Vulnerability-Lookup

GHSA-J7G9-89XM-VFHF

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: gadget: f_printer: take kref only for successful open

printer_open() returns -EBUSY when the character device is already open, but it increments dev->kref regardless of the return value. VFS does not call ->release() for a failed open, so every rejected second open permanently leaks one reference.

Move kref_get() into the successful-open branch.

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{
  "affected": [],
  "aliases": [
    "CVE-2026-64345"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-07-25T10:17:16Z",
    "severity": null
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nusb: gadget: f_printer: take kref only for successful open\n\nprinter_open() returns -EBUSY when the character device is already\nopen, but it increments dev-\u003ekref regardless of the return value. VFS\ndoes not call -\u003erelease() for a failed open, so every rejected second\nopen permanently leaks one reference.\n\nMove kref_get() into the successful-open branch.",
  "id": "GHSA-j7g9-89xm-vfhf",
  "modified": "2026-07-25T12:31:32Z",
  "published": "2026-07-25T12:31:32Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-64345"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/30adce93d5c4a5a1ec29d9249e3fdfcc391d406b"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/75c0ad13e136961328253742501b4efc3988a587"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/7f1f24c367938c5537e2308bf9a965f051d14774"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/8a5eba992c862b0c94411eecf9b7121e8636db38"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/94ec20d97aa51547965a539f660a1fe79c6929a3"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/bf20c94fa6aaff945f0ae3a23f3212cd299f28d9"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}

CVE-2026-64345 (GCVE-0-2026-64345)

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

Title

usb: gadget: f_printer: take kref only for successful open

Summary

In the Linux kernel, the following vulnerability has been resolved: usb: gadget: f_printer: take kref only for successful open printer_open() returns -EBUSY when the character device is already open, but it increments dev->kref regardless of the return value. VFS does not call ->release() for a failed open, so every rejected second open permanently leaks one reference. Move kref_get() into the successful-open branch.

Severity

No CVSS data available.

Assigner

Linux

References

6 references

URL	Tags
https://git.kernel.org/stable/c/94ec20d97aa515479…
https://git.kernel.org/stable/c/75c0ad13e13696132…
https://git.kernel.org/stable/c/bf20c94fa6aaff945…
https://git.kernel.org/stable/c/8a5eba992c862b0c9…
https://git.kernel.org/stable/c/7f1f24c367938c553…
https://git.kernel.org/stable/c/30adce93d5c4a5a1e…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: e8d5f92b8d30bb4ade76494490c3c065e12411b1 , < 94ec20d97aa51547965a539f660a1fe79c6929a3 (git) Affected: e8d5f92b8d30bb4ade76494490c3c065e12411b1 , < 75c0ad13e136961328253742501b4efc3988a587 (git) Affected: e8d5f92b8d30bb4ade76494490c3c065e12411b1 , < bf20c94fa6aaff945f0ae3a23f3212cd299f28d9 (git) Affected: e8d5f92b8d30bb4ade76494490c3c065e12411b1 , < 8a5eba992c862b0c94411eecf9b7121e8636db38 (git) Affected: e8d5f92b8d30bb4ade76494490c3c065e12411b1 , < 7f1f24c367938c5537e2308bf9a965f051d14774 (git) Affected: e8d5f92b8d30bb4ade76494490c3c065e12411b1 , < 30adce93d5c4a5a1ec29d9249e3fdfcc391d406b (git) Affected: 25c95c6bd4dc50a3c20de0fa7f450ea02b2320fc (git) Affected: 4a47581cf010dc351d8069978080fdb000c0776d (git) Affected: d9fe88b2a38dc700bf5bd3a09c7cd11bbc248367 (git) Affected: cedb0187b8ba929c3f76f28e6bc25804d65f8a54 (git) Affected: e9e791f5c39ab30e374a3b1a9c25ca7ff24988f3 (git) Affected: 34f026263889e2827e04acdc3a0eb9ecbd191ef0 (git) Affected: 5f845e5d18d151230476cf90aa46449f69ba2ef1 (git) Affected: 4.4.241 , < 4.5 (semver) Affected: 4.9.241 , < 4.10 (semver) Affected: 4.14.203 , < 4.15 (semver) Affected: 4.19.154 , < 4.20 (semver) Affected: 5.4.73 , < 5.5 (semver) Affected: 5.8.17 , < 5.9 (semver) Affected: 5.9.2 , < 5.10 (semver)
Linux	Linux	Affected: 5.10 Unaffected: 0 , < 5.10 (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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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/usb/gadget/function/f_printer.c"
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              "versionType": "git"
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              "versionType": "git"
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              "versionType": "git"
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              "status": "affected",
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              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "34f026263889e2827e04acdc3a0eb9ecbd191ef0",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "5f845e5d18d151230476cf90aa46449f69ba2ef1",
              "versionType": "git"
            },
            {
              "lessThan": "4.5",
              "status": "affected",
              "version": "4.4.241",
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              "versionType": "semver"
            },
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              "versionType": "semver"
            },
            {
              "lessThan": "4.20",
              "status": "affected",
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              "status": "affected",
              "version": "5.4.73",
              "versionType": "semver"
            },
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              "lessThan": "5.9",
              "status": "affected",
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            },
            {
              "lessThan": "5.10",
              "status": "affected",
              "version": "5.9.2",
              "versionType": "semver"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/usb/gadget/function/f_printer.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "5.10"
            },
            {
              "lessThan": "5.10",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.10.*",
              "status": "unaffected",
              "version": "5.10.261",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.145",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.96",
              "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": "5.10.261",
                  "versionStartIncluding": "5.10",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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                },
                {
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      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nusb: gadget: f_printer: take kref only for successful open\n\nprinter_open() returns -EBUSY when the character device is already\nopen, but it increments dev-\u003ekref regardless of the return value. VFS\ndoes not call -\u003erelease() for a failed open, so every rejected second\nopen permanently leaks one reference.\n\nMove kref_get() into the successful-open branch."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-07-25T08:50:07.069Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
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        {
          "url": "https://git.kernel.org/stable/c/30adce93d5c4a5a1ec29d9249e3fdfcc391d406b"
        }
      ],
      "title": "usb: gadget: f_printer: take kref only for successful open",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
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  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-64345",
    "datePublished": "2026-07-25T08:50:07.069Z",
    "dateReserved": "2026-07-19T15:36:31.781Z",
    "dateUpdated": "2026-07-25T08:50:07.069Z",
    "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.

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.

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GHSA-J7G9-89XM-VFHF

CVE-2026-64345 (GCVE-0-2026-64345)

Tags

Sightings

Nomenclature