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8.1
HIGH CVSS 3.1
CVE-2026-72227
batman-adv: mcast: avoid OOB read of num_dests header
Overview
Description

In the Linux kernel, the following vulnerability has been resolved: batman-adv: mcast: avoid OOB read of num_dests header Before the access to struct batadv_tvlv_mcast_tracker's num_dests, it is attempted to check whether enough space is actually in the network header. But instead of using offsetofend() to check for the whole size (2) which must be accessible, offsetof() of is called. The latter is always returning 0. The comparison with the network header length will always return that enough data is available - even when only 1 or 0 bytes are accessible. Instead of using offsetofend(), use the more common check for the whole header.

Details
INFO

Published Date :

Aug. 15, 2026, 6:21 a.m.

Last Modified :

Aug. 17, 2026, 6:18 a.m.

Remotely Exploit :

No

Source :

416baaa9-dc9f-4396-8d5f-8c081fb06d67
Impact
Affected Products

The following products are affected by CVE-2026-72227 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.

ID Vendor Product Action
1 Linux linux_kernel
: Total Affected Vendor : 1 | Products : 1
Scoring
CVSS Scores
The Common Vulnerability Scoring System is a standardized framework for assessing the severity of vulnerabilities in software and systems. We collect and displays CVSS scores from various sources for each CVE.
Score Version Severity Vector Exploitability Score Impact Score Source
CVSS 3.1 HIGH 416baaa9-dc9f-4396-8d5f-8c081fb06d67
Solution
Update the Linux kernel to prevent out-of-bounds reads in the batman-adv module.
  • Apply the kernel patch for batman-adv.
  • Update the Linux kernel to the latest version.
  • Reboot the system after updating.
References
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-2026-72227.

URL Resource
https://git.kernel.org/stable/c/38eaed28e250895d56f4b7989bd65479a511c5c3
https://git.kernel.org/stable/c/7d1a877670bc2e901241073f022ca8d1b2f85f1c
https://git.kernel.org/stable/c/80f62893d135f415e7a374dd47b468ec298f7aed
https://git.kernel.org/stable/c/d2b657c9653fcebca828a2ead13f444e0da68817
CWE - Common Weakness Enumeration

While CVE identifies specific instances of vulnerabilities, CWE categorizes the common flaws or weaknesses that can lead to vulnerabilities. CVE-2026-72227 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-2026-72227 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-2026-72227 vulnerability anywhere in the article.

Results are limited to the first 20 news articles due to potential performance issues.

The following table lists the changes that have been made to the CVE-2026-72227 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.

  • CVE Modified by 416baaa9-dc9f-4396-8d5f-8c081fb06d67

    Aug. 17, 2026

    Action Type Old Value New Value
    Added CVSS V3.1 AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H
    Changed Affected [{'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '07afe1ba288c04280622fa002ed385f1ac0b6fe6', 'lessThan': '80f62893d135f415e7a374dd47b468ec298f7aed', 'versionType': 'git'}, {'status': 'affected', 'version': '07afe1ba288c04280622fa002ed385f1ac0b6fe6', 'lessThan': 'd2b657c9653fcebca828a2ead13f444e0da68817', 'versionType': 'git'}, {'status': 'affected', 'version': '07afe1ba288c04280622fa002ed385f1ac0b6fe6', 'lessThan': '7d1a877670bc2e901241073f022ca8d1b2f85f1c', 'versionType': 'git'}, {'status': 'affected', 'version': '07afe1ba288c04280622fa002ed385f1ac0b6fe6', 'lessThan': '38eaed28e250895d56f4b7989bd65479a511c5c3', 'versionType': 'git'}], 'programFiles': ['net/batman-adv/multicast_forw.c'], 'defaultStatus': 'unaffected'}, {'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '6.8'}, {'status': 'unaffected', 'version': '0', 'lessThan': '6.8', 'versionType': 'semver'}, {'status': 'unaffected', 'version': '6.12.97', 'versionType': 'semver', 'lessThanOrEqual': '6.12.*'}, {'status': 'unaffected', 'version': '6.18.40', 'versionType': 'semver', 'lessThanOrEqual': '6.18.*'}, {'status': 'unaffected', 'version': '7.1.5', 'versionType': 'semver', 'lessThanOrEqual': '7.1.*'}, {'status': 'unaffected', 'version': '7.2-rc3', 'versionType': 'original_commit_for_fix', 'lessThanOrEqual': '*'}], 'programFiles': ['net/batman-adv/multicast_forw.c'], 'defaultStatus': 'affected'}] [{'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '07afe1ba288c04280622fa002ed385f1ac0b6fe6', 'lessThan': '80f62893d135f415e7a374dd47b468ec298f7aed', 'versionType': 'git'}, {'status': 'affected', 'version': '07afe1ba288c04280622fa002ed385f1ac0b6fe6', 'lessThan': 'd2b657c9653fcebca828a2ead13f444e0da68817', 'versionType': 'git'}, {'status': 'affected', 'version': '07afe1ba288c04280622fa002ed385f1ac0b6fe6', 'lessThan': '7d1a877670bc2e901241073f022ca8d1b2f85f1c', 'versionType': 'git'}, {'status': 'affected', 'version': '07afe1ba288c04280622fa002ed385f1ac0b6fe6', 'lessThan': '38eaed28e250895d56f4b7989bd65479a511c5c3', 'versionType': 'git'}], 'programFiles': ['net/batman-adv/multicast_forw.c'], 'defaultStatus': 'unaffected'}, {'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '6.8'}, {'status': 'unaffected', 'version': '0', 'lessThan': '6.8', 'versionType': 'semver'}, {'status': 'unaffected', 'version': '6.12.97', 'versionType': 'semver', 'lessThanOrEqual': '6.12.*'}, {'status': 'unaffected', 'version': '6.18.40', 'versionType': 'semver', 'lessThanOrEqual': '6.18.*'}, {'status': 'unaffected', 'version': '7.1.5', 'versionType': 'semver', 'lessThanOrEqual': '7.1.*'}, {'status': 'unaffected', 'version': '7.2', 'versionType': 'original_commit_for_fix', 'lessThanOrEqual': '*'}], 'programFiles': ['net/batman-adv/multicast_forw.c'], 'defaultStatus': 'affected'}]
  • New CVE Received by 416baaa9-dc9f-4396-8d5f-8c081fb06d67

    Aug. 15, 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': '07afe1ba288c04280622fa002ed385f1ac0b6fe6', 'lessThan': '80f62893d135f415e7a374dd47b468ec298f7aed', 'versionType': 'git'}, {'status': 'affected', 'version': '07afe1ba288c04280622fa002ed385f1ac0b6fe6', 'lessThan': 'd2b657c9653fcebca828a2ead13f444e0da68817', 'versionType': 'git'}, {'status': 'affected', 'version': '07afe1ba288c04280622fa002ed385f1ac0b6fe6', 'lessThan': '7d1a877670bc2e901241073f022ca8d1b2f85f1c', 'versionType': 'git'}, {'status': 'affected', 'version': '07afe1ba288c04280622fa002ed385f1ac0b6fe6', 'lessThan': '38eaed28e250895d56f4b7989bd65479a511c5c3', 'versionType': 'git'}], 'programFiles': ['net/batman-adv/multicast_forw.c'], 'defaultStatus': 'unaffected'}, {'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '6.8'}, {'status': 'unaffected', 'version': '0', 'lessThan': '6.8', 'versionType': 'semver'}, {'status': 'unaffected', 'version': '6.12.97', 'versionType': 'semver', 'lessThanOrEqual': '6.12.*'}, {'status': 'unaffected', 'version': '6.18.40', 'versionType': 'semver', 'lessThanOrEqual': '6.18.*'}, {'status': 'unaffected', 'version': '7.1.5', 'versionType': 'semver', 'lessThanOrEqual': '7.1.*'}, {'status': 'unaffected', 'version': '7.2-rc3', 'versionType': 'original_commit_for_fix', 'lessThanOrEqual': '*'}], 'programFiles': ['net/batman-adv/multicast_forw.c'], 'defaultStatus': 'affected'}]
    Added Description In the Linux kernel, the following vulnerability has been resolved: batman-adv: mcast: avoid OOB read of num_dests header Before the access to struct batadv_tvlv_mcast_tracker's num_dests, it is attempted to check whether enough space is actually in the network header. But instead of using offsetofend() to check for the whole size (2) which must be accessible, offsetof() of is called. The latter is always returning 0. The comparison with the network header length will always return that enough data is available - even when only 1 or 0 bytes are accessible. Instead of using offsetofend(), use the more common check for the whole header.
    Added Reference https://git.kernel.org/stable/c/38eaed28e250895d56f4b7989bd65479a511c5c3
    Added Reference https://git.kernel.org/stable/c/7d1a877670bc2e901241073f022ca8d1b2f85f1c
    Added Reference https://git.kernel.org/stable/c/80f62893d135f415e7a374dd47b468ec298f7aed
    Added Reference https://git.kernel.org/stable/c/d2b657c9653fcebca828a2ead13f444e0da68817
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days. Following chart shows the EPSS score history of the vulnerability.
CVSS
Vulnerability Scoring Details
Base CVSS Score: 8.1
Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality Impact
Integrity Impact
Availability Impact