GCVE Workshop - 22 September 2026 (14:00-18:00), Luxembourg Before The Vulnopticon Conference - Registration

CVE-2026-45203 (GCVE-0-2026-45203)

Vulnerability from cvelistv5 – Published: 2026-07-10 20:57 – Updated: 2026-07-13 18:55
VLAI
Title
GPU DDK - rgxfw_hwperf_ufo() re-reads psCmdHeader->ui32CmdSize after initial check, TOCTOU
Summary
Kernel software installed and running inside a Host VM may post improper commands to the GPU Firmware to trigger a memory write outside the permitted range of memory for the host kernel. A TOCTOU bug existed where a malicious driver could modify values in memory after firmware validation but before use.
Severity
7.8 (High)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
SSVC
Exploitation: none Automatable: no Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-07-13 18:33 UTC
CWE
  • CWE-367 - CWE - CWE-367: Time-of-check Time-of-use (TOCTOU) Race Condition (4.20)
Assigner
References
Impacted products
Vendor Product Version CPE status
Imagination Technologies Graphics DDK Affected: 1.18 RTM2 (custom)
Affected: 23.2 RTM2 (custom)
Affected: 24.2 RTM2 (custom)
Affected: 25.1 RTM2 , ≤ 25.3 RTM (custom)
Affected: 26.1 RTM1 (custom)
Unaffected: 26.1 RTM2 (custom)
guessed Create a notification for this product.
Show details on NVD website
To clipboard 

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "cvssV3_1": {
              "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"
            }
          },
          {
            "other": {
              "content": {
                "id": "CVE-2026-45203",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "total"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-07-13T18:33:59.825342Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-07-13T18:55:12.679Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "defaultStatus": "unknown",
          "platforms": [
            "Linux",
            "Android"
          ],
          "product": "Graphics DDK",
          "vendor": "Imagination Technologies",
          "versions": [
            {
              "status": "affected",
              "version": "1.18 RTM2",
              "versionType": "custom"
            },
            {
              "status": "affected",
              "version": "23.2 RTM2",
              "versionType": "custom"
            },
            {
              "status": "affected",
              "version": "24.2 RTM2",
              "versionType": "custom"
            },
            {
              "lessThanOrEqual": "25.3 RTM",
              "status": "affected",
              "version": "25.1 RTM2",
              "versionType": "custom"
            },
            {
              "status": "affected",
              "version": "26.1 RTM1",
              "versionType": "custom"
            },
            {
              "status": "unaffected",
              "version": "26.1 RTM2",
              "versionType": "custom"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "supportingMedia": [
            {
              "base64": false,
              "type": "text/html",
              "value": "\u003cp\u003eKernel software installed and running inside a Host VM may post improper commands to the GPU Firmware to trigger a memory write outside the permitted range of memory for the host kernel.\n\u003cbr\u003e\n\u003cbr\u003eA TOCTOU bug existed where a malicious driver could modify values in memory after firmware validation but before use.\u003c/p\u003e"
            }
          ],
          "value": "Kernel software installed and running inside a Host VM may post improper commands to the GPU Firmware to trigger a memory write outside the permitted range of memory for the host kernel.\n\n\n\nA TOCTOU bug existed where a malicious driver could modify values in memory after firmware validation but before use."
        }
      ],
      "impacts": [
        {
          "capecId": "CAPEC-480",
          "descriptions": [
            {
              "lang": "en",
              "value": "CAPEC - CAPEC-480: Escaping Virtualization (Version 3.9)"
            }
          ]
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-367",
              "description": "CWE - CWE-367: Time-of-check Time-of-use (TOCTOU) Race Condition (4.20)",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-07-10T20:57:19.733Z",
        "orgId": "367425dc-4d06-4041-9650-c2dc6aaa27ce",
        "shortName": "imaginationtech"
      },
      "references": [
        {
          "url": "https://www.imaginationtech.com/gpu-driver-vulnerabilities/"
        }
      ],
      "source": {
        "discovery": "UNKNOWN"
      },
      "title": "GPU DDK - rgxfw_hwperf_ufo() re-reads psCmdHeader-\u003eui32CmdSize after initial check, TOCTOU",
      "x_generator": {
        "engine": "Vulnogram 0.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "367425dc-4d06-4041-9650-c2dc6aaa27ce",
    "assignerShortName": "imaginationtech",
    "cveId": "CVE-2026-45203",
    "datePublished": "2026-07-10T20:57:19.733Z",
    "dateReserved": "2026-05-11T10:58:04.163Z",
    "dateUpdated": "2026-07-13T18:55:12.679Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "epss": {
      "cve": "CVE-2026-45203",
      "date": "2026-09-17",
      "epss": "0.00125",
      "percentile": "0.02526"
    },
    "nvd": "{\"cve\":{\"id\":\"CVE-2026-45203\",\"sourceIdentifier\":\"367425dc-4d06-4041-9650-c2dc6aaa27ce\",\"published\":\"2026-07-10T21:16:54.760\",\"lastModified\":\"2026-08-12T17:34:26.917\",\"vulnStatus\":\"Analyzed\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"Kernel software installed and running inside a Host VM may post improper commands to the GPU Firmware to trigger a memory write outside the permitted range of memory for the host kernel.\\n\\n\\n\\nA TOCTOU bug existed where a malicious driver could modify values in memory after firmware validation but before use.\"}],\"affected\":[{\"source\":\"367425dc-4d06-4041-9650-c2dc6aaa27ce\",\"affectedData\":[{\"vendor\":\"Imagination Technologies\",\"product\":\"Graphics DDK\",\"defaultStatus\":\"unknown\",\"platforms\":[\"Linux\",\"Android\"],\"versions\":[{\"version\":\"1.18 RTM2\",\"versionType\":\"custom\",\"status\":\"affected\"},{\"version\":\"23.2 RTM2\",\"versionType\":\"custom\",\"status\":\"affected\"},{\"version\":\"24.2 RTM2\",\"versionType\":\"custom\",\"status\":\"affected\"},{\"version\":\"25.1 RTM2\",\"lessThanOrEqual\":\"25.3 RTM\",\"versionType\":\"custom\",\"status\":\"affected\"},{\"version\":\"26.1 RTM1\",\"versionType\":\"custom\",\"status\":\"affected\"},{\"version\":\"26.1 RTM2\",\"versionType\":\"custom\",\"status\":\"unaffected\"}]}]}],\"metrics\":{\"cvssMetricV31\":[{\"source\":\"134c704f-9b21-4f2e-91b3-4a467353bcc0\",\"type\":\"Secondary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H\",\"baseScore\":7.8,\"baseSeverity\":\"HIGH\",\"attackVector\":\"LOCAL\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"LOW\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"HIGH\",\"integrityImpact\":\"HIGH\",\"availabilityImpact\":\"HIGH\"},\"exploitabilityScore\":1.8,\"impactScore\":5.9}],\"ssvcV203\":[{\"source\":\"134c704f-9b21-4f2e-91b3-4a467353bcc0\",\"ssvcData\":{\"timestamp\":\"2026-07-13T18:33:59.825342Z\",\"id\":\"CVE-2026-45203\",\"options\":[{\"exploitation\":\"none\"},{\"automatable\":\"no\"},{\"technicalImpact\":\"total\"}],\"role\":\"CISA Coordinator\",\"version\":\"2.0.3\"}}]},\"weaknesses\":[{\"source\":\"367425dc-4d06-4041-9650-c2dc6aaa27ce\",\"type\":\"Secondary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-367\"}]}],\"configurations\":[{\"operator\":\"AND\",\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:imaginationtech:ddk:*:*:*:*:*:*:*:*\",\"versionEndExcluding\":\"26.1\",\"matchCriteriaId\":\"97C60721-9E04-406B-8036-D7799D679CD8\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:imaginationtech:ddk:26.1:rtm1:*:*:*:*:*:*\",\"matchCriteriaId\":\"B6047F4B-B29A-44F7-8F80-8A53C1917F38\"}]},{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":false,\"criteria\":\"cpe:2.3:o:google:android:-:*:*:*:*:*:*:*\",\"matchCriteriaId\":\"F8B9FEC8-73B6-43B8-B24E-1F7C20D91D26\"},{\"vulnerable\":false,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:-:*:*:*:*:*:*:*\",\"matchCriteriaId\":\"703AF700-7A70-47E2-BC3A-7FD03B3CA9C1\"}]}]}],\"references\":[{\"url\":\"https://www.imaginationtech.com/gpu-driver-vulnerabilities/\",\"source\":\"367425dc-4d06-4041-9650-c2dc6aaa27ce\",\"tags\":[\"Vendor Advisory\"]}]}}",
    "vulnrichment": {
      "containers": "{\"adp\": [{\"title\": \"CISA ADP Vulnrichment\", \"metrics\": [{\"cvssV3_1\": {\"scope\": \"UNCHANGED\", \"version\": \"3.1\", \"baseScore\": 7.8, \"attackVector\": \"LOCAL\", \"baseSeverity\": \"HIGH\", \"vectorString\": \"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H\", \"integrityImpact\": \"HIGH\", \"userInteraction\": \"NONE\", \"attackComplexity\": \"LOW\", \"availabilityImpact\": \"HIGH\", \"privilegesRequired\": \"LOW\", \"confidentialityImpact\": \"HIGH\"}}, {\"other\": {\"type\": \"ssvc\", \"content\": {\"id\": \"CVE-2026-45203\", \"role\": \"CISA Coordinator\", \"options\": [{\"Exploitation\": \"none\"}, {\"Automatable\": \"no\"}, {\"Technical Impact\": \"total\"}], \"version\": \"2.0.3\", \"timestamp\": \"2026-07-13T18:33:59.825342Z\"}}}], \"providerMetadata\": {\"orgId\": \"134c704f-9b21-4f2e-91b3-4a467353bcc0\", \"shortName\": \"CISA-ADP\", \"dateUpdated\": \"2026-07-13T18:34:11.080Z\"}}], \"cna\": {\"title\": \"GPU DDK - rgxfw_hwperf_ufo() re-reads psCmdHeader-\u003eui32CmdSize after initial check, TOCTOU\", \"source\": {\"discovery\": \"UNKNOWN\"}, \"impacts\": [{\"capecId\": \"CAPEC-480\", \"descriptions\": [{\"lang\": \"en\", \"value\": \"CAPEC - CAPEC-480: Escaping Virtualization (Version 3.9)\"}]}], \"affected\": [{\"vendor\": \"Imagination Technologies\", \"product\": \"Graphics DDK\", \"versions\": [{\"status\": \"affected\", \"version\": \"1.18 RTM2\", \"versionType\": \"custom\"}, {\"status\": \"affected\", \"version\": \"23.2 RTM2\", \"versionType\": \"custom\"}, {\"status\": \"affected\", \"version\": \"24.2 RTM2\", \"versionType\": \"custom\"}, {\"status\": \"affected\", \"version\": \"25.1 RTM2\", \"versionType\": \"custom\", \"lessThanOrEqual\": \"25.3 RTM\"}, {\"status\": \"affected\", \"version\": \"26.1 RTM1\", \"versionType\": \"custom\"}, {\"status\": \"unaffected\", \"version\": \"26.1 RTM2\", \"versionType\": \"custom\"}], \"platforms\": [\"Linux\", \"Android\"], \"defaultStatus\": \"unknown\"}], \"references\": [{\"url\": \"https://www.imaginationtech.com/gpu-driver-vulnerabilities/\"}], \"x_generator\": {\"engine\": \"Vulnogram 0.2.0\"}, \"descriptions\": [{\"lang\": \"en\", \"value\": \"Kernel software installed and running inside a Host VM may post improper commands to the GPU Firmware to trigger a memory write outside the permitted range of memory for the host kernel.\\n\\n\\n\\nA TOCTOU bug existed where a malicious driver could modify values in memory after firmware validation but before use.\", \"supportingMedia\": [{\"type\": \"text/html\", \"value\": \"\u003cp\u003eKernel software installed and running inside a Host VM may post improper commands to the GPU Firmware to trigger a memory write outside the permitted range of memory for the host kernel.\\n\u003cbr\u003e\\n\u003cbr\u003eA TOCTOU bug existed where a malicious driver could modify values in memory after firmware validation but before use.\u003c/p\u003e\", \"base64\": false}]}], \"problemTypes\": [{\"descriptions\": [{\"lang\": \"en\", \"type\": \"CWE\", \"cweId\": \"CWE-367\", \"description\": \"CWE - CWE-367: Time-of-check Time-of-use (TOCTOU) Race Condition (4.20)\"}]}], \"providerMetadata\": {\"orgId\": \"367425dc-4d06-4041-9650-c2dc6aaa27ce\", \"shortName\": \"imaginationtech\", \"dateUpdated\": \"2026-07-10T20:57:19.733Z\"}}}",
      "cveMetadata": "{\"cveId\": \"CVE-2026-45203\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2026-07-13T18:55:12.679Z\", \"dateReserved\": \"2026-05-11T10:58:04.163Z\", \"assignerOrgId\": \"367425dc-4d06-4041-9650-c2dc6aaa27ce\", \"datePublished\": \"2026-07-10T20:57:19.733Z\", \"assignerShortName\": \"imaginationtech\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}



Log in or create an account to share your comment.




Tags
Taxonomy of the tags.





Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


Detection rules are retrieved from Rulezet.


Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.