CVE-2025-21903 Information

Description

In the Linux kernel the following vulnerability has been resolved:

mctp i3c: handle NULL header address

daddr can be NULL if there is no neighbour table entry present in that case the tx packet should be dropped.

saddr will usually be set by MCTP core but check for NULL in case a packet is transmitted by a different protocol.

Reference

https://git.kernel.org/stable/c/740bf9c9b715cc327d34b1e2d4ee79fcd4c47a56 https://git.kernel.org/stable/c/cf7ee25e70c6edfac4553d6b671e8b19db1d9573 https://git.kernel.org/stable/c/d8be54c35aee29d96d1350b1b6f153be4da37c07