CVE-2026-63835

batman-adv: v: prevent OGM aggregation on disabled hardif

State: Published
Severity: Not scored
Published: Jul 19, 2026
Updated: Aug 17, 2026
Reserved: Jul 19, 2026

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.

Scores

The record has no CVSS score.

Weaknesses

The record names no weakness.

Affected Products

Product	Versions
LinuxLinux	f89255a02f1d75d8e1b9d1c31435fcb64840cb2a to before d462ced79dd430200cf888984e8005da77fc810bAffected f89255a02f1d75d8e1b9d1c31435fcb64840cb2a to before f79deaaf822ab0ee2424cf28781f9ab91576bea3Affected f89255a02f1d75d8e1b9d1c31435fcb64840cb2a to before d3569327fc7395b2b0461a0a0cb77a0bb74786c0Affected f89255a02f1d75d8e1b9d1c31435fcb64840cb2a to before 97644fdaaf6446ffbe182c5eb804fceb5b1a51b7Affected f89255a02f1d75d8e1b9d1c31435fcb64840cb2a to before f04dde74399431fb07abbdd9cd5d0ed624771d04Affected f89255a02f1d75d8e1b9d1c31435fcb64840cb2a to before 3d4548c96d6f21ac1a9b06c5f82f3ef439c87023Affected f89255a02f1d75d8e1b9d1c31435fcb64840cb2a to before 86ab6b6fb5b82163bf6c45780bb72150021d7349Affected f89255a02f1d75d8e1b9d1c31435fcb64840cb2a to before d11c00b95b2a3b3934007fc003dccc6fdcc061adAffected
LinuxLinux	5.4Affected before 5.4Not affected 5.10.260 through 5.10.Not affected 5.15.211 through 5.15.Not affected 6.1.177 through 6.1.Not affected 6.6.144 through 6.6.Not affected 6.12.95 through 6.12.Not affected 6.18.38 through 6.18.Not affected 7.1.3 through 7.1.*Not affected 7.2 and laterNot affected

Product

Versions

LinuxLinux

f89255a02f1d75d8e1b9d1c31435fcb64840cb2a to before d462ced79dd430200cf888984e8005da77fc810bAffected
f89255a02f1d75d8e1b9d1c31435fcb64840cb2a to before f79deaaf822ab0ee2424cf28781f9ab91576bea3Affected
f89255a02f1d75d8e1b9d1c31435fcb64840cb2a to before d3569327fc7395b2b0461a0a0cb77a0bb74786c0Affected
f89255a02f1d75d8e1b9d1c31435fcb64840cb2a to before 97644fdaaf6446ffbe182c5eb804fceb5b1a51b7Affected
f89255a02f1d75d8e1b9d1c31435fcb64840cb2a to before f04dde74399431fb07abbdd9cd5d0ed624771d04Affected
f89255a02f1d75d8e1b9d1c31435fcb64840cb2a to before 3d4548c96d6f21ac1a9b06c5f82f3ef439c87023Affected
f89255a02f1d75d8e1b9d1c31435fcb64840cb2a to before 86ab6b6fb5b82163bf6c45780bb72150021d7349Affected
f89255a02f1d75d8e1b9d1c31435fcb64840cb2a to before d11c00b95b2a3b3934007fc003dccc6fdcc061adAffected

LinuxLinux

5.4Affected
before 5.4Not affected
5.10.260 through 5.10.*Not affected
5.15.211 through 5.15.*Not affected
6.1.177 through 6.1.*Not affected
6.6.144 through 6.6.*Not affected
6.12.95 through 6.12.*Not affected
6.18.38 through 6.18.*Not affected
7.1.3 through 7.1.*Not affected
7.2 and laterNot affected

References

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