Immediate
Before a patch is released, reduce exposure immediately and only allow trusted sources to reach the affected service.
root@hackertop:~/vulnfeed/CVE-2026-46238#
CVE-2026-46238
MEDIUM
CVE
⚠ Unpatched · Zero-day◉ PoC 公开
Lifecycle 4/7
Linux Kernel up to 7.1-rc3 batman-adv neigh_node state issue
LIFECYCLE
5.3
CVSS
Vulnerability Description
A vulnerability has been found in Linux Kernel up to 6.6.139/6.12.89/6.18.31/7.0.8/7.1-rc3 (Operating System) and classified as critical. Affected by this vulnerability is the function neigh_node of the component batman-adv. Upgrading to version 6.6.140, 6.12.90, 6.18.32, 7.0.9 or 7.1-rc4 eliminates this vulnerability. Applying the patch aafcbaf1159ea224528ca4075d0ba8c10ef374af/6e20700f8c524ac379ba8274ff5d453023b7c006/09dc0d1a12222ffca6481916eab3cfea477b9620/67bceeb22207f1f5a402973a3a0809e5f2698f38/f03e8583532941b07761c5429de7d50766fa3110 is able to eliminate this problem. The bugfix is ready for download at git.kernel.org. The best possible mitigation is suggested to be upgrading to the latest version.
Root Cause Analysis
The CWE definition for the vulnerability is CWE-371.
Impact: As an impact it is known to affect confidentiality, integrity, and availability.
Countermeasure: Upgrading to version 6.6.140, 6.12.90, 6.18.32, 7.0.9 or 7.1-rc4 eliminates this vulnerability. Applying the patch aafcbaf1159ea224528ca4075d0ba8c10ef374af/6e20700f8c524ac379ba8274ff5d453023b7c006/09dc0d1a12222ffca6481916eab3cfea477b9620/67bceeb22207f1f5a402973a3a0809e5f2698f38/f03e8583532941b07761c5429de7d50766fa3110 is able to eliminate this problem. The bugfix is ready for download at git.kernel.org. The best possible mitigation is suggested to be upgrading to the latest version.
Impact: As an impact it is known to affect confidentiality, integrity, and availability.
Countermeasure: Upgrading to version 6.6.140, 6.12.90, 6.18.32, 7.0.9 or 7.1-rc4 eliminates this vulnerability. Applying the patch aafcbaf1159ea224528ca4075d0ba8c10ef374af/6e20700f8c524ac379ba8274ff5d453023b7c006/09dc0d1a12222ffca6481916eab3cfea477b9620/67bceeb22207f1f5a402973a3a0809e5f2698f38/f03e8583532941b07761c5429de7d50766fa3110 is able to eliminate this problem. The bugfix is ready for download at git.kernel.org. The best possible mitigation is suggested to be upgrading to the latest version.
Validation (PoC/EXP) - Looking for Contributors
No public PoC yet
Public validation traces already exist. Community contributors can extend them with richer reproduction content.
Contribute Your PoC/EXP
Log in to contribute PoC/EXP content. Log in
Mitigation Plan - Sorted by Priority
High
Enable extra access controls, WAF/ACL, or reverse-proxy rules for Kernel.
High
Use logs and IOCs to hunt through production traffic and confirm whether exploitation traces already exist.
Medium
Keep this issue on the watch list and follow vendor advisories, rollback notices, and new variants.
Vulnerability Lifecycle - Click each stage to inspect details
The issue has entered HackerTop VulnFeed and is now being tracked by the community.
The vulnerability has been synchronized into the platform and entered the visible triage flow.
Initial impact validation is complete based on current disclosure, technical details, and public intelligence.
A public proof path already exists for reference.
No in-the-wild exploitation has been confirmed yet, but monitoring should continue.
No vendor patch is available yet. Apply temporary mitigations first.
Reduce exposure, restrict access, and inspect logs until a permanent fix is available.
5.3
CVSS
Temp Score
5.3
MEDIUM
Vector String
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Metric Details
Attack Vector
Attack Vector
Network
Attack Complexity
Attack Complexity
Low
Privileges Required
Privileges Required
None
User Interaction
User Interaction
None
Confidentiality Impact
Confidentiality Impact
High
Integrity Impact
Integrity Impact
High
Availability Impact
Availability Impact
High
Back to VulnFeed
CVE-2026-46238 · CVSS 5.3 · Active Threat
