Vulnerability-Lookup

GHSA-6352-5P2F-GV84

Vulnerability from github – Published: 2024-11-05 18:32 – Updated: 2025-11-04 00:31

Details

In the Linux kernel, the following vulnerability has been resolved:

iommu/vt-d: Fix incorrect pci_for_each_dma_alias() for non-PCI devices

Previously, the domain_context_clear() function incorrectly called pci_for_each_dma_alias() to set up context entries for non-PCI devices. This could lead to kernel hangs or other unexpected behavior.

Add a check to only call pci_for_each_dma_alias() for PCI devices. For non-PCI devices, domain_context_clear_one() is called directly.

Severity

5.5 (Medium)


                  
                    CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

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{
  "affected": [],
  "aliases": [
    "CVE-2024-50101"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2024-11-05T18:15:13Z",
    "severity": "MODERATE"
  },
  "details": "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.",
  "id": "GHSA-6352-5p2f-gv84",
  "modified": "2025-11-04T00:31:54Z",
  "published": "2024-11-05T18:32:12Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2024-50101"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/04d6826ba7ba81213422276e96c90c6565169e1c"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/0bd9a30c22afb5da203386b811ec31429d2caa78"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/6e02a277f1db24fa039e23783c8921c7b0e5b1b3"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/cbfa3a83eba05240ce37839ed48280a05e8e8f6c"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/fe2e0b6cd00abea3efac66de1da22d844364c1b0"
    },
    {
      "type": "WEB",
      "url": "https://lists.debian.org/debian-lts-announce/2025/01/msg00001.html"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    }
  ]
}

CVE-2024-50101 (GCVE-0-2024-50101)

Vulnerability from cvelistv5 – Published: 2024-11-05 17:07 – Updated: 2026-08-05 11:41

Title

iommu/vt-d: Fix incorrect pci_for_each_dma_alias() for non-PCI devices

Summary

In the Linux kernel, the following vulnerability has been resolved: iommu/vt-d: Fix incorrect pci_for_each_dma_alias() for non-PCI devices Previously, the domain_context_clear() function incorrectly called pci_for_each_dma_alias() to set up context entries for non-PCI devices. This could lead to kernel hangs or other unexpected behavior. Add a check to only call pci_for_each_dma_alias() for PCI devices. For non-PCI devices, domain_context_clear_one() is called directly.

Severity

7.8 (High)


                        
                          CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

5.5 (Medium)


                        
                          CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2025-10-01 20:22 UTC

CWE

CWE-noinfo Not enough information

Assigner

Linux mitre root

References

6 references

URL	Tags
https://git.kernel.org/stable/c/0bd9a30c22afb5da2…
https://git.kernel.org/stable/c/cbfa3a83eba05240c…
https://git.kernel.org/stable/c/fe2e0b6cd00abea3e…
https://git.kernel.org/stable/c/04d6826ba7ba81213…
https://git.kernel.org/stable/c/6e02a277f1db24fa0…
https://lists.debian.org/debian-lts-announce/2025…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: 9807860f6ad446459d0446550cf4a2dc23bbee6c , < 0bd9a30c22afb5da203386b811ec31429d2caa78 (git) Affected: 59862b869275c27beb25cda2054b59a8b5d04970 , < cbfa3a83eba05240ce37839ed48280a05e8e8f6c (git) Affected: 48f2183a4f9d3540fc5cfc8f8451621ee92c09f8 , < fe2e0b6cd00abea3efac66de1da22d844364c1b0 (git) Affected: 9a16ab9d640274b20813d2d17475e18d3e99d834 , < 04d6826ba7ba81213422276e96c90c6565169e1c (git) Affected: 9a16ab9d640274b20813d2d17475e18d3e99d834 , < 6e02a277f1db24fa039e23783c8921c7b0e5b1b3 (git) Affected: 5.15.142 , < 5.15.169 (semver) Affected: 6.1.66 , < 6.1.114 (semver) Affected: 6.6.5 , < 6.6.58 (semver)
Linux	Linux	Affected: 6.7 Unaffected: 0 , < 6.7 (semver) Unaffected: 5.15.169 , ≤ 5.15.* (semver) Unaffected: 6.1.114 , ≤ 6.1.* (semver) Unaffected: 6.6.58 , ≤ 6.6.* (semver) Unaffected: 6.11.5 , ≤ 6.11.* (semver) Unaffected: 6.12 , ≤ * (original_commit_for_fix)

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{
  "containers": {
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        "metrics": [
          {
            "cvssV3_1": {
              "attackComplexity": "LOW",
              "attackVector": "LOCAL",
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              "baseScore": 5.5,
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              "confidentialityImpact": "NONE",
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              "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 \u2014 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\u0027s 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-\u003ebus-\u003enumber`, `bus-\u003eself`, `bus-\u003eparent`, `tmp-\u003esubordinate-\u003enumber`), 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."
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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.

Detection rules are retrieved from Rulezet.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
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.

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