CVE-2026-80887 (GCVE-0-2026-80887)

Vulnerability from cvelistv5 – Published: 2026-09-04 17:11 – Updated: 2026-09-04 17:11
VLAI
Title
drm/vmwgfx: use check_add_overflow for shader size+offset bound
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.
Severity
No CVSS data available.
Assigner
Linux CNA under the mitre root
CNA scorecard D 53/100 over 6664 records in the last 180 days details
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: 668b206601c5f5063e03b76784a0d3024fa2b249 , < 1bbe7751f5ebac383405ef29a66622d65bd505d3 (git)
Affected: 668b206601c5f5063e03b76784a0d3024fa2b249 , < d3f44438aa805270aaead3b6840ccaea0f4c11f9 (git)
Affected: 668b206601c5f5063e03b76784a0d3024fa2b249 , < cfd163169af3be56eaef113c680ea251f0d09189 (git)
Affected: 668b206601c5f5063e03b76784a0d3024fa2b249 , < 5c725901908eb1e52a16fc0e2373cb761df42d21 (git)
Affected: 668b206601c5f5063e03b76784a0d3024fa2b249 , < 54d56d5b42d2e4c72ba6e365e9774da90698aa22 (git)
guessed Create a notification for this product.
Linux Linux Affected: 6.4
Unaffected: 0 , < 6.4 (semver)
Unaffected: 6.6.151 , ≤ 6.6.* (semver)
Unaffected: 6.12.103 , ≤ 6.12.* (semver)
Unaffected: 6.18.44 , ≤ 6.18.* (semver)
Unaffected: 7.1.8 , ≤ 7.1.* (semver)
Unaffected: 7.2 , ≤ * (original_commit_for_fix)
guessed Create a notification for this product.
Show details on NVD website
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{
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        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/gpu/drm/vmwgfx/vmwgfx_shader.c"
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        {
          "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"
      },
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        },
        {
          "url": "https://git.kernel.org/stable/c/54d56d5b42d2e4c72ba6e365e9774da90698aa22"
        }
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    "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"
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      "source": "Microsoft CSAF VEX",
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      "title": "drm/vmwgfx: use check_add_overflow for shader size+offset bound",
      "url": "https://msrc.microsoft.com/csaf/vex/2026/msrc_cve-2026-80887.json",
      "version": "2"
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          }
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}



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