Vulnerability-Lookup

GHSA-JXFV-759V-W83R

Vulnerability from github – Published: 2026-08-10 15:33 – Updated: 2026-08-19 18:32

Details

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

drm/amdgpu: fix division by zero with invalid uvd dimensions

When width or height is less than 16, width_in_mb or height_in_mb becomes 0, leading to fs_in_mb being 0. This causes a division by zero when calculating num_dpb_buffer in H264 and H264 Perf decode paths.

Add validation to reject frames with width < 16 or height < 16 before performing any calculations that depend on these values.

V2: Format change - move up all vaiable definitions. V3: Use warn_once to avoid spam.

(cherry picked from commit 3e41d26c70b0a459d041cc19482a226c4b7423cb)

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-2026-68106"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-08-10T13:19:55Z",
    "severity": "HIGH"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/amdgpu: fix division by zero with invalid uvd dimensions\n\nWhen width or height is less than 16, width_in_mb or height_in_mb\nbecomes 0, leading to fs_in_mb being 0. This causes a division by\nzero when calculating num_dpb_buffer in H264 and H264 Perf decode\npaths.\n\nAdd validation to reject frames with width \u003c 16 or height \u003c 16\nbefore performing any calculations that depend on these values.\n\nV2: Format change - move up all vaiable definitions.\nV3: Use warn_once to avoid spam.\n\n(cherry picked from commit 3e41d26c70b0a459d041cc19482a226c4b7423cb)",
  "id": "GHSA-jxfv-759v-w83r",
  "modified": "2026-08-19T18:32:05Z",
  "published": "2026-08-10T15:33:36Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-68106"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/004d0453cfef16f056cb7b8bc04f69f19cf9df32"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/00ee64910ecf748cc15b23bbcbea472c203ec1e8"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/0c01c811be47e6b146552dd59bfedbea8f09b8f4"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/52f9a588296432accf2982f7d258192a37562f4f"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/81c9b4921f62d1642b9d775524ae9240e521a5ed"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/a00946b5ab7c25da5685ca9c58f50ff6f43c0fdf"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/be725ab23aa45c11a5afef3e2a9f6d8c084ae5dc"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/ffb33d466a68cea3e8a3dbed04d79037a3cbabd1"
    }
  ],
  "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-2026-68106 (GCVE-0-2026-68106)

Vulnerability from cvelistv5 – Published: 2026-08-10 11:58 – Updated: 2026-08-19 16:29

Title

drm/amdgpu: fix division by zero with invalid uvd dimensions

Summary

In the Linux kernel, the following vulnerability has been resolved: drm/amdgpu: fix division by zero with invalid uvd dimensions When width or height is less than 16, width_in_mb or height_in_mb becomes 0, leading to fs_in_mb being 0. This causes a division by zero when calculating num_dpb_buffer in H264 and H264 Perf decode paths. Add validation to reject frames with width < 16 or height < 16 before performing any calculations that depend on these values. V2: Format change - move up all vaiable definitions. V3: Use warn_once to avoid spam. (cherry picked from commit 3e41d26c70b0a459d041cc19482a226c4b7423cb)

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

8 references

URL	Tags
https://git.kernel.org/stable/c/004d0453cfef16f05…
https://git.kernel.org/stable/c/00ee64910ecf748cc…
https://git.kernel.org/stable/c/81c9b4921f62d1642…
https://git.kernel.org/stable/c/52f9a588296432acc…
https://git.kernel.org/stable/c/a00946b5ab7c25da5…
https://git.kernel.org/stable/c/ffb33d466a68cea3e…
https://git.kernel.org/stable/c/be725ab23aa45c11a…
https://git.kernel.org/stable/c/0c01c811be47e6b14…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: d38ceaf99ed015f2a0b9af3499791bd3a3daae21 , < 004d0453cfef16f056cb7b8bc04f69f19cf9df32 (git) Affected: d38ceaf99ed015f2a0b9af3499791bd3a3daae21 , < 00ee64910ecf748cc15b23bbcbea472c203ec1e8 (git) Affected: d38ceaf99ed015f2a0b9af3499791bd3a3daae21 , < 81c9b4921f62d1642b9d775524ae9240e521a5ed (git) Affected: d38ceaf99ed015f2a0b9af3499791bd3a3daae21 , < 52f9a588296432accf2982f7d258192a37562f4f (git) Affected: d38ceaf99ed015f2a0b9af3499791bd3a3daae21 , < a00946b5ab7c25da5685ca9c58f50ff6f43c0fdf (git) Affected: d38ceaf99ed015f2a0b9af3499791bd3a3daae21 , < ffb33d466a68cea3e8a3dbed04d79037a3cbabd1 (git) Affected: d38ceaf99ed015f2a0b9af3499791bd3a3daae21 , < be725ab23aa45c11a5afef3e2a9f6d8c084ae5dc (git) Affected: d38ceaf99ed015f2a0b9af3499791bd3a3daae21 , < 0c01c811be47e6b146552dd59bfedbea8f09b8f4 (git)
Linux	Linux	Affected: 4.2 Unaffected: 0 , < 4.2 (semver) Unaffected: 5.10.265 , ≤ 5.10.* (semver) Unaffected: 5.15.216 , ≤ 5.15.* (semver) Unaffected: 6.1.183 , ≤ 6.1.* (semver) Unaffected: 6.6.148 , ≤ 6.6.* (semver) Unaffected: 6.12.101 , ≤ 6.12.* (semver) Unaffected: 6.18.42 , ≤ 6.18.* (semver) Unaffected: 7.1.6 , ≤ 7.1.* (semver) Unaffected: 7.2 , ≤ * (original_commit_for_fix)

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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/gpu/drm/amd/amdgpu/amdgpu_uvd.c"
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            },
            {
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              "status": "affected",
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              "versionType": "git"
            },
            {
              "lessThan": "81c9b4921f62d1642b9d775524ae9240e521a5ed",
              "status": "affected",
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            {
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              "versionType": "git"
            },
            {
              "lessThan": "a00946b5ab7c25da5685ca9c58f50ff6f43c0fdf",
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            {
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              "versionType": "git"
            },
            {
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          "vendor": "Linux",
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            {
              "status": "affected",
              "version": "4.2"
            },
            {
              "lessThan": "4.2",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
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            {
              "lessThanOrEqual": "5.10.*",
              "status": "unaffected",
              "version": "5.10.265",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.15.*",
              "status": "unaffected",
              "version": "5.15.216",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.183",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.148",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.101",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.42",
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            },
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              "lessThanOrEqual": "7.1.*",
              "status": "unaffected",
              "version": "7.1.6",
              "versionType": "semver"
            },
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              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.2",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
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                  "versionStartIncluding": "4.2",
                  "vulnerable": true
                },
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                },
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                },
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                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.1.6",
                  "versionStartIncluding": "4.2",
                  "vulnerable": true
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                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.2",
                  "versionStartIncluding": "4.2",
                  "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: fix division by zero with invalid uvd dimensions\n\nWhen width or height is less than 16, width_in_mb or height_in_mb\nbecomes 0, leading to fs_in_mb being 0. This causes a division by\nzero when calculating num_dpb_buffer in H264 and H264 Perf decode\npaths.\n\nAdd validation to reject frames with width \u003c 16 or height \u003c 16\nbefore performing any calculations that depend on these values.\n\nV2: Format change - move up all vaiable definitions.\nV3: Use warn_once to avoid spam.\n\n(cherry picked from commit 3e41d26c70b0a459d041cc19482a226c4b7423cb)"
        }
      ],
      "metrics": [
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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"
          },
          "scenarios": [
            {
              "lang": "en",
              "value": "AV:L - The flaw is reached only via the AMDGPU_CS DRM ioctl on a local render node (/dev/dri/renderD*), traversing amdgpu_cs_ioctl, amdgpu_cs_patch_ibs, amdgpu_uvd_ring_parse_cs, and amdgpu_uvd_cs_msg_decode; it is not reachable from any network-facing kernel service.\nAC:L - An attacker with render-node access fully controls the UVD decode message fields (stream_type H264/H264 Perf, width, height, level) in their own BO and can reliably trigger width or height \u003c 16 after creating a valid UVD session handle.\nPR:L - Exploitation requires only standard unprivileged local access to the AMDGPU DRM render node (DRM_AUTH|DRM_RENDER_ALLOW on AMDGPU_CS), not root or capabilities outside the render/video group; user namespaces do not grant this access by themselves.\nUI:N - No victim interaction is required; a local attacker can directly submit a crafted UVD command stream through AMDGPU_CS ioctl without needing another user to open media, mount a filesystem, or take any other action.\nS:U - Impact is confined to the kernel/GPU driver security domain on the local host (kernel oops or GPU memory corruption within the attacker\u0027s DRM client); it does not cross VM, IOMMU, or sandbox boundaries to affect a different security authority.\nC:H - On x86, kernel-mode divide-by-zero causes a fatal trap; on architectures where unsigned division by zero returns zero, underestimated DPB buffer sizes can pass validation, enabling GPU out-of-bounds reads of adjacent mapped buffers that may hold sensitive data.\nI:H - Underestimated buffer-size calculations from zero macroblock counts can let undersized DPB buffers pass kernel validation, permitting the UVD engine to perform out-of-bounds writes into adjacent GPU-mapped memory that could be leveraged for further memory corruption.\nA:H - Triggering the divide-by-zero in kernel context during CS parsing causes an x86 divide-error exception leading to die()/kernel oops, crashing or hanging the system; repeated submissions can deny GPU/video availability on affected UVD hardware (v3.1-v6.0)."
            }
          ]
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      ],
      "providerMetadata": {
        "dateUpdated": "2026-08-19T16:29:19.954Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
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          "url": "https://git.kernel.org/stable/c/be725ab23aa45c11a5afef3e2a9f6d8c084ae5dc"
        },
        {
          "url": "https://git.kernel.org/stable/c/0c01c811be47e6b146552dd59bfedbea8f09b8f4"
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      "title": "drm/amdgpu: fix division by zero with invalid uvd dimensions",
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        "engine": "bippy-1.2.0"
      }
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  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-68106",
    "datePublished": "2026-08-10T11:58:23.108Z",
    "dateReserved": "2026-07-30T09:28:09.368Z",
    "dateUpdated": "2026-08-19T16:29:19.954Z",
    "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.

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-JXFV-759V-W83R

CVE-2026-68106 (GCVE-0-2026-68106)

Tags

Sightings

Nomenclature