batman-adv: frag: disallow unicast fragment in fragment

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CVE-2026-52916

A flaw was found in the Linux kernel's batman-adv module. A remote attacker can exploit this vulnerability by sending specially crafted BATADVUNICASTFRAG packets, which are designed to contain other fragmented packets. This 'fragments in fragments' scenario causes the kernel to recursively proces...

UBUNTU-CVE-2026-52916

In the Linux kernel, the following vulnerability has been resolved: batman-adv: frag: disallow unicast fragment in fragment batadvfragskbbuffer is called by batadvbatmanskbrecv when a BATADVUNICASTFRAG packet is received. Once all fragments are collected and the packet is reassembled,...

CVE-2026-52916

The CVE-2026-52916 issue affects the Linux kernel’s BATMAN-adv fragment handling. batadv_frag_skb_buffer() is invoked when a BATADV_UNICAST_FRAG packet is received, and after defragmentation, batadv_batman_skb_recv() processes the payload again. A malicious sender could craft a BATADV_UNICAST_FRA...

EUVD-2026-38719

In the Linux kernel, the following vulnerability has been resolved: batman-adv: frag: disallow unicast fragment in fragment batadvfragskbbuffer is called by batadvbatmanskbrecv when a BATADVUNICASTFRAG packet is received. Once all fragments are collected and the packet is reassembled,...

PT-2026-51709

Name of the Vulnerable Software and Affected Versions Linux kernel affected versions not specified Description An issue exists in the batman-adv module where the batadv frag skb buffer function is called by batadv batman skb recv upon receiving a BATADV UNICAST FRAG packet. After reassembling the...

Linux Distros Unpatched Vulnerability : CVE-2026-52916

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - batman-adv: frag: disallow unicast fragment in fragment batadvfragskbbuffer is called by batadvbatmanskbrecv when a BATADVUNICASTFRAG packet is received. Once a...