Vulnerability-Lookup

GHSA-85MJ-CVF7-W5V9

Vulnerability from github – Published: 2026-07-19 15:30 – Updated: 2026-07-20 15:31

Details

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

drm/amdgpu/jpeg: set no_user_fence for JPEG v3.0 ring

JPEG rings do not support 64-bit user fence writes, reject CS submissions with user fences.

(cherry picked from commit 4d7d774f100efb5089c86a1fb8c5bf47c63fc9ef)

Severity

7.8 (High)


                  
                    CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

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{
  "affected": [],
  "aliases": [
    "CVE-2026-63846"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-07-19T15:16:51Z",
    "severity": "HIGH"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/amdgpu/jpeg: set no_user_fence for JPEG v3.0 ring\n\nJPEG rings do not support 64-bit user fence writes, reject CS\nsubmissions with user fences.\n\n(cherry picked from commit 4d7d774f100efb5089c86a1fb8c5bf47c63fc9ef)",
  "id": "GHSA-85mj-cvf7-w5v9",
  "modified": "2026-07-20T15:31:47Z",
  "published": "2026-07-19T15:30:26Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-63846"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/303da8279f195cc741adc52c1b44d6b64de63bb0"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/48ce00787e3fddd2b45692fc991b8ab128343da5"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/5ada37d7f736f9feeaa06a25e470a4c74e67a61a"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/a2baf12eec41f246689e6a3f8619af1200031576"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/ee035a9d3eed3a9f5a3e83c31a10b321c9598861"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ]
}

CVE-2026-63846 (GCVE-0-2026-63846)

Vulnerability from cvelistv5 – Published: 2026-07-19 14:04 – Updated: 2026-08-05 12:36

Title

drm/amdgpu/jpeg: set no_user_fence for JPEG v3.0 ring

Summary

In the Linux kernel, the following vulnerability has been resolved: drm/amdgpu/jpeg: set no_user_fence for JPEG v3.0 ring JPEG rings do not support 64-bit user fence writes, reject CS submissions with user fences. (cherry picked from commit 4d7d774f100efb5089c86a1fb8c5bf47c63fc9ef)

Severity

7.8 (High)


                        
                          CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Assigner

Linux mitre root

References

5 references

URL	Tags
https://git.kernel.org/stable/c/ee035a9d3eed3a9f5…
https://git.kernel.org/stable/c/303da8279f195cc74…
https://git.kernel.org/stable/c/5ada37d7f736f9fee…
https://git.kernel.org/stable/c/48ce00787e3fddd2b…
https://git.kernel.org/stable/c/a2baf12eec41f2466…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: dfd57dbf44ddc70c90c76f83b2deb46e5dd40ce3 , < ee035a9d3eed3a9f5a3e83c31a10b321c9598861 (git) Affected: dfd57dbf44ddc70c90c76f83b2deb46e5dd40ce3 , < 303da8279f195cc741adc52c1b44d6b64de63bb0 (git) Affected: dfd57dbf44ddc70c90c76f83b2deb46e5dd40ce3 , < 5ada37d7f736f9feeaa06a25e470a4c74e67a61a (git) Affected: dfd57dbf44ddc70c90c76f83b2deb46e5dd40ce3 , < 48ce00787e3fddd2b45692fc991b8ab128343da5 (git) Affected: dfd57dbf44ddc70c90c76f83b2deb46e5dd40ce3 , < a2baf12eec41f246689e6a3f8619af1200031576 (git)
Linux	Linux	Affected: 5.9 Unaffected: 0 , < 5.9 (semver) Unaffected: 6.6.141 , ≤ 6.6.* (semver) Unaffected: 6.12.91 , ≤ 6.12.* (semver) Unaffected: 6.18.33 , ≤ 6.18.* (semver) Unaffected: 7.0.10 , ≤ 7.0.* (semver) Unaffected: 7.1 , ≤ * (original_commit_for_fix)

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JSON

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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/gpu/drm/amd/amdgpu/jpeg_v3_0.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "ee035a9d3eed3a9f5a3e83c31a10b321c9598861",
              "status": "affected",
              "version": "dfd57dbf44ddc70c90c76f83b2deb46e5dd40ce3",
              "versionType": "git"
            },
            {
              "lessThan": "303da8279f195cc741adc52c1b44d6b64de63bb0",
              "status": "affected",
              "version": "dfd57dbf44ddc70c90c76f83b2deb46e5dd40ce3",
              "versionType": "git"
            },
            {
              "lessThan": "5ada37d7f736f9feeaa06a25e470a4c74e67a61a",
              "status": "affected",
              "version": "dfd57dbf44ddc70c90c76f83b2deb46e5dd40ce3",
              "versionType": "git"
            },
            {
              "lessThan": "48ce00787e3fddd2b45692fc991b8ab128343da5",
              "status": "affected",
              "version": "dfd57dbf44ddc70c90c76f83b2deb46e5dd40ce3",
              "versionType": "git"
            },
            {
              "lessThan": "a2baf12eec41f246689e6a3f8619af1200031576",
              "status": "affected",
              "version": "dfd57dbf44ddc70c90c76f83b2deb46e5dd40ce3",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/gpu/drm/amd/amdgpu/jpeg_v3_0.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "5.9"
            },
            {
              "lessThan": "5.9",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.141",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.91",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.33",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.0.*",
              "status": "unaffected",
              "version": "7.0.10",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.1",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.6.141",
                  "versionStartIncluding": "5.9",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.12.91",
                  "versionStartIncluding": "5.9",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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                  "versionStartIncluding": "5.9",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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                  "versionStartIncluding": "5.9",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.1",
                  "versionStartIncluding": "5.9",
                  "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/jpeg: set no_user_fence for JPEG v3.0 ring\n\nJPEG rings do not support 64-bit user fence writes, reject CS\nsubmissions with user fences.\n\n(cherry picked from commit 4d7d774f100efb5089c86a1fb8c5bf47c63fc9ef)"
        }
      ],
      "metrics": [
        {
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            "baseScore": 7.8,
            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
            "version": "3.1"
          },
          "scenarios": [
            {
              "lang": "en",
              "value": "AV:L - The vulnerable code is reached only through DRM_IOCTL_AMDGPU_CS on an AMDGPU render node (/dev/dri/renderD*), requiring a local ioctl to submit a command buffer with AMDGPU_CHUNK_ID_FENCE to the JPEG v3.0 decode ring (AMDGPU_HW_IP_VCN_JPEG).\nAC:L - On affected VCN 3.0.x hardware with JPEG v3.0 (e.g. Navi 21/Sienna_Cichlid RX 6000 series), an attacker fully controls CS submission parameters and can reliably trigger the unsupported 64-bit user fence path without races or conditions beyond attacker control.\nPR:L - DRM_IOCTL_AMDGPU_CS is gated by DRM_AUTH|DRM_RENDER_ALLOW, requiring only local access to the render node available to unprivileged users in the render group or equivalent permissions, not root or special capabilities.\nUI:N - Exploitation requires no victim interaction beyond the attacker (or their process) opening the render node and submitting crafted GPU command buffers with user fences.\nS:U - The impact is confined to the attacker\u0027s GPU security context (their process VM and GPU mappings); exploitation does not cross VM, container, or IOMMU boundaries to affect other security authorities.\nC:H - The unsupported 64-bit user fence causes the GPU to perform unintended memory writes that can corrupt adjacent GPU-accessible memory, and memory corruption primitives can be leveraged for information disclosure.\nI:H - The GPU writes a fence sequence number via GPCOM to an attacker-influenced GPU virtual address, providing a controlled write primitive that can corrupt GPU memory and potentially be chained for further exploitation.\nA:H - Malformed fence operations on unsupported hardware can hang or fault the GPU subsystem, requiring a GPU reset and denying availability of graphics/compute workloads."
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-08-05T12:36:24.131Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/ee035a9d3eed3a9f5a3e83c31a10b321c9598861"
        },
        {
          "url": "https://git.kernel.org/stable/c/303da8279f195cc741adc52c1b44d6b64de63bb0"
        },
        {
          "url": "https://git.kernel.org/stable/c/5ada37d7f736f9feeaa06a25e470a4c74e67a61a"
        },
        {
          "url": "https://git.kernel.org/stable/c/48ce00787e3fddd2b45692fc991b8ab128343da5"
        },
        {
          "url": "https://git.kernel.org/stable/c/a2baf12eec41f246689e6a3f8619af1200031576"
        }
      ],
      "title": "drm/amdgpu/jpeg: set no_user_fence for JPEG v3.0 ring",
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        "engine": "bippy-1.2.0"
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  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-63846",
    "datePublished": "2026-07-19T14:04:39.674Z",
    "dateReserved": "2026-07-19T07:54:57.016Z",
    "dateUpdated": "2026-08-05T12:36:24.131Z",
    "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.

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-85MJ-CVF7-W5V9

CVE-2026-63846 (GCVE-0-2026-63846)

Tags

Sightings

Nomenclature

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