CVE-2026-63848 (GCVE-0-2026-63848)
Vulnerability from cvelistv5
Published
2026-07-19 14:04
Modified
2026-08-05 12:36
Severity ?
7.8 (High) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Summary
In the Linux kernel, the following vulnerability has been resolved: drm/amdgpu/jpeg: set no_user_fence for JPEG v2.0 ring JPEG rings do not support 64-bit user fence writes, reject CS submissions with user fences. (cherry picked from commit 96179da0c6b059eb31706a0abe8dd6381c533143)
References
Impacted products
Vendor Product Version
Linux Linux Version: 6ac27241106bc946bd50032f4cd96899c6a6fe69
Version: 6ac27241106bc946bd50032f4cd96899c6a6fe69
Version: 6ac27241106bc946bd50032f4cd96899c6a6fe69
Version: 6ac27241106bc946bd50032f4cd96899c6a6fe69
Version: 6ac27241106bc946bd50032f4cd96899c6a6fe69
 Create a notification for this product.
Show details on NVD website

To clipboard 

{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/gpu/drm/amd/amdgpu/jpeg_v2_0.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "f675801889b265634aefd30aa4503fc2b9e6ce1c",
              "status": "affected",
              "version": "6ac27241106bc946bd50032f4cd96899c6a6fe69",
              "versionType": "git"
            },
            {
              "lessThan": "2e216c2ff159b2eb1da6e9c716d727efc73c64b5",
              "status": "affected",
              "version": "6ac27241106bc946bd50032f4cd96899c6a6fe69",
              "versionType": "git"
            },
            {
              "lessThan": "b41248d1c18384835f6532e68592ee07605da283",
              "status": "affected",
              "version": "6ac27241106bc946bd50032f4cd96899c6a6fe69",
              "versionType": "git"
            },
            {
              "lessThan": "41c4f3f68a343d62bd352a95ace93a11c4ad92ed",
              "status": "affected",
              "version": "6ac27241106bc946bd50032f4cd96899c6a6fe69",
              "versionType": "git"
            },
            {
              "lessThan": "e5f612dc91650561fe2b5b76dd6d2898ec9ad480",
              "status": "affected",
              "version": "6ac27241106bc946bd50032f4cd96899c6a6fe69",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/gpu/drm/amd/amdgpu/jpeg_v2_0.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "5.6"
            },
            {
              "lessThan": "5.6",
              "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": "5.6",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.12.91",
                  "versionStartIncluding": "5.6",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.18.33",
                  "versionStartIncluding": "5.6",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.0.10",
                  "versionStartIncluding": "5.6",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.1",
                  "versionStartIncluding": "5.6",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/amdgpu/jpeg: set no_user_fence for JPEG v2.0 ring\n\nJPEG rings do not support 64-bit user fence writes, reject CS\nsubmissions with user fences.\n\n(cherry picked from commit 96179da0c6b059eb31706a0abe8dd6381c533143)"
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "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 v2.0 decode ring (AMDGPU_HW_IP_VCN_JPEG).\nAC:L - On affected VCN 2.0.x hardware with JPEG v2.0 (e.g. Navi/Vega20), 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, so any unprivileged local user with render-node access (typically render/video group membership) can reach the vulnerable path without root or init-namespace capabilities.\nUI:N - Exploitation requires only programmatic ioctl submission by the attacker; no victim interaction such as opening files, mounting filesystems, or clicking prompts is needed.\nS:U - The flaw enables GPU-initiated memory corruption within the attacker\u0027s own AMDGPU context/VM via the render node, which is a standard local kernel/GPU-driver privilege boundary rather than a cross-authority escape such as VM guest-to-host or IOMMU bypass.\nC:H - Submitting a 64-bit user fence to a JPEG ring that only supports 32-bit fence writes causes the hardware to perform misdirected or out-of-bounds GPU memory writes, providing a memory-corruption primitive that can be leveraged for information disclosure.\nI:H - The unsupported fence write gives the attacker a GPU-initiated arbitrary-write primitive at attacker-chosen GPU virtual addresses within their VM mappings, which is memory corruption exploitable for further integrity compromise or code execution.\nA:H - Incorrect fence handling on the JPEG decode ring can hang or fault the GPU, trigger driver error-recovery paths, and cause system-wide graphics disruption or kernel oops, constituting high availability impact."
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-08-05T12:36:26.280Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/f675801889b265634aefd30aa4503fc2b9e6ce1c"
        },
        {
          "url": "https://git.kernel.org/stable/c/2e216c2ff159b2eb1da6e9c716d727efc73c64b5"
        },
        {
          "url": "https://git.kernel.org/stable/c/b41248d1c18384835f6532e68592ee07605da283"
        },
        {
          "url": "https://git.kernel.org/stable/c/41c4f3f68a343d62bd352a95ace93a11c4ad92ed"
        },
        {
          "url": "https://git.kernel.org/stable/c/e5f612dc91650561fe2b5b76dd6d2898ec9ad480"
        }
      ],
      "title": "drm/amdgpu/jpeg: set no_user_fence for JPEG v2.0 ring",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-63848",
    "datePublished": "2026-07-19T14:04:40.798Z",
    "dateReserved": "2026-07-19T07:54:57.016Z",
    "dateUpdated": "2026-08-05T12:36:26.280Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}


Log in or create an account to share your comment.




Tags
Taxonomy of the tags.




Sightings

Author Source Type Date

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
  • Confirmed: The vulnerability is confirmed from an analyst perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
  • Patched: This vulnerability was successfully patched by the user reporting the sighting.
  • Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
  • Not confirmed: The user expresses doubt about the veracity of the vulnerability.
  • Not patched: This vulnerability was not successfully patched by the user reporting the sighting.