CVE-2026-23362
Description
In the Linux kernel, the following vulnerability has been resolved: can: bcm: fix locking for bcm_op runtime updates Commit c2aba69d0c36 ("can: bcm: add locking for bcm_op runtime updates") added a locking for some variables that can be modified at runtime when updating the sending bcm_op with a new TX_SETUP command in bcm_tx_setup(). Usually the RX_SETUP only handles and filters incoming traffic with one exception: When the RX_RTR_FRAME flag is set a predefined CAN frame is sent when a specific RTR frame is received. Therefore the rx bcm_op uses bcm_can_tx() which uses the bcm_tx_lock that was only initialized in bcm_tx_setup(). Add the missing spin_lock_init() when allocating the bcm_op in bcm_rx_setup() to handle the RTR case properly.
How to fix
- linux linux_kernel5.5, 5.10.253, 5.15.203, 6.1.167, 6.6.130, 6.12.77, 6.15, 6.18.17, 6.19.7 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| linux linux_kernel | 5.4.294 ≤ v < 5.5, 5.10.238 ≤ v < 5.10.253, 5.15.185 ≤ v < 5.15.203, 6.1.141 ≤ v < 6.1.167, 6.6.93 ≤ v < 6.6.130, 6.12.31 ≤ v < 6.12.77, 6.14.9 ≤ v < 6.15, 6.15.1 ≤ v < 6.18.17, 6.19 ≤ v < 6.19.7, 6.15, 7.0 | 5.5, 5.10.253, 5.15.203, 6.1.167, 6.6.130, 6.12.77, 6.15, 6.18.17, 6.19.7 |
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