0.0
NA
CVE-2026-64343
USB: ldusb: fix use-after-free on disconnect race
Overview
Description
In the Linux kernel, the following vulnerability has been resolved: USB: ldusb: fix use-after-free on disconnect race mutex_unlock() may access the mutex structure after releasing the lock and therefore cannot be used to manage lifetime of objects directly (unlike spinlocks and refcounts). [1][2] Use a kref to release the driver data to avoid use-after-free in mutex_unlock() when release() races with disconnect(). [1] a51749ab34d9 ("locking/mutex: Document that mutex_unlock() is non-atomic") [2] 2b9d9e0a9ba0 ("locking/mutex: Clarify that mutex_unlock(), and most other sleeping locks, can still use the lock object after it's unlocked")
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
Solution
Fix use-after-free with kref to avoid race condition on disconnect.
- Apply the USB patch for the Linux kernel.
- Use a kref to manage driver data release.
- Ensure mutex_unlock() does not race with disconnect.
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-2026-64343.
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-64343 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-2026-64343
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-2026-64343 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-64343 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': 'ce0d7d3f575fc1ba6a89c3c651e710355590daff', 'lessThan': 'fc55923a972e715f9a27187b47d4920709e23d85', 'versionType': 'git'}, {'status': 'affected', 'version': 'ce0d7d3f575fc1ba6a89c3c651e710355590daff', 'lessThan': 'e5a9bdce4bfd3e2226b5f3df5fb8385d6935ee69', 'versionType': 'git'}, {'status': 'affected', 'version': 'ce0d7d3f575fc1ba6a89c3c651e710355590daff', 'lessThan': 'af59829e67e11ba2511a9f8e4b9111afc7d1f550', 'versionType': 'git'}, {'status': 'affected', 'version': 'ce0d7d3f575fc1ba6a89c3c651e710355590daff', 'lessThan': '02ca08fff74cf9b0a3c4d2cacde1c6edeeb95bb4', 'versionType': 'git'}, {'status': 'affected', 'version': 'ce0d7d3f575fc1ba6a89c3c651e710355590daff', 'lessThan': 'd8f69404e1d671326f86d378b9f5bfbd56490e9d', 'versionType': 'git'}, {'status': 'affected', 'version': 'ce0d7d3f575fc1ba6a89c3c651e710355590daff', 'lessThan': '2107a4fc8ff1cf1d52f416c1e5cc8e97413a5915', 'versionType': 'git'}, {'status': 'affected', 'version': 'ce0d7d3f575fc1ba6a89c3c651e710355590daff', 'lessThan': 'a3e794136ab5e3ad1e7019175a4b837aec86db4b', 'versionType': 'git'}, {'status': 'affected', 'version': 'ce0d7d3f575fc1ba6a89c3c651e710355590daff', 'lessThan': '19bdfc7b3c179331eafa423d87e1336f43bbfeb8', 'versionType': 'git'}], 'programFiles': ['drivers/usb/misc/ldusb.c'], 'defaultStatus': 'unaffected'}, {'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '2.6.26'}, {'status': 'unaffected', 'version': '0', 'lessThan': '2.6.26', 'versionType': 'semver'}, {'status': 'unaffected', 'version': '5.10.261', 'versionType': 'semver', 'lessThanOrEqual': '5.10.*'}, {'status': 'unaffected', 'version': '5.15.212', 'versionType': 'semver', 'lessThanOrEqual': '5.15.*'}, {'status': 'unaffected', 'version': '6.1.178', 'versionType': 'semver', 'lessThanOrEqual': '6.1.*'}, {'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/misc/ldusb.c'], 'defaultStatus': 'affected'}] [{'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': 'ce0d7d3f575fc1ba6a89c3c651e710355590daff', 'lessThan': 'fc55923a972e715f9a27187b47d4920709e23d85', 'versionType': 'git'}, {'status': 'affected', 'version': 'ce0d7d3f575fc1ba6a89c3c651e710355590daff', 'lessThan': 'e5a9bdce4bfd3e2226b5f3df5fb8385d6935ee69', 'versionType': 'git'}, {'status': 'affected', 'version': 'ce0d7d3f575fc1ba6a89c3c651e710355590daff', 'lessThan': 'af59829e67e11ba2511a9f8e4b9111afc7d1f550', 'versionType': 'git'}, {'status': 'affected', 'version': 'ce0d7d3f575fc1ba6a89c3c651e710355590daff', 'lessThan': '02ca08fff74cf9b0a3c4d2cacde1c6edeeb95bb4', 'versionType': 'git'}, {'status': 'affected', 'version': 'ce0d7d3f575fc1ba6a89c3c651e710355590daff', 'lessThan': 'd8f69404e1d671326f86d378b9f5bfbd56490e9d', 'versionType': 'git'}, {'status': 'affected', 'version': 'ce0d7d3f575fc1ba6a89c3c651e710355590daff', 'lessThan': '2107a4fc8ff1cf1d52f416c1e5cc8e97413a5915', 'versionType': 'git'}, {'status': 'affected', 'version': 'ce0d7d3f575fc1ba6a89c3c651e710355590daff', 'lessThan': 'a3e794136ab5e3ad1e7019175a4b837aec86db4b', 'versionType': 'git'}, {'status': 'affected', 'version': 'ce0d7d3f575fc1ba6a89c3c651e710355590daff', 'lessThan': '19bdfc7b3c179331eafa423d87e1336f43bbfeb8', 'versionType': 'git'}], 'programFiles': ['drivers/usb/misc/ldusb.c'], 'defaultStatus': 'unaffected'}, {'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '2.6.26'}, {'status': 'unaffected', 'version': '0', 'lessThan': '2.6.26', 'versionType': 'semver'}, {'status': 'unaffected', 'version': '5.10.261', 'versionType': 'semver', 'lessThanOrEqual': '5.10.*'}, {'status': 'unaffected', 'version': '5.15.212', 'versionType': 'semver', 'lessThanOrEqual': '5.15.*'}, {'status': 'unaffected', 'version': '6.1.178', 'versionType': 'semver', 'lessThanOrEqual': '6.1.*'}, {'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/misc/ldusb.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': 'ce0d7d3f575fc1ba6a89c3c651e710355590daff', 'lessThan': 'fc55923a972e715f9a27187b47d4920709e23d85', 'versionType': 'git'}, {'status': 'affected', 'version': 'ce0d7d3f575fc1ba6a89c3c651e710355590daff', 'lessThan': 'e5a9bdce4bfd3e2226b5f3df5fb8385d6935ee69', 'versionType': 'git'}, {'status': 'affected', 'version': 'ce0d7d3f575fc1ba6a89c3c651e710355590daff', 'lessThan': 'af59829e67e11ba2511a9f8e4b9111afc7d1f550', 'versionType': 'git'}, {'status': 'affected', 'version': 'ce0d7d3f575fc1ba6a89c3c651e710355590daff', 'lessThan': '02ca08fff74cf9b0a3c4d2cacde1c6edeeb95bb4', 'versionType': 'git'}, {'status': 'affected', 'version': 'ce0d7d3f575fc1ba6a89c3c651e710355590daff', 'lessThan': 'd8f69404e1d671326f86d378b9f5bfbd56490e9d', 'versionType': 'git'}, {'status': 'affected', 'version': 'ce0d7d3f575fc1ba6a89c3c651e710355590daff', 'lessThan': '2107a4fc8ff1cf1d52f416c1e5cc8e97413a5915', 'versionType': 'git'}, {'status': 'affected', 'version': 'ce0d7d3f575fc1ba6a89c3c651e710355590daff', 'lessThan': 'a3e794136ab5e3ad1e7019175a4b837aec86db4b', 'versionType': 'git'}, {'status': 'affected', 'version': 'ce0d7d3f575fc1ba6a89c3c651e710355590daff', 'lessThan': '19bdfc7b3c179331eafa423d87e1336f43bbfeb8', 'versionType': 'git'}], 'programFiles': ['drivers/usb/misc/ldusb.c'], 'defaultStatus': 'unaffected'}, {'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '2.6.26'}, {'status': 'unaffected', 'version': '0', 'lessThan': '2.6.26', 'versionType': 'semver'}, {'status': 'unaffected', 'version': '5.10.261', 'versionType': 'semver', 'lessThanOrEqual': '5.10.*'}, {'status': 'unaffected', 'version': '5.15.212', 'versionType': 'semver', 'lessThanOrEqual': '5.15.*'}, {'status': 'unaffected', 'version': '6.1.178', 'versionType': 'semver', 'lessThanOrEqual': '6.1.*'}, {'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/misc/ldusb.c'], 'defaultStatus': 'affected'}] Added Description In the Linux kernel, the following vulnerability has been resolved: USB: ldusb: fix use-after-free on disconnect race mutex_unlock() may access the mutex structure after releasing the lock and therefore cannot be used to manage lifetime of objects directly (unlike spinlocks and refcounts). [1][2] Use a kref to release the driver data to avoid use-after-free in mutex_unlock() when release() races with disconnect(). [1] a51749ab34d9 ("locking/mutex: Document that mutex_unlock() is non-atomic") [2] 2b9d9e0a9ba0 ("locking/mutex: Clarify that mutex_unlock(), and most other sleeping locks, can still use the lock object after it's unlocked") Added Reference https://git.kernel.org/stable/c/02ca08fff74cf9b0a3c4d2cacde1c6edeeb95bb4 Added Reference https://git.kernel.org/stable/c/19bdfc7b3c179331eafa423d87e1336f43bbfeb8 Added Reference https://git.kernel.org/stable/c/2107a4fc8ff1cf1d52f416c1e5cc8e97413a5915 Added Reference https://git.kernel.org/stable/c/a3e794136ab5e3ad1e7019175a4b837aec86db4b Added Reference https://git.kernel.org/stable/c/af59829e67e11ba2511a9f8e4b9111afc7d1f550 Added Reference https://git.kernel.org/stable/c/d8f69404e1d671326f86d378b9f5bfbd56490e9d Added Reference https://git.kernel.org/stable/c/e5a9bdce4bfd3e2226b5f3df5fb8385d6935ee69 Added Reference https://git.kernel.org/stable/c/fc55923a972e715f9a27187b47d4920709e23d85
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.