CVE-2026-80887 (GCVE-0-2026-80887)
Vulnerability from cvelistv5
Published
2026-09-04 17:11
Modified
2026-09-04 17:11
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: drm/vmwgfx: use check_add_overflow for shader size+offset bound vmw_shader_define() validates the user-supplied shader window against its backing buffer with (u64)buffer->tbo.base.size < (u64)size + (u64)offset drm_vmw_shader_create_arg::offset is __u64 in the uapi; when it is near U64_MAX the unsigned addition wraps and the resulting tiny value passes the check. The unbounded offset is then stored in res->guest_memory_offset and forwarded to host SVGA shader-create commands. Use check_add_overflow() to detect the wrap and compare the resulting endpoint against the buffer size.
References
Impacted products
Vendor Product Version
Linux Linux Version: 668b206601c5f5063e03b76784a0d3024fa2b249
Version: 668b206601c5f5063e03b76784a0d3024fa2b249
Version: 668b206601c5f5063e03b76784a0d3024fa2b249
Version: 668b206601c5f5063e03b76784a0d3024fa2b249
Version: 668b206601c5f5063e03b76784a0d3024fa2b249
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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/gpu/drm/vmwgfx/vmwgfx_shader.c"
          ],
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        {
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          "product": "Linux",
          "programFiles": [
            "drivers/gpu/drm/vmwgfx/vmwgfx_shader.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "6.4"
            },
            {
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              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
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              "status": "unaffected",
              "version": "6.6.151",
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              "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"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.6.151",
                  "versionStartIncluding": "6.4",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.12.103",
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                },
                {
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              ],
              "negate": false,
              "operator": "OR"
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          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/vmwgfx: use check_add_overflow for shader size+offset bound\n\nvmw_shader_define() validates the user-supplied shader window against\nits backing buffer with\n\n\t(u64)buffer-\u003etbo.base.size \u003c (u64)size + (u64)offset\n\ndrm_vmw_shader_create_arg::offset is __u64 in the uapi; when it is\nnear U64_MAX the unsigned addition wraps and the resulting tiny value\npasses the check.  The unbounded offset is then stored in\nres-\u003eguest_memory_offset and forwarded to host SVGA shader-create\ncommands.\n\nUse check_add_overflow() to detect the wrap and compare the resulting\nendpoint against the buffer size."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-09-04T17:11:04.063Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/1bbe7751f5ebac383405ef29a66622d65bd505d3"
        },
        {
          "url": "https://git.kernel.org/stable/c/d3f44438aa805270aaead3b6840ccaea0f4c11f9"
        },
        {
          "url": "https://git.kernel.org/stable/c/cfd163169af3be56eaef113c680ea251f0d09189"
        },
        {
          "url": "https://git.kernel.org/stable/c/5c725901908eb1e52a16fc0e2373cb761df42d21"
        },
        {
          "url": "https://git.kernel.org/stable/c/54d56d5b42d2e4c72ba6e365e9774da90698aa22"
        }
      ],
      "title": "drm/vmwgfx: use check_add_overflow for shader size+offset bound",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-80887",
    "datePublished": "2026-09-04T17:11:04.063Z",
    "dateReserved": "2026-08-26T14:34:25.799Z",
    "dateUpdated": "2026-09-04T17:11:04.063Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}


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