CVE-2022-48894 (GCVE-0-2022-48894)

Vulnerability from cvelistv5 – Published: 2024-08-21 06:10 – Updated: 2026-05-11 18:49
VLAI
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
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: 57365a04c92126525a58bf7a1599ddfa832415e9 , < ead3e6c79479890444c777fd329afc125fecde48 (git)
Affected: 57365a04c92126525a58bf7a1599ddfa832415e9 , < 32ea2c57dc216b6ad8125fa680d31daa5d421c95 (git)
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Linux Linux Affected: 6.1
Unaffected: 0 , < 6.1 (semver)
Unaffected: 6.1.7 , ≤ 6.1.* (semver)
Unaffected: 6.2 , ≤ * (original_commit_for_fix)
guessed Create a notification for this product.
Show details on NVD website
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                      "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                      "versionEndExcluding": "6.1.7",
                      "versionStartIncluding": "6.1",
                      "vulnerable": true
                    },
                    {
                      "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                      "versionEndExcluding": "6.2",
                      "versionStartIncluding": "6.1",
                      "vulnerable": true
                    }
                  ],
                  "negate": false,
                  "operator": "OR"
                }
              ]
            }
          ],
          "descriptions": [
            {
              "lang": "en",
              "value": "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."
            }
          ],
          "providerMetadata": {
            "dateUpdated": "2025-05-04T08:25:38.881Z",
            "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "shortName": "Linux"
          },
          "references": [
            {
              "url": "https://git.kernel.org/stable/c/ead3e6c79479890444c777fd329afc125fecde48"
            },
            {
              "url": "https://git.kernel.org/stable/c/32ea2c57dc216b6ad8125fa680d31daa5d421c95"
            }
          ],
          "title": "iommu/arm-smmu-v3: Don\u0027t unregister on shutdown",
          "x_generator": {
            "engine": "bippy-1.2.0"
          }
        }
      },
      "cveMetadata": {
        "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "assignerShortName": "Linux",
        "cveId": "CVE-2022-48894",
        "datePublished": "2024-08-21T06:10:26.515Z",
        "dateReserved": "2024-08-21T06:06:23.290Z",
        "dateUpdated": "2025-05-04T08:25:38.881Z",
        "state": "PUBLISHED"
      },
      "dataType": "CVE_RECORD",
      "dataVersion": "5.1"
    }
  }
}



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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

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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.



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.