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CVE PROGRAM SOURCE RECORD7.8 High

CVE-2026-72119

can: bcm: extend bcm_tx_lock usage for data and timer updates

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Status
Published
Published
Updated
Assigning organization
Linux

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.

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

  • 7595de7bc56e0e52b74e56c90f7e247bf626d628 to < a538b072ee074c9b41b9d9c15a6861a963e30755affected
  • fbd8fdc2b218e979cfe422b139b8f74c12419d1f to < 63422347b4c782f429748b2a09cd3cf3b77e6abdaffected
  • 2a437b86ac5a9893c902f30ef66815bf13587bf6 to < 37917e432e50b7de2b64230974380132a30f7270affected
  • 76c84c3728178b2d38d5604e399dfe8b0752645e to < 52f06e7603780de100233713ddaf971d422e10efaffected
  • cc55dd28c20a6611e30596019b3b2f636819a4c0 to < 972fd66bb08fdef1090abe43196ca8da07216d13affected
  • c2aba69d0c36a496ab4f2e81e9c2b271f2693fd7 to < bd46f55dec608daa44b45dcf3328517630ad8e40affected
  • c2aba69d0c36a496ab4f2e81e9c2b271f2693fd7 to < 337f966c00662d81ad82cf5a4bbb150b2e32c0d4affected
  • c2aba69d0c36a496ab4f2e81e9c2b271f2693fd7 to < 12ce799f7ab1e05bd8fbf79e46f403bfe5597ebcaffected
  • 8f1c022541bf5a923c8d6fa483112c15250f30a4affected
  • c4e8a172501e677ebd8ea9d9161d97dc4df56fbdaffected
  • 5.10.238 to < 5.10.265affected
  • 5.15.185 to < 5.15.216affected
  • 6.1.141 to < 6.1.183affected
  • 6.6.93 to < 6.6.148affected
  • 6.12.31 to < 6.12.101affected
  • 5.4.294 to < 5.5affected
  • 6.14.9 to < 6.15affected

Linux Linux

Default version status: affected

  • 6.15affected
  • 0 to < 6.15unaffected
  • 5.10.265 to ≤ 5.10.*unaffected
  • 5.15.216 to ≤ 5.15.*unaffected
  • 6.1.183 to ≤ 6.1.*unaffected
  • 6.6.148 to ≤ 6.6.*unaffected
  • 6.12.101 to ≤ 6.12.*unaffected
  • 6.18.42 to ≤ 6.18.*unaffected
  • 7.1.5 to ≤ 7.1.*unaffected
  • 7.2 to ≤ *unaffected

References