Vulnerability-Lookup

GHSA-MMX6-88QC-4G5C

Vulnerability from github – Published: 2024-08-21 09:31 – Updated: 2024-09-11 18:31

Details

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

iommu/arm-smmu-v3: Don't unregister on shutdown

Similar to SMMUv2, this driver calls iommu_device_unregister() from the shutdown path, which removes the IOMMU groups with no coordination whatsoever with their users - shutdown methods are optional in device drivers. This can lead to NULL pointer dereferences in those drivers' DMA API calls, or worse.

Instead of calling the full arm_smmu_device_remove() from arm_smmu_device_shutdown(), let's pick only the relevant function call - arm_smmu_device_disable() - more or less the reverse of arm_smmu_device_reset() - and call just that from the shutdown path.

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-2022-48894"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-476"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2024-08-21T07:15:05Z",
    "severity": "MODERATE"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\niommu/arm-smmu-v3: Don\u0027t unregister on shutdown\n\nSimilar to SMMUv2, this driver calls iommu_device_unregister() from the\nshutdown path, which removes the IOMMU groups with no coordination\nwhatsoever with their users - shutdown methods are optional in device\ndrivers. This can lead to NULL pointer dereferences in those drivers\u0027\nDMA API calls, or worse.\n\nInstead of calling the full arm_smmu_device_remove() from\narm_smmu_device_shutdown(), let\u0027s pick only the relevant function call -\narm_smmu_device_disable() - more or less the reverse of\narm_smmu_device_reset() - and call just that from the shutdown path.",
  "id": "GHSA-mmx6-88qc-4g5c",
  "modified": "2024-09-11T18:31:02Z",
  "published": "2024-08-21T09:31:32Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2022-48894"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/32ea2c57dc216b6ad8125fa680d31daa5d421c95"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/ead3e6c79479890444c777fd329afc125fecde48"
    }
  ],
  "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-2022-48894 (GCVE-0-2022-48894)

Vulnerability from cvelistv5 – Published: 2024-08-21 06:10 – Updated: 2026-05-11 18:49

Title

iommu/arm-smmu-v3: Don't unregister on shutdown

Summary

In the Linux kernel, the following vulnerability has been resolved: iommu/arm-smmu-v3: Don't unregister on shutdown Similar to SMMUv2, this driver calls iommu_device_unregister() from the shutdown path, which removes the IOMMU groups with no coordination whatsoever with their users - shutdown methods are optional in device drivers. This can lead to NULL pointer dereferences in those drivers' DMA API calls, or worse. Instead of calling the full arm_smmu_device_remove() from arm_smmu_device_shutdown(), let's pick only the relevant function call - arm_smmu_device_disable() - more or less the reverse of arm_smmu_device_reset() - and call just that from the shutdown path.

Severity

No CVSS data available.

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2024-09-10 16:04 UTC

Assigner

Linux mitre root

References

2 references

URL	Tags
https://git.kernel.org/stable/c/ead3e6c7947989044…
https://git.kernel.org/stable/c/32ea2c57dc216b6ad…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: 57365a04c92126525a58bf7a1599ddfa832415e9 , < ead3e6c79479890444c777fd329afc125fecde48 (git) Affected: 57365a04c92126525a58bf7a1599ddfa832415e9 , < 32ea2c57dc216b6ad8125fa680d31daa5d421c95 (git)
Linux	Linux	Affected: 6.1 Unaffected: 0 , < 6.1 (semver) Unaffected: 6.1.7 , ≤ 6.1.* (semver) Unaffected: 6.2 , ≤ * (original_commit_for_fix)

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                "id": "CVE-2022-48894",
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                  },
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                "timestamp": "2024-09-10T16:04:12.466609Z",
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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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