CVE-2026-64348usb: free iso schedules on failed submit
- 7.8HighCVSS base score
- 0.13%Exploitation in 30 daysEPSS · top 97% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- NonePublic exploitsnone known yet
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.
Timeline
ID reserved
By Linux
- 6 days later
· 6 days later
Published
- 3 months later
· 3 months later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| NVDNVD · Modified | 3.1 | High7.8 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
- EPSS (exploitation in 30 days)
- 0.13% · top 97% of all CVEs (12 Nov 2026)
- CISA SSVC
- Exploitation: none · Automatable: no · Technical impact: partial
The list uses the assigner's score when there is one, then CISA's, then NVD's: High 7.8.
Affected products
- affected 8de98402652c01839ae321be6cb3054cf5735d83 – < b0d00d077f9738d215af9b50c74dffab7a1de19f
- affected 8de98402652c01839ae321be6cb3054cf5735d83 – < ab12316c4639237cc9d50c80a0c6240f11fbba3f
- affected 8de98402652c01839ae321be6cb3054cf5735d83 – < be5004395dfd0b6ec310db359f887fa396fd0dd2
- affected 8de98402652c01839ae321be6cb3054cf5735d83 – < 8890699eea19027ef6e4f9cbcf27cba5e789793f
- affected 8de98402652c01839ae321be6cb3054cf5735d83 – < 6bc17a78a05671d303820224fb37ca339c1dc2cb
- affected 8de98402652c01839ae321be6cb3054cf5735d83 – < 4bb88aee6b868cbf73bf453f62497802f5fe4769
- affected 8de98402652c01839ae321be6cb3054cf5735d83 – < b9399d25fbb34a05bbe76eeedd730f62ff2670e9
- affected 2.6.15
- unaffected < 2.6.15
- unaffected 5.10.261 – ≤ 5.10.*
- unaffected 6.1.191 – ≤ 6.1.*
- unaffected 6.6.145 – ≤ 6.6.*
- unaffected 6.12.96 – ≤ 6.12.*
- unaffected 6.18.39 – ≤ 6.18.*
- unaffected 7.1.4 – ≤ 7.1.*
- unaffected 7.2 – ≤ *
References
References7
- https://git.kernel.org/stable/c/b0d00d077f9738d215af9b50c74dffab7a1de19f (opens in a new tab)
- https://git.kernel.org/stable/c/ab12316c4639237cc9d50c80a0c6240f11fbba3f (opens in a new tab)
- https://git.kernel.org/stable/c/be5004395dfd0b6ec310db359f887fa396fd0dd2 (opens in a new tab)
- https://git.kernel.org/stable/c/8890699eea19027ef6e4f9cbcf27cba5e789793f (opens in a new tab)
- https://git.kernel.org/stable/c/6bc17a78a05671d303820224fb37ca339c1dc2cb (opens in a new tab)
- https://git.kernel.org/stable/c/4bb88aee6b868cbf73bf453f62497802f5fe4769 (opens in a new tab)
- https://git.kernel.org/stable/c/b9399d25fbb34a05bbe76eeedd730f62ff2670e9 (opens in a new tab)
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- EUVD EUVD-2026-48892 (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://cveledger.app/cve/CVE-2026-64348)Record last updated .