CVE-2026-46212
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 improper memory management during the deletion of claims. The issue can lead to a use-after-free situation, potentially resulting in unpredictable system behavior.
Risk Assessment
This vulnerability may lead to system crashes or allow an attacker to execute unauthorized code in the kernel context, posing a serious threat to system stability and security.
Recommendation
It is recommended to update the Linux kernel to the latest version where this vulnerability has been fixed to minimize the risk associated with its exploitation.
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-2026-46208High
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: bla: prevent use-after-free when deleting claims When batadv_bla_del_backbone_claims() removes all claims for a backbone, it does this by dropping the link entry in the hash list. This list entry itself was one of the references which need to be dropped at the same time via batadv_claim_put(). But the batadv_claim_put() must not be done before the last access to the claim object in this function. Otherwise the claim might be freed already by the batadv_claim_release() function before the list entry was dropped.