CVE-2026-23362: Linux Kernel

Medium severity, CVSS 5.5. EPSS: 0.1% chance of exploitation in the next 30 days.

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.

Affected products

• Linux Linux Kernel: from 5.4.294, before 5.5 (fixed in 5.5); from 5.10.238, before 5.10.253 (fixed in 5.10.253); from 5.15.185, before 5.15.203 (fixed in 5.15.203); from 6.1.141, before 6.1.167 (fixed in 6.1.167); from 6.6.93, before 6.6.130 (fixed in 6.6.130); from 6.12.31, before 6.12.77 (fixed in 6.12.77); …

Published 2026-03-25. Last modified 2026-06-17.