CVE-2026-63835

Description

In the Linux kernel, the following vulnerability has been resolved: batman-adv: v: prevent OGM aggregation on disabled hardif When an interface gets disabled, the worker is correctly disabled by batadv_hardif_disable_interface() -> ... -> batadv_v_ogm_iface_disable(). In this process, the skb aggr_list is also freed. But batadv_v_ogm_send_meshif() can still queue new skbs (via batadv_v_ogm_queue_on_if()) to the aggr_list. This will only stop after all cores can no longer find the RCU protected list of hard interfaces. These queued skbs will never be freed or consumed by batadv_v_ogm_aggr_work. The batadv_v_ogm_iface_disable() function must block batadv_v_ogm_queue_on_if() to avoid leak of skbs.

References

• https://git.kernel.org/stable/c/3d4548c96d6f21ac1a9b06c5f82f3ef439c87023
• https://git.kernel.org/stable/c/86ab6b6fb5b82163bf6c45780bb72150021d7349
• https://git.kernel.org/stable/c/97644fdaaf6446ffbe182c5eb804fceb5b1a51b7
• https://git.kernel.org/stable/c/d11c00b95b2a3b3934007fc003dccc6fdcc061ad
• https://git.kernel.org/stable/c/d3569327fc7395b2b0461a0a0cb77a0bb74786c0