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.
How to fix
- Linux Linuxd462ced79dd430200cf888984e8005da77fc810b, f79deaaf822ab0ee2424cf28781f9ab91576bea3, d3569327fc7395b2b0461a0a0cb77a0bb74786c0, 97644fdaaf6446ffbe182c5eb804fceb5b1a51b7, f04dde74399431fb07abbdd9cd5d0ed624771d04, 3d4548c96d6f21ac1a9b06c5f82f3ef439c87023, 86ab6b6fb5b82163bf6c45780bb72150021d7349, d11c00b95b2a3b3934007fc003dccc6fdcc061ad or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| Linux Linux | f89255a02f1d75d8e1b9d1c31435fcb64840cb2a ≤ v < d462ced79dd430200cf888984e8005da77fc810b, f89255a02f1d75d8e1b9d1c31435fcb64840cb2a ≤ v < f79deaaf822ab0ee2424cf28781f9ab91576bea3, f89255a02f1d75d8e1b9d1c31435fcb64840cb2a ≤ v < d3569327fc7395b2b0461a0a0cb77a0bb74786c0, f89255a02f1d75d8e1b9d1c31435fcb64840cb2a ≤ v < 97644fdaaf6446ffbe182c5eb804fceb5b1a51b7, f89255a02f1d75d8e1b9d1c31435fcb64840cb2a ≤ v < f04dde74399431fb07abbdd9cd5d0ed624771d04, f89255a02f1d75d8e1b9d1c31435fcb64840cb2a ≤ v < 3d4548c96d6f21ac1a9b06c5f82f3ef439c87023, f89255a02f1d75d8e1b9d1c31435fcb64840cb2a ≤ v < 86ab6b6fb5b82163bf6c45780bb72150021d7349, f89255a02f1d75d8e1b9d1c31435fcb64840cb2a ≤ v < d11c00b95b2a3b3934007fc003dccc6fdcc061ad, 5.4 | d462ced79dd430200cf888984e8005da77fc810b, f79deaaf822ab0ee2424cf28781f9ab91576bea3, d3569327fc7395b2b0461a0a0cb77a0bb74786c0, 97644fdaaf6446ffbe182c5eb804fceb5b1a51b7, f04dde74399431fb07abbdd9cd5d0ed624771d04, 3d4548c96d6f21ac1a9b06c5f82f3ef439c87023, 86ab6b6fb5b82163bf6c45780bb72150021d7349, d11c00b95b2a3b3934007fc003dccc6fdcc061ad |
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