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CVE-2025-38184

Description

In the Linux kernel, the following vulnerability has been resolved:tipc: fix null-ptr-deref when acquiring remote ip of ethernet bearerThe reproduction steps:1. create a tun interface2. enable l2 bearer3. TIPC_NL_UDP_GET_REMOTEIP with media name set to tuntipc: Started in network modetipc: Node identity 8af312d38a21, cluster identity 4711tipc: Enabled bearer , priority 1Oops: general protection faultKASAN: null-ptr-deref in rangeCPU: 1 UID: 1000 PID: 559 Comm: poc Not tainted 6.16.0-rc1+ #117 PREEMPTHardware name: QEMU Ubuntu 24.04 PCRIP: 0010:tipc_udp_nl_dump_remoteip+0x4a4/0x8f0the ub was in fact a struct dev.when bid != 0 && skip_cnt != 0, bearer_list[bid] may be NULL orother media when other thread changes it.fix this by checking media_id.

POC

Reference

No PoCs from references.

Github

- https://github.com/w4zu/Debian_security