Vulnerability-Lookup

GHSA-GF7V-GPF5-6FGC

Vulnerability from github – Published: 2026-07-19 18:31 – Updated: 2026-07-20 15:31

Details

In the Linux kernel, the following vulnerability has been resolved:

KVM: arm64: vgic-its: Reject restored DTE with out-of-range num_eventid_bits

Userspace can restore an ITS Device Table Entry whose Size field encodes more EventID bits than the virtual ITS supports. The live MAPD path rejects that state, but vgic_its_restore_dte() accepts it and stores the out-of-range value in dev->num_eventid_bits.

Reject restored DTEs with num_eventid_bits > VITS_TYPER_IDBITS before allocating the device. This mirrors the MAPD check and prevents the restored state from reaching vgic_its_restore_itt(), where the unchecked value can be converted into an oversized scan_its_table() range.

Severity

9.0 (Critical)


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

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{
  "affected": [],
  "aliases": [
    "CVE-2026-64106"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-07-19T16:17:51Z",
    "severity": "CRITICAL"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nKVM: arm64: vgic-its: Reject restored DTE with out-of-range num_eventid_bits\n\nUserspace can restore an ITS Device Table Entry whose Size field encodes\nmore EventID bits than the virtual ITS supports.  The live MAPD path\nrejects that state, but vgic_its_restore_dte() accepts it and stores the\nout-of-range value in dev-\u003enum_eventid_bits.\n\nReject restored DTEs with num_eventid_bits \u003e VITS_TYPER_IDBITS before\nallocating the device.  This mirrors the MAPD check and prevents the\nrestored state from reaching vgic_its_restore_itt(), where the unchecked\nvalue can be converted into an oversized scan_its_table() range.",
  "id": "GHSA-gf7v-gpf5-6fgc",
  "modified": "2026-07-20T15:31:59Z",
  "published": "2026-07-19T18:31:52Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-64106"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/0680f511926589206f81f57f76ce131d7741a316"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/1716b7fea2ead941a0dfac06c4504a3437cdf00d"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/8bcd15b690a390241179516af1b6ae49ebfd9d95"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/9ce754ed8e7ab4e3999767ce1505f85c449ccb07"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/b94538186a3eae3763b8f96dacd610920a865aa7"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/dab9f93251b2c86a033de6098d0c73afddd55d4a"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:H",
      "type": "CVSS_V3"
    }
  ]
}

CVE-2026-64106 (GCVE-0-2026-64106)

Vulnerability from cvelistv5 – Published: 2026-07-19 15:40 – Updated: 2026-07-20 13:43

Title

KVM: arm64: vgic-its: Reject restored DTE with out-of-range num_eventid_bits

Summary

In the Linux kernel, the following vulnerability has been resolved: KVM: arm64: vgic-its: Reject restored DTE with out-of-range num_eventid_bits Userspace can restore an ITS Device Table Entry whose Size field encodes more EventID bits than the virtual ITS supports. The live MAPD path rejects that state, but vgic_its_restore_dte() accepts it and stores the out-of-range value in dev->num_eventid_bits. Reject restored DTEs with num_eventid_bits > VITS_TYPER_IDBITS before allocating the device. This mirrors the MAPD check and prevents the restored state from reaching vgic_its_restore_itt(), where the unchecked value can be converted into an oversized scan_its_table() range.

Severity

9 (Critical)


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

Assigner

Linux

References

6 references

URL	Tags
https://git.kernel.org/stable/c/1716b7fea2ead941a…
https://git.kernel.org/stable/c/dab9f93251b2c86a0…
https://git.kernel.org/stable/c/b94538186a3eae376…
https://git.kernel.org/stable/c/0680f511926589206…
https://git.kernel.org/stable/c/8bcd15b690a390241…
https://git.kernel.org/stable/c/9ce754ed8e7ab4e39…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: 57a9a117154c93539e33161dd318e6aeb8c04efa , < 1716b7fea2ead941a0dfac06c4504a3437cdf00d (git) Affected: 57a9a117154c93539e33161dd318e6aeb8c04efa , < dab9f93251b2c86a033de6098d0c73afddd55d4a (git) Affected: 57a9a117154c93539e33161dd318e6aeb8c04efa , < b94538186a3eae3763b8f96dacd610920a865aa7 (git) Affected: 57a9a117154c93539e33161dd318e6aeb8c04efa , < 0680f511926589206f81f57f76ce131d7741a316 (git) Affected: 57a9a117154c93539e33161dd318e6aeb8c04efa , < 8bcd15b690a390241179516af1b6ae49ebfd9d95 (git) Affected: 57a9a117154c93539e33161dd318e6aeb8c04efa , < 9ce754ed8e7ab4e3999767ce1505f85c449ccb07 (git)
Linux	Linux	Affected: 4.12 Unaffected: 0 , < 4.12 (semver) Unaffected: 6.1.175 , ≤ 6.1.* (semver) Unaffected: 6.6.142 , ≤ 6.6.* (semver) Unaffected: 6.12.92 , ≤ 6.12.* (semver) Unaffected: 6.18.34 , ≤ 6.18.* (semver) Unaffected: 7.0.11 , ≤ 7.0.* (semver) Unaffected: 7.1 , ≤ * (original_commit_for_fix)

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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "arch/arm64/kvm/vgic/vgic-its.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "1716b7fea2ead941a0dfac06c4504a3437cdf00d",
              "status": "affected",
              "version": "57a9a117154c93539e33161dd318e6aeb8c04efa",
              "versionType": "git"
            },
            {
              "lessThan": "dab9f93251b2c86a033de6098d0c73afddd55d4a",
              "status": "affected",
              "version": "57a9a117154c93539e33161dd318e6aeb8c04efa",
              "versionType": "git"
            },
            {
              "lessThan": "b94538186a3eae3763b8f96dacd610920a865aa7",
              "status": "affected",
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              "versionType": "git"
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            {
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              "versionType": "git"
            },
            {
              "lessThan": "8bcd15b690a390241179516af1b6ae49ebfd9d95",
              "status": "affected",
              "version": "57a9a117154c93539e33161dd318e6aeb8c04efa",
              "versionType": "git"
            },
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              "lessThan": "9ce754ed8e7ab4e3999767ce1505f85c449ccb07",
              "status": "affected",
              "version": "57a9a117154c93539e33161dd318e6aeb8c04efa",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "arch/arm64/kvm/vgic/vgic-its.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "4.12"
            },
            {
              "lessThan": "4.12",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.175",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.142",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.92",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.34",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.0.*",
              "status": "unaffected",
              "version": "7.0.11",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.1",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.1.175",
                  "versionStartIncluding": "4.12",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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                  "vulnerable": true
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                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nKVM: arm64: vgic-its: Reject restored DTE with out-of-range num_eventid_bits\n\nUserspace can restore an ITS Device Table Entry whose Size field encodes\nmore EventID bits than the virtual ITS supports.  The live MAPD path\nrejects that state, but vgic_its_restore_dte() accepts it and stores the\nout-of-range value in dev-\u003enum_eventid_bits.\n\nReject restored DTEs with num_eventid_bits \u003e VITS_TYPER_IDBITS before\nallocating the device.  This mirrors the MAPD check and prevents the\nrestored state from reaching vgic_its_restore_itt(), where the unchecked\nvalue can be converted into an oversized scan_its_table() range."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "baseScore": 9,
            "baseSeverity": "CRITICAL",
            "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:H",
            "version": "3.1"
          }
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-07-20T13:43:22.355Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/1716b7fea2ead941a0dfac06c4504a3437cdf00d"
        },
        {
          "url": "https://git.kernel.org/stable/c/dab9f93251b2c86a033de6098d0c73afddd55d4a"
        },
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        },
        {
          "url": "https://git.kernel.org/stable/c/0680f511926589206f81f57f76ce131d7741a316"
        },
        {
          "url": "https://git.kernel.org/stable/c/8bcd15b690a390241179516af1b6ae49ebfd9d95"
        },
        {
          "url": "https://git.kernel.org/stable/c/9ce754ed8e7ab4e3999767ce1505f85c449ccb07"
        }
      ],
      "title": "KVM: arm64: vgic-its: Reject restored DTE with out-of-range num_eventid_bits",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
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  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-64106",
    "datePublished": "2026-07-19T15:40:09.344Z",
    "dateReserved": "2026-07-19T07:54:57.034Z",
    "dateUpdated": "2026-07-20T13:43:22.355Z",
    "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.

Action not permitted

GHSA-GF7V-GPF5-6FGC

CVE-2026-64106 (GCVE-0-2026-64106)

Tags

Sightings

Nomenclature