CVE-2026-98018

Summary

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().

Affected Software

VendorProductVersion RangeStatus
LinuxLinuxc8755b29b58ec65be17bcb8c40763d2dcb1f1db5 < e6541b2747682fdb2c6ded4a7cf7c39c4067a35caffected
LinuxLinuxc8755b29b58ec65be17bcb8c40763d2dcb1f1db5 < 765c5e357e67916a7aac8ead4ac2fa7d2bffe000affected
LinuxLinuxc8755b29b58ec65be17bcb8c40763d2dcb1f1db5 < 906d8dbafabfa81a30e3ade420cb9912f223a5e1affected
LinuxLinuxc8755b29b58ec65be17bcb8c40763d2dcb1f1db5 < 2b4707a149a55e8fa75c9ef32b359d60f470a566affected
LinuxLinux6.7affected
LinuxLinux0 < 6.7unaffected
LinuxLinux6.12.111 <= 6.12.*unaffected
LinuxLinux6.18.53 <= 6.18.*unaffected
LinuxLinux7.2.7 <= 7.2.*unaffected
LinuxLinux7.3-rc3 <= *unaffected

Weaknesses

References