Vulnerability-Lookup

GHSA-9VGC-PR94-C63X

Vulnerability from github – Published: 2026-06-25 09:31 – Updated: 2026-06-28 09:31

Details

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

KVM: arm64: nv: Fix handling of XN[0] when !FEAT_XNX

XN has already been extracted from its bitfield position so using FIELD_PREP() on the mask that clears XN[0] is completely broken, having the effect of unconditionally granting execute permissions...

Fix the obvious mistake by manipulating the right bit.

Severity

8.8 (High)


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

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{
  "affected": [],
  "aliases": [
    "CVE-2026-53200"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-06-25T09:16:37Z",
    "severity": "HIGH"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nKVM: arm64: nv: Fix handling of XN[0] when !FEAT_XNX\n\nXN has already been extracted from its bitfield position so using\nFIELD_PREP() on the mask that clears XN[0] is completely broken, having\nthe effect of unconditionally granting execute permissions...\n\nFix the obvious mistake by manipulating the right bit.",
  "id": "GHSA-9vgc-pr94-c63x",
  "modified": "2026-06-28T09:31:44Z",
  "published": "2026-06-25T09:31:20Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-53200"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/49b32ddb87a3a109afecea89e55d70f73956b8bc"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/b95976c2ea446044553a5f469c0bae13553d75ab"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ]
}

CVE-2026-53200 (GCVE-0-2026-53200)

Vulnerability from cvelistv5 – Published: 2026-06-25 08:39 – Updated: 2026-06-28 06:40

Title

KVM: arm64: nv: Fix handling of XN[0] when !FEAT_XNX

Summary

In the Linux kernel, the following vulnerability has been resolved: KVM: arm64: nv: Fix handling of XN[0] when !FEAT_XNX XN has already been extracted from its bitfield position so using FIELD_PREP() on the mask that clears XN[0] is completely broken, having the effect of unconditionally granting execute permissions... Fix the obvious mistake by manipulating the right bit.

Severity

8.8 (High)


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

Assigner

Linux

References

2 references

URL	Tags
https://git.kernel.org/stable/c/b95976c2ea4460445…
https://git.kernel.org/stable/c/49b32ddb87a3a109a…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: d93febe2ed2e0491af9d47f0ee6d4b01918877f4 , < b95976c2ea446044553a5f469c0bae13553d75ab (git) Affected: d93febe2ed2e0491af9d47f0ee6d4b01918877f4 , < 49b32ddb87a3a109afecea89e55d70f73956b8bc (git)
Linux	Linux	Affected: 6.19 Unaffected: 0 , < 6.19 (semver) Unaffected: 7.0.13 , ≤ 7.0.* (semver) Unaffected: 7.1 , ≤ * (original_commit_for_fix)

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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "arch/arm64/include/asm/kvm_nested.h"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "b95976c2ea446044553a5f469c0bae13553d75ab",
              "status": "affected",
              "version": "d93febe2ed2e0491af9d47f0ee6d4b01918877f4",
              "versionType": "git"
            },
            {
              "lessThan": "49b32ddb87a3a109afecea89e55d70f73956b8bc",
              "status": "affected",
              "version": "d93febe2ed2e0491af9d47f0ee6d4b01918877f4",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "arch/arm64/include/asm/kvm_nested.h"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "6.19"
            },
            {
              "lessThan": "6.19",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.0.*",
              "status": "unaffected",
              "version": "7.0.13",
              "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": "7.0.13",
                  "versionStartIncluding": "6.19",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.1",
                  "versionStartIncluding": "6.19",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nKVM: arm64: nv: Fix handling of XN[0] when !FEAT_XNX\n\nXN has already been extracted from its bitfield position so using\nFIELD_PREP() on the mask that clears XN[0] is completely broken, having\nthe effect of unconditionally granting execute permissions...\n\nFix the obvious mistake by manipulating the right bit."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "baseScore": 8.8,
            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H",
            "version": "3.1"
          }
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-06-28T06:40:18.167Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/b95976c2ea446044553a5f469c0bae13553d75ab"
        },
        {
          "url": "https://git.kernel.org/stable/c/49b32ddb87a3a109afecea89e55d70f73956b8bc"
        }
      ],
      "title": "KVM: arm64: nv: Fix handling of XN[0] when !FEAT_XNX",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-53200",
    "datePublished": "2026-06-25T08:39:08.968Z",
    "dateReserved": "2026-06-09T07:44:35.391Z",
    "dateUpdated": "2026-06-28T06:40:18.167Z",
    "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.

Action not permitted

GHSA-9VGC-PR94-C63X

CVE-2026-53200 (GCVE-0-2026-53200)

Tags

Sightings

Nomenclature