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CVE-2026-64345
usb: gadget: f_printer: take kref only for successful open
Overview
Description

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.

Details
INFO

Published Date :

July 25, 2026, 10:17 a.m.

Last Modified :

Aug. 17, 2026, 5:17 a.m.

Remotely Exploit :

No

Source :

416baaa9-dc9f-4396-8d5f-8c081fb06d67
Impact
Affected Products

The following products are affected by CVE-2026-64345 vulnerability. Even if cvefeed.io is aware of the exact versions of the products that are affected, the information is not represented in the table below.

ID Vendor Product Action
1 Linux linux_kernel
: Total Affected Vendor : 1 | Products : 1
Solution
Fix reference counting in printer_open to prevent resource leaks.
  • Move kref_get() into the successful-open branch.
  • Ensure kref_get() is called only on successful open.
  • Verify resource management in gadget driver.
  • Apply the provided patch for usb: gadget: f_printer.
References
References to Advisories, Solutions, and Tools

Here, you will find a curated list of external links that provide in-depth information, practical solutions, and valuable tools related to CVE-2026-64345.

URL Resource
https://git.kernel.org/stable/c/30adce93d5c4a5a1ec29d9249e3fdfcc391d406b
https://git.kernel.org/stable/c/75c0ad13e136961328253742501b4efc3988a587
https://git.kernel.org/stable/c/7f1f24c367938c5537e2308bf9a965f051d14774
https://git.kernel.org/stable/c/8a5eba992c862b0c94411eecf9b7121e8636db38
https://git.kernel.org/stable/c/94ec20d97aa51547965a539f660a1fe79c6929a3
https://git.kernel.org/stable/c/bf20c94fa6aaff945f0ae3a23f3212cd299f28d9
CWE - Common Weakness Enumeration

While CVE identifies specific instances of vulnerabilities, CWE categorizes the common flaws or weaknesses that can lead to vulnerabilities. CVE-2026-64345 is associated with the following CWEs:

Common Attack Pattern Enumeration and Classification (CAPEC)

Common Attack Pattern Enumeration and Classification (CAPEC) stores attack patterns, which are descriptions of the common attributes and approaches employed by adversaries to exploit the CVE-2026-64345 weaknesses.

We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).

Results are limited to the first 15 repositories due to potential performance issues.

The following list is the news that have been mention CVE-2026-64345 vulnerability anywhere in the article.

Results are limited to the first 20 news articles due to potential performance issues.

The following table lists the changes that have been made to the CVE-2026-64345 vulnerability over time.

Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.

  • CVE Modified by 416baaa9-dc9f-4396-8d5f-8c081fb06d67

    Aug. 17, 2026

    Action Type Old Value New Value
    Changed Affected [{'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': 'e8d5f92b8d30bb4ade76494490c3c065e12411b1', 'lessThan': '94ec20d97aa51547965a539f660a1fe79c6929a3', 'versionType': 'git'}, {'status': 'affected', 'version': 'e8d5f92b8d30bb4ade76494490c3c065e12411b1', 'lessThan': '75c0ad13e136961328253742501b4efc3988a587', 'versionType': 'git'}, {'status': 'affected', 'version': 'e8d5f92b8d30bb4ade76494490c3c065e12411b1', 'lessThan': 'bf20c94fa6aaff945f0ae3a23f3212cd299f28d9', 'versionType': 'git'}, {'status': 'affected', 'version': 'e8d5f92b8d30bb4ade76494490c3c065e12411b1', 'lessThan': '8a5eba992c862b0c94411eecf9b7121e8636db38', 'versionType': 'git'}, {'status': 'affected', 'version': 'e8d5f92b8d30bb4ade76494490c3c065e12411b1', 'lessThan': '7f1f24c367938c5537e2308bf9a965f051d14774', 'versionType': 'git'}, {'status': 'affected', 'version': 'e8d5f92b8d30bb4ade76494490c3c065e12411b1', 'lessThan': '30adce93d5c4a5a1ec29d9249e3fdfcc391d406b', 'versionType': 'git'}, {'status': 'affected', 'version': '25c95c6bd4dc50a3c20de0fa7f450ea02b2320fc', 'versionType': 'git'}, {'status': 'affected', 'version': '4a47581cf010dc351d8069978080fdb000c0776d', 'versionType': 'git'}, {'status': 'affected', 'version': 'd9fe88b2a38dc700bf5bd3a09c7cd11bbc248367', 'versionType': 'git'}, {'status': 'affected', 'version': 'cedb0187b8ba929c3f76f28e6bc25804d65f8a54', 'versionType': 'git'}, {'status': 'affected', 'version': 'e9e791f5c39ab30e374a3b1a9c25ca7ff24988f3', 'versionType': 'git'}, {'status': 'affected', 'version': '34f026263889e2827e04acdc3a0eb9ecbd191ef0', 'versionType': 'git'}, {'status': 'affected', 'version': '5f845e5d18d151230476cf90aa46449f69ba2ef1', 'versionType': 'git'}, {'status': 'affected', 'version': '4.4.241', 'lessThan': '4.5', 'versionType': 'semver'}, {'status': 'affected', 'version': '4.9.241', 'lessThan': '4.10', 'versionType': 'semver'}, {'status': 'affected', 'version': '4.14.203', 'lessThan': '4.15', 'versionType': 'semver'}, {'status': 'affected', 'version': '4.19.154', 'lessThan': '4.20', 'versionType': 'semver'}, {'status': 'affected', 'version': '5.4.73', 'lessThan': '5.5', 'versionType': 'semver'}, {'status': 'affected', 'version': '5.8.17', 'lessThan': '5.9', 'versionType': 'semver'}, {'status': 'affected', 'version': '5.9.2', 'lessThan': '5.10', 'versionType': 'semver'}], 'programFiles': ['drivers/usb/gadget/function/f_printer.c'], 'defaultStatus': 'unaffected'}, {'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '5.10'}, {'status': 'unaffected', 'version': '0', 'lessThan': '5.10', 'versionType': 'semver'}, {'status': 'unaffected', 'version': '5.10.261', 'versionType': 'semver', 'lessThanOrEqual': '5.10.*'}, {'status': 'unaffected', 'version': '6.6.145', 'versionType': 'semver', 'lessThanOrEqual': '6.6.*'}, {'status': 'unaffected', 'version': '6.12.96', 'versionType': 'semver', 'lessThanOrEqual': '6.12.*'}, {'status': 'unaffected', 'version': '6.18.39', 'versionType': 'semver', 'lessThanOrEqual': '6.18.*'}, {'status': 'unaffected', 'version': '7.1.4', 'versionType': 'semver', 'lessThanOrEqual': '7.1.*'}, {'status': 'unaffected', 'version': '7.2-rc3', 'versionType': 'original_commit_for_fix', 'lessThanOrEqual': '*'}], 'programFiles': ['drivers/usb/gadget/function/f_printer.c'], 'defaultStatus': 'affected'}] [{'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': 'e8d5f92b8d30bb4ade76494490c3c065e12411b1', 'lessThan': '94ec20d97aa51547965a539f660a1fe79c6929a3', 'versionType': 'git'}, {'status': 'affected', 'version': 'e8d5f92b8d30bb4ade76494490c3c065e12411b1', 'lessThan': '75c0ad13e136961328253742501b4efc3988a587', 'versionType': 'git'}, {'status': 'affected', 'version': 'e8d5f92b8d30bb4ade76494490c3c065e12411b1', 'lessThan': 'bf20c94fa6aaff945f0ae3a23f3212cd299f28d9', 'versionType': 'git'}, {'status': 'affected', 'version': 'e8d5f92b8d30bb4ade76494490c3c065e12411b1', 'lessThan': '8a5eba992c862b0c94411eecf9b7121e8636db38', 'versionType': 'git'}, {'status': 'affected', 'version': 'e8d5f92b8d30bb4ade76494490c3c065e12411b1', 'lessThan': '7f1f24c367938c5537e2308bf9a965f051d14774', 'versionType': 'git'}, {'status': 'affected', 'version': 'e8d5f92b8d30bb4ade76494490c3c065e12411b1', 'lessThan': '30adce93d5c4a5a1ec29d9249e3fdfcc391d406b', 'versionType': 'git'}, {'status': 'affected', 'version': '25c95c6bd4dc50a3c20de0fa7f450ea02b2320fc', 'versionType': 'git'}, {'status': 'affected', 'version': '4a47581cf010dc351d8069978080fdb000c0776d', 'versionType': 'git'}, {'status': 'affected', 'version': 'd9fe88b2a38dc700bf5bd3a09c7cd11bbc248367', 'versionType': 'git'}, {'status': 'affected', 'version': 'cedb0187b8ba929c3f76f28e6bc25804d65f8a54', 'versionType': 'git'}, {'status': 'affected', 'version': 'e9e791f5c39ab30e374a3b1a9c25ca7ff24988f3', 'versionType': 'git'}, {'status': 'affected', 'version': '34f026263889e2827e04acdc3a0eb9ecbd191ef0', 'versionType': 'git'}, {'status': 'affected', 'version': '5f845e5d18d151230476cf90aa46449f69ba2ef1', 'versionType': 'git'}, {'status': 'affected', 'version': '4.4.241', 'lessThan': '4.5', 'versionType': 'semver'}, {'status': 'affected', 'version': '4.9.241', 'lessThan': '4.10', 'versionType': 'semver'}, {'status': 'affected', 'version': '4.14.203', 'lessThan': '4.15', 'versionType': 'semver'}, {'status': 'affected', 'version': '4.19.154', 'lessThan': '4.20', 'versionType': 'semver'}, {'status': 'affected', 'version': '5.4.73', 'lessThan': '5.5', 'versionType': 'semver'}, {'status': 'affected', 'version': '5.8.17', 'lessThan': '5.9', 'versionType': 'semver'}, {'status': 'affected', 'version': '5.9.2', 'lessThan': '5.10', 'versionType': 'semver'}], 'programFiles': ['drivers/usb/gadget/function/f_printer.c'], 'defaultStatus': 'unaffected'}, {'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '5.10'}, {'status': 'unaffected', 'version': '0', 'lessThan': '5.10', 'versionType': 'semver'}, {'status': 'unaffected', 'version': '5.10.261', 'versionType': 'semver', 'lessThanOrEqual': '5.10.*'}, {'status': 'unaffected', 'version': '6.6.145', 'versionType': 'semver', 'lessThanOrEqual': '6.6.*'}, {'status': 'unaffected', 'version': '6.12.96', 'versionType': 'semver', 'lessThanOrEqual': '6.12.*'}, {'status': 'unaffected', 'version': '6.18.39', 'versionType': 'semver', 'lessThanOrEqual': '6.18.*'}, {'status': 'unaffected', 'version': '7.1.4', 'versionType': 'semver', 'lessThanOrEqual': '7.1.*'}, {'status': 'unaffected', 'version': '7.2', 'versionType': 'original_commit_for_fix', 'lessThanOrEqual': '*'}], 'programFiles': ['drivers/usb/gadget/function/f_printer.c'], 'defaultStatus': 'affected'}]
  • New CVE Received by 416baaa9-dc9f-4396-8d5f-8c081fb06d67

    Jul. 25, 2026

    Action Type Old Value New Value
    Added Affected [{'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': 'e8d5f92b8d30bb4ade76494490c3c065e12411b1', 'lessThan': '94ec20d97aa51547965a539f660a1fe79c6929a3', 'versionType': 'git'}, {'status': 'affected', 'version': 'e8d5f92b8d30bb4ade76494490c3c065e12411b1', 'lessThan': '75c0ad13e136961328253742501b4efc3988a587', 'versionType': 'git'}, {'status': 'affected', 'version': 'e8d5f92b8d30bb4ade76494490c3c065e12411b1', 'lessThan': 'bf20c94fa6aaff945f0ae3a23f3212cd299f28d9', 'versionType': 'git'}, {'status': 'affected', 'version': 'e8d5f92b8d30bb4ade76494490c3c065e12411b1', 'lessThan': '8a5eba992c862b0c94411eecf9b7121e8636db38', 'versionType': 'git'}, {'status': 'affected', 'version': 'e8d5f92b8d30bb4ade76494490c3c065e12411b1', 'lessThan': '7f1f24c367938c5537e2308bf9a965f051d14774', 'versionType': 'git'}, {'status': 'affected', 'version': 'e8d5f92b8d30bb4ade76494490c3c065e12411b1', 'lessThan': '30adce93d5c4a5a1ec29d9249e3fdfcc391d406b', 'versionType': 'git'}, {'status': 'affected', 'version': '25c95c6bd4dc50a3c20de0fa7f450ea02b2320fc', 'versionType': 'git'}, {'status': 'affected', 'version': '4a47581cf010dc351d8069978080fdb000c0776d', 'versionType': 'git'}, {'status': 'affected', 'version': 'd9fe88b2a38dc700bf5bd3a09c7cd11bbc248367', 'versionType': 'git'}, {'status': 'affected', 'version': 'cedb0187b8ba929c3f76f28e6bc25804d65f8a54', 'versionType': 'git'}, {'status': 'affected', 'version': 'e9e791f5c39ab30e374a3b1a9c25ca7ff24988f3', 'versionType': 'git'}, {'status': 'affected', 'version': '34f026263889e2827e04acdc3a0eb9ecbd191ef0', 'versionType': 'git'}, {'status': 'affected', 'version': '5f845e5d18d151230476cf90aa46449f69ba2ef1', 'versionType': 'git'}, {'status': 'affected', 'version': '4.4.241', 'lessThan': '4.5', 'versionType': 'semver'}, {'status': 'affected', 'version': '4.9.241', 'lessThan': '4.10', 'versionType': 'semver'}, {'status': 'affected', 'version': '4.14.203', 'lessThan': '4.15', 'versionType': 'semver'}, {'status': 'affected', 'version': '4.19.154', 'lessThan': '4.20', 'versionType': 'semver'}, {'status': 'affected', 'version': '5.4.73', 'lessThan': '5.5', 'versionType': 'semver'}, {'status': 'affected', 'version': '5.8.17', 'lessThan': '5.9', 'versionType': 'semver'}, {'status': 'affected', 'version': '5.9.2', 'lessThan': '5.10', 'versionType': 'semver'}], 'programFiles': ['drivers/usb/gadget/function/f_printer.c'], 'defaultStatus': 'unaffected'}, {'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '5.10'}, {'status': 'unaffected', 'version': '0', 'lessThan': '5.10', 'versionType': 'semver'}, {'status': 'unaffected', 'version': '5.10.261', 'versionType': 'semver', 'lessThanOrEqual': '5.10.*'}, {'status': 'unaffected', 'version': '6.6.145', 'versionType': 'semver', 'lessThanOrEqual': '6.6.*'}, {'status': 'unaffected', 'version': '6.12.96', 'versionType': 'semver', 'lessThanOrEqual': '6.12.*'}, {'status': 'unaffected', 'version': '6.18.39', 'versionType': 'semver', 'lessThanOrEqual': '6.18.*'}, {'status': 'unaffected', 'version': '7.1.4', 'versionType': 'semver', 'lessThanOrEqual': '7.1.*'}, {'status': 'unaffected', 'version': '7.2-rc3', 'versionType': 'original_commit_for_fix', 'lessThanOrEqual': '*'}], 'programFiles': ['drivers/usb/gadget/function/f_printer.c'], 'defaultStatus': 'affected'}]
    Added Description 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.
    Added Reference https://git.kernel.org/stable/c/30adce93d5c4a5a1ec29d9249e3fdfcc391d406b
    Added Reference https://git.kernel.org/stable/c/75c0ad13e136961328253742501b4efc3988a587
    Added Reference https://git.kernel.org/stable/c/7f1f24c367938c5537e2308bf9a965f051d14774
    Added Reference https://git.kernel.org/stable/c/8a5eba992c862b0c94411eecf9b7121e8636db38
    Added Reference https://git.kernel.org/stable/c/94ec20d97aa51547965a539f660a1fe79c6929a3
    Added Reference https://git.kernel.org/stable/c/bf20c94fa6aaff945f0ae3a23f3212cd299f28d9
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days. Following chart shows the EPSS score history of the vulnerability.
CVSS
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