Vulnerability-Lookup

GHSA-X75F-RQ9R-QMQ7

Vulnerability from github – Published: 2026-09-25 12:31 – Updated: 2026-09-25 12:31

Details

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

drm/amdgpu: skip the VMID 0 flush for VRAM

Clear-on-release only runs on VRAM, which amdgpu_ttm_map_buffer() reaches via its direct MC address without programming a GART window, yet the wipe still forces a VMID 0 flush. On GFX11 (e.g. Navi33) that spurious SDMA flush can wedge the engine; only flush when a GART window is actually used.

v2: Let amdgpu_ttm_map_buffer() return whether the VMID 0 flush is needed, and drive the clear and copy paths from that. (Christian) v3: Make the vm_needs_flush output parameter mandatory instead of allowing NULL. (Christian)

(cherry picked from commit a306e406e570b74318ff7d80e5b07b540ca1d3a9)

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{
  "affected": [],
  "aliases": [
    "CVE-2026-97928"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-09-25T11:17:20Z",
    "severity": null
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/amdgpu: skip the VMID 0 flush for VRAM\n\nClear-on-release only runs on VRAM, which amdgpu_ttm_map_buffer() reaches\nvia its direct MC address without programming a GART window, yet the wipe\nstill forces a VMID 0 flush. On GFX11 (e.g. Navi33) that spurious SDMA\nflush can wedge the engine; only flush when a GART window is actually used.\n\nv2: Let amdgpu_ttm_map_buffer() return whether the VMID 0 flush is needed,\n    and drive the clear and copy paths from that. (Christian)\nv3: Make the vm_needs_flush output parameter mandatory instead of\n    allowing NULL. (Christian)\n\n(cherry picked from commit a306e406e570b74318ff7d80e5b07b540ca1d3a9)",
  "id": "GHSA-x75f-rq9r-qmq7",
  "modified": "2026-09-25T12:31:28Z",
  "published": "2026-09-25T12:31:28Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-97928"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/241d7450cf75969cea450eb3e740cb9682f69c2f"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/87ceb8cba73d0b3c4025ff42495bccd8164acaed"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}

CVE-2026-97928 (GCVE-0-2026-97928)

Vulnerability from cvelistv5 – Published: 2026-09-25 10:22 – Updated: 2026-09-25 10:22

Title

drm/amdgpu: skip the VMID 0 flush for VRAM

Summary

In the Linux kernel, the following vulnerability has been resolved: drm/amdgpu: skip the VMID 0 flush for VRAM Clear-on-release only runs on VRAM, which amdgpu_ttm_map_buffer() reaches via its direct MC address without programming a GART window, yet the wipe still forces a VMID 0 flush. On GFX11 (e.g. Navi33) that spurious SDMA flush can wedge the engine; only flush when a GART window is actually used. v2: Let amdgpu_ttm_map_buffer() return whether the VMID 0 flush is needed, and drive the clear and copy paths from that. (Christian) v3: Make the vm_needs_flush output parameter mandatory instead of allowing NULL. (Christian) (cherry picked from commit a306e406e570b74318ff7d80e5b07b540ca1d3a9)

Severity

No CVSS data available.

Assigner

Linux mitre root Scorecard

References

2 references

URL	Tags
https://git.kernel.org/stable/c/241d7450cf75969ce…
https://git.kernel.org/stable/c/87ceb8cba73d0b3c4…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: a68c7eaa7a8ffdec9287ba1561a668d674c20a13 , < 241d7450cf75969cea450eb3e740cb9682f69c2f (git) Affected: a68c7eaa7a8ffdec9287ba1561a668d674c20a13 , < 87ceb8cba73d0b3c4025ff42495bccd8164acaed (git)
Linux	Linux	Affected: 6.10 Unaffected: 0 , < 6.10 (semver) Unaffected: 7.2.7 , ≤ 7.2.* (semver) Unaffected: 7.3-rc3 , ≤ * (original_commit_for_fix)

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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "241d7450cf75969cea450eb3e740cb9682f69c2f",
              "status": "affected",
              "version": "a68c7eaa7a8ffdec9287ba1561a668d674c20a13",
              "versionType": "git"
            },
            {
              "lessThan": "87ceb8cba73d0b3c4025ff42495bccd8164acaed",
              "status": "affected",
              "version": "a68c7eaa7a8ffdec9287ba1561a668d674c20a13",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "6.10"
            },
            {
              "lessThan": "6.10",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.2.*",
              "status": "unaffected",
              "version": "7.2.7",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.3-rc3",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.2.7",
                  "versionStartIncluding": "6.10",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.3-rc3",
                  "versionStartIncluding": "6.10",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/amdgpu: skip the VMID 0 flush for VRAM\n\nClear-on-release only runs on VRAM, which amdgpu_ttm_map_buffer() reaches\nvia its direct MC address without programming a GART window, yet the wipe\nstill forces a VMID 0 flush. On GFX11 (e.g. Navi33) that spurious SDMA\nflush can wedge the engine; only flush when a GART window is actually used.\n\nv2: Let amdgpu_ttm_map_buffer() return whether the VMID 0 flush is needed,\n    and drive the clear and copy paths from that. (Christian)\nv3: Make the vm_needs_flush output parameter mandatory instead of\n    allowing NULL. (Christian)\n\n(cherry picked from commit a306e406e570b74318ff7d80e5b07b540ca1d3a9)"
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-09-25T10:22:45.430Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/241d7450cf75969cea450eb3e740cb9682f69c2f"
        },
        {
          "url": "https://git.kernel.org/stable/c/87ceb8cba73d0b3c4025ff42495bccd8164acaed"
        }
      ],
      "title": "drm/amdgpu: skip the VMID 0 flush for VRAM",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-97928",
    "datePublished": "2026-09-25T10:22:45.430Z",
    "dateReserved": "2026-09-25T10:18:58.203Z",
    "dateUpdated": "2026-09-25T10:22:45.430Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

Sightings

Author	Source	Type	Date	Other

Nomenclature

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Confirmed: The vulnerability has been validated from an analyst's perspective.
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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.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
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GHSA-X75F-RQ9R-QMQ7

CVE-2026-97928 (GCVE-0-2026-97928)

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