AZL-93794
See a problem?- Import Source
- https://github.com/microsoft/AzureLinuxVulnerabilityData/blob/main/osv/AZL-93794.json
- JSON Data
- https://api.osv.dev/v1/vulns/AZL-93794
- Upstream
- Published
- 2026-07-25T10:17:17Z
- Modified
- 2026-08-28T17:48:13.155857914Z
- Summary
- CVE-2026-64348 affecting package kernel for versions less than 6.6.145.2-1
- 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 ehciisosched before linking the URB to the endpoint queue, and keep the staged schedule in urb->hcpriv until isostreamschedule() and the link helpers consume it. If the controller is no longer accessible, or usbhcdlinkurbtoep() fails, submit jumps to donenot_linked before that handoff happens and leaks the staged schedule still attached to urb->hcpriv.
Free the staged schedule from donenotlinked 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.
- References