CVE-2026-43382

In the Linux kernel, the following vulnerability has been resolved:<br /> <br /> batman-adv: Avoid double-rtnl_lock ELP metric worker<br /> <br /> batadv_v_elp_get_throughput() might be called when the RTNL lock is already<br /> held. This could be problematic when the work queue item is cancelled via<br /> cancel_delayed_work_sync() in batadv_v_elp_iface_disable(). In this case,<br /> an rtnl_lock() would cause a deadlock.<br /> <br /> To avoid this, rtnl_trylock() was used in this function to skip the<br /> retrieval of the ethtool information in case the RTNL lock was already<br /> held.<br /> <br /> But for cfg80211 interfaces, batadv_get_real_netdev() was called - which<br /> also uses rtnl_lock(). The approach for __ethtool_get_link_ksettings() must<br /> also be used instead and the lockless version __batadv_get_real_netdev()<br /> has to be called.