CVE-2026-72231
HighCVSS 7.5Exploitation Probability (EPSS)
Low risk50th percentile - higher than 50% of all known CVEs
Summary
In the Linux kernel's batman-adv module, the function batadv_send_tt_request() checks for 'ret == true' instead of 'ret == false' after a failed send buffer allocation. This causes the TT request information not to be cleaned up, potentially leading to request storms.
Risk Assessment
The vulnerability could lead to network overload due to excessive TT requests, potentially disrupting mesh network operation.
Recommendation
Install the Linux kernel patch that inverts the condition check. Monitor the network for anomalies related to TT requests.
Original NVD description (English source)
In the Linux kernel, the following vulnerability has been resolved: batman-adv: tt: avoid request storms during pending request batadv_send_tt_request() allocates a tt_req_node when none exists for the destination originator node. This should prevent that a multiple TT requests are send at the same time to an originator. But if allocation of the send buffer failed, this request must be cleaned up again. But indicator for such a failure is "ret == false". But the actual implementation is checking for "ret == true". The check must be inverted to not loose the information about the TT request directly after it was attempted to be sent out. This should avoid potential request storms.