batman-adv: tp_meter sessions leak during mesh teardown
CVE-2026-46208 Published on May 28, 2026
batman-adv: stop tp_meter sessions during mesh teardown
In the Linux kernel, the following vulnerability has been resolved:
batman-adv: stop tp_meter sessions during mesh teardown
TP meter sessions remain linked on bat_priv->tp_list after the netlink
request has already finished. When the mesh interface is removed,
batadv_mesh_free() currently tears down the mesh without first draining
these sessions.
A running sender thread or a late incoming tp_meter packet can then keep
processing against a mesh instance which is already shutting down.
Synchronize tp_meter with the mesh lifetime by stopping all active
sessions from batadv_mesh_free() and waiting for sender threads to exit
before teardown continues.
Products Associated with CVE-2026-46208
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Affected Versions
Linux:- Version 33a3bb4a3345bb511f9c69c913da95d4693e2a4e and below 79bc0eaeef2c5797317bf2da8e3159a74d62ec47 is affected.
- Version 33a3bb4a3345bb511f9c69c913da95d4693e2a4e and below 26dfeee8db81354bfdade155f27f9e16510ad196 is affected.
- Version 33a3bb4a3345bb511f9c69c913da95d4693e2a4e and below 03660dab86f93319178a24667f6998526dc4355d is affected.
- Version 33a3bb4a3345bb511f9c69c913da95d4693e2a4e and below 8634c1dbd73adb74d40533ebb7e914efb82e71fb is affected.
- Version 33a3bb4a3345bb511f9c69c913da95d4693e2a4e and below 3d3cf6a7314aca4df0a6dde28ce784a2a30d0166 is affected.
- Version 4.8 is affected.
- Before 4.8 is unaffected.
- Version 6.6.140, <= 6.6.* is unaffected.
- Version 6.12.90, <= 6.12.* is unaffected.
- Version 6.18.32, <= 6.18.* is unaffected.
- Version 7.0.9, <= 7.0.* is unaffected.
- Version 7.1-rc4, <= * is unaffected.