CVE-2026-46208

batman-adv: stop tp_meter sessions during mesh teardown

State: Published
Severity: 7.8 High
Published: May 28, 2026
Updated: Aug 5, 2026
Reserved: May 13, 2026

Description

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.

Scores

CVSS	Score	Vector	Source
3.1	7.8 High	CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H	Linux

Weaknesses

The record names no weakness.

Affected Products

Product	Versions
LinuxLinux	33a3bb4a3345bb511f9c69c913da95d4693e2a4e to before 5e7d0ac936354c36810e74ac3056b334ed1f4058Affected 33a3bb4a3345bb511f9c69c913da95d4693e2a4e to before 268078acae72daa12b17b2b299701cb9924e469aAffected 33a3bb4a3345bb511f9c69c913da95d4693e2a4e to before 58943b7ea356294749dae3e75b96c0ee292c00beAffected 33a3bb4a3345bb511f9c69c913da95d4693e2a4e to before 79bc0eaeef2c5797317bf2da8e3159a74d62ec47Affected 33a3bb4a3345bb511f9c69c913da95d4693e2a4e to before 26dfeee8db81354bfdade155f27f9e16510ad196Affected 33a3bb4a3345bb511f9c69c913da95d4693e2a4e to before 03660dab86f93319178a24667f6998526dc4355dAffected 33a3bb4a3345bb511f9c69c913da95d4693e2a4e to before 8634c1dbd73adb74d40533ebb7e914efb82e71fbAffected 33a3bb4a3345bb511f9c69c913da95d4693e2a4e to before 3d3cf6a7314aca4df0a6dde28ce784a2a30d0166Affected
LinuxLinux	4.8Affected before 4.8Not affected 5.10.259 through 5.10.Not affected 5.15.210 through 5.15.Not affected 6.1.176 through 6.1.Not affected 6.6.140 through 6.6.Not affected 6.12.90 through 6.12.Not affected 6.18.32 through 6.18.Not affected 7.0.9 through 7.0.*Not affected 7.1 and laterNot affected

Product

Versions

LinuxLinux

33a3bb4a3345bb511f9c69c913da95d4693e2a4e to before 5e7d0ac936354c36810e74ac3056b334ed1f4058Affected
33a3bb4a3345bb511f9c69c913da95d4693e2a4e to before 268078acae72daa12b17b2b299701cb9924e469aAffected
33a3bb4a3345bb511f9c69c913da95d4693e2a4e to before 58943b7ea356294749dae3e75b96c0ee292c00beAffected
33a3bb4a3345bb511f9c69c913da95d4693e2a4e to before 79bc0eaeef2c5797317bf2da8e3159a74d62ec47Affected
33a3bb4a3345bb511f9c69c913da95d4693e2a4e to before 26dfeee8db81354bfdade155f27f9e16510ad196Affected
33a3bb4a3345bb511f9c69c913da95d4693e2a4e to before 03660dab86f93319178a24667f6998526dc4355dAffected
33a3bb4a3345bb511f9c69c913da95d4693e2a4e to before 8634c1dbd73adb74d40533ebb7e914efb82e71fbAffected
33a3bb4a3345bb511f9c69c913da95d4693e2a4e to before 3d3cf6a7314aca4df0a6dde28ce784a2a30d0166Affected

LinuxLinux

4.8Affected
before 4.8Not affected
5.10.259 through 5.10.*Not affected
5.15.210 through 5.15.*Not affected
6.1.176 through 6.1.*Not affected
6.6.140 through 6.6.*Not affected
6.12.90 through 6.12.*Not affected
6.18.32 through 6.18.*Not affected
7.0.9 through 7.0.*Not affected
7.1 and laterNot affected

References

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