SB2026092898 - NULL pointer dereference in Linux kernel tipc

Description

This security bulletin contains information about 1 vulnerability.

1) NULL pointer dereference (CVE-ID: CVE-2026-98098)

CWE-ID: CWE-476 - NULL Pointer Dereference

CVSSv4: 6.8 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]

The vulnerability allows a local user to cause a denial of service.

The vulnerability exists due to a NULL pointer dereference in tipc_named_node_up() when processing node state publications after the local publication limit is reached. A local user can bind a large number of local-scope service addresses to sockets to cause a denial of service.

Subscribers to node or link up/down events may stop receiving notifications.

Remediation

Install update from vendor's website.

References

• https://git.kernel.org/stable/c/68619f965329d2f7b113a3d5811aa23198f39105
• https://git.kernel.org/stable/c/ad805326d874062f8bc72a94884f86046148cde3
• https://git.kernel.org/stable/c/b3b76e9f4f2476f1135b2ba7743a821db4a0df4b
• https://git.kernel.org/stable/c/d0d82f1214f321143c5dbc2e48e4a4e6c4226895