CVE-2026-64585 - can: esd_usb: kill anchored URBs before freeing netdevs

CVE-2026-64585 - can: esd_usb: kill anchored URBs before freeing netdevs

https://cvefeed.io/rssfeed/latest.atom / Thu, 08/06/2026 - 13:09
CVE ID :CVE-2026-64585
Published : Aug. 6, 2026, 8:16 a.m. | 58 minutes ago
Description :In the Linux kernel, the following vulnerability has been resolved: can: esd_usb: kill anchored URBs before freeing netdevs esd_usb_disconnect() frees each CAN netdev with free_candev() inside its per-netdev loop and only calls unlink_all_urbs(dev) afterwards. The per-netdev private data (struct esd_usb_net_priv) is embedded in the net_device allocation returned by alloc_candev(), so once free_candev() has run, dev->nets[i] points to freed memory. unlink_all_urbs() then dereferences the freed dev->nets[i] to kill the per-netdev TX anchor (usb_kill_anchored_urbs(&priv->tx_submitted)), clear active_tx_jobs, and reset priv->tx_contexts[]. Reorder the teardown so the anchored URBs are killed before the netdevs are freed, matching other CAN/USB drivers in the same directory such as ems_usb, usb_8dev and mcba_usb, which unregister, then unlink, then free: unregister the netdevs first (which stops their TX queues), call unlink_all_urbs(dev) once, then free the netdevs. This issue was found by an in-house static analysis tool.
Severity: 0.0 | NA
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