CVE-2026-46238
HighCVSS 8.8Exploitation Probability (EPSS)
Low risk9th percentile - higher than 9% of all known CVEs
Summary
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.
Risk Assessment
Organizations may face performance and stability issues in their networks, as incorrect pointers could lead to communication errors between nodes.
Recommendation
It is recommended to update the Linux kernel to the latest version to mitigate this vulnerability and to monitor network status for potential issues.
Original NVD description (English source)
In the Linux kernel, the following vulnerability has been resolved: batman-adv: stop caching unowned originator pointers in BAT IV BAT IV keeps the last-hop neighbor address in each neigh_node, but some paths also cache an originator pointer derived from a temporary lookup. That pointer is not owned by the neigh_node and may no longer refer to a live originator entry after purge handling runs. Stop storing the auxiliary originator pointer in the BAT IV neighbor state. When BAT IV needs the neighbor originator data, resolve it from the stored neighbor address and drop the reference again after use. [sven: avoid bonding logic for outgoing OGM]