CVE-2026-72119
Description
In the Linux kernel, the following vulnerability has been resolved: can: bcm: extend bcm_tx_lock usage for data and timer updates Stage new CAN frame content for an existing tx op into a kmalloc()'d buffer and validate it there, mirroring the approach already used in bcm_rx_setup(). Only copy the validated data into op->frames while holding op->bcm_tx_lock, so bcm_can_tx() and bcm_tx_timeout_handler() can no longer observe a partially updated or unvalidated frame. Add a missing error path for memcpy_from_msg() when copying CAN frame data from userspace. Also move the kt_ival1/kt_ival2/ival1/ival2 updates in bcm_tx_setup() under op->bcm_tx_lock, and read kt_ival1/kt_ival2/count under the same lock in bcm_tx_set_expiry() and bcm_tx_timeout_handler(), closing the torn 64-bit ktime_t read on 32-bit platforms.
How to fix
- Linux Linuxa538b072ee074c9b41b9d9c15a6861a963e30755, 63422347b4c782f429748b2a09cd3cf3b77e6abd, 37917e432e50b7de2b64230974380132a30f7270, 52f06e7603780de100233713ddaf971d422e10ef, 972fd66bb08fdef1090abe43196ca8da07216d13, bd46f55dec608daa44b45dcf3328517630ad8e40, 337f966c00662d81ad82cf5a4bbb150b2e32c0d4, 12ce799f7ab1e05bd8fbf79e46f403bfe5597ebc, 5.10.265, 5.15.216, 6.1.183, 6.6.148, 6.12.101, 5.5, 6.15 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| Linux Linux | 7595de7bc56e0e52b74e56c90f7e247bf626d628 ≤ v < a538b072ee074c9b41b9d9c15a6861a963e30755, fbd8fdc2b218e979cfe422b139b8f74c12419d1f ≤ v < 63422347b4c782f429748b2a09cd3cf3b77e6abd, 2a437b86ac5a9893c902f30ef66815bf13587bf6 ≤ v < 37917e432e50b7de2b64230974380132a30f7270, 76c84c3728178b2d38d5604e399dfe8b0752645e ≤ v < 52f06e7603780de100233713ddaf971d422e10ef, cc55dd28c20a6611e30596019b3b2f636819a4c0 ≤ v < 972fd66bb08fdef1090abe43196ca8da07216d13, c2aba69d0c36a496ab4f2e81e9c2b271f2693fd7 ≤ v < bd46f55dec608daa44b45dcf3328517630ad8e40, c2aba69d0c36a496ab4f2e81e9c2b271f2693fd7 ≤ v < 337f966c00662d81ad82cf5a4bbb150b2e32c0d4, c2aba69d0c36a496ab4f2e81e9c2b271f2693fd7 ≤ v < 12ce799f7ab1e05bd8fbf79e46f403bfe5597ebc, 8f1c022541bf5a923c8d6fa483112c15250f30a4, c4e8a172501e677ebd8ea9d9161d97dc4df56fbd, 5.10.238 ≤ v < 5.10.265, 5.15.185 ≤ v < 5.15.216, 6.1.141 ≤ v < 6.1.183, 6.6.93 ≤ v < 6.6.148, 6.12.31 ≤ v < 6.12.101, 5.4.294 ≤ v < 5.5, 6.14.9 ≤ v < 6.15, 6.15 | a538b072ee074c9b41b9d9c15a6861a963e30755, 63422347b4c782f429748b2a09cd3cf3b77e6abd, 37917e432e50b7de2b64230974380132a30f7270, 52f06e7603780de100233713ddaf971d422e10ef, 972fd66bb08fdef1090abe43196ca8da07216d13, bd46f55dec608daa44b45dcf3328517630ad8e40, 337f966c00662d81ad82cf5a4bbb150b2e32c0d4, 12ce799f7ab1e05bd8fbf79e46f403bfe5597ebc, 5.10.265, 5.15.216, 6.1.183, 6.6.148, 6.12.101, 5.5, 6.15 |
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