usb: free iso schedules on failed submit
Key facts
- Attack vector
- Local
- Privileges required
- Low
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Code execution
- Confidentiality · integrity · availability
- High · High · High
- Fix status
- Fixed
Attack profile from CVSS 3.1 · NVD. Fix status from CNA. Impact type from CWE-416 and the CVSS impact.
Summary
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.
Why it matters now
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- No
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| Linux | Linux | 2.6.15 and later | 5.10.261, 6.1.191, 6.6.145, 6.12.96, 6.18.39, 7.1.4, 7.2 | Patch available | CNA |
- Linux VendorLinux Affected 2.6.15 and later Fixed in 5.10.261, 6.1.191, 6.6.145, 6.12.96, 6.18.39, 7.1.4, 7.2 Patch available CNA
CPE configurations NVD · 8
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* | 2.6.15.1 to before 5.10.261; 5.11 to before 6.6.145; 6.7 to before 6.12.96; 6.13 to before 6.18.39; 6.19 to before 7.1.4 | Vulnerable | Linux |
| cpe:2.3:o:linux:linux_kernel:2.6.15:-:*:*:*:*:*:* | 2.6.15 | Vulnerable | Linux |
| cpe:2.3:o:linux:linux_kernel:2.6.15:rc4:*:*:*:*:*:* | 2.6.15 rc4 | Vulnerable | Linux |
| cpe:2.3:o:linux:linux_kernel:2.6.15:rc5:*:*:*:*:*:* | 2.6.15 rc5 | Vulnerable | Linux |
| cpe:2.3:o:linux:linux_kernel:2.6.15:rc6:*:*:*:*:*:* | 2.6.15 rc6 | Vulnerable | Linux |
| cpe:2.3:o:linux:linux_kernel:2.6.15:rc7:*:*:*:*:*:* | 2.6.15 rc7 | Vulnerable | Linux |
| cpe:2.3:o:linux:linux_kernel:7.2:rc1:*:*:*:*:*:* | 7.2 rc1 | Vulnerable | Linux |
| cpe:2.3:o:linux:linux_kernel:7.2:rc2:*:*:*:*:*:* | 7.2 rc2 | Vulnerable | Linux |
- cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* Versions 2.6.15.1 to before 5.10.261; 5.11 to before 6.6.145; 6.7 to before 6.12.96; 6.13 to before 6.18.39; 6.19 to before 7.1.4 Vulnerable ·Linux
- cpe:2.3:o:linux:linux_kernel:2.6.15:-:*:*:*:*:*:* Versions 2.6.15 Vulnerable ·Linux
- cpe:2.3:o:linux:linux_kernel:2.6.15:rc4:*:*:*:*:*:* Versions 2.6.15 rc4 Vulnerable ·Linux
- cpe:2.3:o:linux:linux_kernel:2.6.15:rc5:*:*:*:*:*:* Versions 2.6.15 rc5 Vulnerable ·Linux
- cpe:2.3:o:linux:linux_kernel:2.6.15:rc6:*:*:*:*:*:* Versions 2.6.15 rc6 Vulnerable ·Linux
- cpe:2.3:o:linux:linux_kernel:2.6.15:rc7:*:*:*:*:*:* Versions 2.6.15 rc7 Vulnerable ·Linux
- cpe:2.3:o:linux:linux_kernel:7.2:rc1:*:*:*:*:*:* Versions 7.2 rc1 Vulnerable ·Linux
- cpe:2.3:o:linux:linux_kernel:7.2:rc2:*:*:*:*:*:* Versions 7.2 rc2 Vulnerable ·Linux
Remediation
- Fix · CNA Linux (Linux) Fixed in 5.10.261, 6.1.191, 6.6.145, 6.12.96, 6.18.39, 7.1.4, 7.2
Vendor assessments
Red Hat
Not affected: 5 products
- Red Hat Enterprise Linux 10
- Red Hat Enterprise Linux 6
- Red Hat Enterprise Linux 7
- Red Hat Enterprise Linux 8
- Red Hat Enterprise Linux 9
Timeline
- 2026-10-02 Threatist record created from CVE-2026-64348
- 2026-10-03 Alias added: GHSA-c2pf-rr3m-qvwf
- 2026-10-30 Fix available: Linux/[email protected], Linux/Linux@ab12316c4639237cc9d50c80a0c6240f11fbba3f · CNA
- 2026-10-30 1 new reference · CNA
- 2026-11-06 CISA SSVC decision points changed
References
Patch 6
- https://git.kernel.org/stable/c/b0d00d077f9738d215af9b50c74dffab7a1de19f
- https://git.kernel.org/stable/c/be5004395dfd0b6ec310db359f887fa396fd0dd2
- https://git.kernel.org/stable/c/8890699eea19027ef6e4f9cbcf27cba5e789793f
- https://git.kernel.org/stable/c/6bc17a78a05671d303820224fb37ca339c1dc2cb
- https://git.kernel.org/stable/c/4bb88aee6b868cbf73bf453f62497802f5fe4769
- https://git.kernel.org/stable/c/b9399d25fbb34a05bbe76eeedd730f62ff2670e9
More Linux Kernel vulnerabilities
- TI-2025-26358 tls: fix handling of zero-length records on the rx_list KEVCVSS 3.1CRITICAL 9.8
- TI-2026-38352 netfilter: bridge: make ebt_snat ARP rewrite writable KEVCVSS 3.1HIGH 8.8
- TI-2013-05264 The (1) get_user and (2) put_user API functions in the Linux kernel before 3.5.5 on the… KEVCVSS 3.1HIGH 8.8
- TI-2022-00125 Integer overflow in kernel KEVCVSS 3.1HIGH 8.4
- TI-2013-01864 The perf_swevent_init function in kernel/events/core.c in the Linux kernel before 3.8.9… KEVCVSS 3.1HIGH 8.4
- TI-2021-05514 Heap Out-Of-Bounds Write in Netfilter IP6T_SO_SET_REPLACE KEVCVSS 3.1HIGH 8.3
Sources
- CVE-2026-64348 · CVE Program
- CVE-2026-64348 · NVD
- FIRST EPSS
- GHSA-c2pf-rr3m-qvwf · GitHub Advisory Database · CC BY 4.0
- CVE-2026-64348 · Red Hat security data · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences