{
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/amdgpu/sdma4: replace BUG_ON with WARN_ON in fence emission\n\nsdma_v4_0_ring_emit_fence() contains two BUG_ON(addr \u0026 0x3) assertions\nthat verify fence writeback addresses are dword-aligned.  These\nassertions can be reached from unprivileged userspace via crafted\nDRM_IOCTL_AMDGPU_CS submissions, causing a fatal kernel panic in a\nscheduler worker thread.\n\nReplace both BUG_ON() calls with WARN_ON() to log the condition without\ncrashing the kernel.  A misaligned fence address at this point indicates\na driver bug, but crashing the kernel is never the correct response when\nthe assertion is reachable from userspace.\n\nThe CS IOCTL path is the correct place to filter invalid submissions;\nthe ring emission callback is too late to do anything about it.\n\n(cherry picked from commit b90250bd933afd1ba94d86d6b13821997b22b18e)"
    }
  ],
  "id": "CVE-2026-46220",
  "lastModified": "2026-05-28T13:44:01.663",
  "metrics": {},
  "published": "2026-05-28T10:16:37.640",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/0b91ea46bb68abf98a082bf239092253bbd6aaa2"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/4f7ca00fa91daf0795ec6b3b130c5ebba1f155fe"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/78d2e624fa073c14970aa097adcf3ea31c157a66"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/a4fd82fb0757c180bf622907397c528b89a827b2"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/d331fb241a4602253976ddd65144a8ba2b05665d"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Awaiting Analysis"
}

Show details on source website

{
  "affected": [],
  "aliases": [
    "CVE-2026-46220"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-05-28T10:16:37Z",
    "severity": null
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/amdgpu/sdma4: replace BUG_ON with WARN_ON in fence emission\n\nsdma_v4_0_ring_emit_fence() contains two BUG_ON(addr \u0026 0x3) assertions\nthat verify fence writeback addresses are dword-aligned.  These\nassertions can be reached from unprivileged userspace via crafted\nDRM_IOCTL_AMDGPU_CS submissions, causing a fatal kernel panic in a\nscheduler worker thread.\n\nReplace both BUG_ON() calls with WARN_ON() to log the condition without\ncrashing the kernel.  A misaligned fence address at this point indicates\na driver bug, but crashing the kernel is never the correct response when\nthe assertion is reachable from userspace.\n\nThe CS IOCTL path is the correct place to filter invalid submissions;\nthe ring emission callback is too late to do anything about it.\n\n(cherry picked from commit b90250bd933afd1ba94d86d6b13821997b22b18e)",
  "id": "GHSA-5vh3-fx9f-223v",
  "modified": "2026-05-28T12:30:33Z",
  "published": "2026-05-28T12:30:33Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-46220"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/0b91ea46bb68abf98a082bf239092253bbd6aaa2"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/4f7ca00fa91daf0795ec6b3b130c5ebba1f155fe"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/78d2e624fa073c14970aa097adcf3ea31c157a66"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/a4fd82fb0757c180bf622907397c528b89a827b2"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/d331fb241a4602253976ddd65144a8ba2b05665d"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}

{
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    "category": "csaf_vex",
    "csaf_version": "2.0",
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      "tlp": {
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        "url": "https://www.first.org/tlp/"
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    "lang": "en-US",
    "notes": [
      {
        "category": "general",
        "text": "To determine the support lifecycle for your software, see the Microsoft Support Lifecycle: https://support.microsoft.com/lifecycle",
        "title": "Additional Resources"
      },
      {
        "category": "legal_disclaimer",
        "text": "The information provided in the Microsoft Knowledge Base is provided \\\"as is\\\" without warranty of any kind. Microsoft disclaims all warranties, either express or implied, including the warranties of merchantability and fitness for a particular purpose. In no event shall Microsoft Corporation or its suppliers be liable for any damages whatsoever including direct, indirect, incidental, consequential, loss of business profits or special damages, even if Microsoft Corporation or its suppliers have been advised of the possibility of such damages. Some states do not allow the exclusion or limitation of liability for consequential or incidental damages so the foregoing limitation may not apply.",
        "title": "Disclaimer"
      }
    ],
    "publisher": {
      "category": "vendor",
      "contact_details": "secure@microsoft.com",
      "name": "Microsoft Security Response Center",
      "namespace": "https://msrc.microsoft.com"
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    "references": [
      {
        "category": "self",
        "summary": "CVE-2026-46220 drm/amdgpu/sdma4: replace BUG_ON with WARN_ON in fence emission - VEX",
        "url": "https://msrc.microsoft.com/csaf/vex/2026/msrc_cve-2026-46220.json"
      },
      {
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        "summary": "Microsoft Support Lifecycle",
        "url": "https://support.microsoft.com/lifecycle"
      },
      {
        "category": "external",
        "summary": "Common Vulnerability Scoring System",
        "url": "https://www.first.org/cvss"
      }
    ],
    "title": "drm/amdgpu/sdma4: replace BUG_ON with WARN_ON in fence emission",
    "tracking": {
      "current_release_date": "2026-05-29T01:04:59.000Z",
      "generator": {
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      "initial_release_date": "2026-05-02T00:00:00.000Z",
      "revision_history": [
        {
          "date": "2026-05-29T01:04:59.000Z",
          "legacy_version": "1",
          "number": "1",
          "summary": "Information published."
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                "product": {
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  "vulnerabilities": [
    {
      "cve": "CVE-2026-46220",
      "notes": [
        {
          "category": "general",
          "text": "Linux",
          "title": "Assigning CNA"
        }
      ],
      "product_status": {
        "under_investigation": [
          "17084-1"
        ]
      },
      "references": [
        {
          "category": "self",
          "summary": "CVE-2026-46220 drm/amdgpu/sdma4: replace BUG_ON with WARN_ON in fence emission - VEX",
          "url": "https://msrc.microsoft.com/csaf/vex/2026/msrc_cve-2026-46220.json"
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      ],
      "title": "drm/amdgpu/sdma4: replace BUG_ON with WARN_ON in fence emission"
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  ]
}