VYPR
← All advisories
Critical severity9.8NVD Advisory· Published Jul 25, 2026· Updated Oct 19, 2026

CVE-2026-64355

CVE-2026-64355

Description

In the Linux kernel, the following vulnerability has been resolved:

bpf: Reject fragmented frames in devmap

Devmap broadcast redirects clone the packet for all but the last destination.

For native XDP, that clone path copies only the linear xdp_frame data, while fragmented frames keep skb_shared_info in tailroom outside the linear area. Cloning such a frame leaves XDP_FLAGS_HAS_FRAGS set but without valid frag metadata, and the later free path can interpret uninitialized tail data as skb_shared_info, leading to an out-of-bounds access during frame return.

Reject fragmented native XDP frames in dev_map_enqueue_clone().

Add the same restriction to the generic XDP clone path in dev_map_redirect_clone(). Generic XDP represents fragmented packets as nonlinear skbs, and rejecting them here keeps clone-based broadcast support aligned between native and generic XDP.

AI Insight

LLM-synthesized narrative grounded in this CVE's description and references.

Affected products

17

Patches

Vulnerability mechanics

References

7

News mentions

0

No linked articles in our index yet.