Vulnerability-Lookup

GHSA-632W-7GXQ-VXQ4

Vulnerability from github – Published: 2025-07-28 12:30 – Updated: 2025-11-19 18:31

Details

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

KVM: x86/xen: Fix cleanup logic in emulation of Xen schedop poll hypercalls

kvm_xen_schedop_poll does a kmalloc_array() when a VM polls the host for more than one event channel potr (nr_ports > 1).

After the kmalloc_array(), the error paths need to go through the "out" label, but the call to kvm_read_guest_virt() does not.

[Adjusted commit message. - Paolo]

Severity

5.5 (Medium)


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

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{
  "affected": [],
  "aliases": [
    "CVE-2025-38469"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2025-07-28T12:15:28Z",
    "severity": "MODERATE"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nKVM: x86/xen: Fix cleanup logic in emulation of Xen schedop poll hypercalls\n\nkvm_xen_schedop_poll does a kmalloc_array() when a VM polls the host\nfor more than one event channel potr (nr_ports \u003e 1).\n\nAfter the kmalloc_array(), the error paths need to go through the\n\"out\" label, but the call to kvm_read_guest_virt() does not.\n\n[Adjusted commit message. - Paolo]",
  "id": "GHSA-632w-7gxq-vxq4",
  "modified": "2025-11-19T18:31:17Z",
  "published": "2025-07-28T12:30:34Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2025-38469"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/061c553c66bc1638c280739999224c8000fd4602"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/3ee59c38ae7369ad1f7b846e05633ccf0d159fab"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/5a53249d149f48b558368c5338b9921b76a12f8c"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/fd627ac8a5cff4d45269f164b13ddddc0726f2cc"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    }
  ]
}

CVE-2025-38469 (GCVE-0-2025-38469)

Vulnerability from cvelistv5 – Published: 2025-07-28 11:21 – Updated: 2026-05-11 21:28

Title

KVM: x86/xen: Fix cleanup logic in emulation of Xen schedop poll hypercalls

Summary

In the Linux kernel, the following vulnerability has been resolved: KVM: x86/xen: Fix cleanup logic in emulation of Xen schedop poll hypercalls kvm_xen_schedop_poll does a kmalloc_array() when a VM polls the host for more than one event channel potr (nr_ports > 1). After the kmalloc_array(), the error paths need to go through the "out" label, but the call to kvm_read_guest_virt() does not. [Adjusted commit message. - Paolo]

Severity

No CVSS data available.

Assigner

Linux mitre root

References

4 references

URL	Tags
https://git.kernel.org/stable/c/3ee59c38ae7369ad1…
https://git.kernel.org/stable/c/fd627ac8a5cff4d45…
https://git.kernel.org/stable/c/061c553c66bc1638c…
https://git.kernel.org/stable/c/5a53249d149f48b55…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: 92c58965e9656dc6e682a8ffe520fac0fb256d13 , < 3ee59c38ae7369ad1f7b846e05633ccf0d159fab (git) Affected: 92c58965e9656dc6e682a8ffe520fac0fb256d13 , < fd627ac8a5cff4d45269f164b13ddddc0726f2cc (git) Affected: 92c58965e9656dc6e682a8ffe520fac0fb256d13 , < 061c553c66bc1638c280739999224c8000fd4602 (git) Affected: 92c58965e9656dc6e682a8ffe520fac0fb256d13 , < 5a53249d149f48b558368c5338b9921b76a12f8c (git)
Linux	Linux	Affected: 6.2 Unaffected: 0 , < 6.2 (semver) Unaffected: 6.6.100 , ≤ 6.6.* (semver) Unaffected: 6.12.40 , ≤ 6.12.* (semver) Unaffected: 6.15.8 , ≤ 6.15.* (semver) Unaffected: 6.16 , ≤ * (original_commit_for_fix)

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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "arch/x86/kvm/xen.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "3ee59c38ae7369ad1f7b846e05633ccf0d159fab",
              "status": "affected",
              "version": "92c58965e9656dc6e682a8ffe520fac0fb256d13",
              "versionType": "git"
            },
            {
              "lessThan": "fd627ac8a5cff4d45269f164b13ddddc0726f2cc",
              "status": "affected",
              "version": "92c58965e9656dc6e682a8ffe520fac0fb256d13",
              "versionType": "git"
            },
            {
              "lessThan": "061c553c66bc1638c280739999224c8000fd4602",
              "status": "affected",
              "version": "92c58965e9656dc6e682a8ffe520fac0fb256d13",
              "versionType": "git"
            },
            {
              "lessThan": "5a53249d149f48b558368c5338b9921b76a12f8c",
              "status": "affected",
              "version": "92c58965e9656dc6e682a8ffe520fac0fb256d13",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "arch/x86/kvm/xen.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "6.2"
            },
            {
              "lessThan": "6.2",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.100",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.40",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.15.*",
              "status": "unaffected",
              "version": "6.15.8",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "6.16",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.6.100",
                  "versionStartIncluding": "6.2",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.12.40",
                  "versionStartIncluding": "6.2",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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                  "versionStartIncluding": "6.2",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.16",
                  "versionStartIncluding": "6.2",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nKVM: x86/xen: Fix cleanup logic in emulation of Xen schedop poll hypercalls\n\nkvm_xen_schedop_poll does a kmalloc_array() when a VM polls the host\nfor more than one event channel potr (nr_ports \u003e 1).\n\nAfter the kmalloc_array(), the error paths need to go through the\n\"out\" label, but the call to kvm_read_guest_virt() does not.\n\n[Adjusted commit message. - Paolo]"
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-05-11T21:28:36.841Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
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          "url": "https://git.kernel.org/stable/c/3ee59c38ae7369ad1f7b846e05633ccf0d159fab"
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        },
        {
          "url": "https://git.kernel.org/stable/c/5a53249d149f48b558368c5338b9921b76a12f8c"
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      ],
      "title": "KVM: x86/xen: Fix cleanup logic in emulation of Xen schedop poll hypercalls",
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  "cveMetadata": {
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    "assignerShortName": "Linux",
    "cveId": "CVE-2025-38469",
    "datePublished": "2025-07-28T11:21:30.992Z",
    "dateReserved": "2025-04-16T04:51:24.020Z",
    "dateUpdated": "2026-05-11T21:28:36.841Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

Sightings

Author	Source	Type	Date	Other

Nomenclature

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Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
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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.

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GHSA-632W-7GXQ-VXQ4

CVE-2025-38469 (GCVE-0-2025-38469)

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