CVE-2026-23362

Summary

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 Software

VendorProductVersion RangeStatus
LinuxLinux7595de7bc56e0e52b74e56c90f7e247bf626d628 < 0904037e713f787d1376e1d349c3bdf6c3105881affected
LinuxLinuxfbd8fdc2b218e979cfe422b139b8f74c12419d1f < c85b96eaf766d8f066b1139a17a51efa2f6627efaffected
LinuxLinux2a437b86ac5a9893c902f30ef66815bf13587bf6 < 800f26f11ae37b17f58e0001f28a47dd75c26557affected
LinuxLinux76c84c3728178b2d38d5604e399dfe8b0752645e < 70e951afad4c025261fe3c952d2b07237e320a01affected
LinuxLinuxcc55dd28c20a6611e30596019b3b2f636819a4c0 < 8bcf2d847adb82b2c617456f6da17ac5e6c75285affected
LinuxLinuxc2aba69d0c36a496ab4f2e81e9c2b271f2693fd7 < 8215ba7bc99e84e66fd6938874ec4330a9d96518affected
LinuxLinuxc2aba69d0c36a496ab4f2e81e9c2b271f2693fd7 < f0c349b2c21b220af5ba19f29b885e222958d796affected
LinuxLinuxc2aba69d0c36a496ab4f2e81e9c2b271f2693fd7 < c35636e91e392e1540949bbc67932167cb48bc3aaffected
LinuxLinux8f1c022541bf5a923c8d6fa483112c15250f30a4affected
LinuxLinuxc4e8a172501e677ebd8ea9d9161d97dc4df56fbdaffected
LinuxLinux5.10.238 < 5.10.253affected
LinuxLinux5.15.185 < 5.15.203affected
LinuxLinux6.1.141 < 6.1.167affected
LinuxLinux6.6.93 < 6.6.130affected
LinuxLinux6.12.31 < 6.12.77affected
LinuxLinux5.4.294 < 5.5affected
LinuxLinux6.14.9 < 6.15affected
LinuxLinux6.15affected
LinuxLinux0 < 6.15unaffected
LinuxLinux5.10.253 <= 5.10.*unaffected
LinuxLinux5.15.203 <= 5.15.*unaffected
LinuxLinux6.1.167 <= 6.1.*unaffected
LinuxLinux6.6.130 <= 6.6.*unaffected
LinuxLinux6.12.77 <= 6.12.*unaffected
LinuxLinux6.18.17 <= 6.18.*unaffected
LinuxLinux6.19.7 <= 6.19.*unaffected
LinuxLinux7.0 <= *unaffected

Weaknesses

References