Vulnerability-Lookup

CVE-2026-64348 (GCVE-0-2026-64348)

Vulnerability from cvelistv5 – Published: 2026-07-25 08:50 – Updated: 2026-07-25 08:50

Title

usb: free iso schedules on failed submit

Summary

In the Linux kernel, the following vulnerability has been resolved: usb: free iso schedules on failed submit EHCI and FOTG210 isochronous submits build an ehci_iso_sched before linking the URB to the endpoint queue, and keep the staged schedule in urb->hcpriv until iso_stream_schedule() and the link helpers consume it. If the controller is no longer accessible, or usb_hcd_link_urb_to_ep() fails, submit jumps to done_not_linked before that handoff happens and leaks the staged schedule still attached to urb->hcpriv. Free the staged schedule from done_not_linked when submit fails before the URB is linked and clear urb->hcpriv after the free. The bug was first flagged by an experimental analysis tool we are developing for kernel memory-management bugs while analyzing v6.13-rc1. The tool is still under development and is not yet publicly available. Manual inspection confirms that the bug is still present in v7.1.1. An x86_64 allyesconfig build showed no new warnings. As we do not have an EHCI host controller with a USB isochronous device to test with, no runtime testing was able to be performed.

Severity

No CVSS data available.

Assigner

Linux

References

6 references

URL	Tags
https://git.kernel.org/stable/c/b0d00d077f9738d21…
https://git.kernel.org/stable/c/be5004395dfd0b6ec…
https://git.kernel.org/stable/c/8890699eea19027ef…
https://git.kernel.org/stable/c/6bc17a78a05671d30…
https://git.kernel.org/stable/c/4bb88aee6b868cbf7…
https://git.kernel.org/stable/c/b9399d25fbb34a05b…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: 8de98402652c01839ae321be6cb3054cf5735d83 , < b0d00d077f9738d215af9b50c74dffab7a1de19f (git) Affected: 8de98402652c01839ae321be6cb3054cf5735d83 , < be5004395dfd0b6ec310db359f887fa396fd0dd2 (git) Affected: 8de98402652c01839ae321be6cb3054cf5735d83 , < 8890699eea19027ef6e4f9cbcf27cba5e789793f (git) Affected: 8de98402652c01839ae321be6cb3054cf5735d83 , < 6bc17a78a05671d303820224fb37ca339c1dc2cb (git) Affected: 8de98402652c01839ae321be6cb3054cf5735d83 , < 4bb88aee6b868cbf73bf453f62497802f5fe4769 (git) Affected: 8de98402652c01839ae321be6cb3054cf5735d83 , < b9399d25fbb34a05bbe76eeedd730f62ff2670e9 (git)
Linux	Linux	Affected: 2.6.15 Unaffected: 0 , < 2.6.15 (semver) Unaffected: 5.10.261 , ≤ 5.10.* (semver) Unaffected: 6.6.145 , ≤ 6.6.* (semver) Unaffected: 6.12.96 , ≤ 6.12.* (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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{
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      "descriptions": [
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          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nusb: free iso schedules on failed submit\n\nEHCI and FOTG210 isochronous submits build an ehci_iso_sched before\nlinking the URB to the endpoint queue, and keep the staged schedule in\nurb-\u003ehcpriv until iso_stream_schedule() and the link helpers consume it.\nIf the controller is no longer accessible, or usb_hcd_link_urb_to_ep()\nfails, submit jumps to done_not_linked before that handoff happens and\nleaks the staged schedule still attached to urb-\u003ehcpriv.\n\nFree the staged schedule from done_not_linked when submit fails before\nthe URB is linked and clear urb-\u003ehcpriv after the free.\n\nThe bug was first flagged by an experimental analysis tool we are\ndeveloping for kernel memory-management bugs while analyzing\nv6.13-rc1. The tool is still under development and is not yet publicly\navailable. Manual inspection confirms that the bug is still\npresent in v7.1.1.\n\nAn x86_64 allyesconfig build showed no new warnings. As we do not have an\nEHCI host controller with a USB isochronous device to test with, no\nruntime testing was able to be performed."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-07-25T08:50:08.983Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
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          "url": "https://git.kernel.org/stable/c/be5004395dfd0b6ec310db359f887fa396fd0dd2"
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        },
        {
          "url": "https://git.kernel.org/stable/c/b9399d25fbb34a05bbe76eeedd730f62ff2670e9"
        }
      ],
      "title": "usb: free iso schedules on failed submit",
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    "assignerShortName": "Linux",
    "cveId": "CVE-2026-64348",
    "datePublished": "2026-07-25T08:50:08.983Z",
    "dateReserved": "2026-07-19T15:36:31.782Z",
    "dateUpdated": "2026-07-25T08:50:08.983Z",
    "state": "PUBLISHED"
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      "date": "2026-07-27",
      "epss": "0.00173",
      "percentile": "0.06929"
    },
    "microsoft_vex": {
      "current_release_date": "2026-07-26T01:07:26.000Z",
      "cve": "CVE-2026-64348",
      "id": "msrc_CVE-2026-64348",
      "initial_release_date": "2026-07-26T01:07:26.000Z",
      "product_status:under_investigation": "1",
      "source": "Microsoft CSAF VEX",
      "status": "final",
      "title": "usb: free iso schedules on failed submit",
      "url": "https://msrc.microsoft.com/csaf/vex/2026/msrc_cve-2026-64348.json",
      "version": "1"
    },
    "nvd": "{\"cve\":{\"id\":\"CVE-2026-64348\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2026-07-25T10:17:17.040\",\"lastModified\":\"2026-07-25T10:17:17.040\",\"vulnStatus\":\"Received\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\nusb: free iso schedules on failed submit\\n\\nEHCI and FOTG210 isochronous submits build an ehci_iso_sched before\\nlinking the URB to the endpoint queue, and keep the staged schedule in\\nurb-\u003ehcpriv until iso_stream_schedule() and the link helpers consume it.\\nIf the controller is no longer accessible, or usb_hcd_link_urb_to_ep()\\nfails, submit jumps to done_not_linked before that handoff happens and\\nleaks the staged schedule still attached to urb-\u003ehcpriv.\\n\\nFree the staged schedule from done_not_linked when submit fails before\\nthe URB is linked and clear urb-\u003ehcpriv after the free.\\n\\nThe bug was first flagged by an experimental analysis tool we are\\ndeveloping for kernel memory-management bugs while analyzing\\nv6.13-rc1. The tool is still under development and is not yet publicly\\navailable. Manual inspection confirms that the bug is still\\npresent in v7.1.1.\\n\\nAn x86_64 allyesconfig build showed no new warnings. As we do not have an\\nEHCI host controller with a USB isochronous device to test with, no\\nruntime testing was able to be performed.\"}],\"affected\":[{\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"affectedData\":[{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"unaffected\",\"programFiles\":[\"drivers/usb/fotg210/fotg210-hcd.c\",\"drivers/usb/host/ehci-sched.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"8de98402652c01839ae321be6cb3054cf5735d83\",\"lessThan\":\"b0d00d077f9738d215af9b50c74dffab7a1de19f\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"8de98402652c01839ae321be6cb3054cf5735d83\",\"lessThan\":\"be5004395dfd0b6ec310db359f887fa396fd0dd2\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"8de98402652c01839ae321be6cb3054cf5735d83\",\"lessThan\":\"8890699eea19027ef6e4f9cbcf27cba5e789793f\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"8de98402652c01839ae321be6cb3054cf5735d83\",\"lessThan\":\"6bc17a78a05671d303820224fb37ca339c1dc2cb\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"8de98402652c01839ae321be6cb3054cf5735d83\",\"lessThan\":\"4bb88aee6b868cbf73bf453f62497802f5fe4769\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"8de98402652c01839ae321be6cb3054cf5735d83\",\"lessThan\":\"b9399d25fbb34a05bbe76eeedd730f62ff2670e9\",\"versionType\":\"git\",\"status\":\"affected\"}]},{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"affected\",\"programFiles\":[\"drivers/usb/fotg210/fotg210-hcd.c\",\"drivers/usb/host/ehci-sched.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"2.6.15\",\"status\":\"affected\"},{\"version\":\"0\",\"lessThan\":\"2.6.15\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"5.10.261\",\"lessThanOrEqual\":\"5.10.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.6.145\",\"lessThanOrEqual\":\"6.6.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.12.96\",\"lessThanOrEqual\":\"6.12.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.18.39\",\"lessThanOrEqual\":\"6.18.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"7.1.4\",\"lessThanOrEqual\":\"7.1.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"7.2-rc3\",\"lessThanOrEqual\":\"*\",\"versionType\":\"original_commit_for_fix\",\"status\":\"unaffected\"}]}]}],\"metrics\":{},\"references\":[{\"url\":\"https://git.kernel.org/stable/c/4bb88aee6b868cbf73bf453f62497802f5fe4769\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/6bc17a78a05671d303820224fb37ca339c1dc2cb\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/8890699eea19027ef6e4f9cbcf27cba5e789793f\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/b0d00d077f9738d215af9b50c74dffab7a1de19f\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/b9399d25fbb34a05bbe76eeedd730f62ff2670e9\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/be5004395dfd0b6ec310db359f887fa396fd0dd2\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}",
    "suse_vex": {
      "aggregate_severity": "not set",
      "current_release_date": "2026-07-25T16:01:16Z",
      "cve": "CVE-2026-64348",
      "id": "CVE-2026-64348",
      "initial_release_date": "2026-07-25T16:01:16Z",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2026-64348",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2026-64348.json",
      "version": "2"
    }
  }
}

GHSA-C2PF-RR3M-QVWF

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:

usb: free iso schedules on failed submit

EHCI and FOTG210 isochronous submits build an ehci_iso_sched before linking the URB to the endpoint queue, and keep the staged schedule in urb->hcpriv until iso_stream_schedule() and the link helpers consume it. If the controller is no longer accessible, or usb_hcd_link_urb_to_ep() fails, submit jumps to done_not_linked before that handoff happens and leaks the staged schedule still attached to urb->hcpriv.

Free the staged schedule from done_not_linked when submit fails before the URB is linked and clear urb->hcpriv after the free.

The bug was first flagged by an experimental analysis tool we are developing for kernel memory-management bugs while analyzing v6.13-rc1. The tool is still under development and is not yet publicly available. Manual inspection confirms that the bug is still present in v7.1.1.

An x86_64 allyesconfig build showed no new warnings. As we do not have an EHCI host controller with a USB isochronous device to test with, no runtime testing was able to be performed.

Show details on source website

JSON

To clipboard

{
  "affected": [],
  "aliases": [
    "CVE-2026-64348"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-07-25T10:17:17Z",
    "severity": null
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nusb: free iso schedules on failed submit\n\nEHCI and FOTG210 isochronous submits build an ehci_iso_sched before\nlinking the URB to the endpoint queue, and keep the staged schedule in\nurb-\u003ehcpriv until iso_stream_schedule() and the link helpers consume it.\nIf the controller is no longer accessible, or usb_hcd_link_urb_to_ep()\nfails, submit jumps to done_not_linked before that handoff happens and\nleaks the staged schedule still attached to urb-\u003ehcpriv.\n\nFree the staged schedule from done_not_linked when submit fails before\nthe URB is linked and clear urb-\u003ehcpriv after the free.\n\nThe bug was first flagged by an experimental analysis tool we are\ndeveloping for kernel memory-management bugs while analyzing\nv6.13-rc1. The tool is still under development and is not yet publicly\navailable. Manual inspection confirms that the bug is still\npresent in v7.1.1.\n\nAn x86_64 allyesconfig build showed no new warnings. As we do not have an\nEHCI host controller with a USB isochronous device to test with, no\nruntime testing was able to be performed.",
  "id": "GHSA-c2pf-rr3m-qvwf",
  "modified": "2026-07-25T12:31:32Z",
  "published": "2026-07-25T12:31:32Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-64348"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/4bb88aee6b868cbf73bf453f62497802f5fe4769"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/6bc17a78a05671d303820224fb37ca339c1dc2cb"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/8890699eea19027ef6e4f9cbcf27cba5e789793f"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/b0d00d077f9738d215af9b50c74dffab7a1de19f"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/b9399d25fbb34a05bbe76eeedd730f62ff2670e9"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/be5004395dfd0b6ec310db359f887fa396fd0dd2"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}

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

CVE-2026-64348 (GCVE-0-2026-64348)

GHSA-C2PF-RR3M-QVWF

Tags

Sightings

Nomenclature