CVE-2026-63835
batman-adv: v: prevent OGM aggregation on disabled hardif
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.
INFO
Published Date :
July 19, 2026, 12:16 p.m.
Last Modified :
July 19, 2026, 12:16 p.m.
Remotely Exploit :
No
Source :
416baaa9-dc9f-4396-8d5f-8c081fb06d67
Affected Products
The following products are affected by CVE-2026-63835
vulnerability.
Even if cvefeed.io is aware of the exact versions of the
products
that
are
affected, the information is not represented in the table below.
No affected product recoded yet
Solution
- Block OGM queueing on disabled interfaces.
- Ensure SKB aggregation lists are properly managed.
- Apply kernel patches to fix the described issue.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-63835.
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-63835 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-63835
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-63835 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-63835 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
New CVE Received by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
Jul. 19, 2026
Action Type Old Value New Value Added Affected [{'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': 'f89255a02f1d75d8e1b9d1c31435fcb64840cb2a', 'lessThan': 'd462ced79dd430200cf888984e8005da77fc810b', 'versionType': 'git'}, {'status': 'affected', 'version': 'f89255a02f1d75d8e1b9d1c31435fcb64840cb2a', 'lessThan': 'f79deaaf822ab0ee2424cf28781f9ab91576bea3', 'versionType': 'git'}, {'status': 'affected', 'version': 'f89255a02f1d75d8e1b9d1c31435fcb64840cb2a', 'lessThan': 'd3569327fc7395b2b0461a0a0cb77a0bb74786c0', 'versionType': 'git'}, {'status': 'affected', 'version': 'f89255a02f1d75d8e1b9d1c31435fcb64840cb2a', 'lessThan': '97644fdaaf6446ffbe182c5eb804fceb5b1a51b7', 'versionType': 'git'}, {'status': 'affected', 'version': 'f89255a02f1d75d8e1b9d1c31435fcb64840cb2a', 'lessThan': 'f04dde74399431fb07abbdd9cd5d0ed624771d04', 'versionType': 'git'}, {'status': 'affected', 'version': 'f89255a02f1d75d8e1b9d1c31435fcb64840cb2a', 'lessThan': '3d4548c96d6f21ac1a9b06c5f82f3ef439c87023', 'versionType': 'git'}, {'status': 'affected', 'version': 'f89255a02f1d75d8e1b9d1c31435fcb64840cb2a', 'lessThan': '86ab6b6fb5b82163bf6c45780bb72150021d7349', 'versionType': 'git'}, {'status': 'affected', 'version': 'f89255a02f1d75d8e1b9d1c31435fcb64840cb2a', 'lessThan': 'd11c00b95b2a3b3934007fc003dccc6fdcc061ad', 'versionType': 'git'}], 'programFiles': ['net/batman-adv/bat_v.c', 'net/batman-adv/bat_v_ogm.c', 'net/batman-adv/types.h'], 'defaultStatus': 'unaffected'}, {'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '5.4'}, {'status': 'unaffected', 'version': '0', 'lessThan': '5.4', 'versionType': 'semver'}, {'status': 'unaffected', 'version': '5.10.260', 'versionType': 'semver', 'lessThanOrEqual': '5.10.*'}, {'status': 'unaffected', 'version': '5.15.211', 'versionType': 'semver', 'lessThanOrEqual': '5.15.*'}, {'status': 'unaffected', 'version': '6.1.177', 'versionType': 'semver', 'lessThanOrEqual': '6.1.*'}, {'status': 'unaffected', 'version': '6.6.144', 'versionType': 'semver', 'lessThanOrEqual': '6.6.*'}, {'status': 'unaffected', 'version': '6.12.95', 'versionType': 'semver', 'lessThanOrEqual': '6.12.*'}, {'status': 'unaffected', 'version': '6.18.38', 'versionType': 'semver', 'lessThanOrEqual': '6.18.*'}, {'status': 'unaffected', 'version': '7.1.3', 'versionType': 'semver', 'lessThanOrEqual': '7.1.*'}, {'status': 'unaffected', 'version': '7.2-rc1', 'versionType': 'original_commit_for_fix', 'lessThanOrEqual': '*'}], 'programFiles': ['net/batman-adv/bat_v.c', 'net/batman-adv/bat_v_ogm.c', 'net/batman-adv/types.h'], 'defaultStatus': 'affected'}] Added 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. Added Reference https://git.kernel.org/stable/c/3d4548c96d6f21ac1a9b06c5f82f3ef439c87023 Added Reference https://git.kernel.org/stable/c/86ab6b6fb5b82163bf6c45780bb72150021d7349 Added Reference https://git.kernel.org/stable/c/97644fdaaf6446ffbe182c5eb804fceb5b1a51b7 Added Reference https://git.kernel.org/stable/c/d11c00b95b2a3b3934007fc003dccc6fdcc061ad Added Reference https://git.kernel.org/stable/c/d3569327fc7395b2b0461a0a0cb77a0bb74786c0 Added Reference https://git.kernel.org/stable/c/d462ced79dd430200cf888984e8005da77fc810b Added Reference https://git.kernel.org/stable/c/f04dde74399431fb07abbdd9cd5d0ed624771d04 Added Reference https://git.kernel.org/stable/c/f79deaaf822ab0ee2424cf28781f9ab91576bea3