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drm: fix race between partial drm_dev_register() failure and ioctl

Type: advisorySource: Official CVE List1 source record

In the Linux kernel, the following vulnerability has been resolved: drm: fix race between partial drm_dev_register() failure and ioctl If drm_dev_register() fails after registering a minor (e.g. render minor registered, primary minor fails), userspace could have opened the first minor and entered a drm_dev_enter() critical section. Since the unplugged flag was never set, the ioctl proceeds while the error path tears down device resources. Fix this by introducing drm_dev_synchronize_unplug(), which sets the unplugged flag and waits for the SRCU barrier, ensuring all in-flight drm_dev_enter() critical sections complete before cleanup proceeds; call it on the error path of drm_dev_register().

Announced Source revision 1
Original source ↗

CVE-2026-89823

Primary source · Revision 1

Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.

Security context

Source reference: cve:CVE-2026-89823

Linux

Source reference: /containers/cna/affected/0/product

Affected versions
Not stated in this record
Fixed versions
Not stated in this record
Prerequisites
Not stated in this record

Linux

Source reference: /containers/cna/affected/1/product

Affected versions
Not stated in this record
Fixed versions
Not stated in this record
Prerequisites
Not stated in this record

Structured affected-version data

Original package identities and version rules from this source.

[
  {
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "vendor": "Linux",
    "product": "Linux",
    "versions": [
      {
        "status": "affected",
        "version": "bee330f3d67273a68dcb99f59480d59553c008b2",
        "lessThan": "26d9162213952927cd59c0d94b7e0e992b347bec",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "bee330f3d67273a68dcb99f59480d59553c008b2",
        "lessThan": "24d28d15c0f7f7d4a1c229f8730314f0f8758810",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "bee330f3d67273a68dcb99f59480d59553c008b2",
        "lessThan": "6729990df9e70623bf53f855b521ae71ca9cb278",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "bee330f3d67273a68dcb99f59480d59553c008b2",
        "lessThan": "a0a7e2e177f2f18b9e7318a4c64ac44efd9ef22c",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "bee330f3d67273a68dcb99f59480d59553c008b2",
        "lessThan": "19dbfe4d586aecfed121cb3fa62281761d9d341f",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "bee330f3d67273a68dcb99f59480d59553c008b2",
        "lessThan": "79d09cfe90304ff4f195e47d569800f5e0f8b854",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "bee330f3d67273a68dcb99f59480d59553c008b2",
        "lessThan": "2d1215a72159d00001e08dee162e27718934bee9",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "bee330f3d67273a68dcb99f59480d59553c008b2",
        "lessThan": "eb197f7d60f00d0f5b1b3505dfc86a7e36045a3e",
        "versionType": "git"
      }
    ],
    "programFiles": [
      "drivers/gpu/drm/drm_drv.c"
    ],
    "defaultStatus": "unaffected"
  },
  {
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "vendor": "Linux",
    "product": "Linux",
    "versions": [
      {
        "status": "affected",
        "version": "4.18"
      },
      {
        "status": "unaffected",
        "version": "0",
        "lessThan": "4.18",
        "versionType": "semver"
      },
      {
        "status": "unaffected",
        "version": "5.10.270",
        "versionType": "semver",
        "lessThanOrEqual": "5.10.*"
      },
      {
        "status": "unaffected",
        "version": "5.15.221",
        "versionType": "semver",
        "lessThanOrEqual": "5.15.*"
      },
      {
        "status": "unaffected",
        "version": "6.1.188",
        "versionType": "semver",
        "lessThanOrEqual": "6.1.*"
      },
      {
        "status": "unaffected",
        "version": "6.6.157",
        "versionType": "semver",
        "lessThanOrEqual": "6.6.*"
      },
      {
        "status": "unaffected",
        "version": "6.12.110",
        "versionType": "semver",
        "lessThanOrEqual": "6.12.*"
      },
      {
        "status": "unaffected",
        "version": "6.18.51",
        "versionType": "semver",
        "lessThanOrEqual": "6.18.*"
      },
      {
        "status": "unaffected",
        "version": "7.2.5",
        "versionType": "semver",
        "lessThanOrEqual": "7.2.*"
      },
      {
        "status": "unaffected",
        "version": "7.3",
        "versionType": "original_commit_for_fix",
        "lessThanOrEqual": "*"
      }
    ],
    "programFiles": [
      "drivers/gpu/drm/drm_drv.c"
    ],
    "defaultStatus": "affected"
  }
]
Related CVEs
CVE-2026-89823

Source reference: /cveMetadata/cveId

Publisher severity

high

Source reference: /containers/cna/metrics

Event
#36282 · Revision 1
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Publisher date
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