CVE-2026-93205 (GCVE-0-2026-93205)
Vulnerability from cvelistv5
Published
2026-09-24 15:10
Modified
2026-10-21 12:52
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: iommu/arm-smmu-v3: Manage teardown with devm arm_smmu_device_remove() manually frees the IOPF queue, destroys the vmid_map and disables the device, while the IRQs and queues are devm managed. devm unwinds only after remove() returns, so the cleanup runs in the wrong order. The IOPF queue is freed before the event-queue IRQ whose handler uses it. Manage all of it with devm so the unwind order is correct. Free the IOPF queue and vmid_map via devm actions, and disable the device from one registered after arm_smmu_device_reset(). This is also a prerequisite for fixing a Tegra241 CMDQV CMD_SYNC use-after-free in the subsequent patch.
References
Impacted products
Vendor Product Version
Linux Linux Version: 395ad89d11fd93f79a6b942e91fc409807a63c4b
Version: 395ad89d11fd93f79a6b942e91fc409807a63c4b
Version: 395ad89d11fd93f79a6b942e91fc409807a63c4b
Version: 395ad89d11fd93f79a6b942e91fc409807a63c4b
Version: 395ad89d11fd93f79a6b942e91fc409807a63c4b
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{
  "containers": {
    "cna": {
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        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c"
          ],
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        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
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              "status": "affected",
              "version": "5.14"
            },
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              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
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              "versionType": "semver"
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              "status": "unaffected",
              "version": "6.18.50",
              "versionType": "semver"
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              "status": "unaffected",
              "version": "7.2.4",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.3",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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                  "versionStartIncluding": "5.14",
                  "vulnerable": true
                },
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                  "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: Manage teardown with devm\n\narm_smmu_device_remove() manually frees the IOPF queue, destroys the\nvmid_map and disables the device, while the IRQs and queues are devm\nmanaged. devm unwinds only after remove() returns, so the cleanup runs\nin the wrong order. The IOPF queue is freed before the event-queue IRQ\nwhose handler uses it.\n\nManage all of it with devm so the unwind order is correct. Free the IOPF\nqueue and vmid_map via devm actions, and disable the device from one\nregistered after arm_smmu_device_reset().\n\nThis is also a prerequisite for fixing a Tegra241 CMDQV CMD_SYNC\nuse-after-free in the subsequent patch."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-10-21T12:52:20.679Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/64b1a9384db9cabf1bde378a2d5c1923fd67ea0d"
        },
        {
          "url": "https://git.kernel.org/stable/c/981686f4137760a16a03c5193f11d85133533f93"
        },
        {
          "url": "https://git.kernel.org/stable/c/2235eafda9b3df9295efd0593cd4a8977440c3f6"
        },
        {
          "url": "https://git.kernel.org/stable/c/78fd5a2d65f3546cb4285f8e52f445baecbd00e0"
        },
        {
          "url": "https://git.kernel.org/stable/c/2bd22a0d40503a65d243b011de146603c8ce1cbc"
        }
      ],
      "title": "iommu/arm-smmu-v3: Manage teardown with devm",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-93205",
    "datePublished": "2026-09-24T15:10:28.406Z",
    "dateReserved": "2026-09-17T16:02:15.093Z",
    "dateUpdated": "2026-10-21T12:52:20.679Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}


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