GHSA-CM7X-4MVP-C2JF
Vulnerability from github – Published: 2024-12-27 15:31 – Updated: 2025-01-06 18:31In 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: ? __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.
{
"affected": [],
"aliases": [
"CVE-2024-56669"
],
"database_specific": {
"cwe_ids": [
"CWE-401",
"CWE-416"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2024-12-27T15:15:26Z",
"severity": "HIGH"
},
"details": "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 \u003cTASK\u003e\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.",
"id": "GHSA-cm7x-4mvp-c2jf",
"modified": "2025-01-06T18:31:01Z",
"published": "2024-12-27T15:31:56Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2024-56669"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/1f2557e08a617a4b5e92a48a1a9a6f86621def18"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/9a0a72d3ed919ebe6491f527630998be053151d8"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
"type": "CVSS_V3"
}
]
}
Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
- 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.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- 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.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
Related by attack behaviour
Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.