CVE-2026-99002 (GCVE-0-2026-99002)

Vulnerability from cvelistv5 – Published: 2026-10-23 12:20 – Updated: 2026-10-24 14:09
VLAI
Title
drm/vmwgfx: validate pitch coming from userspace
Summary
In the Linux kernel, the following vulnerability has been resolved: drm/vmwgfx: validate pitch coming from userspace Validate the pitch, alongside the box dimensions before trying to copy data from the underlying surface. Fixes possible out of bounds reads with cursor snooping.
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 CNA under the mitre root
CNA scorecard D 53/100 over 7061 records in the last 180 days details
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: 2ac863719e518ae1a8f328849e64ea26a222f079 , < db6fbc2b77849e3c3c2bc115ea9ac925c4625a0d (git)
Affected: 2ac863719e518ae1a8f328849e64ea26a222f079 , < f6d9c8abdf06a9c7efa799532d66ed8d5a50734c (git)
Affected: 2ac863719e518ae1a8f328849e64ea26a222f079 , < 76e5ddd7d9822c8c3492e0f50ba8978e093069ad (git)
Affected: 2ac863719e518ae1a8f328849e64ea26a222f079 , < fcb137f6e7ed769f7ecad84364a33c451371b602 (git)
Affected: 2ac863719e518ae1a8f328849e64ea26a222f079 , < 21bc51cb89ced74d6645a138cc2f21184bc75094 (git)
guessed Create a notification for this product.
Linux Linux Affected: 3.2
Unaffected: 0 , < 3.2 (semver)
Unaffected: 6.6.160 , ≤ 6.6.* (semver)
Unaffected: 6.12.114 , ≤ 6.12.* (semver)
Unaffected: 6.18.57 , ≤ 6.18.* (semver)
Unaffected: 7.2.11 , ≤ 7.2.* (semver)
Unaffected: 7.3 , ≤ * (original_commit_for_fix)
guessed Create a notification for this product.
Show details on NVD website
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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/gpu/drm/vmwgfx/vmwgfx_cursor_plane.c"
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          "vendor": "Linux",
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              "version": "0",
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              "version": "6.6.160",
              "versionType": "semver"
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              "versionType": "semver"
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              "status": "unaffected",
              "version": "7.3",
              "versionType": "original_commit_for_fix"
            }
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      ],
      "cpeApplicability": [
        {
          "nodes": [
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      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/vmwgfx: validate pitch coming from userspace\n\nValidate the pitch, alongside the box dimensions before trying\nto copy data from the underlying surface. Fixes possible\nout of bounds reads with cursor snooping."
        }
      ],
      "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 - DRM_IOCTL_VMW_EXECBUF passes a locally supplied SVGA_3D_CMD_SURFACE_DMA through vmw_execbuf_process(), vmw_cmd_dma(), and vmw_kms_cursor_snoop(); the malformed guest.pitch and copy box originate in this ioctl, not a network protocol.\nAC:L - The attacker can create the required 64x64 A8R8G8B8 scanout surface and choose the box, pitch, and source BO. A 63x64 box with pitch 256 deterministically reaches the corrupting partial-copy loop without a race or attacker-uncontrolled condition.\nPR:L - VMW_CREATE_SURFACE, VMW_ALLOC_DMABUF, and VMW_EXECBUF are DRM_RENDER_ALLOW on a DRIVER_RENDER device; drm_ioctl_permit() therefore requires no DRM master, authentication, or capability from an unprivileged render-node client.\nUI:N - The attacker creates the surface and BO and submits the malformed DMA command through their own file descriptor; no victim must mount, open, or display anything.\nS:U - vmw_kms_cursor_snoop() corrupts the guest kernel\u0027s own cursor-snooper allocation from guest userspace. The code demonstrates neither host-memory corruption nor a guest-to-host or IOMMU-boundary escape.\nC:H - The unchecked pitch causes out-of-bounds source reads, while the attacker-controlled heap overwrite can corrupt neighboring pointer-bearing objects and be developed into arbitrary guest-kernel read primitives.\nI:H - snooper.image is a u32 pointer, but the vulnerable loop uses the 256-byte image_pitch as an element stride; a 63x64 copy writes controlled 252-byte rows at 1024-byte intervals far beyond the 16-KiB allocation, enabling control-flow hijacking.\nA:H - An excessive pitch can fault while reading beyond the TTM mapping, and the partial-copy destination bug can overwrite roughly 48 KiB beyond the snooper image, causing an oops or kernel panic."
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-10-24T14:09:57.241Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
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          "url": "https://git.kernel.org/stable/c/db6fbc2b77849e3c3c2bc115ea9ac925c4625a0d"
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          "url": "https://git.kernel.org/stable/c/f6d9c8abdf06a9c7efa799532d66ed8d5a50734c"
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          "url": "https://git.kernel.org/stable/c/fcb137f6e7ed769f7ecad84364a33c451371b602"
        },
        {
          "url": "https://git.kernel.org/stable/c/21bc51cb89ced74d6645a138cc2f21184bc75094"
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      ],
      "title": "drm/vmwgfx: validate pitch coming from userspace",
      "x_generator": {
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    "assignerShortName": "Linux",
    "cveId": "CVE-2026-99002",
    "datePublished": "2026-10-23T12:20:22.763Z",
    "dateReserved": "2026-09-25T10:25:14.385Z",
    "dateUpdated": "2026-10-24T14:09:57.241Z",
    "state": "PUBLISHED"
  },
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                ],
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          }
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                "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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              "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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        "vulnStatus": "Received"
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  }
}



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