Vulnerability-Lookup

FKIE_CVE-2026-68255

Vulnerability from fkie_nvd - Published: 2026-08-10 13:20 - Updated: 2026-08-19 17:20

Severity

7.7 (High) - CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H

Summary

In the Linux kernel, the following vulnerability has been resolved: drm/virtio: bound EDID block reads to the response buffer virtio_get_edid_block() validates the read offset only against the device-supplied resp->size field, never against the fixed-size resp->edid array. The EDID block index is driven by the device-supplied extension count, so a malicious virtio-gpu backend can advertise a large size together with a high block count and read far past the array into adjacent kernel memory, which is then surfaced in the parsed EDID (an out-of-bounds read / info leak). Also reject any read whose end exceeds the size of the edid array. Conforming EDID responses stay within the array and are unaffected.

References

	URL	Tags
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/2757e6e803092cf0aeaf4b735e16b5d3bdc705c5
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/35be0e2c6862abcd5e5f5445261f1fd910d4a9b4
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/375c1934ef0196d3b6d3a1eae3232bef8dae7bf7
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/3f506a85a905b080cadc029a1651a310479090a6
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/4e1a53892ba7f8a3e1da6bfc53c83ae7c812dccd
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/9fc2a017c5d597937e0c28b9a9669844aa796c42

Impacted products

	Vendor	Product	Version

JSON

To clipboard

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/gpu/drm/virtio/virtgpu_vq.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "3f506a85a905b080cadc029a1651a310479090a6",
              "status": "affected",
              "version": "b4b01b4995fb15b55a2d067eb405917f5ab32709",
              "versionType": "git"
            },
            {
              "lessThan": "9fc2a017c5d597937e0c28b9a9669844aa796c42",
              "status": "affected",
              "version": "b4b01b4995fb15b55a2d067eb405917f5ab32709",
              "versionType": "git"
            },
            {
              "lessThan": "2757e6e803092cf0aeaf4b735e16b5d3bdc705c5",
              "status": "affected",
              "version": "b4b01b4995fb15b55a2d067eb405917f5ab32709",
              "versionType": "git"
            },
            {
              "lessThan": "35be0e2c6862abcd5e5f5445261f1fd910d4a9b4",
              "status": "affected",
              "version": "b4b01b4995fb15b55a2d067eb405917f5ab32709",
              "versionType": "git"
            },
            {
              "lessThan": "375c1934ef0196d3b6d3a1eae3232bef8dae7bf7",
              "status": "affected",
              "version": "b4b01b4995fb15b55a2d067eb405917f5ab32709",
              "versionType": "git"
            },
            {
              "lessThan": "4e1a53892ba7f8a3e1da6bfc53c83ae7c812dccd",
              "status": "affected",
              "version": "b4b01b4995fb15b55a2d067eb405917f5ab32709",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/gpu/drm/virtio/virtgpu_vq.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "5.0"
            },
            {
              "lessThan": "5.0",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.183",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.148",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.101",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.42",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.1.*",
              "status": "unaffected",
              "version": "7.1.6",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.2",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/virtio: bound EDID block reads to the response buffer\n\nvirtio_get_edid_block() validates the read offset only against the\ndevice-supplied resp-\u003esize field, never against the fixed-size resp-\u003eedid\narray. The EDID block index is driven by the device-supplied extension\ncount, so a malicious virtio-gpu backend can advertise a large size\ntogether with a high block count and read far past the array into adjacent\nkernel memory, which is then surfaced in the parsed EDID (an out-of-bounds\nread / info leak).\n\nAlso reject any read whose end exceeds the size of the edid array.\nConforming EDID responses stay within the array and are unaffected."
    }
  ],
  "id": "CVE-2026-68255",
  "lastModified": "2026-08-19T17:20:39.853",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "LOCAL",
          "availabilityImpact": "HIGH",
          "baseScore": 7.7,
          "baseSeverity": "HIGH",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "NONE",
          "privilegesRequired": "NONE",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 2.5,
        "impactScore": 5.2,
        "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "type": "Secondary"
      }
    ]
  },
  "published": "2026-08-10T13:20:14.113",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/2757e6e803092cf0aeaf4b735e16b5d3bdc705c5"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/35be0e2c6862abcd5e5f5445261f1fd910d4a9b4"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/375c1934ef0196d3b6d3a1eae3232bef8dae7bf7"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/3f506a85a905b080cadc029a1651a310479090a6"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/4e1a53892ba7f8a3e1da6bfc53c83ae7c812dccd"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/9fc2a017c5d597937e0c28b9a9669844aa796c42"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Received"
}

CVE-2026-68255 (GCVE-0-2026-68255)

Vulnerability from cvelistv5 – Published: 2026-08-10 12:01 – Updated: 2026-08-19 16:32

Title

drm/virtio: bound EDID block reads to the response buffer

Summary

Severity

7.7 (High)


                        
                          CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H

Assigner

Linux mitre root

References

6 references

URL	Tags
https://git.kernel.org/stable/c/3f506a85a905b080c…
https://git.kernel.org/stable/c/9fc2a017c5d597937…
https://git.kernel.org/stable/c/2757e6e803092cf0a…
https://git.kernel.org/stable/c/35be0e2c6862abcd5…
https://git.kernel.org/stable/c/375c1934ef0196d3b…
https://git.kernel.org/stable/c/4e1a53892ba7f8a3e…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: b4b01b4995fb15b55a2d067eb405917f5ab32709 , < 3f506a85a905b080cadc029a1651a310479090a6 (git) Affected: b4b01b4995fb15b55a2d067eb405917f5ab32709 , < 9fc2a017c5d597937e0c28b9a9669844aa796c42 (git) Affected: b4b01b4995fb15b55a2d067eb405917f5ab32709 , < 2757e6e803092cf0aeaf4b735e16b5d3bdc705c5 (git) Affected: b4b01b4995fb15b55a2d067eb405917f5ab32709 , < 35be0e2c6862abcd5e5f5445261f1fd910d4a9b4 (git) Affected: b4b01b4995fb15b55a2d067eb405917f5ab32709 , < 375c1934ef0196d3b6d3a1eae3232bef8dae7bf7 (git) Affected: b4b01b4995fb15b55a2d067eb405917f5ab32709 , < 4e1a53892ba7f8a3e1da6bfc53c83ae7c812dccd (git)
Linux	Linux	Affected: 5.0 Unaffected: 0 , < 5.0 (semver) Unaffected: 6.1.183 , ≤ 6.1.* (semver) Unaffected: 6.6.148 , ≤ 6.6.* (semver) Unaffected: 6.12.101 , ≤ 6.12.* (semver) Unaffected: 6.18.42 , ≤ 6.18.* (semver) Unaffected: 7.1.6 , ≤ 7.1.* (semver) Unaffected: 7.2 , ≤ * (original_commit_for_fix)

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/gpu/drm/virtio/virtgpu_vq.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "3f506a85a905b080cadc029a1651a310479090a6",
              "status": "affected",
              "version": "b4b01b4995fb15b55a2d067eb405917f5ab32709",
              "versionType": "git"
            },
            {
              "lessThan": "9fc2a017c5d597937e0c28b9a9669844aa796c42",
              "status": "affected",
              "version": "b4b01b4995fb15b55a2d067eb405917f5ab32709",
              "versionType": "git"
            },
            {
              "lessThan": "2757e6e803092cf0aeaf4b735e16b5d3bdc705c5",
              "status": "affected",
              "version": "b4b01b4995fb15b55a2d067eb405917f5ab32709",
              "versionType": "git"
            },
            {
              "lessThan": "35be0e2c6862abcd5e5f5445261f1fd910d4a9b4",
              "status": "affected",
              "version": "b4b01b4995fb15b55a2d067eb405917f5ab32709",
              "versionType": "git"
            },
            {
              "lessThan": "375c1934ef0196d3b6d3a1eae3232bef8dae7bf7",
              "status": "affected",
              "version": "b4b01b4995fb15b55a2d067eb405917f5ab32709",
              "versionType": "git"
            },
            {
              "lessThan": "4e1a53892ba7f8a3e1da6bfc53c83ae7c812dccd",
              "status": "affected",
              "version": "b4b01b4995fb15b55a2d067eb405917f5ab32709",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/gpu/drm/virtio/virtgpu_vq.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "5.0"
            },
            {
              "lessThan": "5.0",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.183",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.148",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.101",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.42",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.1.*",
              "status": "unaffected",
              "version": "7.1.6",
              "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": "6.1.183",
                  "versionStartIncluding": "5.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.6.148",
                  "versionStartIncluding": "5.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.12.101",
                  "versionStartIncluding": "5.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.18.42",
                  "versionStartIncluding": "5.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.1.6",
                  "versionStartIncluding": "5.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.2",
                  "versionStartIncluding": "5.0",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/virtio: bound EDID block reads to the response buffer\n\nvirtio_get_edid_block() validates the read offset only against the\ndevice-supplied resp-\u003esize field, never against the fixed-size resp-\u003eedid\narray. The EDID block index is driven by the device-supplied extension\ncount, so a malicious virtio-gpu backend can advertise a large size\ntogether with a high block count and read far past the array into adjacent\nkernel memory, which is then surfaced in the parsed EDID (an out-of-bounds\nread / info leak).\n\nAlso reject any read whose end exceeds the size of the edid array.\nConforming EDID responses stay within the array and are unaffected."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "baseScore": 7.7,
            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H",
            "version": "3.1"
          },
          "scenarios": [
            {
              "lang": "en",
              "value": "AV:L - The attacker is a malicious or compromised virtio-gpu backend (host/hypervisor device emulation or a vhost-user device process) supplying crafted EDID responses over the virtqueue; this is device-to-guest-kernel access, not remote network access.\nAC:L - The device fully controls resp-\u003esize, the EDID extension count and the timing of the read by raising VIRTIO_GPU_EVENT_DISPLAY config-change interrupts, so it can trigger the out-of-bounds read reliably and repeatedly with no conditions outside its control.\nPR:N - No guest credentials are needed at all: the vulnerable path runs in the virtio-gpu probe and the config-changed workqueue in kernel context, driven purely by device responses.\nUI:N - EDID re-reads are initiated automatically at probe and on device-raised display events; no guest user has to open, mount or interact with anything.\nS:U - The out-of-bounds read and the resulting disclosure both occur within the guest kernel\u0027s own security authority; no IOMMU, VM or sandbox boundary is crossed by the impact itself.\nC:H - Block indices up to 255 give start offsets of ~32 KB past the 1024-byte resp-\u003eedid array, reading far beyond the kmalloc\u0027d response object into adjacent kernel heap memory, which is then surfaced as parsed EDID via the connector blob property and world-readable sysfs edid file, and hex-dumped for bad blocks.\nI:N - Destination buffers in _drm_do_get_edid() are allocated from the block count, so the flaw is strictly an over-read of the response buffer with no out-of-bounds write or kernel data modification.\nA:H - The memcpy can walk tens of kilobytes past the slab object into unmapped or guarded memory, causing an oops/panic (and an immediate BUG under KASAN/hardened builds), and the device can repeat it at will."
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-08-19T16:32:26.120Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/3f506a85a905b080cadc029a1651a310479090a6"
        },
        {
          "url": "https://git.kernel.org/stable/c/9fc2a017c5d597937e0c28b9a9669844aa796c42"
        },
        {
          "url": "https://git.kernel.org/stable/c/2757e6e803092cf0aeaf4b735e16b5d3bdc705c5"
        },
        {
          "url": "https://git.kernel.org/stable/c/35be0e2c6862abcd5e5f5445261f1fd910d4a9b4"
        },
        {
          "url": "https://git.kernel.org/stable/c/375c1934ef0196d3b6d3a1eae3232bef8dae7bf7"
        },
        {
          "url": "https://git.kernel.org/stable/c/4e1a53892ba7f8a3e1da6bfc53c83ae7c812dccd"
        }
      ],
      "title": "drm/virtio: bound EDID block reads to the response buffer",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-68255",
    "datePublished": "2026-08-10T12:01:24.835Z",
    "dateReserved": "2026-07-30T09:28:09.377Z",
    "dateUpdated": "2026-08-19T16:32:26.120Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

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.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.

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FKIE_CVE-2026-68255

CVE-2026-68255 (GCVE-0-2026-68255)

Tags

Sightings

Nomenclature