CVE-2026-64348usb: free iso schedules on failed submit
Updated under an hour ago ()
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It affects Linux and 1 other product. Add what you run to find out whether that includes you.
No exploitation reported and no EPSS estimate yet.
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Free account, 1 product
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.
- CVSS
- 7.8 HIGH (v3.1, NVD)CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- Weakness (CWE)
- Not given
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- Linux
- NVD analysis
- Analyzed
- Record last updated
- Aug 17, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
Linux Linux linux:linux (from the name) | from 8de98402652c01839ae321be6cb3054cf5735d83 before b0d00d077f9738d215af9b50c74dffab7a1de19f; from 8de98402652c01839ae321be6cb3054cf5735d83 before be5004395dfd0b6ec310db359f887fa396fd0dd2; from 8de98402652c01839ae321be6cb3054cf5735d83 before 8890699eea19027ef6e4f9cbcf27cba5e789793f; 8de98402652c01839ae321be6cb3054cf5735d83 builds before 6bc17a78a05671d303820224fb37ca339c1dc2cb; 8de98402652c01839ae321be6cb3054cf5735d83 builds before 4bb88aee6b868cbf73bf453f62497802f5fe4769; from 8de98402652c01839ae321be6cb3054cf5735d83 before b9399d25fbb34a05bbe76eeedd730f62ff2670e9 | CNA record |
linux linux_kernel linux:linux_kernel | from 2.6.15.1 before 5.10.261; from 5.11 before 6.6.145; from 6.7 before 6.12.96; from 6.13 before 6.18.39; from 6.19 before 7.1.4; 2.6.15; 2.6.15; 2.6.15; and 4 more ranges | NVD |
References
- https://git.kernel.org/stable/c/b0d00d077f9738d215af9b50c74dffab7a1de19fpatch
- https://git.kernel.org/stable/c/be5004395dfd0b6ec310db359f887fa396fd0dd2patch
- https://git.kernel.org/stable/c/8890699eea19027ef6e4f9cbcf27cba5e789793fpatch
- https://git.kernel.org/stable/c/6bc17a78a05671d303820224fb37ca339c1dc2cbpatch
- https://git.kernel.org/stable/c/4bb88aee6b868cbf73bf453f62497802f5fe4769patch
- https://git.kernel.org/stable/c/b9399d25fbb34a05bbe76eeedd730f62ff2670e9patch
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.