CVE-2026-72235

Описание

In the Linux kernel, the following vulnerability has been resolved: batman-adv: retrieve ethhdr after potential skb realloc on RX pskb_may_pull() in batadv_interface_rx() could reallocate the buffer behind the skb. Variables which were pointing to the old buffer need to be reassigned to avoid an use-after-free. This was done correctly for the VLAN header but missed for the ethernet header which is later used for the TT and AP isolation handling.

A flaw was found in the Linux kernel (batman-adv component). The batadv_interface_rx() function, responsible for handling network packets, can reallocate its internal buffer. However, a pointer to the ethernet header is not correctly updated after this reallocation. This oversight leads to a use-after-free vulnerability, where the system attempts to access memory that has already been released. A remote attacker could potentially exploit this to cause a denial of service (DoS) or disclose sensitive information, impacting network traffic processing and isolation.