Vulnerability-Lookup

GHSA-5VH3-FX9F-223V

Vulnerability from github – Published: 2026-05-28 12:30 – Updated: 2026-05-28 12:30

Details

In the Linux kernel, the following vulnerability has been resolved:

drm/amdgpu/sdma4: replace BUG_ON with WARN_ON in fence emission

sdma_v4_0_ring_emit_fence() contains two BUG_ON(addr & 0x3) assertions that verify fence writeback addresses are dword-aligned. These assertions can be reached from unprivileged userspace via crafted DRM_IOCTL_AMDGPU_CS submissions, causing a fatal kernel panic in a scheduler worker thread.

Replace both BUG_ON() calls with WARN_ON() to log the condition without crashing the kernel. A misaligned fence address at this point indicates a driver bug, but crashing the kernel is never the correct response when the assertion is reachable from userspace.

The CS IOCTL path is the correct place to filter invalid submissions; the ring emission callback is too late to do anything about it.

(cherry picked from commit b90250bd933afd1ba94d86d6b13821997b22b18e)

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{
  "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": []
}

CVE-2026-46220 (GCVE-0-2026-46220)

Vulnerability from cvelistv5 – Published: 2026-05-28 09:40 – Updated: 2026-05-28 09:40

Title

drm/amdgpu/sdma4: replace BUG_ON with WARN_ON in fence emission

Summary

In the Linux kernel, the following vulnerability has been resolved: drm/amdgpu/sdma4: replace BUG_ON with WARN_ON in fence emission sdma_v4_0_ring_emit_fence() contains two BUG_ON(addr & 0x3) assertions that verify fence writeback addresses are dword-aligned. These assertions can be reached from unprivileged userspace via crafted DRM_IOCTL_AMDGPU_CS submissions, causing a fatal kernel panic in a scheduler worker thread. Replace both BUG_ON() calls with WARN_ON() to log the condition without crashing the kernel. A misaligned fence address at this point indicates a driver bug, but crashing the kernel is never the correct response when the assertion is reachable from userspace. The CS IOCTL path is the correct place to filter invalid submissions; the ring emission callback is too late to do anything about it. (cherry picked from commit b90250bd933afd1ba94d86d6b13821997b22b18e)

Severity

No CVSS data available.

Assigner

Linux

References

5 references

URL	Tags
https://git.kernel.org/stable/c/4f7ca00fa91daf079…
https://git.kernel.org/stable/c/d331fb241a4602253…
https://git.kernel.org/stable/c/0b91ea46bb68abf98…
https://git.kernel.org/stable/c/a4fd82fb0757c180b…
https://git.kernel.org/stable/c/78d2e624fa073c149…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: 2130f89ced2cc0f5113bb427c1cbc7a4ca7729c7 , < 4f7ca00fa91daf0795ec6b3b130c5ebba1f155fe (git) Affected: 2130f89ced2cc0f5113bb427c1cbc7a4ca7729c7 , < d331fb241a4602253976ddd65144a8ba2b05665d (git) Affected: 2130f89ced2cc0f5113bb427c1cbc7a4ca7729c7 , < 0b91ea46bb68abf98a082bf239092253bbd6aaa2 (git) Affected: 2130f89ced2cc0f5113bb427c1cbc7a4ca7729c7 , < a4fd82fb0757c180bf622907397c528b89a827b2 (git) Affected: 2130f89ced2cc0f5113bb427c1cbc7a4ca7729c7 , < 78d2e624fa073c14970aa097adcf3ea31c157a66 (git)
Linux	Linux	Affected: 4.12 Unaffected: 0 , < 4.12 (semver) Unaffected: 6.6.140 , ≤ 6.6.* (semver) Unaffected: 6.12.90 , ≤ 6.12.* (semver) Unaffected: 6.18.32 , ≤ 6.18.* (semver) Unaffected: 7.0.9 , ≤ 7.0.* (semver) Unaffected: 7.1-rc3 , ≤ * (original_commit_for_fix)

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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/gpu/drm/amd/amdgpu/sdma_v4_0.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
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              "status": "affected",
              "version": "2130f89ced2cc0f5113bb427c1cbc7a4ca7729c7",
              "versionType": "git"
            },
            {
              "lessThan": "d331fb241a4602253976ddd65144a8ba2b05665d",
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              "versionType": "git"
            },
            {
              "lessThan": "0b91ea46bb68abf98a082bf239092253bbd6aaa2",
              "status": "affected",
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              "versionType": "git"
            },
            {
              "lessThan": "a4fd82fb0757c180bf622907397c528b89a827b2",
              "status": "affected",
              "version": "2130f89ced2cc0f5113bb427c1cbc7a4ca7729c7",
              "versionType": "git"
            },
            {
              "lessThan": "78d2e624fa073c14970aa097adcf3ea31c157a66",
              "status": "affected",
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              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/gpu/drm/amd/amdgpu/sdma_v4_0.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "4.12"
            },
            {
              "lessThan": "4.12",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.140",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.90",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.32",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.0.*",
              "status": "unaffected",
              "version": "7.0.9",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.1-rc3",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.6.140",
                  "versionStartIncluding": "4.12",
                  "vulnerable": true
                },
                {
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                },
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                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.1-rc3",
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                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
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      ],
      "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)"
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-05-28T09:40:35.971Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/4f7ca00fa91daf0795ec6b3b130c5ebba1f155fe"
        },
        {
          "url": "https://git.kernel.org/stable/c/d331fb241a4602253976ddd65144a8ba2b05665d"
        },
        {
          "url": "https://git.kernel.org/stable/c/0b91ea46bb68abf98a082bf239092253bbd6aaa2"
        },
        {
          "url": "https://git.kernel.org/stable/c/a4fd82fb0757c180bf622907397c528b89a827b2"
        },
        {
          "url": "https://git.kernel.org/stable/c/78d2e624fa073c14970aa097adcf3ea31c157a66"
        }
      ],
      "title": "drm/amdgpu/sdma4: replace BUG_ON with WARN_ON in fence emission",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-46220",
    "datePublished": "2026-05-28T09:40:35.971Z",
    "dateReserved": "2026-05-13T15:03:33.106Z",
    "dateUpdated": "2026-05-28T09:40:35.971Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

Action not permitted

GHSA-5VH3-FX9F-223V

CVE-2026-46220 (GCVE-0-2026-46220)

Tags

Sightings

Nomenclature