CVE-2026-98018 PUBLISHED

net: mctp: i3c: serialize probe with bus removal

Assigner: Linux
Reserved: 25.09.2026 Published: 25.09.2026 Updated: 25.09.2026

In the Linux kernel, the following vulnerability has been resolved:

net: mctp: i3c: serialize probe with bus removal

mctp_i3c_probe() drops busdevs_lock after finding the matching bus. A concurrent I3C_NOTIFY_BUS_REMOVE can then unregister and free the bus netdev before probe passes its private data to mctp_i3c_add_device(). The latter consequently adds a list node through a freed mbus pointer.

Keep busdevs_lock held until the device has been added. This also satisfies the __must_hold annotation on mctp_i3c_add_device().

Product Status

Vendor Linux
Product Linux
Versions Default: unaffected
  • affected from c8755b29b58ec65be17bcb8c40763d2dcb1f1db5 to e6541b2747682fdb2c6ded4a7cf7c39c4067a35c (excl.)
  • affected from c8755b29b58ec65be17bcb8c40763d2dcb1f1db5 to 765c5e357e67916a7aac8ead4ac2fa7d2bffe000 (excl.)
  • affected from c8755b29b58ec65be17bcb8c40763d2dcb1f1db5 to 906d8dbafabfa81a30e3ade420cb9912f223a5e1 (excl.)
  • affected from c8755b29b58ec65be17bcb8c40763d2dcb1f1db5 to 2b4707a149a55e8fa75c9ef32b359d60f470a566 (excl.)
Vendor Linux
Product Linux
Versions Default: affected
  • Version 6.7 is affected
  • unaffected from 0 to 6.7 (excl.)
  • unaffected from 6.12.111 to 6.12.* (incl.)
  • unaffected from 6.18.53 to 6.18.* (incl.)
  • unaffected from 7.2.7 to 7.2.* (incl.)
  • unaffected from 7.3-rc3 to * (incl.)

References