FKIE_CVE-2026-74453

Vulnerability from fkie_nvd - Published: 2026-08-15 13:17 - Updated: 2026-08-19 17:21
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/vc4: Zero the tile state data array before each BIN job The binner BO is a single 16MB buffer split into 512KB slots that are handed out to jobs at submission time and recycled as jobs complete, without ever being cleared. Each slot holds the job's Tile State Data Array (TSDA) at its start, followed by the tile allocation pool. While the tile allocation pool is only walked by the render thread through branches the binner generated during the current job, the TSDA is the PTB's own per-tile bookkeeping and is consumed by the hardware itself. Although the kernel sets the "Auto-initialise Tile State Data Array" flag in the tile binning mode configuration, the PTB demonstrably still acts on stale tile state left by the slot's previous user: the binner ends up creating invalid command streams with invalid primitive streams and branches, which can cause GPU hangs as observed in [1][2]. Zero the TSDA when the job's binning slot is configured. This clears 48 bytes per tile (~24KB for a 1080p frame) in the submission path, and guarantees the PTB never sees another job's tile state. The tile count is only checked for being non-zero today, so the 8-bit fields it comes from can describe a tile state array almost six times larger than the slot it has to live in. Bound it before the slot is handed out, since such size decides how much of the slot is left for the tile alloc pool.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/0e858422df2334165293ea742da9fbb2e51f2739
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/48a570c964d8e37d353381e4195106277e17f5cb
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/57667eb7548faaac396c6e39f3b4444dab5b097c
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/a75c8f365e209aa9bb927b0942a7840152d44892
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/c5d8e8e1a8e3b4e464683c5a8a869c16a6382fea
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/c8dea7e7c6098e383e44f21a64d0431da5480e3f
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/d3677372e0275e139f0efd2872c5a524b5d12868
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/f5802be65535f8818af7191159cf8c11f48ab2a2
Impacted products
Vendor Product Version
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/gpu/drm/vc4/vc4_validate.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "c5d8e8e1a8e3b4e464683c5a8a869c16a6382fea",
              "status": "affected",
              "version": "553c942f8b2cbc7394b4d4fa2f848b23a8f07451",
              "versionType": "git"
            },
            {
              "lessThan": "d3677372e0275e139f0efd2872c5a524b5d12868",
              "status": "affected",
              "version": "553c942f8b2cbc7394b4d4fa2f848b23a8f07451",
              "versionType": "git"
            },
            {
              "lessThan": "c8dea7e7c6098e383e44f21a64d0431da5480e3f",
              "status": "affected",
              "version": "553c942f8b2cbc7394b4d4fa2f848b23a8f07451",
              "versionType": "git"
            },
            {
              "lessThan": "f5802be65535f8818af7191159cf8c11f48ab2a2",
              "status": "affected",
              "version": "553c942f8b2cbc7394b4d4fa2f848b23a8f07451",
              "versionType": "git"
            },
            {
              "lessThan": "0e858422df2334165293ea742da9fbb2e51f2739",
              "status": "affected",
              "version": "553c942f8b2cbc7394b4d4fa2f848b23a8f07451",
              "versionType": "git"
            },
            {
              "lessThan": "57667eb7548faaac396c6e39f3b4444dab5b097c",
              "status": "affected",
              "version": "553c942f8b2cbc7394b4d4fa2f848b23a8f07451",
              "versionType": "git"
            },
            {
              "lessThan": "a75c8f365e209aa9bb927b0942a7840152d44892",
              "status": "affected",
              "version": "553c942f8b2cbc7394b4d4fa2f848b23a8f07451",
              "versionType": "git"
            },
            {
              "lessThan": "48a570c964d8e37d353381e4195106277e17f5cb",
              "status": "affected",
              "version": "553c942f8b2cbc7394b4d4fa2f848b23a8f07451",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/gpu/drm/vc4/vc4_validate.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "4.13"
            },
            {
              "lessThan": "4.13",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "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": "6.6.151",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.103",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.44",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.1.*",
              "status": "unaffected",
              "version": "7.1.8",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.2",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/vc4: Zero the tile state data array before each BIN job\n\nThe binner BO is a single 16MB buffer split into 512KB slots that are\nhanded out to jobs at submission time and recycled as jobs complete,\nwithout ever being cleared. Each slot holds the job\u0027s Tile State Data\nArray (TSDA) at its start, followed by the tile allocation pool.\n\nWhile the tile allocation pool is only walked by the render thread\nthrough branches the binner generated during the current job, the\nTSDA is the PTB\u0027s own per-tile bookkeeping and is consumed by the\nhardware itself. Although the kernel sets the \"Auto-initialise Tile\nState Data Array\" flag in the tile binning mode configuration, the\nPTB demonstrably still acts on stale tile state left by the slot\u0027s\nprevious user: the binner ends up creating invalid command streams\nwith invalid primitive streams and branches, which can cause GPU hangs\nas observed in [1][2].\n\nZero the TSDA when the job\u0027s binning slot is configured. This clears\n48 bytes per tile (~24KB for a 1080p frame) in the submission path, and\nguarantees the PTB never sees another job\u0027s tile state.\n\nThe tile count is only checked for being non-zero today, so the 8-bit\nfields it comes from can describe a tile state array almost six times\nlarger than the slot it has to live in. Bound it before the slot is\nhanded out, since such size decides how much of the slot is left for\nthe tile alloc pool."
    }
  ],
  "id": "CVE-2026-74453",
  "lastModified": "2026-08-19T17:21:01.953",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "LOCAL",
          "availabilityImpact": "HIGH",
          "baseScore": 7.8,
          "baseSeverity": "HIGH",
          "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",
          "version": "3.1"
        },
        "exploitabilityScore": 1.8,
        "impactScore": 5.9,
        "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "type": "Secondary"
      }
    ]
  },
  "published": "2026-08-15T13:17:49.893",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/0e858422df2334165293ea742da9fbb2e51f2739"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/48a570c964d8e37d353381e4195106277e17f5cb"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/57667eb7548faaac396c6e39f3b4444dab5b097c"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/a75c8f365e209aa9bb927b0942a7840152d44892"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/c5d8e8e1a8e3b4e464683c5a8a869c16a6382fea"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/c8dea7e7c6098e383e44f21a64d0431da5480e3f"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/d3677372e0275e139f0efd2872c5a524b5d12868"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/f5802be65535f8818af7191159cf8c11f48ab2a2"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Received"
}



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