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.
Affected products
Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.
Linux Linux
Default version status: unaffected
96d8e90382dc336b5de401164597edfdc2e8d9f1 to < d12f6add48f2da15c8c8281961d3faad804c76cfaffected96d8e90382dc336b5de401164597edfdc2e8d9f1 to < aa1d005927db38af783c1a4a8a00a39e0229ab2daffected96d8e90382dc336b5de401164597edfdc2e8d9f1 to < a02e1d8f191324583599544d54e59e6a2b74bb0eaffected96d8e90382dc336b5de401164597edfdc2e8d9f1 to < a3314f10369df70925140f59bbe069718f65a0b9affected96d8e90382dc336b5de401164597edfdc2e8d9f1 to < 765ba1c91823a296447528791b89a6504947fd5caffected96d8e90382dc336b5de401164597edfdc2e8d9f1 to < 5832c55b3c824ba2fe9c36ac3c411baddcce053eaffected96d8e90382dc336b5de401164597edfdc2e8d9f1 to < c43122fef328a70045fe7621c06de6b2b8e19264affected
Linux Linux
Default version status: affected
2.6.36affected0 to < 2.6.36unaffected5.15.217 to ≤ 5.15.*unaffected6.1.178 to ≤ 6.1.*unaffected6.6.145 to ≤ 6.6.*unaffected6.12.97 to ≤ 6.12.*unaffected6.18.40 to ≤ 6.18.*unaffected7.1.5 to ≤ 7.1.*unaffected7.2 to ≤ *unaffected
References
- https://git.kernel.org/stable/c/d12f6add48f2da15c8c8281961d3faad804c76cf ↗
- https://git.kernel.org/stable/c/aa1d005927db38af783c1a4a8a00a39e0229ab2d ↗
- https://git.kernel.org/stable/c/a02e1d8f191324583599544d54e59e6a2b74bb0e ↗
- https://git.kernel.org/stable/c/a3314f10369df70925140f59bbe069718f65a0b9 ↗
- https://git.kernel.org/stable/c/765ba1c91823a296447528791b89a6504947fd5c ↗
- https://git.kernel.org/stable/c/5832c55b3c824ba2fe9c36ac3c411baddcce053e ↗
- https://git.kernel.org/stable/c/c43122fef328a70045fe7621c06de6b2b8e19264 ↗