CVE-2024-56669

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.

CVSS v3 7.8 HIGH

7.8^/10

CVSS v3 : HIGH

V3 Legend

Vector :

Exploitability : 1.8 / Impact : 5.9

Attack Vector LOCAL

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://git.kernel.org/stable/c/1f2557e08a617a4b5e92a48a1a9a6f86621def18	Patch
https://git.kernel.org/stable/c/9a0a72d3ed919ebe6491f527630998be053151d8	Patch

Configurations

Configuration 1 (hide)

OR	cpe:2.3:o:linux:linux_kernel::::::::
	cpe:2.3:o:linux:linux_kernel:6.13:rc1::::::
	cpe:2.3:o:linux:linux_kernel:6.13:rc2::::::

History

06 Jan 2025, 18:19

Type	Values Removed	Values Added
CVSS	v2 : ~~unknown~~ v3 : ~~unknown~~	v2 : unknown v3 : 7.8
First Time		Linux Linux linux Kernel
Summary		(es) 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.
CPE		cpe:2.3:o:linux:linux_kernel:6.13:rc2:::::: cpe:2.3:o:linux:linux_kernel:::::::: cpe:2.3:o:linux:linux_kernel:6.13:rc1::::::
CWE		CWE-401 CWE-416 CWE-476
References	~~() https://git.kernel.org/stable/c/1f2557e08a617a4b5e92a48a1a9a6f86621def18 -~~	() https://git.kernel.org/stable/c/1f2557e08a617a4b5e92a48a1a9a6f86621def18 - Patch
References	~~() https://git.kernel.org/stable/c/9a0a72d3ed919ebe6491f527630998be053151d8 -~~	() https://git.kernel.org/stable/c/9a0a72d3ed919ebe6491f527630998be053151d8 - Patch

27 Dec 2024, 15:15

Type	Values Removed	Values Added
New CVE

Information

Published : 2024-12-27 15:15

Updated : 2025-02-11 16:15

NVD link : CVE-2024-56669

Mitre link : CVE-2024-56669

CVE.ORG link : CVE-2024-56669

JSON object : View

Products Affected

linux

linux_kernel

CWE

CWE-401

Missing Release of Memory after Effective Lifetime

CWE-416

Use After Free

CWE-476

NULL Pointer Dereference

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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 cach\u00e9 antes de deshabilitar ATS La implementaci\u00f3n actual elimina las etiquetas de cach\u00e9 despu\u00e9s de deshabilitar ATS, lo que genera posibles fugas de memoria y fallas del kernel. Espec\u00edficamente, las etiquetas de cach\u00e9 de tipo CACHE_TAG_DEVTLB pueden permanecer en la lista incluso despu\u00e9s de que se libere el dominio, lo que provoca una condici\u00f3n de use-after-free. Este problema realmente aparece cuando m\u00faltiples VF de diferentes PF pasan a un solo proceso de espacio de usuario a trav\u00e9s de vfio-pci. En tales casos, el n\u00facleo puede bloquearse con mensajes como: ERROR: desreferencia de puntero NULL del n\u00facleo, direcci\u00f3n: 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_desinfecci\u00f3n_de_etiquetas_de_cach\u00e9+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."}], "lastModified": "2025-02-11T16:15:47.333", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "EFB33A9C-69D1-4691-B0BD-2D5C9590E239", "versionEndExcluding": "6.12.6", "versionStartIncluding": "6.10"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:6.13:rc1:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "62567B3C-6CEE-46D0-BC2E-B3717FBF7D13"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:6.13:rc2:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "5A073481-106D-4B15-B4C7-FB0213B8E1D4"}], "operator": "OR"}]}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}

7.8 /10