IT

Tracker / CVE-2026-52916

CVE-2026-52916

Medium 5.5

In the Linux kernel, the following vulnerability has been resolved: batman-adv: frag: disallow unicast fragment in fragment batadv_frag_skb_buffer() is called by batadv_batman_skb_recv() when a BATADV_UNICAST_FRAG packet is received. Once all fragments are collected and the packet is reassembled, batadv_recv_frag_packet() calls batadv_batman_skb_recv() again to process the defragmented payload. A malicious sender can craft a BATADV_UNICAST_FRAG packet whose reassembled payload is itself a BATADV_UNICAST_FRAG packet (matryoshka-style nesting). Each nesting level recurses through batadv_batman_skb_recv() without bound, growing the kernel stack until it is exhausted. Since refragmentation or fragments in fragments are not actually allowed, discard all packets which are still BATADV_UNICAST_FRAG packets after the defragmentation process.

Affected products and versions

linux linux_kernel
linux linux_kernel · 3.13 → 5.10.258
linux linux_kernel · 5.11 → 5.15.209
linux linux_kernel · 5.16 → 6.1.175
linux linux_kernel · 6.13 → 6.18.34
linux linux_kernel · 6.19 → 7.0.11
linux linux_kernel · 6.2 → 6.6.142
linux linux_kernel · 6.7 → 6.12.92

Analysis

This page is not indexable yet.Until it carries original analysis — what it actually exposes, how to check in two minutes whether a system was touched, what to do if it was — the page stays noindex. The database decides that, not the template.

References