CVE-2026-64153 (GCVE-0-2026-64153)
Vulnerability from cvelistv5
Published
2026-07-19 15:40
Modified
2026-08-05 12:39
Severity ?
8.8 (High) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
Summary
In the Linux kernel, the following vulnerability has been resolved: drm/msm: Fix iommu_map_sgtable() return value check and avoid WARN Commit "iommu: return full error code from iommu_map_sg[_atomic]()" changed iommu_map_sgtable() to return an ssize_t and negative values in error cases, rather than a size_t and a zero. Store the return value in the appropriate type and in case of error, return it rather than WARNing. Patchwork: https://patchwork.freedesktop.org/patch/719685/
References
Impacted products
Vendor Product Version
Linux Linux Version: ad8f36e4b6b1c826a0daa5fda2c5839205b5aa8b
Version: ad8f36e4b6b1c826a0daa5fda2c5839205b5aa8b
Version: ad8f36e4b6b1c826a0daa5fda2c5839205b5aa8b
Version: ad8f36e4b6b1c826a0daa5fda2c5839205b5aa8b
Version: ad8f36e4b6b1c826a0daa5fda2c5839205b5aa8b
Version: ad8f36e4b6b1c826a0daa5fda2c5839205b5aa8b
Version: ad8f36e4b6b1c826a0daa5fda2c5839205b5aa8b
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{
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          "product": "Linux",
          "programFiles": [
            "drivers/gpu/drm/msm/msm_iommu.c"
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              "version": "7.0.11",
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              "status": "unaffected",
              "version": "7.1",
              "versionType": "original_commit_for_fix"
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        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
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              "cpeMatch": [
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              "operator": "OR"
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      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/msm: Fix iommu_map_sgtable() return value check and avoid WARN\n\nCommit \"iommu: return full error code from iommu_map_sg[_atomic]()\"\nchanged iommu_map_sgtable() to return an ssize_t and negative values\nin error cases, rather than a size_t and a zero.\n\nStore the return value in the appropriate type and in case of error,\nreturn it rather than WARNing.\n\nPatchwork: https://patchwork.freedesktop.org/patch/719685/"
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "baseScore": 8.8,
            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H",
            "version": "3.1"
          },
          "scenarios": [
            {
              "lang": "en",
              "value": "AV:L - The bug is reached only through local DRM interfaces on Qualcomm devices: MSM_GEM_SUBMIT and framebuffer/atomic display commits pin GEM buffers into the display or legacy kernel-managed GPU IOMMU domain via ioctl on /dev/dri/renderD* or /dev/dri/card*.\nAC:L - An attacker can reliably force iommu_map_sgtable() failures by exhausting IOMMU page-table space or memory through repeated GEM allocations and mapping operations they fully control, without depending on victim timing or uncontrollable layout.\nPR:L - Exploitation requires only unprivileged access to the DRM render/display node (DRM_RENDER_ALLOW ioctls); on Android phones any app with GPU access can trigger the mapping path without root or special capabilities.\nUI:N - No victim interaction is required beyond the attacker\u0027s own DRM/GPU or framebuffer operations; the vulnerable msm_iommu_map() runs during their own buffer pin/map requests.\nS:C - Incorrect handling of IOMMU mapping errors can leave the display engine or Adreno GPU operating on IOVAs without the intended translation, crossing the IOMMU/DMA security boundary between device DMA and system physical memory.\nC:H - If a failed IOMMU mapping is treated as successful, GPU or display DMA can read physical pages outside the intended buffer, enabling arbitrary physical memory disclosure; this is the same error-sign-conversion class that caused silent mapping failure in the parallel tegra fix.\nI:H - A successful-but-unmapped or mis-mapped IOVA lets the GPU (IOMMU_WRITE on typical buffers) or display write-back path corrupt physical memory outside the caller\u0027s GEM object, providing a DMA-based write primitive.\nA:H - Repeated IOMMU mapping failures mishandled on the display or GPU path can cause IOMMU fault storms, GPU hangs, display pipeline stalls, or kernel WARN/oops conditions during fault handling."
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-08-05T12:39:48.053Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/3c2cdb7c07f664b77e2a75b50793b845d5742efa"
        },
        {
          "url": "https://git.kernel.org/stable/c/3e3c3c95ef4fe17231a9149e27bcfc9dae2dd89f"
        },
        {
          "url": "https://git.kernel.org/stable/c/7256e54583aee21e23929e7554278c2f5c1a08b1"
        },
        {
          "url": "https://git.kernel.org/stable/c/3457807aeb88077712f0a7cb65c3ca5120773d75"
        },
        {
          "url": "https://git.kernel.org/stable/c/f4e37f3df436c2bdd2621c21f9c72c8f149a221d"
        },
        {
          "url": "https://git.kernel.org/stable/c/3a45af37733446e114bf19b0209fe7d8089bdb8b"
        },
        {
          "url": "https://git.kernel.org/stable/c/55e0f0d1c1a4ee1e46da7da4d443eb3044fb3851"
        }
      ],
      "title": "drm/msm: Fix iommu_map_sgtable() return value check and avoid WARN",
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  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-64153",
    "datePublished": "2026-07-19T15:40:42.102Z",
    "dateReserved": "2026-07-19T07:54:57.038Z",
    "dateUpdated": "2026-08-05T12:39:48.053Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}


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