github - ghsa-826j-xvc4-rfgh

GHSA-826J-XVC4-RFGH

Vulnerability from github – Published: 2025-07-10 09:32 – Updated: 2025-11-18 15:30

Details

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

virtio-pci: Fix result size returned for the admin command completion

The result size returned by virtio_pci_admin_dev_parts_get() is 8 bytes larger than the actual result data size. This occurs because the result_sg_size field of the command is filled with the result length from virtqueue_get_buf(), which includes both the data size and an additional 8 bytes of status.

This oversized result size causes two issues: 1. The state transferred to the destination includes 8 bytes of extra data at the end. 2. The allocated buffer in the kernel may be smaller than the returned size, leading to failures when reading beyond the allocated size.

The commit fixes this by subtracting the status size from the result of virtqueue_get_buf().

This fix has been tested through live migrations with virtio-net, virtio-net-transitional, and virtio-blk devices.

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-2025-38314"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2025-07-10T08:15:30Z",
    "severity": "MODERATE"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nvirtio-pci: Fix result size returned for the admin command completion\n\nThe result size returned by virtio_pci_admin_dev_parts_get() is 8 bytes\nlarger than the actual result data size. This occurs because the\nresult_sg_size field of the command is filled with the result length\nfrom virtqueue_get_buf(), which includes both the data size and an\nadditional 8 bytes of status.\n\nThis oversized result size causes two issues:\n1. The state transferred to the destination includes 8 bytes of extra\n   data at the end.\n2. The allocated buffer in the kernel may be smaller than the returned\n   size, leading to failures when reading beyond the allocated size.\n\nThe commit fixes this by subtracting the status size from the result of\nvirtqueue_get_buf().\n\nThis fix has been tested through live migrations with virtio-net,\nvirtio-net-transitional, and virtio-blk devices.",
  "id": "GHSA-826j-xvc4-rfgh",
  "modified": "2025-11-18T15:30:40Z",
  "published": "2025-07-10T09:32:30Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2025-38314"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/920b6720bb63893b81516c0c45884a8350f9e4bf"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/9ef41ebf787fcbde99ac404ae473f8467641f983"
    }
  ],
  "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-2025-38314 (GCVE-0-2025-38314)

Vulnerability from cvelistv5 – Published: 2025-07-10 07:42 – Updated: 2025-07-28 04:18

Title

virtio-pci: Fix result size returned for the admin command completion

Summary

In the Linux kernel, the following vulnerability has been resolved: virtio-pci: Fix result size returned for the admin command completion The result size returned by virtio_pci_admin_dev_parts_get() is 8 bytes larger than the actual result data size. This occurs because the result_sg_size field of the command is filled with the result length from virtqueue_get_buf(), which includes both the data size and an additional 8 bytes of status. This oversized result size causes two issues: 1. The state transferred to the destination includes 8 bytes of extra data at the end. 2. The allocated buffer in the kernel may be smaller than the returned size, leading to failures when reading beyond the allocated size. The commit fixes this by subtracting the status size from the result of virtqueue_get_buf(). This fix has been tested through live migrations with virtio-net, virtio-net-transitional, and virtio-blk devices.

Severity ?

No CVSS data available.

Assigner

Linux

References

URL

Tags

	https://git.kernel.org/stable/c/920b6720bb63893b8…
	https://git.kernel.org/stable/c/9ef41ebf787fcbde9…

Impacted products

Vendor

Product

Version

Linux

Affected: 704806ca400e5daa86c110f14bfdda9d28203bb7 , < 920b6720bb63893b81516c0c45884a8350f9e4bf (git)
Affected: 704806ca400e5daa86c110f14bfdda9d28203bb7 , < 9ef41ebf787fcbde99ac404ae473f8467641f983 (git)

Linux

Affected: 6.13
Unaffected: 0 , < 6.13 (semver)
Unaffected: 6.15.3 , ≤ 6.15.* (semver)
Unaffected: 6.16 , ≤ * (original_commit_for_fix)

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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/virtio/virtio_pci_modern.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "920b6720bb63893b81516c0c45884a8350f9e4bf",
              "status": "affected",
              "version": "704806ca400e5daa86c110f14bfdda9d28203bb7",
              "versionType": "git"
            },
            {
              "lessThan": "9ef41ebf787fcbde99ac404ae473f8467641f983",
              "status": "affected",
              "version": "704806ca400e5daa86c110f14bfdda9d28203bb7",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/virtio/virtio_pci_modern.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "6.13"
            },
            {
              "lessThan": "6.13",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.15.*",
              "status": "unaffected",
              "version": "6.15.3",
              "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": "6.15.3",
                  "versionStartIncluding": "6.13",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.16",
                  "versionStartIncluding": "6.13",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nvirtio-pci: Fix result size returned for the admin command completion\n\nThe result size returned by virtio_pci_admin_dev_parts_get() is 8 bytes\nlarger than the actual result data size. This occurs because the\nresult_sg_size field of the command is filled with the result length\nfrom virtqueue_get_buf(), which includes both the data size and an\nadditional 8 bytes of status.\n\nThis oversized result size causes two issues:\n1. The state transferred to the destination includes 8 bytes of extra\n   data at the end.\n2. The allocated buffer in the kernel may be smaller than the returned\n   size, leading to failures when reading beyond the allocated size.\n\nThe commit fixes this by subtracting the status size from the result of\nvirtqueue_get_buf().\n\nThis fix has been tested through live migrations with virtio-net,\nvirtio-net-transitional, and virtio-blk devices."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2025-07-28T04:18:24.788Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/920b6720bb63893b81516c0c45884a8350f9e4bf"
        },
        {
          "url": "https://git.kernel.org/stable/c/9ef41ebf787fcbde99ac404ae473f8467641f983"
        }
      ],
      "title": "virtio-pci: Fix result size returned for the admin command completion",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2025-38314",
    "datePublished": "2025-07-10T07:42:21.937Z",
    "dateReserved": "2025-04-16T04:51:24.003Z",
    "dateUpdated": "2025-07-28T04:18:24.788Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1"
}

Sightings

Author	Source	Type	Date

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-826J-XVC4-RFGH

CVE-2025-38314 (GCVE-0-2025-38314)

Tags

Sightings

Nomenclature