cve-2024-56669
Vulnerability from cvelistv5
Published
2024-12-27 15:06
Modified
2025-02-11 15:45
Severity ?
7.8 (High) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
EPSS score ?
0.02% (0.02684)
Summary
In the Linux kernel, the following vulnerability has been resolved: iommu/vt-d: Remove cache tags before disabling ATS The current implementation removes cache tags after disabling ATS, leading to potential memory leaks and kernel crashes. Specifically, CACHE_TAG_DEVTLB type cache tags may still remain in the list even after the domain is freed, causing a use-after-free condition. This issue really shows up when multiple VFs from different PFs passed through to a single user-space process via vfio-pci. In such cases, the kernel may crash with kernel messages like: BUG: kernel NULL pointer dereference, address: 0000000000000014 PGD 19036a067 P4D 1940a3067 PUD 136c9b067 PMD 0 Oops: Oops: 0000 [#1] PREEMPT SMP NOPTI CPU: 74 UID: 0 PID: 3183 Comm: testCli Not tainted 6.11.9 #2 RIP: 0010:cache_tag_flush_range+0x9b/0x250 Call Trace: <TASK> ? __die+0x1f/0x60 ? page_fault_oops+0x163/0x590 ? exc_page_fault+0x72/0x190 ? asm_exc_page_fault+0x22/0x30 ? cache_tag_flush_range+0x9b/0x250 ? cache_tag_flush_range+0x5d/0x250 intel_iommu_tlb_sync+0x29/0x40 intel_iommu_unmap_pages+0xfe/0x160 __iommu_unmap+0xd8/0x1a0 vfio_unmap_unpin+0x182/0x340 [vfio_iommu_type1] vfio_remove_dma+0x2a/0xb0 [vfio_iommu_type1] vfio_iommu_type1_ioctl+0xafa/0x18e0 [vfio_iommu_type1] Move cache_tag_unassign_domain() before iommu_disable_pci_caps() to fix it.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/1f2557e08a617a4b5e92a48a1a9a6f86621def18Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/9a0a72d3ed919ebe6491f527630998be053151d8Patch
Impacted products
Vendor Product Version
Linux Linux Version: 3b1d9e2b2d6856eabf5faa12d20c97fef657999f
Version: 3b1d9e2b2d6856eabf5faa12d20c97fef657999f
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   Linux Linux Version: 6.10
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{
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                     attackVector: "LOCAL",
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                     scope: "UNCHANGED",
                     userInteraction: "NONE",
                     vectorString: "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
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                        timestamp: "2025-02-11T15:41:33.499113Z",
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            dateUpdated: "2025-01-20T06:25:30.869Z",
            orgId: "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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               url: "https://git.kernel.org/stable/c/1f2557e08a617a4b5e92a48a1a9a6f86621def18",
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         title: "iommu/vt-d: Remove cache tags before disabling ATS",
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   cveMetadata: {
      assignerOrgId: "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      assignerShortName: "Linux",
      cveId: "CVE-2024-56669",
      datePublished: "2024-12-27T15:06:30.792Z",
      dateReserved: "2024-12-27T15:00:39.844Z",
      dateUpdated: "2025-02-11T15:45:21.237Z",
      state: "PUBLISHED",
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      nvd: "{\"cve\":{\"id\":\"CVE-2024-56669\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2024-12-27T15:15:26.797\",\"lastModified\":\"2025-02-11T16:15:47.333\",\"vulnStatus\":\"Modified\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\niommu/vt-d: Remove cache tags before disabling ATS\\n\\nThe current implementation removes cache tags after disabling ATS,\\nleading to potential memory leaks and kernel crashes. Specifically,\\nCACHE_TAG_DEVTLB type cache tags may still remain in the list even\\nafter the domain is freed, causing a use-after-free condition.\\n\\nThis issue really shows up when multiple VFs from different PFs\\npassed through to a single user-space process via vfio-pci. In such\\ncases, the kernel may crash with kernel messages like:\\n\\n BUG: kernel NULL pointer dereference, address: 0000000000000014\\n PGD 19036a067 P4D 1940a3067 PUD 136c9b067 PMD 0\\n Oops: Oops: 0000 [#1] PREEMPT SMP NOPTI\\n CPU: 74 UID: 0 PID: 3183 Comm: testCli Not tainted 6.11.9 #2\\n RIP: 0010:cache_tag_flush_range+0x9b/0x250\\n Call Trace:\\n  <TASK>\\n  ? __die+0x1f/0x60\\n  ? page_fault_oops+0x163/0x590\\n  ? exc_page_fault+0x72/0x190\\n  ? asm_exc_page_fault+0x22/0x30\\n  ? cache_tag_flush_range+0x9b/0x250\\n  ? cache_tag_flush_range+0x5d/0x250\\n  intel_iommu_tlb_sync+0x29/0x40\\n  intel_iommu_unmap_pages+0xfe/0x160\\n  __iommu_unmap+0xd8/0x1a0\\n  vfio_unmap_unpin+0x182/0x340 [vfio_iommu_type1]\\n  vfio_remove_dma+0x2a/0xb0 [vfio_iommu_type1]\\n  vfio_iommu_type1_ioctl+0xafa/0x18e0 [vfio_iommu_type1]\\n\\nMove cache_tag_unassign_domain() before iommu_disable_pci_caps() to fix\\nit.\"},{\"lang\":\"es\",\"value\":\"En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: iommu/vt-d: eliminar etiquetas de caché antes de deshabilitar ATS La implementación actual elimina las etiquetas de caché después de deshabilitar ATS, lo que genera posibles fugas de memoria y fallas del kernel. Específicamente, las etiquetas de caché de tipo CACHE_TAG_DEVTLB pueden permanecer en la lista incluso después de que se libere el dominio, lo que provoca una condición de use-after-free. Este problema realmente aparece cuando múltiples VF de diferentes PF pasan a un solo proceso de espacio de usuario a través de vfio-pci. En tales casos, el núcleo puede bloquearse con mensajes como: ERROR: desreferencia de puntero NULL del núcleo, dirección: 0000000000000014 PGD 19036a067 P4D 1940a3067 PUD 136c9b067 PMD 0 Oops: Oops: 0000 [#1] PREEMPT SMP NOPTI CPU: 74 UID: 0 PID: 3183 Comm: testCli No contaminado 6.11.9 #2 RIP: 0010:cache_tag_flush_range+0x9b/0x250 Rastreo de llamadas:  ? __die+0x1f/0x60 ? page_fault_oops+0x163/0x590 ? exc_page_fault+0x72/0x190 ? asm_exc_page_fault+0x22/0x30 ? rango_de_desinfección_de_etiquetas_de_caché+0x9b/0x250 ? cache_tag_flush_range+0x5d/0x250 intel_iommu_tlb_sync+0x29/0x40 intel_iommu_unmap_pages+0xfe/0x160 __iommu_unmap+0xd8/0x1a0 vfio_unmap_unpin+0x182/0x340 [vfio_iommu_type1] vfio_remove_dma+0x2a/0xb0 [vfio_iommu_type1] vfio_iommu_type1_ioctl+0xafa/0x18e0 [vfio_iommu_type1] Mueva cache_tag_unassign_domain() antes de iommu_disable_pci_caps() para solucionarlo.\"}],\"metrics\":{\"cvssMetricV31\":[{\"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},{\"source\":\"134c704f-9b21-4f2e-91b3-4a467353bcc0\",\"type\":\"Secondary\",\"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\":\"CWE-401\"},{\"lang\":\"en\",\"value\":\"CWE-416\"},{\"lang\":\"en\",\"value\":\"CWE-476\"}]},{\"source\":\"134c704f-9b21-4f2e-91b3-4a467353bcc0\",\"type\":\"Secondary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-416\"}]}],\"configurations\":[{\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"6.10\",\"versionEndExcluding\":\"6.12.6\",\"matchCriteriaId\":\"EFB33A9C-69D1-4691-B0BD-2D5C9590E239\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:6.13:rc1:*:*:*:*:*:*\",\"matchCriteriaId\":\"62567B3C-6CEE-46D0-BC2E-B3717FBF7D13\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:6.13:rc2:*:*:*:*:*:*\",\"matchCriteriaId\":\"5A073481-106D-4B15-B4C7-FB0213B8E1D4\"}]}]}],\"references\":[{\"url\":\"https://git.kernel.org/stable/c/1f2557e08a617a4b5e92a48a1a9a6f86621def18\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/9a0a72d3ed919ebe6491f527630998be053151d8\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]}]}}",
      vulnrichment: {
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}


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