{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2024-50101", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2024-10-21T19:36:19.946Z", "datePublished": "2024-11-05T17:07:38.695Z", "dateUpdated": "2026-08-05T11:41:41.330Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-05T11:41:41.330Z" }, "descriptions": [ { "lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\niommu/vt-d: Fix incorrect pci_for_each_dma_alias() for non-PCI devices\n\nPreviously, the domain_context_clear() function incorrectly called\npci_for_each_dma_alias() to set up context entries for non-PCI devices.\nThis could lead to kernel hangs or other unexpected behavior.\n\nAdd a check to only call pci_for_each_dma_alias() for PCI devices. For\nnon-PCI devices, domain_context_clear_one() is called directly." } ], "metrics": [ { "cvssV3_1": { "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" }, "scenarios": [ { "lang": "en", "value": "AV:L - The vulnerable path is reached only through local IOMMU domain attach/detach operations (device probe/removal, driver bind/unbind, iommu_group type change, VFIO/iommufd device attach); there is no network or remote-peer input involved.\nAC:L - The type confusion is deterministic — every attach/detach of a non-PCI (ACPI-namespace/platform) device on an Intel VT-d IOMMU takes the bogus `to_pci_dev()` branch, with no race to win and no memory-layout condition to satisfy. CONFIG_INTEL_IOMMU is default-on in distro x86_64 kernels and ANDD/ACPI-namespace devices in DMAR scope are common on Intel client platforms, as the two independent bugzilla reports show.\nPR:L - Reaching the domain attach/detach path requires local access to device-management interfaces rather than any remote authentication, consistent with the PR:L scoring used for comparable VT-d attach/detach defects (CVE-2024-56668, CVE-2024-56669). No credential verification protects the code itself once the attach/detach operation is issued.\nUI:N - The faulty branch executes automatically as part of IOMMU domain attach/detach and device probe/release; no victim action such as opening a file or mounting a filesystem is needed.\nS:U - The corruption is confined to the kernel's own IOMMU bookkeeping and heap. Clearing a context entry sets Present=0, which blocks DMA (fail-closed) rather than granting a device unrestricted access, so no IOMMU/DMA security boundary is crossed.\nC:H - The fabricated `struct pci_dev` causes unbounded out-of-bounds reads of kernel heap memory adjacent to the platform device, which are then chased as pointers (`pdev->bus->number`, `bus->self`, `bus->parent`, `tmp->subordinate->number`), giving an unconstrained kernel-memory read primitive rather than a few bounded bytes.\nI:H - This is a type confusion in which out-of-bounds-read garbage selects which IOMMU context entries get zeroed, silently tearing down DMA translation for unrelated devices and corrupting in-flight DMA for them; per type-confusion/memory-corruption guidance this warrants High.\nA:H - The upstream commit states the bug \"could lead to kernel hangs,\" and the code confirms both an unterminated walk of a fabricated `pci_bus` parent chain (hang) and wild pointer dereferences (oops) on affected hardware, in some configurations during boot-time device probe." } ] } ], "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" ], "versions": [ { "version": "9807860f6ad446459d0446550cf4a2dc23bbee6c", "lessThan": "0bd9a30c22afb5da203386b811ec31429d2caa78", "status": "affected", "versionType": "git" }, { "version": "59862b869275c27beb25cda2054b59a8b5d04970", "lessThan": "cbfa3a83eba05240ce37839ed48280a05e8e8f6c", "status": "affected", "versionType": "git" }, { "version": "48f2183a4f9d3540fc5cfc8f8451621ee92c09f8", "lessThan": "fe2e0b6cd00abea3efac66de1da22d844364c1b0", "status": "affected", "versionType": "git" }, { "version": "9a16ab9d640274b20813d2d17475e18d3e99d834", "lessThan": "04d6826ba7ba81213422276e96c90c6565169e1c", "status": "affected", "versionType": "git" }, { "version": "9a16ab9d640274b20813d2d17475e18d3e99d834", "lessThan": "6e02a277f1db24fa039e23783c8921c7b0e5b1b3", "status": "affected", "versionType": "git" }, { "version": "5.15.142", "lessThan": "5.15.169", "status": "affected", "versionType": "semver" }, { "version": "6.1.66", "lessThan": "6.1.114", "status": "affected", "versionType": "semver" }, { "version": "6.6.5", "lessThan": "6.6.58", "status": "affected", "versionType": "semver" } ] }, { "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" ], "versions": [ { "version": "6.7", "status": "affected" }, { "version": "0", "lessThan": "6.7", "status": "unaffected", "versionType": "semver" }, { "version": "5.15.169", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.1.114", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.6.58", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.11.5", "lessThanOrEqual": "6.11.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.12", "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": "5.15.142", "versionEndExcluding": "5.15.169" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.1.66", "versionEndExcluding": "6.1.114" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.6.5", "versionEndExcluding": "6.6.58" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.7", "versionEndExcluding": "6.11.5" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.7", "versionEndExcluding": "6.12" } ] } ] } ], "references": [ { "url": "https://git.kernel.org/stable/c/0bd9a30c22afb5da203386b811ec31429d2caa78" }, { "url": "https://git.kernel.org/stable/c/cbfa3a83eba05240ce37839ed48280a05e8e8f6c" }, { "url": "https://git.kernel.org/stable/c/fe2e0b6cd00abea3efac66de1da22d844364c1b0" }, { "url": "https://git.kernel.org/stable/c/04d6826ba7ba81213422276e96c90c6565169e1c" }, { "url": "https://git.kernel.org/stable/c/6e02a277f1db24fa039e23783c8921c7b0e5b1b3" } ], "title": "iommu/vt-d: Fix incorrect pci_for_each_dma_alias() for non-PCI devices", "x_generator": { "engine": "bippy-1.2.0" } }, "adp": [ { "metrics": [ { "cvssV3_1": { "scope": "UNCHANGED", "version": "3.1", "baseScore": 5.5, "attackVector": "LOCAL", "baseSeverity": "MEDIUM", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "integrityImpact": "NONE", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "LOW", "confidentialityImpact": "NONE" } }, { "other": { "type": "ssvc", "content": { "id": "CVE-2024-50101", "role": "CISA Coordinator", "options": [ { "Exploitation": "none" }, { "Automatable": "no" }, { "Technical Impact": "partial" } ], "version": "2.0.3", "timestamp": "2025-10-01T20:22:32.500340Z" } } } ], "problemTypes": [ { "descriptions": [ { "lang": "en", "type": "CWE", "description": "CWE-noinfo Not enough information" } ] } ], "title": "CISA ADP Vulnrichment", "providerMetadata": { "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2025-10-01T20:27:18.620Z" } }, { "title": "CVE Program Container", "references": [ { "url": "https://lists.debian.org/debian-lts-announce/2025/01/msg00001.html" } ], "providerMetadata": { "orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE", "dateUpdated": "2025-11-03T22:25:32.555Z" } } ] } }