FKIE_CVE-2026-93205

Vulnerability from fkie_nvd - Published: 2026-09-24 16:17 - Updated: 2026-09-25 13:17
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
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/2235eafda9b3df9295efd0593cd4a8977440c3f6
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/2bd22a0d40503a65d243b011de146603c8ce1cbc
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/78fd5a2d65f3546cb4285f8e52f445baecbd00e0
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/981686f4137760a16a03c5193f11d85133533f93
Impacted products
Vendor Product Version
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "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": [
            {
              "lessThan": "981686f4137760a16a03c5193f11d85133533f93",
              "status": "affected",
              "version": "395ad89d11fd93f79a6b942e91fc409807a63c4b",
              "versionType": "git"
            },
            {
              "lessThan": "2235eafda9b3df9295efd0593cd4a8977440c3f6",
              "status": "affected",
              "version": "395ad89d11fd93f79a6b942e91fc409807a63c4b",
              "versionType": "git"
            },
            {
              "lessThan": "78fd5a2d65f3546cb4285f8e52f445baecbd00e0",
              "status": "affected",
              "version": "395ad89d11fd93f79a6b942e91fc409807a63c4b",
              "versionType": "git"
            },
            {
              "lessThan": "2bd22a0d40503a65d243b011de146603c8ce1cbc",
              "status": "affected",
              "version": "395ad89d11fd93f79a6b942e91fc409807a63c4b",
              "versionType": "git"
            }
          ]
        },
        {
          "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": [
            {
              "status": "affected",
              "version": "5.14"
            },
            {
              "lessThan": "5.14",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.109",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.50",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.2.*",
              "status": "unaffected",
              "version": "7.2.4",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.3-rc1",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
  "cveTags": [],
  "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."
    }
  ],
  "id": "CVE-2026-93205",
  "lastModified": "2026-09-25T13:17:17.453",
  "metrics": {},
  "published": "2026-09-24T16:17:14.523",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/2235eafda9b3df9295efd0593cd4a8977440c3f6"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/2bd22a0d40503a65d243b011de146603c8ce1cbc"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/78fd5a2d65f3546cb4285f8e52f445baecbd00e0"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/981686f4137760a16a03c5193f11d85133533f93"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Received"
}



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