxa2xx-spi.3/spi_master/spi2/spi-APP000D:00/input/input0 kernel: DMAR: DRHD: handling fault status reg 3 kernel: DMAR: [DMA Read NO_PASID] Request device [00:1e.3] fault addr 0xffffa000 [fault reason 0x06] PTE Read access is not set kernel: DMAR: DRHD: handling fault status reg 3 kernel: DMAR: [DMA Read NO_PASID] Request device [00:1e.3] fault addr 0xffffa000 [fault reason 0x06] PTE Read access is not set kernel: applespi spi-APP000D:00: Error writing to device: 01 0e 00 00 kernel: DMAR: DRHD: handling fault status reg 3 kernel: DMAR: [DMA Read NO_PASID] Request device [00:1e.3] fault addr 0xffffa000 [fault reason 0x06] PTE Read access is not set kernel: DMAR: DRHD: handling fault status reg 3 kernel: applespi spi-APP000D:00: Error writing to device: 01 0e 00 00 Fix this by restoring the previous context setup order.
Severity
8.8 (High)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: 2031c469f8161abe74189cb74f50da224f340b71 , < fb5873b779dd5858123c19bbd6959566771e2e83 (git)
Affected: 2031c469f8161abe74189cb74f50da224f340b71 , < d43c81b691813e16a2d08208ce8947aebdab83cd (git)
Affected: 2031c469f8161abe74189cb74f50da224f340b71 , < 320302baed05c6456164652541f23d2a96522c06 (git)
guessed Create a notification for this product.
Linux Linux Affected: 6.12
Unaffected: 0 , < 6.12 (semver)
Unaffected: 6.12.35 , ≤ 6.12.* (semver)
Unaffected: 6.15.4 , ≤ 6.15.* (semver)
Unaffected: 6.16 , ≤ * (original_commit_for_fix)
guessed Create a notification for this product.
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          "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."
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              "value": "AV:L - The faulty ordering is reached through local operations that attach or detach IOMMU domains \u2014 driver bind/unbind, device hotplug/probe, or VFIO/iommufd device assignment ioctls \u2014 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\u0027s 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\u0027s context entry gets reprogrammed by an unrelated host attach.\nUI:N - No victim action is needed \u2014 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\u0027s 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\u0027s second-level page tables \u2014 or with pass-through translation \u2014 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\u0027s or the host\u0027s 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\u0027s 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."
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    "dateReserved": "2025-04-16T04:51:23.995Z",
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    "nvd": "{\"cve\":{\"id\":\"CVE-2025-38216\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2025-07-04T14:15:30.103\",\"lastModified\":\"2026-07-30T06:23:00.813\",\"vulnStatus\":\"Modified\",\"cveTags\":[],\"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.\"},{\"lang\":\"es\",\"value\":\"En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: iommu/vt-d: Restaurar el orden de configuraci\u00f3n de la entrada de contexto para dispositivos con alias. El commit 2031c469f816 (\\\"iommu/vt-d: A\u00f1adir compatibilidad con dominio de identidad est\u00e1tica\\\") cambi\u00f3 la configuraci\u00f3n de la entrada de contexto durante la conexi\u00f3n del dominio, de una pol\u00edtica de \\\"establecer y comprobar\\\" a una de \\\"borrar y restablecer\\\". Esto introdujo inadvertidamente una regresi\u00f3n que afectaba a los dispositivos con alias PCI tras puentes PCIe a PCI. Espec\u00edficamente, el teclado y el panel t\u00e1ctil dejaron de funcionar en varias Apple Macbooks con los siguientes mensajes: kernel: platform pxa2xx-spi.3: Adding to iommu group 20 kernel: input: Apple SPI Keyboard as /devices/pci0000:00/0000:00:1e.3/pxa2xx-spi.3/spi_master/spi2/spi-APP000D:00/input/input0 kernel: DMAR: DRHD: handling fault status reg 3 kernel: DMAR: [DMA Read NO_PASID] Request device [00:1e.3] fault addr 0xffffa000 [fault reason 0x06] PTE Read access is not set kernel: DMAR: DRHD: handling fault status reg 3 kernel: DMAR: [DMA Read NO_PASID] Request device [00:1e.3] fault addr 0xffffa000 [fault reason 0x06] PTE Read access is not set kernel: applespi spi-APP000D:00: Error writing to device: 01 0e 00 00 kernel: DMAR: DRHD: handling fault status reg 3 kernel: DMAR: [DMA Read NO_PASID] Request device [00:1e.3] fault addr 0xffffa000 [fault reason 0x06] PTE Read access is not set kernel: DMAR: DRHD: handling fault status reg 3 kernel: applespi spi-APP000D:00: Error writing to device: 01 0e 00 00 Solucione esto restaurando el orden de configuraci\u00f3n del contexto anterior.\"}],\"affected\":[{\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"affectedData\":[{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"unaffected\",\"programFiles\":[\"drivers/iommu/intel/iommu.c\",\"drivers/iommu/intel/iommu.h\",\"drivers/iommu/intel/nested.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"2031c469f8161abe74189cb74f50da224f340b71\",\"lessThan\":\"fb5873b779dd5858123c19bbd6959566771e2e83\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"2031c469f8161abe74189cb74f50da224f340b71\",\"lessThan\":\"d43c81b691813e16a2d08208ce8947aebdab83cd\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"2031c469f8161abe74189cb74f50da224f340b71\",\"lessThan\":\"320302baed05c6456164652541f23d2a96522c06\",\"versionType\":\"git\",\"status\":\"affected\"}]},{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"affected\",\"programFiles\":[\"drivers/iommu/intel/iommu.c\",\"drivers/iommu/intel/iommu.h\",\"drivers/iommu/intel/nested.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"6.12\",\"status\":\"affected\"},{\"version\":\"0\",\"lessThan\":\"6.12\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.12.35\",\"lessThanOrEqual\":\"6.12.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.15.4\",\"lessThanOrEqual\":\"6.15.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.16\",\"lessThanOrEqual\":\"*\",\"versionType\":\"original_commit_for_fix\",\"status\":\"unaffected\"}]}]}],\"metrics\":{\"cvssMetricV31\":[{\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"type\":\"Secondary\",\"cvssData\":{\"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\",\"attackVector\":\"LOCAL\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"LOW\",\"userInteraction\":\"NONE\",\"scope\":\"CHANGED\",\"confidentialityImpact\":\"HIGH\",\"integrityImpact\":\"HIGH\",\"availabilityImpact\":\"HIGH\"},\"exploitabilityScore\":2.0,\"impactScore\":6.0},{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H\",\"baseScore\":7.8,\"baseSeverity\":\"HIGH\",\"attackVector\":\"LOCAL\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"LOW\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"HIGH\",\"integrityImpact\":\"HIGH\",\"availabilityImpact\":\"HIGH\"},\"exploitabilityScore\":1.8,\"impactScore\":5.9}]},\"weaknesses\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"description\":[{\"lang\":\"en\",\"value\":\"NVD-CWE-noinfo\"}]}],\"configurations\":[{\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"6.12\",\"versionEndExcluding\":\"6.12.35\",\"matchCriteriaId\":\"B9A5A6B0-4B32-4F26-8142-EF867203ADBB\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"6.13\",\"versionEndExcluding\":\"6.15.4\",\"matchCriteriaId\":\"DFD174C5-1AA2-4671-BDDC-1A9FCC753655\"}]}]}],\"references\":[{\"url\":\"https://git.kernel.org/stable/c/320302baed05c6456164652541f23d2a96522c06\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/d43c81b691813e16a2d08208ce8947aebdab83cd\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/fb5873b779dd5858123c19bbd6959566771e2e83\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]}]}}",
    "redhat_vex": {
      "aggregate_severity": "Moderate",
      "current_release_date": "2026-07-30T09:09:21+00:00",
      "cve": "CVE-2025-38216",
      "id": "CVE-2025-38216",
      "initial_release_date": "2025-07-04T00:00:00+00:00",
      "product_status:known_affected": "184",
      "product_status:known_not_affected": "90",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: iommu/vt-d: Restore context entry setup order for aliased devices",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2025/cve-2025-38216.json",
      "version": "3"
    },
    "suse_vex": {
      "aggregate_severity": "moderate",
      "current_release_date": "2026-09-02T01:16:48Z",
      "cve": "CVE-2025-38216",
      "id": "CVE-2025-38216",
      "initial_release_date": "2025-07-04T23:21:59Z",
      "product_status:first_fixed": "2",
      "product_status:known_affected": "399",
      "product_status:known_not_affected": "460",
      "product_status:recommended": "314",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2025-38216",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2025-38216.json",
      "version": "44"
    }
  }
}



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  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
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  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


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