CVE-2026-64094 Details
Description
In the Linux kernel, the following vulnerability has been resolved: batman-adv: bla: avoid NULL-ptr deref for claim via dropped interface Without rtnl_lock held, a hardif might be retrieved as primary interface of a meshif, but then (while operating on this interface) getting decoupled from the mesh interface. In this case, the meshif still exists but the pointer from the primary hardif to the meshif is set to NULL. The mesh_iface must be checked first to be non-NULL before continuing to send an ARP request using meshif.
A vulnerability in the Linux kernel's batman-adv module can lead to a NULL pointer dereference when handling claims via a dropped interface. This issue arises because, without the proper lock, a hard interface may be incorrectly identified as the primary interface of a mesh interface. If the hard interface gets decoupled from the mesh interface while still being treated as primary, the mesh interface pointer is set to NULL. Consequently, any attempt to send an ARP request using the mesh interface will fail. The vulnerability affects several versions of the Linux kernel.
Users can upgrade to the latest stable version of the Linux kernel, where this vulnerability has been addressed.
Metrics
CVSS 4.0 Severity and Vector Strings:
No CVSS 4.0 data is available for this CVE.
CVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
No SSVC data is available for this CVE.
References to Advisories, Solutions, and Tools
By selecting these links, you will be leaving this site. These are references gathered from the official CVE record and are not endorsed by Volerion.
| URL | Source(s) | Tag(s) |
|---|---|---|
| https://git.kernel.org/stable/c/0f3ebd7bb417aabc44853cc7c2a184ebb0e05b45 | kernel.org | Patch |
| https://git.kernel.org/stable/c/2a8c9e86529156c62d9187b9ed9454c31665ad33 | kernel.org | Patch |
| https://git.kernel.org/stable/c/4f6266735a0ba6a568b6d4c9fa51c33a5a7f2d70 | kernel.org | Patch |
| https://git.kernel.org/stable/c/53cb3511f6eda37d3bd923545fdba6013b6d7bb7 | kernel.org | Patch |
| https://git.kernel.org/stable/c/555b8d3f5c313d81d46274fd0976352dafc80124 | kernel.org | Patch |
| https://git.kernel.org/stable/c/6921a7683ae9ad0208d829e71f725a9e25ccff49 | kernel.org | Patch |
| https://git.kernel.org/stable/c/efb62458c94db1fe3a287e7e89c31b0cfb03f938 | kernel.org | Patch |
| https://git.kernel.org/stable/c/f80d3d98d2ff78d9e2fe5d68b1f45948c4f7bd24 | kernel.org | Patch |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-476 | NULL Pointer Dereference | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| linux linux kernel | >= 3.5, < 5.10.259 >= 5.11, < 5.15.210 >= 5.16, < 6.1.176 >= 6.2, < 6.6.143 >= 6.7, < 6.12.93 >= 6.13, < 6.18.34 >= 6.19, < 7.0.11 7.1 rc1 7.1 rc2 7.1 rc3 7.1 rc4 |
CPE
Remediation
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Change History
2 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Aug 11, 2026 | Initial Analysis | [email protected] |
| Jul 19, 2026 | New CVE Received | kernel.org |