CVE-2026-98098

/// Technical description

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

tipc: fix NULL deref in tipc_named_node_up() on empty publication list

User-space applications can bind a large number of service addresses to

one or more sockets. Each binding of a local-scope service address inserts

one entry (publication) into the TIPC name table. If the number of these

publications exceeds TIPC_MAX_PUBL (65535), protocol service types

(such as node state and link state) are no longer inserted into the name

table. This causes two issues:

1. User-space applications subscribing to node or link up/down events

stop receiving notifications.

2. A NULL pointer dereference can occur:

BUG: kernel NULL pointer dereference, address: 00000000000000d0

...

CPU: 0 UID: 0 PID: 0 Comm: swapper/0 Not tainted 7.2.0-rc4-default+ #5 PREEMPT(full)

...

RIP: 0010:tipc_named_node_up (./include/linux/skbuff.h:2251 net/tipc/name_distr.c:195 net/tipc/name_distr.c:221)

...

Call Trace:

<IRQ>

ti

/// Remediation

Check the references section for vendor advisories and patches from linux. Update linux_kernel to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

/// Affected products

/// References