CVE-2026-63847 (GCVE-0-2026-63847)

Vulnerability from cvelistv5 – Published: 2026-07-19 14:04 – Updated: 2026-08-05 12:36
VLAI
Title
drm/amdgpu/jpeg: set no_user_fence for JPEG v2.5 ring
Summary
In the Linux kernel, the following vulnerability has been resolved: drm/amdgpu/jpeg: set no_user_fence for JPEG v2.5 ring JPEG rings do not support 64-bit user fence writes, reject CS submissions with user fences. (cherry picked from commit 3216a7f4e2642bda5fd14f57586e835ae9202587)
Severity
7.8 (High)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: 14f43e8f88c57bbeaed3d05f13efab733f5e2338 , < 63691e396105611173072ad548fc2b68831ecf23 (git)
Affected: 14f43e8f88c57bbeaed3d05f13efab733f5e2338 , < 4d96e3cbfc66e4d66ea0096bde858e28ab62da00 (git)
Affected: 14f43e8f88c57bbeaed3d05f13efab733f5e2338 , < 3a96fee676fc0caf08f03ad915bec6fcd144d551 (git)
Affected: 14f43e8f88c57bbeaed3d05f13efab733f5e2338 , < 694fe016969c5e5a24b9e0ef7c1307eedec8ddf8 (git)
Affected: 14f43e8f88c57bbeaed3d05f13efab733f5e2338 , < 79405e774ede411c6b47ed41c651e40b92de64a2 (git)
guessed Create a notification for this product.
Linux Linux Affected: 5.6
Unaffected: 0 , < 5.6 (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)
guessed Create a notification for this product.
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{
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      "affected": [
        {
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          "product": "Linux",
          "programFiles": [
            "drivers/gpu/drm/amd/amdgpu/jpeg_v2_5.c"
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              "version": "0",
              "versionType": "semver"
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              "versionType": "semver"
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              "versionType": "semver"
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              "version": "7.0.10",
              "versionType": "semver"
            },
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              "status": "unaffected",
              "version": "7.1",
              "versionType": "original_commit_for_fix"
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        }
      ],
      "cpeApplicability": [
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                  "versionStartIncluding": "5.6",
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                  "versionEndExcluding": "6.12.91",
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              "negate": false,
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      "descriptions": [
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          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/amdgpu/jpeg: set no_user_fence for JPEG v2.5 ring\n\nJPEG rings do not support 64-bit user fence writes, reject CS\nsubmissions with user fences.\n\n(cherry picked from commit 3216a7f4e2642bda5fd14f57586e835ae9202587)"
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            "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"
          },
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              "value": "AV:L - Exploitation requires issuing DRM_IOCTL_AMDGPU_CS against /dev/dri/renderD* on a system with an affected AMD Instinct GPU (MI100/MI200); this is a local ioctl path, not reachable over the network.\nAC:L - An attacker with render-node access can deterministically submit a JPEG-ring command buffer (AMDGPU_HW_IP_VCN_JPEG) with an AMDGPU_CHUNK_ID_FENCE chunk; no race or special system state is required beyond the vulnerable hardware being present.\nPR:L - The amdgpu_cs_ioctl entry point requires only DRM render-client access (DRM_AUTH|DRM_RENDER_ALLOW), which is granted to unprivileged local users in the render/video group or cloud GPU tenants with device access\u2014not root or CAP_SYS_ADMIN.\nUI:N - Exploitation is fully programmatic via ioctl submission and does not require any action from another user or administrator.\nS:U - The corrupting GPU fence write is issued within the attacker\u0027s own DRM/GPU context and VM; impact remains within the same security authority and does not constitute a demonstrated VM escape or IOMMU boundary bypass.\nC:H - The malformed 64-bit user fence write on unsupported JPEG hardware causes GPU-initiated memory corruption at an attacker-chosen address, which can be leveraged for arbitrary memory disclosure beyond a bounded leak.\nI:H - The vulnerability gives the attacker a GPU DMA write primitive to user-specified GPU-mapped memory, enabling arbitrary data modification and potential further exploitation such as privilege escalation.\nA:H - Triggering an unsupported 64-bit fence operation on the JPEG engine can cause GPU faults, driver hangs, or kernel oops/panic, impacting system availability."
            }
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      "providerMetadata": {
        "dateUpdated": "2026-08-05T12:36:25.201Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
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        },
        {
          "url": "https://git.kernel.org/stable/c/79405e774ede411c6b47ed41c651e40b92de64a2"
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      ],
      "title": "drm/amdgpu/jpeg: set no_user_fence for JPEG v2.5 ring",
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    "datePublished": "2026-07-19T14:04:40.248Z",
    "dateReserved": "2026-07-19T07:54:57.016Z",
    "dateUpdated": "2026-08-05T12:36:25.201Z",
    "state": "PUBLISHED"
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                "confidentialityImpact": "HIGH",
                "integrityImpact": "HIGH",
                "privilegesRequired": "LOW",
                "scope": "UNCHANGED",
                "userInteraction": "NONE",
                "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
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      "current_release_date": "2026-07-31T19:39:09+00:00",
      "cve": "CVE-2026-63847",
      "id": "CVE-2026-63847",
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      "product_status:known_affected": "198",
      "product_status:known_not_affected": "76",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: drm/amdgpu/jpeg: set no_user_fence for JPEG v2.5 ring",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-63847.json",
      "version": "3"
    },
    "suse_vex": {
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      "current_release_date": "2026-09-18T00:47:38Z",
      "cve": "CVE-2026-63847",
      "id": "CVE-2026-63847",
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      "product_status:recommended": "250",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2026-63847",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2026-63847.json",
      "version": "9"
    }
  }
}



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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

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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.


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