CVE-2026-46208
HighCVSS 7.8Exploitation Probability (EPSS)
Low risk3th percentile - higher than 3% of all known CVEs
Summary
A vulnerability has been identified in the Linux kernel's batman-adv module, allowing tp_meter sessions to continue after the netlink request has finished. During the removal of the mesh interface, these sessions are not properly stopped, potentially leading to synchronization issues.
Risk Assessment
The organization may face unexpected system behavior as active tp_meter sessions attempt to process data during the shutdown of the mesh interface, which could result in data loss or network instability.
Recommendation
It is recommended to update the Linux kernel to a version that includes a fix for this vulnerability to ensure synchronization of tp_meter sessions with the mesh interface lifecycle.
Other vulnerabilities in Linux kernel, batman-adv module
See all- CVE-2026-46238High
A vulnerability has been identified in the Linux kernel within the batman-adv module, concerning the storage of unowned originator pointers in the BAT IV neighbor state. This pointer may no longer refer to a live entry after purge handling, leading to potential data integrity issues.
- CVE-2026-46233Medium
A vulnerability has been identified in the Linux kernel within the batman-adv module, specifically in the batadv_bla_purge_claims() function. The issue arises when the function encounters a claim that is in the process of being released, leading to a NULL pointer dereference.
- CVE-2026-46231Medium
A vulnerability has been identified in the Linux kernel within the batman-adv module, which involves leaking a reference to the backbone_gw object when failing to add a new claim to the hash.
- CVE-2026-46212High
A vulnerability has been identified in the Linux kernel within the batman-adv module, concerning improper memory management during the deletion of claims. The issue can lead to a use-after-free situation, potentially resulting in unpredictable system behavior.
- CVE-2026-46198High
A vulnerability related to integer overflow in the batman-adv module has been fixed in the Linux kernel. The issue concerns the batadv_iv_ogm_send_to_if function, where the size check was performed using the int type, while the buff_pos variable uses the s16 type, potentially leading to an out-of-bounds read.
Original NVD description (English source)
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.