CVE-2026-63835

Summary

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.

Affected Software

VendorProductVersion RangeStatus
LinuxLinuxf89255a02f1d75d8e1b9d1c31435fcb64840cb2a < d462ced79dd430200cf888984e8005da77fc810baffected
LinuxLinuxf89255a02f1d75d8e1b9d1c31435fcb64840cb2a < f79deaaf822ab0ee2424cf28781f9ab91576bea3affected
LinuxLinuxf89255a02f1d75d8e1b9d1c31435fcb64840cb2a < d3569327fc7395b2b0461a0a0cb77a0bb74786c0affected
LinuxLinuxf89255a02f1d75d8e1b9d1c31435fcb64840cb2a < 97644fdaaf6446ffbe182c5eb804fceb5b1a51b7affected
LinuxLinuxf89255a02f1d75d8e1b9d1c31435fcb64840cb2a < f04dde74399431fb07abbdd9cd5d0ed624771d04affected
LinuxLinuxf89255a02f1d75d8e1b9d1c31435fcb64840cb2a < 3d4548c96d6f21ac1a9b06c5f82f3ef439c87023affected
LinuxLinuxf89255a02f1d75d8e1b9d1c31435fcb64840cb2a < 86ab6b6fb5b82163bf6c45780bb72150021d7349affected
LinuxLinuxf89255a02f1d75d8e1b9d1c31435fcb64840cb2a < d11c00b95b2a3b3934007fc003dccc6fdcc061adaffected
LinuxLinux5.4affected
LinuxLinux0 < 5.4unaffected
LinuxLinux5.10.260 <= 5.10.*unaffected
LinuxLinux5.15.211 <= 5.15.*unaffected
LinuxLinux6.1.177 <= 6.1.*unaffected
LinuxLinux6.6.144 <= 6.6.*unaffected
LinuxLinux6.12.95 <= 6.12.*unaffected
LinuxLinux6.18.38 <= 6.18.*unaffected
LinuxLinux7.1.3 <= 7.1.*unaffected
LinuxLinux7.2-rc1 <= *unaffected

Weaknesses

References