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.
Other vulnerabilities in Linux kernel, batman-adv module
See all- 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-2026-46208High
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.
- 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 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]