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GHSA-W244-36CW-6GVR

Vulnerability from github – Published: 2026-07-25 12:31 – Updated: 2026-07-25 12:31

Details

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

xhci: sideband: fix ring sg table pages leak

xhci_ring_to_sgtable() allocates a temporary pages array and uses it to build the returned sg_table with sg_alloc_table_from_pages().

The error paths free the pages array, but the success path returns the sg_table without freeing it. This leaks the temporary array every time a sideband client gets an endpoint or event ring buffer.

Free the pages array after sg_alloc_table_from_pages() succeeds. The returned sg_table has its own scatterlist entries and does not depend on the temporary array after construction.

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{
  "affected": [],
  "aliases": [
    "CVE-2026-64464"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-07-25T10:17:31Z",
    "severity": null
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nxhci: sideband: fix ring sg table pages leak\n\nxhci_ring_to_sgtable() allocates a temporary pages array and\nuses it to build the returned sg_table with\nsg_alloc_table_from_pages().\n\nThe error paths free the pages array, but the success path\nreturns the sg_table without freeing it. This leaks the temporary\narray every time a sideband client gets an endpoint or event ring\nbuffer.\n\nFree the pages array after sg_alloc_table_from_pages() succeeds.\nThe returned sg_table has its own scatterlist entries and does not\ndepend on the temporary array after construction.",
  "id": "GHSA-w244-36cw-6gvr",
  "modified": "2026-07-25T12:31:36Z",
  "published": "2026-07-25T12:31:36Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-64464"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/49f6e3c3ef19f04f6657ed8dce550e36c763abb8"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/99d00a9e35e311a91d258029d5bb584377296c34"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/a3eaf82ff842d6ca95937ea584417e04828235a6"
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  ],
  "schema_version": "1.4.0",
  "severity": []
}

CVE-2026-64464 (GCVE-0-2026-64464)

Vulnerability from cvelistv5 – Published: 2026-07-25 08:51 – Updated: 2026-07-25 08:51

Title

xhci: sideband: fix ring sg table pages leak

Summary

In the Linux kernel, the following vulnerability has been resolved: xhci: sideband: fix ring sg table pages leak xhci_ring_to_sgtable() allocates a temporary pages array and uses it to build the returned sg_table with sg_alloc_table_from_pages(). The error paths free the pages array, but the success path returns the sg_table without freeing it. This leaks the temporary array every time a sideband client gets an endpoint or event ring buffer. Free the pages array after sg_alloc_table_from_pages() succeeds. The returned sg_table has its own scatterlist entries and does not depend on the temporary array after construction.

Severity

No CVSS data available.

Assigner

Linux

References

3 references

URL	Tags
https://git.kernel.org/stable/c/99d00a9e35e311a91…
https://git.kernel.org/stable/c/a3eaf82ff842d6ca9…
https://git.kernel.org/stable/c/49f6e3c3ef19f04f6…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: de66754e9f8029f8ae955a588959b99cab56b506 , < 99d00a9e35e311a91d258029d5bb584377296c34 (git) Affected: de66754e9f8029f8ae955a588959b99cab56b506 , < a3eaf82ff842d6ca95937ea584417e04828235a6 (git) Affected: de66754e9f8029f8ae955a588959b99cab56b506 , < 49f6e3c3ef19f04f6657ed8dce550e36c763abb8 (git)
Linux	Linux	Affected: 6.16 Unaffected: 0 , < 6.16 (semver) Unaffected: 6.18.39 , ≤ 6.18.* (semver) Unaffected: 7.1.4 , ≤ 7.1.* (semver) Unaffected: 7.2-rc3 , ≤ * (original_commit_for_fix)

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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/usb/host/xhci-sideband.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "99d00a9e35e311a91d258029d5bb584377296c34",
              "status": "affected",
              "version": "de66754e9f8029f8ae955a588959b99cab56b506",
              "versionType": "git"
            },
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              "status": "affected",
              "version": "de66754e9f8029f8ae955a588959b99cab56b506",
              "versionType": "git"
            },
            {
              "lessThan": "49f6e3c3ef19f04f6657ed8dce550e36c763abb8",
              "status": "affected",
              "version": "de66754e9f8029f8ae955a588959b99cab56b506",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/usb/host/xhci-sideband.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "6.16"
            },
            {
              "lessThan": "6.16",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.39",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.1.*",
              "status": "unaffected",
              "version": "7.1.4",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.2-rc3",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.18.39",
                  "versionStartIncluding": "6.16",
                  "vulnerable": true
                },
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                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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                  "versionStartIncluding": "6.16",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.2-rc3",
                  "versionStartIncluding": "6.16",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nxhci: sideband: fix ring sg table pages leak\n\nxhci_ring_to_sgtable() allocates a temporary pages array and\nuses it to build the returned sg_table with\nsg_alloc_table_from_pages().\n\nThe error paths free the pages array, but the success path\nreturns the sg_table without freeing it. This leaks the temporary\narray every time a sideband client gets an endpoint or event ring\nbuffer.\n\nFree the pages array after sg_alloc_table_from_pages() succeeds.\nThe returned sg_table has its own scatterlist entries and does not\ndepend on the temporary array after construction."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-07-25T08:51:30.443Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
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          "url": "https://git.kernel.org/stable/c/99d00a9e35e311a91d258029d5bb584377296c34"
        },
        {
          "url": "https://git.kernel.org/stable/c/a3eaf82ff842d6ca95937ea584417e04828235a6"
        },
        {
          "url": "https://git.kernel.org/stable/c/49f6e3c3ef19f04f6657ed8dce550e36c763abb8"
        }
      ],
      "title": "xhci: sideband: fix ring sg table pages leak",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-64464",
    "datePublished": "2026-07-25T08:51:30.443Z",
    "dateReserved": "2026-07-19T15:36:31.790Z",
    "dateUpdated": "2026-07-25T08:51:30.443Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
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}

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-W244-36CW-6GVR

CVE-2026-64464 (GCVE-0-2026-64464)

Tags

Sightings

Nomenclature