CVE-2026-64348
usb: free iso schedules on failed submit
Description
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.
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
- Free the staged schedule when submit fails.
- Clear urb->hcpriv after the schedule is freed.
- Apply provided kernel patches.
- Update the Linux kernel.
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-2026-64348.
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-64348 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-2026-64348
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-2026-64348 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-64348 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': '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'}], 'programFiles': ['drivers/usb/fotg210/fotg210-hcd.c', 'drivers/usb/host/ehci-sched.c'], 'defaultStatus': 'unaffected'}, {'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '2.6.15'}, {'status': 'unaffected', 'version': '0', 'lessThan': '2.6.15', '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/fotg210/fotg210-hcd.c', 'drivers/usb/host/ehci-sched.c'], 'defaultStatus': 'affected'}] [{'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', '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'}], 'programFiles': ['drivers/usb/fotg210/fotg210-hcd.c', 'drivers/usb/host/ehci-sched.c'], 'defaultStatus': 'unaffected'}, {'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '2.6.15'}, {'status': 'unaffected', 'version': '0', 'lessThan': '2.6.15', '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/fotg210/fotg210-hcd.c', 'drivers/usb/host/ehci-sched.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': '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'}], 'programFiles': ['drivers/usb/fotg210/fotg210-hcd.c', 'drivers/usb/host/ehci-sched.c'], 'defaultStatus': 'unaffected'}, {'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '2.6.15'}, {'status': 'unaffected', 'version': '0', 'lessThan': '2.6.15', '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/fotg210/fotg210-hcd.c', 'drivers/usb/host/ehci-sched.c'], 'defaultStatus': 'affected'}] Added Description 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. Added Reference https://git.kernel.org/stable/c/4bb88aee6b868cbf73bf453f62497802f5fe4769 Added Reference https://git.kernel.org/stable/c/6bc17a78a05671d303820224fb37ca339c1dc2cb Added Reference https://git.kernel.org/stable/c/8890699eea19027ef6e4f9cbcf27cba5e789793f Added Reference https://git.kernel.org/stable/c/b0d00d077f9738d215af9b50c74dffab7a1de19f Added Reference https://git.kernel.org/stable/c/b9399d25fbb34a05bbe76eeedd730f62ff2670e9 Added Reference https://git.kernel.org/stable/c/be5004395dfd0b6ec310db359f887fa396fd0dd2