batman-adv: v: prevent OGM aggregation on disabled hardif
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.
- Products
- Kernel
- Affected versions
- Not specified
- Fixed versions
- 5.10.260, 5.15.211, 6.1.177, 6.12.95, 6.18.38, 6.6.144, 7.1.3
- CVEs
- CVE-2026-63835
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 4 Nov 2026, 18:41 UTC · Revision 1
Source evidence
batman-adv: v: prevent OGM aggregation on disabled hardif
core-osv · Original sourcePublished 19 Jul 2026, 12:02 UTC
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.
osv:CVE-2026-63835
Kernel
Fixed versions: 5.10.260, 5.15.211, 6.1.177, 6.6.144, 6.12.95, 6.18.38, 7.1.3
Complete source record
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"url": "https://osv.dev/vulnerability/CVE-2026-63835",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "batman-adv: v: prevent OGM aggregation on disabled hardif",
"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.",
"evidence": "osv:CVE-2026-63835",
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"modified": "2026-10-28T02:30:38.238530365Z",
"provider": "osv",
"references": [
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"https://nvd.nist.gov/vuln/detail/CVE-2026-63835",
"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
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"security_relevant": true,
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"source_id": "core-osv",
"document_id": 505792,
"published_at": "2026-07-19T12:02:26.574+00:00"
}