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9.8
CRITICAL CVSS 3.1
CVE-2026-72234
batman-adv: access unicast_ttvn skb->data only after skb realloc
Overview
Description

In the Linux kernel, the following vulnerability has been resolved: batman-adv: access unicast_ttvn skb->data only after skb realloc The pskb_may_pull() called by batadv_get_vid() could reallocate the buffer behind the skb. Variables which were pointing to the old buffer need to be reassigned to avoid an use-after-free. This was done correctly for the ethernet header but missed for the unicast_packet pointer.

Details
INFO

Published Date :

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

Last Modified :

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

Remotely Exploit :

Yes !

Source :

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

The following products are affected by CVE-2026-72234 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 CRITICAL 416baaa9-dc9f-4396-8d5f-8c081fb06d67
Solution
Fix a use-after-free by reassigning the unicast_packet pointer after buffer reallocation.
  • Update the Linux kernel to the latest version.
  • Apply the specific patch for the batman-adv driver.
  • Ensure skb buffers are correctly managed after reallocation.
  • Verify unicast_packet pointer assignment post-reallocation.
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-2026-72234.

URL Resource
https://git.kernel.org/stable/c/7141990add3f75436f2933cb310654cad3b1e3e9
https://git.kernel.org/stable/c/7b162b36de750565404cd3b98315706622c6974f
https://git.kernel.org/stable/c/979175834a699ccc3c4c0b0ba60ecae0f135a587
https://git.kernel.org/stable/c/9a7b7248798123efbd5fafe58461d57c7cc718af
https://git.kernel.org/stable/c/9c2c05629e46c1fd43931506d41c56a885a98eb4
https://git.kernel.org/stable/c/aa9558af859934f24717d4bab97d61004f91a736
https://git.kernel.org/stable/c/b8afcf799b2cc92c41beebd029e53ed18960184a
https://git.kernel.org/stable/c/ed90eb5c68420cdfe67ec1f773324198d2ef6f50
CWE - Common Weakness Enumeration

While CVE identifies specific instances of vulnerabilities, CWE categorizes the common flaws or weaknesses that can lead to vulnerabilities. CVE-2026-72234 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-2026-72234 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-2026-72234 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-2026-72234 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:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/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': 'c018ad3de61a1dc4194879a53e5559e094aa7b1a', 'lessThan': 'aa9558af859934f24717d4bab97d61004f91a736', 'versionType': 'git'}, {'status': 'affected', 'version': 'c018ad3de61a1dc4194879a53e5559e094aa7b1a', 'lessThan': '9c2c05629e46c1fd43931506d41c56a885a98eb4', 'versionType': 'git'}, {'status': 'affected', 'version': 'c018ad3de61a1dc4194879a53e5559e094aa7b1a', 'lessThan': '7b162b36de750565404cd3b98315706622c6974f', 'versionType': 'git'}, {'status': 'affected', 'version': 'c018ad3de61a1dc4194879a53e5559e094aa7b1a', 'lessThan': 'ed90eb5c68420cdfe67ec1f773324198d2ef6f50', 'versionType': 'git'}, {'status': 'affected', 'version': 'c018ad3de61a1dc4194879a53e5559e094aa7b1a', 'lessThan': '979175834a699ccc3c4c0b0ba60ecae0f135a587', 'versionType': 'git'}, {'status': 'affected', 'version': 'c018ad3de61a1dc4194879a53e5559e094aa7b1a', 'lessThan': 'b8afcf799b2cc92c41beebd029e53ed18960184a', 'versionType': 'git'}, {'status': 'affected', 'version': 'c018ad3de61a1dc4194879a53e5559e094aa7b1a', 'lessThan': '9a7b7248798123efbd5fafe58461d57c7cc718af', 'versionType': 'git'}, {'status': 'affected', 'version': 'c018ad3de61a1dc4194879a53e5559e094aa7b1a', 'lessThan': '7141990add3f75436f2933cb310654cad3b1e3e9', 'versionType': 'git'}], 'programFiles': ['net/batman-adv/routing.c'], 'defaultStatus': 'unaffected'}, {'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '3.13'}, {'status': 'unaffected', 'version': '0', 'lessThan': '3.13', 'versionType': 'semver'}, {'status': 'unaffected', 'version': '5.10.261', 'versionType': 'semver', 'lessThanOrEqual': '5.10.*'}, {'status': 'unaffected', 'version': '5.15.212', 'versionType': 'semver', 'lessThanOrEqual': '5.15.*'}, {'status': 'unaffected', 'version': '6.1.178', 'versionType': 'semver', 'lessThanOrEqual': '6.1.*'}, {'status': 'unaffected', 'version': '6.6.145', 'versionType': 'semver', 'lessThanOrEqual': '6.6.*'}, {'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-rc2', 'versionType': 'original_commit_for_fix', 'lessThanOrEqual': '*'}], 'programFiles': ['net/batman-adv/routing.c'], 'defaultStatus': 'affected'}] [{'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': 'c018ad3de61a1dc4194879a53e5559e094aa7b1a', 'lessThan': 'aa9558af859934f24717d4bab97d61004f91a736', 'versionType': 'git'}, {'status': 'affected', 'version': 'c018ad3de61a1dc4194879a53e5559e094aa7b1a', 'lessThan': '9c2c05629e46c1fd43931506d41c56a885a98eb4', 'versionType': 'git'}, {'status': 'affected', 'version': 'c018ad3de61a1dc4194879a53e5559e094aa7b1a', 'lessThan': '7b162b36de750565404cd3b98315706622c6974f', 'versionType': 'git'}, {'status': 'affected', 'version': 'c018ad3de61a1dc4194879a53e5559e094aa7b1a', 'lessThan': 'ed90eb5c68420cdfe67ec1f773324198d2ef6f50', 'versionType': 'git'}, {'status': 'affected', 'version': 'c018ad3de61a1dc4194879a53e5559e094aa7b1a', 'lessThan': '979175834a699ccc3c4c0b0ba60ecae0f135a587', 'versionType': 'git'}, {'status': 'affected', 'version': 'c018ad3de61a1dc4194879a53e5559e094aa7b1a', 'lessThan': 'b8afcf799b2cc92c41beebd029e53ed18960184a', 'versionType': 'git'}, {'status': 'affected', 'version': 'c018ad3de61a1dc4194879a53e5559e094aa7b1a', 'lessThan': '9a7b7248798123efbd5fafe58461d57c7cc718af', 'versionType': 'git'}, {'status': 'affected', 'version': 'c018ad3de61a1dc4194879a53e5559e094aa7b1a', 'lessThan': '7141990add3f75436f2933cb310654cad3b1e3e9', 'versionType': 'git'}], 'programFiles': ['net/batman-adv/routing.c'], 'defaultStatus': 'unaffected'}, {'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '3.13'}, {'status': 'unaffected', 'version': '0', 'lessThan': '3.13', 'versionType': 'semver'}, {'status': 'unaffected', 'version': '5.10.261', 'versionType': 'semver', 'lessThanOrEqual': '5.10.*'}, {'status': 'unaffected', 'version': '5.15.212', 'versionType': 'semver', 'lessThanOrEqual': '5.15.*'}, {'status': 'unaffected', 'version': '6.1.178', 'versionType': 'semver', 'lessThanOrEqual': '6.1.*'}, {'status': 'unaffected', 'version': '6.6.145', 'versionType': 'semver', 'lessThanOrEqual': '6.6.*'}, {'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/routing.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': 'c018ad3de61a1dc4194879a53e5559e094aa7b1a', 'lessThan': 'aa9558af859934f24717d4bab97d61004f91a736', 'versionType': 'git'}, {'status': 'affected', 'version': 'c018ad3de61a1dc4194879a53e5559e094aa7b1a', 'lessThan': '9c2c05629e46c1fd43931506d41c56a885a98eb4', 'versionType': 'git'}, {'status': 'affected', 'version': 'c018ad3de61a1dc4194879a53e5559e094aa7b1a', 'lessThan': '7b162b36de750565404cd3b98315706622c6974f', 'versionType': 'git'}, {'status': 'affected', 'version': 'c018ad3de61a1dc4194879a53e5559e094aa7b1a', 'lessThan': 'ed90eb5c68420cdfe67ec1f773324198d2ef6f50', 'versionType': 'git'}, {'status': 'affected', 'version': 'c018ad3de61a1dc4194879a53e5559e094aa7b1a', 'lessThan': '979175834a699ccc3c4c0b0ba60ecae0f135a587', 'versionType': 'git'}, {'status': 'affected', 'version': 'c018ad3de61a1dc4194879a53e5559e094aa7b1a', 'lessThan': 'b8afcf799b2cc92c41beebd029e53ed18960184a', 'versionType': 'git'}, {'status': 'affected', 'version': 'c018ad3de61a1dc4194879a53e5559e094aa7b1a', 'lessThan': '9a7b7248798123efbd5fafe58461d57c7cc718af', 'versionType': 'git'}, {'status': 'affected', 'version': 'c018ad3de61a1dc4194879a53e5559e094aa7b1a', 'lessThan': '7141990add3f75436f2933cb310654cad3b1e3e9', 'versionType': 'git'}], 'programFiles': ['net/batman-adv/routing.c'], 'defaultStatus': 'unaffected'}, {'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '3.13'}, {'status': 'unaffected', 'version': '0', 'lessThan': '3.13', 'versionType': 'semver'}, {'status': 'unaffected', 'version': '5.10.261', 'versionType': 'semver', 'lessThanOrEqual': '5.10.*'}, {'status': 'unaffected', 'version': '5.15.212', 'versionType': 'semver', 'lessThanOrEqual': '5.15.*'}, {'status': 'unaffected', 'version': '6.1.178', 'versionType': 'semver', 'lessThanOrEqual': '6.1.*'}, {'status': 'unaffected', 'version': '6.6.145', 'versionType': 'semver', 'lessThanOrEqual': '6.6.*'}, {'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-rc2', 'versionType': 'original_commit_for_fix', 'lessThanOrEqual': '*'}], 'programFiles': ['net/batman-adv/routing.c'], 'defaultStatus': 'affected'}]
    Added Description In the Linux kernel, the following vulnerability has been resolved: batman-adv: access unicast_ttvn skb->data only after skb realloc The pskb_may_pull() called by batadv_get_vid() could reallocate the buffer behind the skb. Variables which were pointing to the old buffer need to be reassigned to avoid an use-after-free. This was done correctly for the ethernet header but missed for the unicast_packet pointer.
    Added Reference https://git.kernel.org/stable/c/7141990add3f75436f2933cb310654cad3b1e3e9
    Added Reference https://git.kernel.org/stable/c/7b162b36de750565404cd3b98315706622c6974f
    Added Reference https://git.kernel.org/stable/c/979175834a699ccc3c4c0b0ba60ecae0f135a587
    Added Reference https://git.kernel.org/stable/c/9a7b7248798123efbd5fafe58461d57c7cc718af
    Added Reference https://git.kernel.org/stable/c/9c2c05629e46c1fd43931506d41c56a885a98eb4
    Added Reference https://git.kernel.org/stable/c/aa9558af859934f24717d4bab97d61004f91a736
    Added Reference https://git.kernel.org/stable/c/b8afcf799b2cc92c41beebd029e53ed18960184a
    Added Reference https://git.kernel.org/stable/c/ed90eb5c68420cdfe67ec1f773324198d2ef6f50
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: 9.8
Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality Impact
Integrity Impact
Availability Impact