FKIE_CVE-2026-80687

Vulnerability from fkie_nvd - Published: 2026-08-28 08:16 - Updated: 2026-08-28 08:16
Severity
Summary
In the Linux kernel, the following vulnerability has been resolved: iommufd/viommu: Release the igroup lock on the vdevice_size error path iommufd_vdevice_alloc_ioctl() takes idev->igroup->lock, then validates the driver's vdevice_size against the core structure size with a WARN_ON_ONCE. On failure that guard jumps to out_put_idev, below out_unlock_igroup, so it skips the mutex_unlock(), leaving the igroup lock held and deadlocking the next vDEVICE operation on that group. Jump to out_unlock_igroup instead.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/294b464b2be7e57872864cb6936e1d9c7294f89d
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/339bd11591593ab7ce88136ab7fd01ef3813b724
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/ca9e49e1c8931a4e6e743a1f1d2e7f977f774b86
Impacted products
Vendor Product Version
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/iommu/iommufd/viommu.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "294b464b2be7e57872864cb6936e1d9c7294f89d",
              "status": "affected",
              "version": "ed42eee797ff3dc889ade63c1dd7c4f430699e23",
              "versionType": "git"
            },
            {
              "lessThan": "ca9e49e1c8931a4e6e743a1f1d2e7f977f774b86",
              "status": "affected",
              "version": "ed42eee797ff3dc889ade63c1dd7c4f430699e23",
              "versionType": "git"
            },
            {
              "lessThan": "339bd11591593ab7ce88136ab7fd01ef3813b724",
              "status": "affected",
              "version": "ed42eee797ff3dc889ade63c1dd7c4f430699e23",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/iommu/iommufd/viommu.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "6.17"
            },
            {
              "lessThan": "6.17",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.44",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.1.*",
              "status": "unaffected",
              "version": "7.1.8",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.2",
              "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\niommufd/viommu: Release the igroup lock on the vdevice_size error path\n\niommufd_vdevice_alloc_ioctl() takes idev-\u003eigroup-\u003elock, then validates the\ndriver\u0027s vdevice_size against the core structure size with a WARN_ON_ONCE.\nOn failure that guard jumps to out_put_idev, below out_unlock_igroup, so it\nskips the mutex_unlock(), leaving the igroup lock held and deadlocking the\nnext vDEVICE operation on that group.\n\nJump to out_unlock_igroup instead."
    }
  ],
  "id": "CVE-2026-80687",
  "lastModified": "2026-08-28T08:16:54.170",
  "metrics": {},
  "published": "2026-08-28T08:16:54.170",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/294b464b2be7e57872864cb6936e1d9c7294f89d"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/339bd11591593ab7ce88136ab7fd01ef3813b724"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/ca9e49e1c8931a4e6e743a1f1d2e7f977f774b86"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Received"
}



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